chore(deps): bump mpmath from 1.3.0 to 1.4.1 in /application

Bumps [mpmath](https://github.com/mpmath/mpmath) from 1.3.0 to 1.4.1.
- [Release notes](https://github.com/mpmath/mpmath/releases)
- [Changelog](https://github.com/mpmath/mpmath/blob/1.4.1/CHANGES)
- [Commits](https://github.com/mpmath/mpmath/compare/1.3.0...1.4.1)

---
updated-dependencies:
- dependency-name: mpmath
  dependency-version: 1.4.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.env-template

@@ -1,9 +1,42 @@
 API_KEY=<LLM api key (for example, open ai key)>
 LLM_NAME=docsgpt
 VITE_API_STREAMING=true
+INTERNAL_KEY=<internal key for worker-to-backend authentication>
+
+# Provider-specific API keys (optional - use these to enable multiple providers)
+# OPENAI_API_KEY=<your-openai-api-key>
+# ANTHROPIC_API_KEY=<your-anthropic-api-key>
+# GOOGLE_API_KEY=<your-google-api-key>
+# GROQ_API_KEY=<your-groq-api-key>
+# NOVITA_API_KEY=<your-novita-api-key>
+# OPEN_ROUTER_API_KEY=<your-openrouter-api-key>
+
+# Remote Embeddings (Optional - for using a remote embeddings API instead of local SentenceTransformer)
+# When set, the app will use the remote API and won't load SentenceTransformer (saves RAM)
+EMBEDDINGS_BASE_URL=
+EMBEDDINGS_KEY=
 
 #For Azure (you can delete it if you don't use Azure)
 OPENAI_API_BASE=
 OPENAI_API_VERSION=
 AZURE_DEPLOYMENT_NAME=
-AZURE_EMBEDDINGS_DEPLOYMENT_NAME=
+AZURE_EMBEDDINGS_DEPLOYMENT_NAME=
+
+#Azure AD Application (client) ID
+MICROSOFT_CLIENT_ID=your-azure-ad-client-id
+#Azure AD Application client secret
+MICROSOFT_CLIENT_SECRET=your-azure-ad-client-secret
+#Azure AD Tenant ID (or 'common' for multi-tenant)
+MICROSOFT_TENANT_ID=your-azure-ad-tenant-id
+#If you are using a Microsoft Entra ID tenant,
+#configure the AUTHORITY variable as
+#"https://login.microsoftonline.com/TENANT_GUID"
+#or "https://login.microsoftonline.com/contoso.onmicrosoft.com".
+#Alternatively, use "https://login.microsoftonline.com/common" for multi-tenant app.
+MICROSOFT_AUTHORITY=https://{tenantId}.ciamlogin.com/{tenantId}
+
+# User-data Postgres DB (Phase 0 of the MongoDB→Postgres migration).
+# Standard Postgres URI — `postgres://` and `postgresql://` both work.
+# Leave unset while the migration is still being rolled out; the app will
+# fall back to MongoDB for user data until POSTGRES_URI is configured.
+# POSTGRES_URI=postgresql://docsgpt:docsgpt@localhost:5432/docsgpt

.github/INCIDENT_RESPONSE.md

@@ -0,0 +1,99 @@
+# DocsGPT Incident Response Plan (IRP)
+
+This playbook describes how maintainers respond to confirmed or suspected security incidents.
+
+- Vulnerability reporting: [`SECURITY.md`](../SECURITY.md)
+- Non-security bugs/features: [`CONTRIBUTING.md`](../CONTRIBUTING.md)
+
+## Severity
+
+| Severity | Definition | Typical examples |
+|---|---|---|
+| **Critical** | Active exploitation, supply-chain compromise, or confirmed data breach requiring immediate user action. | Compromised release artifact/image; remote execution. |
+| **High** | Serious undisclosed vulnerability with no practical workaround, or CVSS >= 7.0. | key leakage; prompt injection enabling cross-tenant access. |
+| **Medium** | Material impact but constrained by preconditions/scope, or a practical workaround exists. | Auth-required exploit; dependency CVE with limited reachability. |
+| **Low** | Defense-in-depth or narrow availability impact with no confirmed data exposure. | Missing rate limiting; hardening gap without exploit evidence. |
+
+
+## Response workflow
+
+### 1) Triage (target: initial response within 48 hours)
+
+1. Acknowledge report.
+2. Validate on latest release and `main`.
+3. Confirm in-scope security issue vs. hardening item (per `SECURITY.md`).
+4. Assign severity and open a **draft GitHub Security Advisory (GHSA)** (no public issue).
+5. Determine whether root cause is DocsGPT code or upstream dependency/provider.
+
+### 2) Investigation
+
+1. Identify affected components, versions, and deployment scope (self-hosted, cloud, or both).
+2. For AI issues, explicitly evaluate prompt injection, document isolation, and output leakage.
+3. Request a CVE through GHSA for **Medium+** issues.
+
+### 3) Containment, fix, and disclosure
+
+1. Implement and test fix in private security workflow (GHSA private fork/branch).
+2. Merge fix to `main`, cut patched release, and verify published artifacts/images.
+3. Patch managed cloud deployment (`app.docsgpt.cloud`) and other deployments as soon as validated.
+4. Publish GHSA with CVE (if assigned), affected/fixed versions, CVSS, mitigations, and upgrade guidance.
+5. **Critical/High:** coordinate disclosure timing with reporter (goal: <= 90 days) and publish a notice.
+6. **Medium/Low:** include in next scheduled release unless risk requires immediate out-of-band patching.
+
+### 4) Post-incident
+
+1. Monitor support channels (GitHub/Discord) for regressions or exploitation reports.
+2. Run a short retrospective (root cause, detection, response gaps, prevention work).
+3. Track follow-up hardening actions with owners/dates.
+4. Update this IRP and related runbooks as needed.
+
+## Scenario playbooks
+
+### Supply-chain compromise
+
+1. Freeze releases and investigate blast radius.
+2. Rotate credentials in order: Docker Hub -> GitHub tokens -> LLM provider keys -> DB credentials -> `JWT_SECRET_KEY` -> `ENCRYPTION_SECRET_KEY` -> `INTERNAL_KEY`.
+3. Replace compromised artifacts/tags with clean releases and revoke/remove bad tags where possible.
+4. Publish advisory with exact affected versions and required user actions.
+
+### Data exposure
+
+1. Determine scope (users, documents, keys, logs, time window).
+2. Disable affected path or hotfix immediately for managed cloud.
+3. Notify affected users with concrete remediation steps (for example, rotate keys).
+4. Continue through standard fix/disclosure workflow.
+
+### Critical regression with security impact
+
+1. Identify introducing change (`git bisect` if needed).
+2. Publish workaround within 24 hours (for example, pin to known-good version).
+3. Ship patch release with regression test and close incident with public summary.
+
+## AI-specific guidance
+
+Treat confirmed AI-specific abuse as security incidents:
+
+- Prompt injection causing sensitive data exfiltration (from tools that don't belong to the agent) -> **High**
+- Cross-tenant retrieval/isolation failure -> **High**
+- API key disclosure in output -> **High**
+
+## Secret rotation quick reference
+
+| Secret | Standard rotation action |
+|---|---|
+| Docker Hub credentials | Revoke/replace in Docker Hub; update CI/CD secrets |
+| GitHub tokens/PATs | Revoke/replace in GitHub; update automation secrets |
+| LLM provider API keys | Rotate in provider console; update runtime/deploy secrets |
+| Database credentials | Rotate in DB platform; redeploy with new secrets |
+| `JWT_SECRET_KEY` | Rotate and redeploy (invalidates all active user sessions/tokens) |
+| `ENCRYPTION_SECRET_KEY` | Rotate and redeploy (re-encrypt stored data if possible; existing encrypted data may become inaccessible) |
+| `INTERNAL_KEY` | Rotate and redeploy (invalidates worker-to-backend authentication) |
+
+## Maintenance
+
+Review this document:
+
+- after every **Critical/High** incident, and
+- at least annually.
+
+Changes should be proposed via pull request to `main`.

.github/styles/config/vocabularies/DocsGPT/accept.txt

@@ -1,46 +1,80 @@
-Ollama
-Qdrant
-Milvus
-Chatwoot
-Nextra
-VSCode
-npm
-LLMs
+Agentic
+Anthropic's
+api
 APIs
-Groq
-SGLang
-LMDeploy
-OAuth
-Vite
-LLM
-JSONPath
-UIs
+Atlassian
+automations
+autoescaping
+Autoescaping
+backfill
+backfills
+bool
+boolean
+brave_web_search
+chatbot
+Chatwoot
+config
 configs
-uncomment
-qdrant
-vectorstore
+CSVs
+dev
+diarization
+Docling
 docsgpt
-llm
+docstrings
+Entra
+env
+enqueues
+EOL
+ESLint
+feedbacks
+Figma
 GPUs
+Groq
+hardcode
+hardcoding
+Idempotency
+JSONPath
 kubectl
 Lightsail
-enqueues
-chatbot
-VSCode's
-Shareability
-feedbacks
-automations
+llama_cpp
+llm
+LLM
+LLMs
+LMDeploy
+Milvus
+Mixtral
+namespace
+namespaces
+needs_auth
+Nextra
+Novita
+npm
+OAuth
+Ollama
+opencode
+parsable
+passthrough
+PDFs
+pgvector
+Postgres
 Premade
-Signup
+Pydantic
+pytest
+Qdrant
+qdrant
 Repo
 repo
-env
-URl
-agentic
-llama_cpp
-parsable
+Sanitization
 SDKs
-boolean
-bool
-hardcode
-EOL
+SGLang
+Shareability
+Signup
+Supabase
+UIs
+uncomment
+URl
+vectorstore
+Vite
+VSCode
+VSCode's
+widget's

.github/workflows/lint.yml

@@ -7,6 +7,9 @@ on:
   pull_request:
     types: [ opened, synchronize ]
 
+permissions:
+  contents: read
+
 jobs:
   ruff:
     runs-on: ubuntu-latest

.github/workflows/npm-publish.yml

@@ -0,0 +1,114 @@
+name: Publish npm libraries
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: >
+          Version bump type (patch | minor | major) or explicit semver (e.g. 1.2.3).
+          Applies to both docsgpt and docsgpt-react.
+        required: true
+        default: patch
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    environment: npm-release
+    defaults:
+      run:
+        working-directory: extensions/react-widget
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          registry-url: https://registry.npmjs.org
+
+      - name: Install dependencies
+        run: npm ci
+
+      # ── docsgpt (HTML embedding bundle) ──────────────────────────────────
+      # Uses the `build` script (parcel build src/browser.tsx) and keeps
+      # the `targets` field so Parcel produces browser-optimised bundles.
+
+      - name: Set package name → docsgpt
+        run: jq --arg n "docsgpt" '.name=$n' package.json > _tmp.json && mv _tmp.json package.json
+
+      - name: Bump version (docsgpt)
+        id: version_docsgpt
+        run: |
+          VERSION="${{ github.event.inputs.version }}"
+          NEW_VER=$(npm version "${VERSION:-patch}" --no-git-tag-version)
+          echo "version=${NEW_VER#v}" >> "$GITHUB_OUTPUT"
+
+      - name: Build docsgpt
+        run: npm run build
+
+      - name: Publish docsgpt
+        run: npm publish --verbose
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      # ── docsgpt-react (React library bundle) ─────────────────────────────
+      # Uses `build:react` script (parcel build src/index.ts) and strips
+      # the `targets` field so Parcel treats the output as a plain library
+      # without browser-specific target resolution, producing a smaller bundle.
+
+      - name: Reset package.json from source control
+        run: git checkout -- package.json
+
+      - name: Set package name → docsgpt-react
+        run: jq --arg n "docsgpt-react" '.name=$n' package.json > _tmp.json && mv _tmp.json package.json
+
+      - name: Remove targets field (react library build)
+        run: jq 'del(.targets)' package.json > _tmp.json && mv _tmp.json package.json
+
+      - name: Bump version (docsgpt-react) to match docsgpt
+        run: npm version "${{ steps.version_docsgpt.outputs.version }}" --no-git-tag-version
+
+      - name: Clean dist before react build
+        run: rm -rf dist
+
+      - name: Build docsgpt-react
+        run: npm run build:react
+
+      - name: Publish docsgpt-react
+        run: npm publish --verbose
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      # ── Commit the bumped version back to the repository ─────────────────
+
+      - name: Reset package.json and write final version
+        run: |
+          git checkout -- package.json
+          jq --arg v "${{ steps.version_docsgpt.outputs.version }}" '.version=$v' \
+            package.json > _tmp.json && mv _tmp.json package.json
+          npm install --package-lock-only
+
+      - name: Commit version bump and create PR
+        run: |
+          git config user.name  "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          BRANCH="chore/bump-npm-v${{ steps.version_docsgpt.outputs.version }}"
+          git checkout -b "$BRANCH"
+          git add package.json package-lock.json
+          git commit -m "chore: bump npm libraries to v${{ steps.version_docsgpt.outputs.version }}"
+          git push origin "$BRANCH"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create PR
+        run: |
+          gh pr create \
+            --title "chore: bump npm libraries to v${{ steps.version_docsgpt.outputs.version }}" \
+            --body "Automated version bump after npm publish." \
+            --base main
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pytest.yml

@@ -1,5 +1,9 @@
 name: Run python tests with pytest
 on: [push, pull_request]
+
+permissions:
+  contents: read
+
 jobs:
   pytest_and_coverage:
     name: Run tests and count coverage

.github/workflows/react-widget-build.yml

@@ -0,0 +1,34 @@
+name: React Widget Build
+
+on:
+  push:
+    paths:
+      - 'extensions/react-widget/**'
+  pull_request:
+    paths:
+      - 'extensions/react-widget/**'
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: extensions/react-widget
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: extensions/react-widget/package-lock.json
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build

.github/workflows/vale.yml

@@ -9,6 +9,10 @@ on:
       - '.vale.ini'
       - '.github/styles/**'
 
+permissions:
+  contents: read
+  pull-requests: write
+
 jobs:
   vale:
     runs-on: ubuntu-latest

.github/workflows/zizmor.yml

@@ -0,0 +1,25 @@
+name: GitHub Actions Security Analysis
+
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+    branches: ["**"]
+
+permissions: {}
+
+jobs:
+  zizmor:
+    runs-on: ubuntu-latest
+
+    permissions:
+      security-events: write # Required for upload-sarif (used by zizmor-action) to upload SARIF files.
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor 🌈
+        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2

.gitignore

@@ -2,6 +2,7 @@
 __pycache__/
 *.py[cod]
 *$py.class
+results.txt
 experiments/
 
 experiments
@@ -71,6 +72,7 @@ instance/
 
 # Sphinx documentation
 docs/_build/
+docs/public/_pagefind/
 
 # PyBuilder
 target/
@@ -106,6 +108,8 @@ celerybeat.pid
 # Environments
 .env
 .venv
+# Machine-specific Claude Code guidance (see CLAUDE.md preamble)
+CLAUDE.md
 env/
 venv/
 ENV/
@@ -147,6 +151,10 @@ frontend/yarn-error.log*
 frontend/pnpm-debug.log*
 frontend/lerna-debug.log*
 
+# Keep frontend utility helpers tracked (overrides global lib/ ignore)
+!frontend/src/lib/
+!frontend/src/lib/**
+
 frontend/node_modules
 frontend/dist
 frontend/dist-ssr
@@ -175,5 +183,6 @@ application/vectors/
 
 node_modules/
 .vscode/settings.json
+.vscode/sftp.json
 /models/
 model/

.ruff.toml

@@ -1,2 +1,6 @@
 # Allow lines to be as long as 120 characters.
-line-length = 120
+line-length = 120
+
+[lint.per-file-ignores]
+# Integration tests use sys.path.insert() before imports for standalone execution
+"tests/integration/*.py" = ["E402"]

.vale.ini

@@ -1,5 +1,7 @@
 MinAlertLevel = warning
 StylesPath = .github/styles
+Vocab = DocsGPT
 
 [*.{md,mdx}]
 BasedOnStyles = DocsGPT
+

AGENTS.md

@@ -0,0 +1,134 @@
+# AGENTS.md
+
+- Read `CONTRIBUTING.md` before making non-trivial changes.
+- For day-to-day development and feature work, follow the development-environment workflow rather than defaulting to `setup.sh` / `setup.ps1`.
+- Avoid using the setup scripts during normal feature work unless the user explicitly asks for them. Users configure `.env` usually.
+- Try to follow red/green TDD
+
+### Check existing dev prerequisites first
+
+For feature work, do **not** assume the environment needs to be recreated.
+
+- Check whether the user already has a Python virtual environment such as `venv/` or `.venv/`.
+- Check whether MongoDB is already running.
+- Check whether Redis is already running.
+- Reuse what is already working. Do not stop or recreate MongoDB, Redis, or the Python environment unless the task is environment setup or troubleshooting.
+
+## Normal local development commands
+
+Use these commands once the dev prerequisites above are satisfied.
+
+### Backend
+
+```bash
+source .venv/bin/activate  # macOS/Linux
+uv pip install -r application/requirements.txt  # or: pip install -r application/requirements.txt
+```
+
+Run the Flask API (if needed):
+
+```bash
+flask --app application/app.py run --host=0.0.0.0 --port=7091
+```
+
+Run the Celery worker in a separate terminal (if needed):
+
+```bash
+celery -A application.app.celery worker -l INFO
+```
+
+On macOS, prefer the solo pool for Celery:
+
+```bash
+python -m celery -A application.app.celery worker -l INFO --pool=solo
+```
+
+### Frontend
+
+Install dependencies only when needed, then run the dev server:
+
+```bash
+cd frontend
+npm install --include=dev
+npm run dev
+```
+
+### Docs site
+
+```bash
+cd docs
+npm install
+```
+
+### Python / backend changes validation
+
+```bash
+ruff check .
+python -m pytest
+```
+
+### Frontend changes
+
+```bash
+cd frontend && npm run lint
+cd frontend && npm run build
+```
+
+### Documentation changes
+
+```bash
+cd docs && npm run build
+```
+
+If Vale is installed locally and you edited prose, also run:
+
+```bash
+vale .
+```
+
+## Repository map
+
+- `application/`: Flask backend, API routes, agent logic, retrieval, parsing, security, storage, Celery worker, and WSGI entrypoints.
+- `tests/`: backend unit/integration tests and test-only Python dependencies.
+- `frontend/`: Vite + React + TypeScript application.
+- `frontend/src/`: main UI code, including `components`, `conversation`, `hooks`, `locale`, `settings`, `upload`, and Redux store wiring in `store.ts`.
+- `docs/`: separate documentation site built with Next.js/Nextra.
+- `extensions/`: integrations and widgets such as Chatwoot, Chrome, Discord, React widget, Slack bot, and web widget.
+- `deployment/`: Docker Compose variants and Kubernetes manifests.
+
+## Coding rules
+
+### Backend
+
+- Follow PEP 8 and keep Python line length at or under 120 characters.
+- Use type hints for function arguments and return values.
+- Add Google-style docstrings to new or substantially changed functions and classes.
+- Add or update tests under `tests/` for backend behavior changes.
+- Keep changes narrow in `api`, `auth`, `security`, `parser`, `retriever`, and `storage` areas.
+
+### Backend Abstractions
+
+- LLM providers implement a common interface in `application/llm/` (add new providers by extending the base class).
+- Vector stores are abstracted in `application/vectorstore/`.
+- Parsers live in `application/parser/` and handle different document formats in the ingestion stage.
+- Agents and tools are in `application/agents/` and `application/agents/tools/`.
+- Celery setup/config lives in `application/celery_init.py` and `application/celeryconfig.py`.
+- Settings and env vars are managed via Pydantic in `application/core/settings.py`.
+
+### Frontend
+
+- Follow the existing ESLint + Prettier setup.
+- Prefer small, reusable functional components and hooks.
+- If shared state must be added, use Redux rather than introducing a new global state library.
+- Avoid broad UI refactors unless the task explicitly asks for them.
+- Do not re-create components if we already have some in the app.
+
+## PR readiness
+
+Before opening a PR:
+
+- run the relevant validation commands above
+- confirm backend changes still work end-to-end after ingesting sample data when applicable
+- clearly summarize user-visible behavior changes
+- mention any config, dependency, or deployment implications
+- Ask your user to attach a screenshot or a video to it

CONTRIBUTING.md

@@ -22,6 +22,11 @@ Thank you for choosing to contribute to DocsGPT! We are all very grateful!
 
 - We have a frontend built on React (Vite) and a backend in Python.
 
+> **Required for every PR:** Please attach screenshots or a short screen
+> recording that shows the working version of your changes. This makes the
+> requirement visible to reviewers and helps them quickly verify what you are
+> submitting.
+
   
 Before creating issues, please check out how the latest version of our app looks and works by launching it via [Quickstart](https://github.com/arc53/DocsGPT#quickstart) the version on our live demo is slightly modified with login. Your issues should relate to the version you can launch via [Quickstart](https://github.com/arc53/DocsGPT#quickstart).
 
@@ -125,7 +130,7 @@ Here's a step-by-step guide on how to contribute to DocsGPT:
      ```
 
 9. **Submit a Pull Request (PR):**
-   - Create a Pull Request from your branch to the main repository. Make sure to include a detailed description of your changes and reference any related issues.
+   - Create a Pull Request from your branch to the main repository. Make sure to include a detailed description of your changes, reference any related issues, and attach screenshots or a screen recording showing the working version.
 
 10. **Collaborate:**
    - Be responsive to comments and feedback on your PR.

README.md

@@ -7,7 +7,7 @@
 </p>
 
 <p align="left">
-  <strong><a href="https://www.docsgpt.cloud/">DocsGPT</a></strong> is an open-source AI platform for building intelligent agents and assistants. Features Agent Builder, deep research tools, document analysis (PDF, Office, web content), Multi-model support (choose your provider or run locally), and rich API connectivity for agents with actionable tools and integrations. Deploy anywhere with complete privacy control.
+  <strong><a href="https://www.docsgpt.cloud/">DocsGPT</a></strong> is an open-source AI platform for building intelligent agents and assistants. Features Agent Builder, deep research tools, document analysis (PDF, Office, web content, and audio), Multi-model support (choose your provider or run locally), and rich API connectivity for agents with actionable tools and integrations. Deploy anywhere with complete privacy control.
 </p>
 
 <div align="center">
@@ -29,13 +29,14 @@
 
 <div align="center">
   <br>
-<img src="https://d3dg1063dc54p9.cloudfront.net/videos/demov7.gif" alt="video-example-of-docs-gpt" width="800" height="450">
+<img src="https://d3dg1063dc54p9.cloudfront.net/videos/demo-26.gif" alt="video-example-of-docs-gpt" width="800" height="480">
 </div>
 <h3 align="left">
   <strong>Key Features:</strong>
 </h3>
 <ul align="left">
-    <li><strong>🗂️ Wide Format Support:</strong> Reads PDF, DOCX, CSV, XLSX, EPUB, MD, RST, HTML, MDX, JSON, PPTX, and images.</li>
+    <li><strong>🗂️ Wide Format Support:</strong> Reads PDF, DOCX, CSV, XLSX, EPUB, MD, RST, HTML, MDX, JSON, PPTX, images, and audio files such as MP3, WAV, M4A, OGG, and WebM.</li>
+    <li><strong>🎙️ Speech Workflows:</strong> Record voice input into chat, transcribe audio on the backend, and ingest meeting recordings or voice notes as searchable knowledge.</li>
     <li><strong>🌐 Web & Data Integration:</strong> Ingests from URLs, sitemaps, Reddit, GitHub and web crawlers.</li>
     <li><strong>✅ Reliable Answers:</strong> Get accurate, hallucination-free responses with source citations viewable in a clean UI.</li>
     <li><strong>🔑 Streamlined API Keys:</strong>  Generate keys linked to your settings, documents, and models, simplifying chatbot and integration setup.</li>
@@ -46,24 +47,11 @@
 </ul>
 
 ## Roadmap
-
-- [x] Full GoogleAI compatibility (Jan 2025)
-- [x] Add tools (Jan 2025)
-- [x] Manually updating chunks in the app UI (Feb 2025)
-- [x] Devcontainer for easy development (Feb 2025)
-- [x] ReACT agent (March 2025)
-- [x] Chatbots menu re-design to handle tools, agent types, and more (April 2025)
-- [x] New input box in the conversation menu (April 2025)
-- [x] Add triggerable actions / tools (webhook) (April 2025)
-- [x] Agent optimisations (May 2025)
-- [x] Filesystem sources update (July 2025)
-- [x] Json Responses (August 2025)
-- [x] MCP support (August 2025)
-- [x] Google Drive integration (September 2025)
-- [x] Add OAuth 2.0 authentication for MCP (September 2025)
-- [ ] SharePoint integration (October 2025)
-- [ ] Deep Agents (October 2025)
-- [ ] Agent scheduling
+- [x] Add OAuth 2.0 authentication for MCP ( September 2025 )
+- [x] Deep Agents ( October 2025 )
+- [x] Prompt Templating ( October 2025 )
+- [x] Full api tooling ( Dec 2025 )
+- [ ] Agent scheduling ( Jan 2026 )
 
 You can find our full roadmap [here](https://github.com/orgs/arc53/projects/2). Please don't hesitate to contribute or create issues, it helps us improve DocsGPT!
 
@@ -158,9 +146,16 @@ We as members, contributors, and leaders, pledge to make participation in our co
 
 The source code license is [MIT](https://opensource.org/license/mit/), as described in the [LICENSE](LICENSE) file.
 
-<p>This project is supported by:</p>
+## This project is supported by:
+
 <p>
   <a href="https://www.digitalocean.com/?utm_medium=opensource&utm_source=DocsGPT">
     <img src="https://opensource.nyc3.cdn.digitaloceanspaces.com/attribution/assets/SVG/DO_Logo_horizontal_blue.svg" width="201px">
   </a>
 </p>
+<p>
+  <a href="https://get.neon.com/docsgpt">
+    <img width="201" alt="color" src="https://github.com/user-attachments/assets/7d9813b7-0e6d-403f-b5af-68af066b326f" />
+  </a>
+  
+</p>

SECURITY.md

@@ -2,13 +2,21 @@
 
 ## Supported Versions
 
-Supported Versions:
-
-Currently, we support security patches by committing changes and bumping the version published on Github.
+Security patches target the latest release and the `main` branch. We recommend always running the most recent version.
 
 ## Reporting a Vulnerability
 
-Found a vulnerability? Please email us:
+Preferred method: use GitHub's private vulnerability reporting flow:
+https://github.com/arc53/DocsGPT/security
 
-security@arc53.com
+Then click **Report a vulnerability**.
+
+
+Alternatively, email us at: security@arc53.com
+
+We aim to acknowledge reports within 48 hours.
+
+## Incident Handling
+
+For the public incident response process, see [`INCIDENT_RESPONSE.md`](./.github/INCIDENT_RESPONSE.md). If you believe an active exploit is occurring, include **URGENT** in your report subject line.
 

application/.env_sample

@@ -1,12 +0,0 @@
-API_KEY=your_api_key
-EMBEDDINGS_KEY=your_api_key
-API_URL=http://localhost:7091
-INTERNAL_KEY=your_internal_key
-FLASK_APP=application/app.py
-FLASK_DEBUG=true
-
-#For OPENAI on Azure
-OPENAI_API_BASE=
-OPENAI_API_VERSION=
-AZURE_DEPLOYMENT_NAME=
-AZURE_EMBEDDINGS_DEPLOYMENT_NAME=

application/Dockerfile

@@ -7,7 +7,7 @@ RUN apt-get update && \
     apt-get install -y software-properties-common && \
     add-apt-repository ppa:deadsnakes/ppa && \
     apt-get update && \
-    apt-get install -y --no-install-recommends gcc wget unzip libc6-dev python3.12 python3.12-venv && \
+    apt-get install -y --no-install-recommends gcc g++ wget unzip libc6-dev python3.12 python3.12-venv python3.12-dev && \
     rm -rf /var/lib/apt/lists/* 
 
 # Verify Python installation and setup symlink
@@ -48,7 +48,12 @@ FROM ubuntu:24.04 as final
 RUN apt-get update && \
     apt-get install -y software-properties-common && \
     add-apt-repository ppa:deadsnakes/ppa && \
-    apt-get update && apt-get install -y --no-install-recommends python3.12 && \
+    apt-get update && apt-get install -y --no-install-recommends \
+        python3.12 \
+        libgl1 \
+        libglib2.0-0 \
+        poppler-utils \
+        && \
     ln -s /usr/bin/python3.12 /usr/bin/python && \
     rm -rf /var/lib/apt/lists/*
 

application/agents/agent_creator.py

@@ -1,14 +1,20 @@
-from application.agents.classic_agent import ClassicAgent
-from application.agents.react_agent import ReActAgent
 import logging
 
+from application.agents.agentic_agent import AgenticAgent
+from application.agents.classic_agent import ClassicAgent
+from application.agents.research_agent import ResearchAgent
+from application.agents.workflow_agent import WorkflowAgent
+
 logger = logging.getLogger(__name__)
 
 
 class AgentCreator:
     agents = {
         "classic": ClassicAgent,
-        "react": ReActAgent,
+        "react": ClassicAgent,  # backwards compat: react falls back to classic
+        "agentic": AgenticAgent,
+        "research": ResearchAgent,
+        "workflow": WorkflowAgent,
     }
 
     @classmethod
@@ -16,5 +22,4 @@ class AgentCreator:
         agent_class = cls.agents.get(type.lower())
         if not agent_class:
             raise ValueError(f"No agent class found for type {type}")
-        
         return agent_class(*args, **kwargs)

application/agents/agentic_agent.py

@@ -0,0 +1,63 @@
+import logging
+from typing import Dict, Generator, Optional
+
+from application.agents.base import BaseAgent
+from application.agents.tools.internal_search import (
+    INTERNAL_TOOL_ID,
+    add_internal_search_tool,
+)
+from application.logging import LogContext
+
+logger = logging.getLogger(__name__)
+
+
+class AgenticAgent(BaseAgent):
+    """Agent where the LLM controls retrieval via tools.
+
+    Unlike ClassicAgent which pre-fetches docs into the prompt,
+    AgenticAgent gives the LLM an internal_search tool so it can
+    decide when, what, and whether to search.
+    """
+
+    def __init__(
+        self,
+        retriever_config: Optional[Dict] = None,
+        *args,
+        **kwargs,
+    ):
+        super().__init__(*args, **kwargs)
+        self.retriever_config = retriever_config or {}
+
+    def _gen_inner(
+        self, query: str, log_context: LogContext
+    ) -> Generator[Dict, None, None]:
+        tools_dict = self.tool_executor.get_tools()
+        add_internal_search_tool(tools_dict, self.retriever_config)
+        self._prepare_tools(tools_dict)
+
+        # 4. Build messages (prompt has NO pre-fetched docs)
+        messages = self._build_messages(self.prompt, query)
+
+        # 5. Call LLM — the handler manages the tool loop
+        llm_response = self._llm_gen(messages, log_context)
+
+        yield from self._handle_response(
+            llm_response, tools_dict, messages, log_context
+        )
+
+        # 6. Collect sources from internal search tool results
+        self._collect_internal_sources()
+
+        yield {"sources": self.retrieved_docs}
+        yield {"tool_calls": self._get_truncated_tool_calls()}
+
+        log_context.stacks.append(
+            {"component": "agent", "data": {"tool_calls": self.tool_calls.copy()}}
+        )
+
+    def _collect_internal_sources(self):
+        """Collect retrieved docs from the cached InternalSearchTool instance."""
+        cache_key = f"internal_search:{INTERNAL_TOOL_ID}:{self.user or ''}"
+        tool = self.tool_executor._loaded_tools.get(cache_key)
+        if tool and hasattr(tool, "retrieved_docs") and tool.retrieved_docs:
+            self.retrieved_docs = tool.retrieved_docs

application/agents/base.py

@@ -1,14 +1,16 @@
+import json
 import logging
 import uuid
 from abc import ABC, abstractmethod
-from typing import Dict, Generator, List, Optional
+from typing import Any, Dict, Generator, List, Optional
 
-from bson.objectid import ObjectId
-
-from application.agents.tools.tool_action_parser import ToolActionParser
-from application.agents.tools.tool_manager import ToolManager
-from application.core.mongo_db import MongoDB
+from application.agents.tool_executor import ToolExecutor
+from application.core.json_schema_utils import (
+    JsonSchemaValidationError,
+    normalize_json_schema_payload,
+)
 from application.core.settings import settings
+from application.llm.handlers.base import ToolCall
 from application.llm.handlers.handler_creator import LLMHandlerCreator
 from application.llm.llm_creator import LLMCreator
 from application.logging import build_stack_data, log_activity, LogContext
@@ -23,6 +25,7 @@ class BaseAgent(ABC):
         llm_name: str,
         model_id: str,
         api_key: str,
+        agent_id: Optional[str] = None,
         user_api_key: Optional[str] = None,
         prompt: str = "",
         chat_history: Optional[List[Dict]] = None,
@@ -35,32 +38,63 @@ class BaseAgent(ABC):
         limited_request_mode: Optional[bool] = False,
         request_limit: Optional[int] = settings.DEFAULT_AGENT_LIMITS["request_limit"],
         compressed_summary: Optional[str] = None,
+        llm=None,
+        llm_handler=None,
+        tool_executor: Optional[ToolExecutor] = None,
+        backup_models: Optional[List[str]] = None,
     ):
         self.endpoint = endpoint
         self.llm_name = llm_name
         self.model_id = model_id
         self.api_key = api_key
+        self.agent_id = agent_id
         self.user_api_key = user_api_key
         self.prompt = prompt
         self.decoded_token = decoded_token or {}
         self.user: str = self.decoded_token.get("sub")
-        self.tool_config: Dict = {}
         self.tools: List[Dict] = []
-        self.tool_calls: List[Dict] = []
         self.chat_history: List[Dict] = chat_history if chat_history is not None else []
-        self.llm = LLMCreator.create_llm(
-            llm_name,
-            api_key=api_key,
-            user_api_key=user_api_key,
-            decoded_token=decoded_token,
-            model_id=model_id,
-        )
+
+        # Dependency injection for LLM — fall back to creating if not provided
+        if llm is not None:
+            self.llm = llm
+        else:
+            self.llm = LLMCreator.create_llm(
+                llm_name,
+                api_key=api_key,
+                user_api_key=user_api_key,
+                decoded_token=decoded_token,
+                model_id=model_id,
+                agent_id=agent_id,
+                backup_models=backup_models,
+            )
+
         self.retrieved_docs = retrieved_docs or []
-        self.llm_handler = LLMHandlerCreator.create_handler(
-            llm_name if llm_name else "default"
-        )
+
+        if llm_handler is not None:
+            self.llm_handler = llm_handler
+        else:
+            self.llm_handler = LLMHandlerCreator.create_handler(
+                llm_name if llm_name else "default"
+            )
+
+        # Tool executor — injected or created
+        if tool_executor is not None:
+            self.tool_executor = tool_executor
+        else:
+            self.tool_executor = ToolExecutor(
+                user_api_key=user_api_key,
+                user=self.user,
+                decoded_token=decoded_token,
+            )
+
         self.attachments = attachments or []
-        self.json_schema = json_schema
+        self.json_schema = None
+        if json_schema is not None:
+            try:
+                self.json_schema = normalize_json_schema_payload(json_schema)
+            except JsonSchemaValidationError as exc:
+                logger.warning("Ignoring invalid JSON schema payload: %s", exc)
         self.limited_token_mode = limited_token_mode
         self.token_limit = token_limit
         self.limited_request_mode = limited_request_mode
@@ -81,266 +115,268 @@ class BaseAgent(ABC):
     ) -> Generator[Dict, None, None]:
         pass
 
-    def _get_tools(self, api_key: str = None) -> Dict[str, Dict]:
-        mongo = MongoDB.get_client()
-        db = mongo[settings.MONGO_DB_NAME]
-        agents_collection = db["agents"]
-        tools_collection = db["user_tools"]
+    def gen_continuation(
+        self,
+        messages: List[Dict],
+        tools_dict: Dict,
+        pending_tool_calls: List[Dict],
+        tool_actions: List[Dict],
+    ) -> Generator[Dict, None, None]:
+        """Resume generation after tool actions are resolved.
 
-        agent_data = agents_collection.find_one({"key": api_key or self.user_api_key})
-        tool_ids = agent_data.get("tools", []) if agent_data else []
-
-        tools = (
-            tools_collection.find(
-                {"_id": {"$in": [ObjectId(tool_id) for tool_id in tool_ids]}}
-            )
-            if tool_ids
-            else []
-        )
-        tools = list(tools)
-        tools_by_id = {str(tool["_id"]): tool for tool in tools} if tools else {}
-
-        return tools_by_id
-
-    def _get_user_tools(self, user="local"):
-        mongo = MongoDB.get_client()
-        db = mongo[settings.MONGO_DB_NAME]
-        user_tools_collection = db["user_tools"]
-        user_tools = user_tools_collection.find({"user": user, "status": True})
-        user_tools = list(user_tools)
-
-        return {str(i): tool for i, tool in enumerate(user_tools)}
-
-    def _build_tool_parameters(self, action):
-        params = {"type": "object", "properties": {}, "required": []}
-        for param_type in ["query_params", "headers", "body", "parameters"]:
-            if param_type in action and action[param_type].get("properties"):
-                for k, v in action[param_type]["properties"].items():
-                    if v.get("filled_by_llm", True):
-                        params["properties"][k] = {
-                            key: value
-                            for key, value in v.items()
-                            if key != "filled_by_llm" and key != "value"
-                        }
-
-                        params["required"].append(k)
-        return params
-
-    def _prepare_tools(self, tools_dict):
-        self.tools = [
-            {
-                "type": "function",
-                "function": {
-                    "name": f"{action['name']}_{tool_id}",
-                    "description": action["description"],
-                    "parameters": self._build_tool_parameters(action),
-                },
-            }
-            for tool_id, tool in tools_dict.items()
-            if (
-                (tool["name"] == "api_tool" and "actions" in tool.get("config", {}))
-                or (tool["name"] != "api_tool" and "actions" in tool)
-            )
-            for action in (
-                tool["config"]["actions"].values()
-                if tool["name"] == "api_tool"
-                else tool["actions"]
-            )
-            if action.get("active", True)
-        ]
-
-    def _execute_tool_action(self, tools_dict, call):
-        parser = ToolActionParser(self.llm.__class__.__name__)
-        tool_id, action_name, call_args = parser.parse_args(call)
-
-        call_id = getattr(call, "id", None) or str(uuid.uuid4())
-
-        # Check if parsing failed
-
-        if tool_id is None or action_name is None:
-            error_message = f"Error: Failed to parse LLM tool call. Tool name: {getattr(call, 'name', 'unknown')}"
-            logger.error(error_message)
-
-            tool_call_data = {
-                "tool_name": "unknown",
-                "call_id": call_id,
-                "action_name": getattr(call, "name", "unknown"),
-                "arguments": call_args or {},
-                "result": f"Failed to parse tool call. Invalid tool name format: {getattr(call, 'name', 'unknown')}",
-            }
-            yield {"type": "tool_call", "data": {**tool_call_data, "status": "error"}}
-            self.tool_calls.append(tool_call_data)
-            return "Failed to parse tool call.", call_id
-        # Check if tool_id exists in available tools
-
-        if tool_id not in tools_dict:
-            error_message = f"Error: Tool ID '{tool_id}' extracted from LLM call not found in available tools_dict. Available IDs: {list(tools_dict.keys())}"
-            logger.error(error_message)
-
-            # Return error result
-
-            tool_call_data = {
-                "tool_name": "unknown",
-                "call_id": call_id,
-                "action_name": f"{action_name}_{tool_id}",
-                "arguments": call_args,
-                "result": f"Tool with ID {tool_id} not found. Available tools: {list(tools_dict.keys())}",
-            }
-            yield {"type": "tool_call", "data": {**tool_call_data, "status": "error"}}
-            self.tool_calls.append(tool_call_data)
-            return f"Tool with ID {tool_id} not found.", call_id
-        tool_call_data = {
-            "tool_name": tools_dict[tool_id]["name"],
-            "call_id": call_id,
-            "action_name": f"{action_name}_{tool_id}",
-            "arguments": call_args,
-        }
-        yield {"type": "tool_call", "data": {**tool_call_data, "status": "pending"}}
-
-        tool_data = tools_dict[tool_id]
-        action_data = (
-            tool_data["config"]["actions"][action_name]
-            if tool_data["name"] == "api_tool"
-            else next(
-                action
-                for action in tool_data["actions"]
-                if action["name"] == action_name
-            )
-        )
-
-        query_params, headers, body, parameters = {}, {}, {}, {}
-        param_types = {
-            "query_params": query_params,
-            "headers": headers,
-            "body": body,
-            "parameters": parameters,
-        }
-
-        for param_type, target_dict in param_types.items():
-            if param_type in action_data and action_data[param_type].get("properties"):
-                for param, details in action_data[param_type]["properties"].items():
-                    if param not in call_args and "value" in details:
-                        target_dict[param] = details["value"]
-        for param, value in call_args.items():
-            for param_type, target_dict in param_types.items():
-                if param_type in action_data and param in action_data[param_type].get(
-                    "properties", {}
-                ):
-                    target_dict[param] = value
-        tm = ToolManager(config={})
-
-        # Prepare tool_config and add tool_id for memory tools
-
-        if tool_data["name"] == "api_tool":
-            tool_config = {
-                "url": tool_data["config"]["actions"][action_name]["url"],
-                "method": tool_data["config"]["actions"][action_name]["method"],
-                "headers": headers,
-                "query_params": query_params,
-            }
-        else:
-            tool_config = tool_data["config"].copy() if tool_data["config"] else {}
-            # Add tool_id from MongoDB _id for tools that need instance isolation (like memory tool)
-            # Use MongoDB _id if available, otherwise fall back to enumerated tool_id
-
-            tool_config["tool_id"] = str(tool_data.get("_id", tool_id))
-        tool = tm.load_tool(
-            tool_data["name"],
-            tool_config=tool_config,
-            user_id=self.user,  # Pass user ID for MCP tools credential decryption
-        )
-        if tool_data["name"] == "api_tool":
-            print(
-                f"Executing api: {action_name} with query_params: {query_params}, headers: {headers}, body: {body}"
-            )
-            result = tool.execute_action(action_name, **body)
-        else:
-            print(f"Executing tool: {action_name} with args: {call_args}")
-            result = tool.execute_action(action_name, **parameters)
-        tool_call_data["result"] = (
-            f"{str(result)[:50]}..." if len(str(result)) > 50 else result
-        )
-
-        yield {"type": "tool_call", "data": {**tool_call_data, "status": "completed"}}
-        self.tool_calls.append(tool_call_data)
-
-        return result, call_id
-
-    def _get_truncated_tool_calls(self):
-        return [
-            {
-                **tool_call,
-                "result": (
-                    f"{str(tool_call['result'])[:50]}..."
-                    if len(str(tool_call["result"])) > 50
-                    else tool_call["result"]
-                ),
-                "status": "completed",
-            }
-            for tool_call in self.tool_calls
-        ]
-
-    def _calculate_current_context_tokens(self, messages: List[Dict]) -> int:
-        """
-        Calculate total tokens in current context (messages).
+        Processes the client-provided *tool_actions* (approvals, denials,
+        or client-side results), appends the resulting messages, then
+        hands back to the LLM to continue the conversation.
 
         Args:
-            messages: List of message dicts
-
-        Returns:
-            Total token count
+            messages: The saved messages array from the pause point.
+            tools_dict: The saved tools dictionary.
+            pending_tool_calls: The pending tool call descriptors from the pause.
+            tool_actions: Client-provided actions resolving the pending calls.
         """
+        self._prepare_tools(tools_dict)
+
+        actions_by_id = {a["call_id"]: a for a in tool_actions}
+
+        # Build a single assistant message containing all tool calls so
+        # the message history matches the format LLM providers expect
+        # (one assistant message with N tool_calls, followed by N tool results).
+        tc_objects: List[Dict[str, Any]] = []
+        for pending in pending_tool_calls:
+            call_id = pending["call_id"]
+            args = pending["arguments"]
+            args_str = (
+                json.dumps(args) if isinstance(args, dict) else (args or "{}")
+            )
+            tc_obj: Dict[str, Any] = {
+                "id": call_id,
+                "type": "function",
+                "function": {
+                    "name": pending["name"],
+                    "arguments": args_str,
+                },
+            }
+            if pending.get("thought_signature"):
+                tc_obj["thought_signature"] = pending["thought_signature"]
+            tc_objects.append(tc_obj)
+
+        messages.append({
+            "role": "assistant",
+            "content": None,
+            "tool_calls": tc_objects,
+        })
+
+        # Now process each pending call and append tool result messages
+        for pending in pending_tool_calls:
+            call_id = pending["call_id"]
+            args = pending["arguments"]
+            action = actions_by_id.get(call_id)
+            if not action:
+                action = {
+                    "call_id": call_id,
+                    "decision": "denied",
+                    "comment": "No response provided",
+                }
+
+            if action.get("decision") == "approved":
+                # Execute the tool server-side
+                tc = ToolCall(
+                    id=call_id,
+                    name=pending["name"],
+                    arguments=(
+                        json.dumps(args) if isinstance(args, dict) else args
+                    ),
+                )
+                tool_gen = self._execute_tool_action(tools_dict, tc)
+                tool_response = None
+                while True:
+                    try:
+                        event = next(tool_gen)
+                        yield event
+                    except StopIteration as e:
+                        tool_response, _ = e.value
+                        break
+                messages.append(
+                    self.llm_handler.create_tool_message(tc, tool_response)
+                )
+
+            elif action.get("decision") == "denied":
+                comment = action.get("comment", "")
+                denial = (
+                    f"Tool execution denied by user. Reason: {comment}"
+                    if comment
+                    else "Tool execution denied by user."
+                )
+                tc = ToolCall(
+                    id=call_id, name=pending["name"], arguments=args
+                )
+                messages.append(
+                    self.llm_handler.create_tool_message(tc, denial)
+                )
+                yield {
+                    "type": "tool_call",
+                    "data": {
+                        "tool_name": pending.get("tool_name", "unknown"),
+                        "call_id": call_id,
+                        "action_name": pending.get("llm_name", pending["name"]),
+                        "arguments": args,
+                        "status": "denied",
+                    },
+                }
+
+            elif "result" in action:
+                result = action["result"]
+                result_str = (
+                    json.dumps(result)
+                    if not isinstance(result, str)
+                    else result
+                )
+                tc = ToolCall(
+                    id=call_id, name=pending["name"], arguments=args
+                )
+                messages.append(
+                    self.llm_handler.create_tool_message(tc, result_str)
+                )
+                yield {
+                    "type": "tool_call",
+                    "data": {
+                        "tool_name": pending.get("tool_name", "unknown"),
+                        "call_id": call_id,
+                        "action_name": pending.get("llm_name", pending["name"]),
+                        "arguments": args,
+                        "result": (
+                            result_str[:50] + "..."
+                            if len(result_str) > 50
+                            else result_str
+                        ),
+                        "status": "completed",
+                    },
+                }
+
+        # Resume the LLM loop with the updated messages
+        llm_response = self._llm_gen(messages)
+        yield from self._handle_response(
+            llm_response, tools_dict, messages, None
+        )
+
+        yield {"sources": self.retrieved_docs}
+        yield {"tool_calls": self._get_truncated_tool_calls()}
+
+    # ---- Tool delegation (thin wrappers around ToolExecutor) ----
+
+    @property
+    def tool_calls(self) -> List[Dict]:
+        return self.tool_executor.tool_calls
+
+    @tool_calls.setter
+    def tool_calls(self, value: List[Dict]):
+        self.tool_executor.tool_calls = value
+
+    def _get_tools(self, api_key: str = None) -> Dict[str, Dict]:
+        return self.tool_executor._get_tools_by_api_key(api_key or self.user_api_key)
+
+    def _get_user_tools(self, user="local"):
+        return self.tool_executor._get_user_tools(user)
+
+    def _build_tool_parameters(self, action):
+        return self.tool_executor._build_tool_parameters(action)
+
+    def _prepare_tools(self, tools_dict):
+        self.tools = self.tool_executor.prepare_tools_for_llm(tools_dict)
+
+    def _execute_tool_action(self, tools_dict, call):
+        return self.tool_executor.execute(
+            tools_dict, call, self.llm.__class__.__name__
+        )
+
+    def _get_truncated_tool_calls(self):
+        return self.tool_executor.get_truncated_tool_calls()
+
+    # ---- Context / token management ----
+
+    def _calculate_current_context_tokens(self, messages: List[Dict]) -> int:
         from application.api.answer.services.compression.token_counter import (
             TokenCounter,
         )
-
         return TokenCounter.count_message_tokens(messages)
 
     def _check_context_limit(self, messages: List[Dict]) -> bool:
-        """
-        Check if we're approaching context limit (80%).
-
-        Args:
-            messages: Current message list
-
-        Returns:
-            True if at or above 80% of context limit
-        """
         from application.core.model_utils import get_token_limit
-        from application.core.settings import settings
 
         try:
-            # Calculate current tokens
             current_tokens = self._calculate_current_context_tokens(messages)
             self.current_token_count = current_tokens
-
-            # Get context limit for model
             context_limit = get_token_limit(self.model_id)
-
-            # Calculate threshold (80%)
             threshold = int(context_limit * settings.COMPRESSION_THRESHOLD_PERCENTAGE)
 
-            # Check if we've reached the limit
             if current_tokens >= threshold:
                 logger.warning(
                     f"Context limit approaching: {current_tokens}/{context_limit} tokens "
                     f"({(current_tokens/context_limit)*100:.1f}%)"
                 )
                 return True
-
             return False
-
         except Exception as e:
             logger.error(f"Error checking context limit: {str(e)}", exc_info=True)
             return False
 
+    def _validate_context_size(self, messages: List[Dict]) -> None:
+        from application.core.model_utils import get_token_limit
+
+        current_tokens = self._calculate_current_context_tokens(messages)
+        self.current_token_count = current_tokens
+        context_limit = get_token_limit(self.model_id)
+        percentage = (current_tokens / context_limit) * 100
+
+        if current_tokens >= context_limit:
+            logger.warning(
+                f"Context at limit: {current_tokens:,}/{context_limit:,} tokens "
+                f"({percentage:.1f}%). Model: {self.model_id}"
+            )
+        elif current_tokens >= int(
+            context_limit * settings.COMPRESSION_THRESHOLD_PERCENTAGE
+        ):
+            logger.info(
+                f"Context approaching limit: {current_tokens:,}/{context_limit:,} tokens "
+                f"({percentage:.1f}%)"
+            )
+
+    def _truncate_text_middle(self, text: str, max_tokens: int) -> str:
+        from application.utils import num_tokens_from_string
+
+        current_tokens = num_tokens_from_string(text)
+        if current_tokens <= max_tokens:
+            return text
+
+        chars_per_token = len(text) / current_tokens if current_tokens > 0 else 4
+        target_chars = int(max_tokens * chars_per_token * 0.95)
+
+        if target_chars <= 0:
+            return ""
+
+        start_chars = int(target_chars * 0.4)
+        end_chars = int(target_chars * 0.4)
+
+        truncation_marker = "\n\n[... content truncated to fit context limit ...]\n\n"
+        truncated = text[:start_chars] + truncation_marker + text[-end_chars:]
+
+        logger.info(
+            f"Truncated text from {current_tokens:,} to ~{max_tokens:,} tokens "
+            f"(removed middle section)"
+        )
+        return truncated
+
+    # ---- Message building ----
+
     def _build_messages(
         self,
         system_prompt: str,
         query: str,
     ) -> List[Dict]:
         """Build messages using pre-rendered system prompt"""
-        # Append compression summary to system prompt if present
+        from application.core.model_utils import get_token_limit
+        from application.utils import num_tokens_from_string
+
         if self.compressed_summary:
             compression_context = (
                 "\n\n---\n\n"
@@ -351,42 +387,119 @@ class BaseAgent(ABC):
             )
             system_prompt = system_prompt + compression_context
 
+        context_limit = get_token_limit(self.model_id)
+        system_tokens = num_tokens_from_string(system_prompt)
+
+        safety_buffer = int(context_limit * 0.1)
+        available_after_system = context_limit - system_tokens - safety_buffer
+
+        max_query_tokens = int(available_after_system * 0.8)
+        query_tokens = num_tokens_from_string(query)
+
+        if query_tokens > max_query_tokens:
+            query = self._truncate_text_middle(query, max_query_tokens)
+            query_tokens = num_tokens_from_string(query)
+
+        available_for_history = max(available_after_system - query_tokens, 0)
+
+        working_history = self._truncate_history_to_fit(
+            self.chat_history,
+            available_for_history,
+        )
+
         messages = [{"role": "system", "content": system_prompt}]
 
-        for i in self.chat_history:
+        for i in working_history:
             if "prompt" in i and "response" in i:
                 messages.append({"role": "user", "content": i["prompt"]})
                 messages.append({"role": "assistant", "content": i["response"]})
             if "tool_calls" in i:
                 for tool_call in i["tool_calls"]:
                     call_id = tool_call.get("call_id") or str(uuid.uuid4())
-
-                    function_call_dict = {
-                        "function_call": {
-                            "name": tool_call.get("action_name"),
-                            "args": tool_call.get("arguments"),
-                            "call_id": call_id,
-                        }
-                    }
-                    function_response_dict = {
-                        "function_response": {
-                            "name": tool_call.get("action_name"),
-                            "response": {"result": tool_call.get("result")},
-                            "call_id": call_id,
-                        }
-                    }
-
-                    messages.append(
-                        {"role": "assistant", "content": [function_call_dict]}
+                    args = tool_call.get("arguments")
+                    args_str = (
+                        json.dumps(args)
+                        if isinstance(args, dict)
+                        else (args or "{}")
                     )
-                    messages.append(
-                        {"role": "tool", "content": [function_response_dict]}
+                    messages.append({
+                        "role": "assistant",
+                        "content": None,
+                        "tool_calls": [{
+                            "id": call_id,
+                            "type": "function",
+                            "function": {
+                                "name": tool_call.get("action_name", ""),
+                                "arguments": args_str,
+                            },
+                        }],
+                    })
+                    result = tool_call.get("result")
+                    result_str = (
+                        json.dumps(result)
+                        if not isinstance(result, str)
+                        else (result or "")
                     )
+                    messages.append({
+                        "role": "tool",
+                        "tool_call_id": call_id,
+                        "content": result_str,
+                    })
         messages.append({"role": "user", "content": query})
         return messages
 
+    def _truncate_history_to_fit(
+        self,
+        history: List[Dict],
+        max_tokens: int,
+    ) -> List[Dict]:
+        from application.utils import num_tokens_from_string
+
+        if not history or max_tokens <= 0:
+            return []
+
+        truncated = []
+        current_tokens = 0
+
+        for message in reversed(history):
+            message_tokens = 0
+
+            if "prompt" in message and "response" in message:
+                message_tokens += num_tokens_from_string(message["prompt"])
+                message_tokens += num_tokens_from_string(message["response"])
+
+            if "tool_calls" in message:
+                for tool_call in message["tool_calls"]:
+                    tool_str = (
+                        f"Tool: {tool_call.get('tool_name')} | "
+                        f"Action: {tool_call.get('action_name')} | "
+                        f"Args: {tool_call.get('arguments')} | "
+                        f"Response: {tool_call.get('result')}"
+                    )
+                    message_tokens += num_tokens_from_string(tool_str)
+
+            if current_tokens + message_tokens <= max_tokens:
+                current_tokens += message_tokens
+                truncated.insert(0, message)
+            else:
+                break
+
+        if len(truncated) < len(history):
+            logger.info(
+                f"Truncated chat history from {len(history)} to {len(truncated)} messages "
+                f"to fit within {max_tokens:,} token budget"
+            )
+
+        return truncated
+
+    # ---- LLM generation ----
+
     def _llm_gen(self, messages: List[Dict], log_context: Optional[LogContext] = None):
+        self._validate_context_size(messages)
+
         gen_kwargs = {"model": self.model_id, "messages": messages}
+        if self.attachments:
+            gen_kwargs["_usage_attachments"] = self.attachments
 
         if (
             hasattr(self.llm, "_supports_tools")

application/agents/classic_agent.py

@@ -15,11 +15,7 @@ class ClassicAgent(BaseAgent):
     ) -> Generator[Dict, None, None]:
         """Core generator function for ClassicAgent execution flow"""
 
-        tools_dict = (
-            self._get_user_tools(self.user)
-            if not self.user_api_key
-            else self._get_tools(self.user_api_key)
-        )
+        tools_dict = self.tool_executor.get_tools()
         self._prepare_tools(tools_dict)
 
         messages = self._build_messages(self.prompt, query)

application/agents/react_agent.py

@@ -1,238 +0,0 @@
-import logging
-import os
-from typing import Any, Dict, Generator, List
-
-from application.agents.base import BaseAgent
-from application.logging import build_stack_data, LogContext
-
-logger = logging.getLogger(__name__)
-
-MAX_ITERATIONS_REASONING = 10
-
-current_dir = os.path.dirname(
-    os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-)
-with open(
-    os.path.join(current_dir, "application/prompts", "react_planning_prompt.txt"), "r"
-) as f:
-    PLANNING_PROMPT_TEMPLATE = f.read()
-with open(
-    os.path.join(current_dir, "application/prompts", "react_final_prompt.txt"), "r"
-) as f:
-    FINAL_PROMPT_TEMPLATE = f.read()
-
-
-class ReActAgent(BaseAgent):
-    """
-    Research and Action (ReAct) Agent - Advanced reasoning agent with iterative planning.
-
-    Implements a think-act-observe loop for complex problem-solving:
-    1. Creates a strategic plan based on the query
-    2. Executes tools and gathers observations
-    3. Iteratively refines approach until satisfied
-    4. Synthesizes final answer from all observations
-    """
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.plan: str = ""
-        self.observations: List[str] = []
-
-    def _gen_inner(
-        self, query: str, log_context: LogContext
-    ) -> Generator[Dict, None, None]:
-        """Execute ReAct reasoning loop with planning, action, and observation cycles"""
-
-        self._reset_state()
-
-        tools_dict = (
-            self._get_tools(self.user_api_key)
-            if self.user_api_key
-            else self._get_user_tools(self.user)
-        )
-        self._prepare_tools(tools_dict)
-
-        for iteration in range(1, MAX_ITERATIONS_REASONING + 1):
-            yield {"thought": f"Reasoning... (iteration {iteration})\n\n"}
-
-            yield from self._planning_phase(query, log_context)
-
-            if not self.plan:
-                logger.warning(
-                    f"ReActAgent: No plan generated in iteration {iteration}"
-                )
-                break
-            self.observations.append(f"Plan (iteration {iteration}): {self.plan}")
-
-            satisfied = yield from self._execution_phase(query, tools_dict, log_context)
-
-            if satisfied:
-                logger.info("ReActAgent: Goal satisfied, stopping reasoning loop")
-                break
-        yield from self._synthesis_phase(query, log_context)
-
-    def _reset_state(self):
-        """Reset agent state for new query"""
-        self.plan = ""
-        self.observations = []
-
-    def _planning_phase(
-        self, query: str, log_context: LogContext
-    ) -> Generator[Dict, None, None]:
-        """Generate strategic plan for query"""
-        logger.info("ReActAgent: Creating plan...")
-
-        plan_prompt = self._build_planning_prompt(query)
-        messages = [{"role": "user", "content": plan_prompt}]
-
-        plan_stream = self.llm.gen_stream(
-            model=self.model_id,
-            messages=messages,
-            tools=self.tools if self.tools else None,
-        )
-
-        if log_context:
-            log_context.stacks.append(
-                {"component": "planning_llm", "data": build_stack_data(self.llm)}
-            )
-        plan_parts = []
-        for chunk in plan_stream:
-            content = self._extract_content(chunk)
-            if content:
-                plan_parts.append(content)
-                yield {"thought": content}
-        self.plan = "".join(plan_parts)
-
-    def _execution_phase(
-        self, query: str, tools_dict: Dict, log_context: LogContext
-    ) -> Generator[bool, None, None]:
-        """Execute plan with tool calls and observations"""
-        execution_prompt = self._build_execution_prompt(query)
-        messages = self._build_messages(execution_prompt, query)
-
-        llm_response = self._llm_gen(messages, log_context)
-        initial_content = self._extract_content(llm_response)
-
-        if initial_content:
-            self.observations.append(f"Initial response: {initial_content}")
-        processed_response = self._llm_handler(
-            llm_response, tools_dict, messages, log_context
-        )
-
-        for tool_call in self.tool_calls:
-            observation = (
-                f"Executed: {tool_call.get('tool_name', 'Unknown')} "
-                f"with args {tool_call.get('arguments', {})}. "
-                f"Result: {str(tool_call.get('result', ''))[:200]}"
-            )
-            self.observations.append(observation)
-        final_content = self._extract_content(processed_response)
-        if final_content:
-            self.observations.append(f"Response after tools: {final_content}")
-        if log_context:
-            log_context.stacks.append(
-                {
-                    "component": "agent_tool_calls",
-                    "data": {"tool_calls": self.tool_calls.copy()},
-                }
-            )
-        yield {"sources": self.retrieved_docs}
-        yield {"tool_calls": self._get_truncated_tool_calls()}
-
-        return "SATISFIED" in (final_content or "")
-
-    def _synthesis_phase(
-        self, query: str, log_context: LogContext
-    ) -> Generator[Dict, None, None]:
-        """Synthesize final answer from all observations"""
-        logger.info("ReActAgent: Generating final answer...")
-
-        final_prompt = self._build_final_answer_prompt(query)
-        messages = [{"role": "user", "content": final_prompt}]
-
-        final_stream = self.llm.gen_stream(
-            model=self.model_id, messages=messages, tools=None
-        )
-
-        if log_context:
-            log_context.stacks.append(
-                {"component": "final_answer_llm", "data": build_stack_data(self.llm)}
-            )
-        for chunk in final_stream:
-            content = self._extract_content(chunk)
-            if content:
-                yield {"answer": content}
-
-    def _build_planning_prompt(self, query: str) -> str:
-        """Build planning phase prompt"""
-        prompt = PLANNING_PROMPT_TEMPLATE.replace("{query}", query)
-        prompt = prompt.replace("{prompt}", self.prompt or "")
-        prompt = prompt.replace("{summaries}", "")
-        prompt = prompt.replace("{observations}", "\n".join(self.observations))
-        return prompt
-
-    def _build_execution_prompt(self, query: str) -> str:
-        """Build execution phase prompt with plan and observations"""
-        observations_str = "\n".join(self.observations)
-
-        if len(observations_str) > 20000:
-            observations_str = observations_str[:20000] + "\n...[truncated]"
-        return (
-            f"{self.prompt or ''}\n\n"
-            f"Follow this plan:\n{self.plan}\n\n"
-            f"Observations:\n{observations_str}\n\n"
-            f"If sufficient data exists to answer '{query}', respond with 'SATISFIED'. "
-            f"Otherwise, continue executing the plan."
-        )
-
-    def _build_final_answer_prompt(self, query: str) -> str:
-        """Build final synthesis prompt"""
-        observations_str = "\n".join(self.observations)
-
-        if len(observations_str) > 10000:
-            observations_str = observations_str[:10000] + "\n...[truncated]"
-            logger.warning("ReActAgent: Observations truncated for final answer")
-        return FINAL_PROMPT_TEMPLATE.format(query=query, observations=observations_str)
-
-    def _extract_content(self, response: Any) -> str:
-        """Extract text content from various LLM response formats"""
-        if not response:
-            return ""
-        collected = []
-
-        if isinstance(response, str):
-            return response
-        if hasattr(response, "message") and hasattr(response.message, "content"):
-            if response.message.content:
-                return response.message.content
-        if hasattr(response, "choices") and response.choices:
-            if hasattr(response.choices[0], "message"):
-                content = response.choices[0].message.content
-                if content:
-                    return content
-        if hasattr(response, "content") and isinstance(response.content, list):
-            if response.content and hasattr(response.content[0], "text"):
-                return response.content[0].text
-        try:
-            for chunk in response:
-                content_piece = ""
-
-                if hasattr(chunk, "choices") and chunk.choices:
-                    if hasattr(chunk.choices[0], "delta"):
-                        delta_content = chunk.choices[0].delta.content
-                        if delta_content:
-                            content_piece = delta_content
-                elif hasattr(chunk, "type") and chunk.type == "content_block_delta":
-                    if hasattr(chunk, "delta") and hasattr(chunk.delta, "text"):
-                        content_piece = chunk.delta.text
-                elif isinstance(chunk, str):
-                    content_piece = chunk
-                if content_piece:
-                    collected.append(content_piece)
-        except (TypeError, AttributeError):
-            logger.debug(
-                f"Response not iterable or unexpected format: {type(response)}"
-            )
-        except Exception as e:
-            logger.error(f"Error extracting content: {e}")
-        return "".join(collected)

application/agents/research_agent.py

@@ -0,0 +1,698 @@
+import json
+import logging
+import os
+import time
+from typing import Dict, Generator, List, Optional
+
+from application.agents.base import BaseAgent
+from application.agents.tool_executor import ToolExecutor
+from application.agents.tools.internal_search import (
+    INTERNAL_TOOL_ID,
+    add_internal_search_tool,
+)
+from application.agents.tools.think import THINK_TOOL_ENTRY, THINK_TOOL_ID
+from application.logging import LogContext
+
+logger = logging.getLogger(__name__)
+
+# Defaults (can be overridden via constructor)
+DEFAULT_MAX_STEPS = 6
+DEFAULT_MAX_SUB_ITERATIONS = 5
+DEFAULT_TIMEOUT_SECONDS = 300  # 5 minutes
+DEFAULT_TOKEN_BUDGET = 100_000
+DEFAULT_PARALLEL_WORKERS = 3
+
+# Adaptive depth caps per complexity level
+COMPLEXITY_CAPS = {
+    "simple": 2,
+    "moderate": 4,
+    "complex": 6,
+}
+
+_PROMPTS_DIR = os.path.join(
+    os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
+    "prompts",
+    "research",
+)
+
+
+def _load_prompt(name: str) -> str:
+    with open(os.path.join(_PROMPTS_DIR, name), "r") as f:
+        return f.read()
+
+
+CLARIFICATION_PROMPT = _load_prompt("clarification.txt")
+PLANNING_PROMPT = _load_prompt("planning.txt")
+STEP_PROMPT = _load_prompt("step.txt")
+SYNTHESIS_PROMPT = _load_prompt("synthesis.txt")
+
+
+# ---------------------------------------------------------------------------
+# CitationManager
+# ---------------------------------------------------------------------------
+
+
+class CitationManager:
+    """Tracks and deduplicates citations across research steps."""
+
+    def __init__(self):
+        self.citations: Dict[int, Dict] = {}
+        self._counter = 0
+
+    def add(self, doc: Dict) -> int:
+        """Register a source, return its citation number. Deduplicates by source."""
+        source = doc.get("source", "")
+        title = doc.get("title", "")
+        for num, existing in self.citations.items():
+            if existing.get("source") == source and existing.get("title") == title:
+                return num
+        self._counter += 1
+        self.citations[self._counter] = doc
+        return self._counter
+
+    def add_docs(self, docs: List[Dict]) -> str:
+        """Register multiple docs, return formatted citation mapping text."""
+        mapping_lines = []
+        for doc in docs:
+            num = self.add(doc)
+            title = doc.get("title", "Untitled")
+            mapping_lines.append(f"[{num}] {title}")
+        return "\n".join(mapping_lines)
+
+    def format_references(self) -> str:
+        """Generate [N] -> source mapping for report footer."""
+        if not self.citations:
+            return "No sources found."
+        lines = []
+        for num, doc in sorted(self.citations.items()):
+            title = doc.get("title", "Untitled")
+            source = doc.get("source", "Unknown")
+            filename = doc.get("filename", "")
+            display = filename or title
+            lines.append(f"[{num}] {display} — {source}")
+        return "\n".join(lines)
+
+    def get_all_docs(self) -> List[Dict]:
+        return list(self.citations.values())
+
+
+# ---------------------------------------------------------------------------
+# ResearchAgent
+# ---------------------------------------------------------------------------
+
+
+class ResearchAgent(BaseAgent):
+    """Multi-step research agent with parallel execution and budget controls.
+
+    Orchestrates: Plan -> Research (per step, optionally parallel) -> Synthesize.
+    """
+
+    def __init__(
+        self,
+        retriever_config: Optional[Dict] = None,
+        max_steps: int = DEFAULT_MAX_STEPS,
+        max_sub_iterations: int = DEFAULT_MAX_SUB_ITERATIONS,
+        timeout_seconds: int = DEFAULT_TIMEOUT_SECONDS,
+        token_budget: int = DEFAULT_TOKEN_BUDGET,
+        parallel_workers: int = DEFAULT_PARALLEL_WORKERS,
+        *args,
+        **kwargs,
+    ):
+        super().__init__(*args, **kwargs)
+        self.retriever_config = retriever_config or {}
+        self.max_steps = max_steps
+        self.max_sub_iterations = max_sub_iterations
+        self.timeout_seconds = timeout_seconds
+        self.token_budget = token_budget
+        self.parallel_workers = parallel_workers
+        self.citations = CitationManager()
+        self._start_time: float = 0
+        self._tokens_used: int = 0
+        self._last_token_snapshot: int = 0
+
+    # ------------------------------------------------------------------
+    # Budget & timeout helpers
+    # ------------------------------------------------------------------
+
+    def _is_timed_out(self) -> bool:
+        return (time.monotonic() - self._start_time) >= self.timeout_seconds
+
+    def _elapsed(self) -> float:
+        return round(time.monotonic() - self._start_time, 1)
+
+    def _track_tokens(self, count: int):
+        self._tokens_used += count
+
+    def _budget_remaining(self) -> int:
+        return max(self.token_budget - self._tokens_used, 0)
+
+    def _is_over_budget(self) -> bool:
+        return self._tokens_used >= self.token_budget
+
+    def _snapshot_llm_tokens(self) -> int:
+        """Read current token usage from LLM and return delta since last snapshot."""
+        current = self.llm.token_usage.get("prompt_tokens", 0) + self.llm.token_usage.get("generated_tokens", 0)
+        delta = current - self._last_token_snapshot
+        self._last_token_snapshot = current
+        return delta
+
+    # ------------------------------------------------------------------
+    # Main orchestration
+    # ------------------------------------------------------------------
+
+    def _gen_inner(
+        self, query: str, log_context: LogContext
+    ) -> Generator[Dict, None, None]:
+        self._start_time = time.monotonic()
+        tools_dict = self._setup_tools()
+
+        # Phase 0: Clarification (skip if user is responding to a prior clarification)
+        if not self._is_follow_up():
+            clarification = self._clarification_phase(query)
+            if clarification:
+                yield {"metadata": {"is_clarification": True}}
+                yield {"answer": clarification}
+                yield {"sources": []}
+                yield {"tool_calls": []}
+                log_context.stacks.append(
+                    {"component": "agent", "data": {"clarification": True}}
+                )
+                return
+
+        # Phase 1: Planning (with adaptive depth)
+        yield {"type": "research_progress", "data": {"status": "planning"}}
+        plan, complexity = self._planning_phase(query)
+
+        if not plan:
+            logger.warning("ResearchAgent: Planning produced no steps, falling back")
+            plan = [{"query": query, "rationale": "Direct investigation"}]
+            complexity = "simple"
+
+        yield {
+            "type": "research_plan",
+            "data": {"steps": plan, "complexity": complexity},
+        }
+
+        # Phase 2: Research each step (yields progress events in real-time)
+        intermediate_reports = []
+        for i, step in enumerate(plan):
+            step_num = i + 1
+            step_query = step.get("query", query)
+
+            if self._is_timed_out():
+                logger.warning(
+                    f"ResearchAgent: Timeout at step {step_num}/{len(plan)} "
+                    f"({self._elapsed()}s)"
+                )
+                break
+            if self._is_over_budget():
+                logger.warning(
+                    f"ResearchAgent: Token budget exhausted at step {step_num}/{len(plan)}"
+                )
+                break
+
+            yield {
+                "type": "research_progress",
+                "data": {
+                    "step": step_num,
+                    "total": len(plan),
+                    "query": step_query,
+                    "status": "researching",
+                },
+            }
+
+            report = self._research_step(step_query, tools_dict)
+            intermediate_reports.append({"step": step, "content": report})
+
+            yield {
+                "type": "research_progress",
+                "data": {
+                    "step": step_num,
+                    "total": len(plan),
+                    "query": step_query,
+                    "status": "complete",
+                },
+            }
+
+        # Phase 3: Synthesis (streaming)
+        if self._is_timed_out():
+            logger.warning(
+                f"ResearchAgent: Timeout ({self._elapsed()}s) before synthesis, "
+                f"synthesizing with {len(intermediate_reports)} reports"
+            )
+        yield {
+            "type": "research_progress",
+            "data": {
+                "status": "synthesizing",
+                "elapsed_seconds": self._elapsed(),
+                "tokens_used": self._tokens_used,
+            },
+        }
+        yield from self._synthesis_phase(
+            query, plan, intermediate_reports, tools_dict, log_context
+        )
+
+        # Sources and tool calls
+        self.retrieved_docs = self.citations.get_all_docs()
+        yield {"sources": self.retrieved_docs}
+        yield {"tool_calls": self._get_truncated_tool_calls()}
+
+        logger.info(
+            f"ResearchAgent completed: {len(intermediate_reports)}/{len(plan)} steps, "
+            f"{self._elapsed()}s, ~{self._tokens_used} tokens"
+        )
+        log_context.stacks.append(
+            {"component": "agent", "data": {"tool_calls": self.tool_calls.copy()}}
+        )
+
+    # ------------------------------------------------------------------
+    # Tool setup
+    # ------------------------------------------------------------------
+
+    def _setup_tools(self) -> Dict:
+        """Build tools_dict with user tools + internal search + think."""
+        tools_dict = self.tool_executor.get_tools()
+
+        add_internal_search_tool(tools_dict, self.retriever_config)
+
+        think_entry = dict(THINK_TOOL_ENTRY)
+        think_entry["config"] = {}
+        tools_dict[THINK_TOOL_ID] = think_entry
+
+        self._prepare_tools(tools_dict)
+        return tools_dict
+
+    # ------------------------------------------------------------------
+    # Phase 0: Clarification
+    # ------------------------------------------------------------------
+
+    def _is_follow_up(self) -> bool:
+        """Check if the user is responding to a prior clarification.
+
+        Uses the metadata flag stored in the conversation DB — no string matching.
+        Only skip clarification when the last query was explicitly flagged
+        as a clarification by this agent.
+        """
+        if not self.chat_history:
+            return False
+        last = self.chat_history[-1]
+        meta = last.get("metadata", {})
+        return bool(meta.get("is_clarification"))
+
+    def _clarification_phase(self, question: str) -> Optional[str]:
+        """Ask the LLM whether the question needs clarification.
+
+        Returns formatted clarification text if needed, or None to proceed.
+        Uses response_format to force valid JSON output.
+        """
+        messages = [
+            {"role": "system", "content": CLARIFICATION_PROMPT},
+            {"role": "user", "content": question},
+        ]
+
+        try:
+            response = self.llm.gen(
+                model=self.model_id,
+                messages=messages,
+                tools=None,
+                response_format={"type": "json_object"},
+            )
+            text = self._extract_text(response)
+            self._track_tokens(self._snapshot_llm_tokens())
+            logger.info(f"ResearchAgent clarification response: {text[:300]}")
+
+            data = self._parse_clarification_json(text)
+            if not data or not data.get("needs_clarification"):
+                return None
+
+            questions = data.get("questions", [])
+            if not questions:
+                return None
+
+            # Format as a friendly response
+            lines = [
+                "Before I begin researching, I'd like to clarify a few things:\n"
+            ]
+            for i, q in enumerate(questions[:3], 1):
+                lines.append(f"{i}. {q}")
+            lines.append(
+                "\nPlease provide these details and I'll start the research."
+            )
+            return "\n".join(lines)
+
+        except Exception as e:
+            logger.error(f"Clarification phase failed: {e}", exc_info=True)
+            return None  # proceed with research on failure
+
+    def _parse_clarification_json(self, text: str) -> Optional[Dict]:
+        """Parse clarification JSON from LLM response."""
+        try:
+            return json.loads(text)
+        except json.JSONDecodeError:
+            pass
+
+        # Try extracting from code fences
+        for marker in ["```json", "```"]:
+            if marker in text:
+                start = text.index(marker) + len(marker)
+                end = text.index("```", start) if "```" in text[start:] else len(text)
+                try:
+                    return json.loads(text[start:end].strip())
+                except (json.JSONDecodeError, ValueError):
+                    pass
+
+        # Try finding JSON object
+        for i, ch in enumerate(text):
+            if ch == "{":
+                for j in range(len(text) - 1, i, -1):
+                    if text[j] == "}":
+                        try:
+                            return json.loads(text[i : j + 1])
+                        except json.JSONDecodeError:
+                            continue
+                break
+
+        return None
+
+    # ------------------------------------------------------------------
+    # Phase 1: Planning (with adaptive depth)
+    # ------------------------------------------------------------------
+
+    def _planning_phase(self, question: str) -> tuple[List[Dict], str]:
+        """Decompose the question into research steps via LLM.
+
+        Returns (steps, complexity) where complexity is simple/moderate/complex.
+        """
+        messages = [
+            {"role": "system", "content": PLANNING_PROMPT},
+            {"role": "user", "content": question},
+        ]
+
+        try:
+            response = self.llm.gen(
+                model=self.model_id,
+                messages=messages,
+                tools=None,
+                response_format={"type": "json_object"},
+            )
+            text = self._extract_text(response)
+            self._track_tokens(self._snapshot_llm_tokens())
+            logger.info(f"ResearchAgent planning LLM response: {text[:500]}")
+
+            plan_data = self._parse_plan_json(text)
+            if isinstance(plan_data, dict):
+                complexity = plan_data.get("complexity", "moderate")
+                steps = plan_data.get("steps", [])
+            else:
+                complexity = "moderate"
+                steps = plan_data
+
+            # Adaptive depth: cap steps based on assessed complexity
+            cap = COMPLEXITY_CAPS.get(complexity, self.max_steps)
+            cap = min(cap, self.max_steps)
+            steps = steps[:cap]
+
+            logger.info(
+                f"ResearchAgent plan: complexity={complexity}, "
+                f"steps={len(steps)} (cap={cap})"
+            )
+            return steps, complexity
+
+        except Exception as e:
+            logger.error(f"Planning phase failed: {e}", exc_info=True)
+            return (
+                [{"query": question, "rationale": "Direct investigation (planning failed)"}],
+                "simple",
+            )
+
+    def _parse_plan_json(self, text: str):
+        """Extract JSON plan from LLM response. Returns dict or list."""
+        # Try direct parse
+        try:
+            data = json.loads(text)
+            if isinstance(data, dict) and "steps" in data:
+                return data
+            if isinstance(data, list):
+                return data
+        except json.JSONDecodeError:
+            pass
+
+        # Try extracting from markdown code fences
+        for marker in ["```json", "```"]:
+            if marker in text:
+                start = text.index(marker) + len(marker)
+                end = text.index("```", start) if "```" in text[start:] else len(text)
+                try:
+                    data = json.loads(text[start:end].strip())
+                    if isinstance(data, dict) and "steps" in data:
+                        return data
+                    if isinstance(data, list):
+                        return data
+                except (json.JSONDecodeError, ValueError):
+                    pass
+
+        # Try finding JSON object in text
+        for i, ch in enumerate(text):
+            if ch == "{":
+                for j in range(len(text) - 1, i, -1):
+                    if text[j] == "}":
+                        try:
+                            data = json.loads(text[i : j + 1])
+                            if isinstance(data, dict) and "steps" in data:
+                                return data
+                        except json.JSONDecodeError:
+                            continue
+                break
+
+        logger.warning(f"Could not parse plan JSON from: {text[:200]}")
+        return []
+
+    # ------------------------------------------------------------------
+    # Phase 2: Research step (core loop)
+    # ------------------------------------------------------------------
+
+    def _research_step(self, step_query: str, tools_dict: Dict) -> str:
+        """Run a focused research loop for one sub-question (sequential path)."""
+        report = self._research_step_with_executor(
+            step_query, tools_dict, self.tool_executor
+        )
+        self._collect_step_sources()
+        return report
+
+    def _research_step_with_executor(
+        self, step_query: str, tools_dict: Dict, executor: ToolExecutor
+    ) -> str:
+        """Core research loop. Works with any ToolExecutor instance."""
+        system_prompt = STEP_PROMPT.replace("{step_query}", step_query)
+        messages = [
+            {"role": "system", "content": system_prompt},
+            {"role": "user", "content": step_query},
+        ]
+
+        last_search_empty = False
+
+        for iteration in range(self.max_sub_iterations):
+            # Check timeout and budget
+            if self._is_timed_out():
+                logger.info(
+                    f"Research step '{step_query[:50]}' timed out at iteration {iteration}"
+                )
+                break
+            if self._is_over_budget():
+                logger.info(
+                    f"Research step '{step_query[:50]}' hit token budget at iteration {iteration}"
+                )
+                break
+
+            try:
+                response = self.llm.gen(
+                    model=self.model_id,
+                    messages=messages,
+                    tools=self.tools if self.tools else None,
+                )
+                self._track_tokens(self._snapshot_llm_tokens())
+            except Exception as e:
+                logger.error(
+                    f"Research step LLM call failed (iteration {iteration}): {e}",
+                    exc_info=True,
+                )
+                break
+
+            parsed = self.llm_handler.parse_response(response)
+
+            if not parsed.requires_tool_call:
+                return parsed.content or "No findings for this step."
+
+            # Execute tool calls
+            messages, last_search_empty = self._execute_step_tools_with_refinement(
+                parsed.tool_calls, tools_dict, messages, executor, last_search_empty
+            )
+
+        # Max iterations / timeout / budget — ask for summary
+        messages.append(
+            {
+                "role": "user",
+                "content": "Please summarize your findings so far based on the information gathered.",
+            }
+        )
+        try:
+            response = self.llm.gen(
+                model=self.model_id, messages=messages, tools=None
+            )
+            self._track_tokens(self._snapshot_llm_tokens())
+            text = self._extract_text(response)
+            return text or "Research step completed."
+        except Exception:
+            return "Research step completed."
+
+    def _execute_step_tools_with_refinement(
+        self,
+        tool_calls,
+        tools_dict: Dict,
+        messages: List[Dict],
+        executor: ToolExecutor,
+        last_search_empty: bool,
+    ) -> tuple[List[Dict], bool]:
+        """Execute tool calls with query refinement on empty results.
+
+        Returns (updated_messages, was_last_search_empty).
+        """
+        search_returned_empty = False
+
+        for call in tool_calls:
+            gen = executor.execute(
+                tools_dict, call, self.llm.__class__.__name__
+            )
+            result = None
+            call_id = None
+            while True:
+                try:
+                    event = next(gen)
+                    # Log tool_call status events instead of discarding them
+                    if isinstance(event, dict) and event.get("type") == "tool_call":
+                        logger.debug(
+                            "Tool %s status: %s",
+                            event.get("data", {}).get("action_name", ""),
+                            event.get("data", {}).get("status", ""),
+                        )
+                except StopIteration as e:
+                    result, call_id = e.value
+                    break
+
+            # Detect empty search results for refinement
+            is_search = "search" in (call.name or "").lower()
+            result_str = str(result) if result else ""
+            if is_search and "No documents found" in result_str:
+                search_returned_empty = True
+                if last_search_empty:
+                    # Two consecutive empty searches — inject refinement hint
+                    result_str += (
+                        "\n\nHint: Previous search also returned no results. "
+                        "Try a very different query with different keywords, "
+                        "or broaden your search terms."
+                    )
+                    result = result_str
+
+            import json as _json
+
+            args_str = (
+                _json.dumps(call.arguments)
+                if isinstance(call.arguments, dict)
+                else call.arguments
+            )
+            messages.append({
+                "role": "assistant",
+                "content": None,
+                "tool_calls": [{
+                    "id": call_id,
+                    "type": "function",
+                    "function": {"name": call.name, "arguments": args_str},
+                }],
+            })
+            tool_message = self.llm_handler.create_tool_message(call, result)
+            messages.append(tool_message)
+
+        return messages, search_returned_empty
+
+    def _collect_step_sources(self):
+        """Collect sources from InternalSearchTool and register with CitationManager."""
+        cache_key = f"internal_search:{INTERNAL_TOOL_ID}:{self.user or ''}"
+        tool = self.tool_executor._loaded_tools.get(cache_key)
+        if tool and hasattr(tool, "retrieved_docs"):
+            for doc in tool.retrieved_docs:
+                self.citations.add(doc)
+
+    # ------------------------------------------------------------------
+    # Phase 3: Synthesis
+    # ------------------------------------------------------------------
+
+    def _synthesis_phase(
+        self,
+        question: str,
+        plan: List[Dict],
+        intermediate_reports: List[Dict],
+        tools_dict: Dict,
+        log_context: LogContext,
+    ) -> Generator[Dict, None, None]:
+        """Compile all findings into a final cited report (streaming)."""
+        plan_lines = []
+        for i, step in enumerate(plan, 1):
+            plan_lines.append(
+                f"{i}. {step.get('query', 'Unknown')} — {step.get('rationale', '')}"
+            )
+        plan_summary = "\n".join(plan_lines)
+
+        findings_parts = []
+        for i, report in enumerate(intermediate_reports, 1):
+            step_query = report["step"].get("query", "Unknown")
+            content = report["content"]
+            findings_parts.append(
+                f"--- Step {i}: {step_query} ---\n{content}"
+            )
+        findings = "\n\n".join(findings_parts)
+
+        references = self.citations.format_references()
+
+        synthesis_prompt = SYNTHESIS_PROMPT.replace("{question}", question)
+        synthesis_prompt = synthesis_prompt.replace("{plan_summary}", plan_summary)
+        synthesis_prompt = synthesis_prompt.replace("{findings}", findings)
+        synthesis_prompt = synthesis_prompt.replace("{references}", references)
+
+        messages = [
+            {"role": "system", "content": synthesis_prompt},
+            {"role": "user", "content": f"Please write the research report for: {question}"},
+        ]
+
+        llm_response = self.llm.gen_stream(
+            model=self.model_id, messages=messages, tools=None
+        )
+
+        if log_context:
+            from application.logging import build_stack_data
+
+            log_context.stacks.append(
+                {"component": "synthesis_llm", "data": build_stack_data(self.llm)}
+            )
+
+        yield from self._handle_response(
+            llm_response, tools_dict, messages, log_context
+        )
+
+    # ------------------------------------------------------------------
+    # Helpers
+    # ------------------------------------------------------------------
+
+    def _extract_text(self, response) -> str:
+        """Extract text content from a non-streaming LLM response."""
+        if isinstance(response, str):
+            return response
+        if hasattr(response, "message") and hasattr(response.message, "content"):
+            return response.message.content or ""
+        if hasattr(response, "choices") and response.choices:
+            choice = response.choices[0]
+            if hasattr(choice, "message") and hasattr(choice.message, "content"):
+                return choice.message.content or ""
+        if hasattr(response, "content") and isinstance(response.content, list):
+            if response.content and hasattr(response.content[0], "text"):
+                return response.content[0].text or ""
+        return str(response) if response else ""

application/agents/tool_executor.py

@@ -0,0 +1,477 @@
+import logging
+import uuid
+from collections import Counter
+from typing import Dict, List, Optional, Tuple
+
+from bson.objectid import ObjectId
+
+from application.agents.tools.tool_action_parser import ToolActionParser
+from application.agents.tools.tool_manager import ToolManager
+from application.core.mongo_db import MongoDB
+from application.core.settings import settings
+from application.security.encryption import decrypt_credentials
+
+logger = logging.getLogger(__name__)
+
+
+class ToolExecutor:
+    """Handles tool discovery, preparation, and execution.
+
+    Extracted from BaseAgent to separate concerns and enable tool caching.
+    """
+
+    def __init__(
+        self,
+        user_api_key: Optional[str] = None,
+        user: Optional[str] = None,
+        decoded_token: Optional[Dict] = None,
+    ):
+        self.user_api_key = user_api_key
+        self.user = user
+        self.decoded_token = decoded_token
+        self.tool_calls: List[Dict] = []
+        self._loaded_tools: Dict[str, object] = {}
+        self.conversation_id: Optional[str] = None
+        self.client_tools: Optional[List[Dict]] = None
+        self._name_to_tool: Dict[str, Tuple[str, str]] = {}
+        self._tool_to_name: Dict[Tuple[str, str], str] = {}
+
+    def get_tools(self) -> Dict[str, Dict]:
+        """Load tool configs from DB based on user context.
+
+        If *client_tools* have been set on this executor, they are
+        automatically merged into the returned dict.
+        """
+        if self.user_api_key:
+            tools = self._get_tools_by_api_key(self.user_api_key)
+        else:
+            tools = self._get_user_tools(self.user or "local")
+        if self.client_tools:
+            self.merge_client_tools(tools, self.client_tools)
+        return tools
+
+    def _get_tools_by_api_key(self, api_key: str) -> Dict[str, Dict]:
+        mongo = MongoDB.get_client()
+        db = mongo[settings.MONGO_DB_NAME]
+        agents_collection = db["agents"]
+        tools_collection = db["user_tools"]
+
+        agent_data = agents_collection.find_one({"key": api_key})
+        tool_ids = agent_data.get("tools", []) if agent_data else []
+
+        tools = (
+            tools_collection.find(
+                {"_id": {"$in": [ObjectId(tool_id) for tool_id in tool_ids]}}
+            )
+            if tool_ids
+            else []
+        )
+        tools = list(tools)
+        return {str(tool["_id"]): tool for tool in tools} if tools else {}
+
+    def _get_user_tools(self, user: str = "local") -> Dict[str, Dict]:
+        mongo = MongoDB.get_client()
+        db = mongo[settings.MONGO_DB_NAME]
+        user_tools_collection = db["user_tools"]
+        user_tools = user_tools_collection.find({"user": user, "status": True})
+        user_tools = list(user_tools)
+        return {str(i): tool for i, tool in enumerate(user_tools)}
+
+    def merge_client_tools(
+        self, tools_dict: Dict, client_tools: List[Dict]
+    ) -> Dict:
+        """Merge client-provided tool definitions into tools_dict.
+
+        Client tools use the standard function-calling format::
+
+            [{"type": "function", "function": {"name": "get_weather",
+              "description": "...", "parameters": {...}}}]
+
+        They are stored in *tools_dict* with ``client_side: True`` so that
+        :meth:`check_pause` returns a pause signal instead of trying to
+        execute them server-side.
+
+        Args:
+            tools_dict: The mutable server tools dict (will be modified in place).
+            client_tools: List of tool definitions in function-calling format.
+
+        Returns:
+            The updated *tools_dict* (same reference, for convenience).
+        """
+        for i, ct in enumerate(client_tools):
+            func = ct.get("function", ct)  # tolerate bare {"name":..} too
+            name = func.get("name", f"clienttool{i}")
+            tool_id = f"ct{i}"
+
+            tools_dict[tool_id] = {
+                "name": name,
+                "client_side": True,
+                "actions": [
+                    {
+                        "name": name,
+                        "description": func.get("description", ""),
+                        "active": True,
+                        "parameters": func.get("parameters", {}),
+                    }
+                ],
+            }
+        return tools_dict
+
+    def prepare_tools_for_llm(self, tools_dict: Dict) -> List[Dict]:
+        """Convert tool configs to LLM function schemas.
+
+        Action names are kept clean for the LLM:
+        - Unique action names appear as-is (e.g. ``get_weather``).
+        - Duplicate action names get numbered suffixes (e.g. ``search_1``,
+          ``search_2``).
+
+        A reverse mapping is stored in ``_name_to_tool`` so that tool calls
+        can be routed back to the correct ``(tool_id, action_name)`` without
+        brittle string splitting.
+        """
+        # Pass 1: collect entries and count action name occurrences
+        entries: List[Tuple[str, str, Dict, bool]] = []  # (tool_id, action_name, action, is_client)
+        name_counts: Counter = Counter()
+
+        for tool_id, tool in tools_dict.items():
+            is_api = tool["name"] == "api_tool"
+            is_client = tool.get("client_side", False)
+
+            if is_api and "actions" not in tool.get("config", {}):
+                continue
+            if not is_api and "actions" not in tool:
+                continue
+
+            actions = (
+                tool["config"]["actions"].values()
+                if is_api
+                else tool["actions"]
+            )
+
+            for action in actions:
+                if not action.get("active", True):
+                    continue
+                entries.append((tool_id, action["name"], action, is_client))
+                name_counts[action["name"]] += 1
+
+        # Pass 2: assign LLM-visible names and build mappings
+        self._name_to_tool = {}
+        self._tool_to_name = {}
+        collision_counters: Dict[str, int] = {}
+        all_llm_names: set = set()
+
+        result = []
+        for tool_id, action_name, action, is_client in entries:
+            if name_counts[action_name] == 1:
+                llm_name = action_name
+            else:
+                counter = collision_counters.get(action_name, 1)
+                candidate = f"{action_name}_{counter}"
+                # Skip if candidate collides with a unique action name
+                while candidate in all_llm_names or (
+                    candidate in name_counts and name_counts[candidate] == 1
+                ):
+                    counter += 1
+                    candidate = f"{action_name}_{counter}"
+                collision_counters[action_name] = counter + 1
+                llm_name = candidate
+
+            all_llm_names.add(llm_name)
+            self._name_to_tool[llm_name] = (tool_id, action_name)
+            self._tool_to_name[(tool_id, action_name)] = llm_name
+
+            if is_client:
+                params = action.get("parameters", {})
+            else:
+                params = self._build_tool_parameters(action)
+
+            result.append({
+                "type": "function",
+                "function": {
+                    "name": llm_name,
+                    "description": action.get("description", ""),
+                    "parameters": params,
+                },
+            })
+        return result
+
+    def _build_tool_parameters(self, action: Dict) -> Dict:
+        params = {"type": "object", "properties": {}, "required": []}
+        for param_type in ["query_params", "headers", "body", "parameters"]:
+            if param_type in action and action[param_type].get("properties"):
+                for k, v in action[param_type]["properties"].items():
+                    if v.get("filled_by_llm", True):
+                        params["properties"][k] = {
+                            key: value
+                            for key, value in v.items()
+                            if key not in ("filled_by_llm", "value", "required")
+                        }
+                        if v.get("required", False):
+                            params["required"].append(k)
+        return params
+
+    def check_pause(
+        self, tools_dict: Dict, call, llm_class_name: str
+    ) -> Optional[Dict]:
+        """Check if a tool call requires pausing for approval or client execution.
+
+        Returns a dict describing the pending action if pause is needed, None otherwise.
+        """
+        parser = ToolActionParser(llm_class_name, name_mapping=self._name_to_tool)
+        tool_id, action_name, call_args = parser.parse_args(call)
+        call_id = getattr(call, "id", None) or str(uuid.uuid4())
+        llm_name = getattr(call, "name", "")
+
+        if tool_id is None or action_name is None or tool_id not in tools_dict:
+            return None  # Will be handled as error by execute()
+
+        tool_data = tools_dict[tool_id]
+
+        # Client-side tools
+        if tool_data.get("client_side"):
+            return {
+                "call_id": call_id,
+                "name": llm_name,
+                "tool_name": tool_data.get("name", "unknown"),
+                "tool_id": tool_id,
+                "action_name": action_name,
+                "llm_name": llm_name,
+                "arguments": call_args if isinstance(call_args, dict) else {},
+                "pause_type": "requires_client_execution",
+                "thought_signature": getattr(call, "thought_signature", None),
+            }
+
+        # Approval required
+        if tool_data["name"] == "api_tool":
+            action_data = tool_data.get("config", {}).get("actions", {}).get(
+                action_name, {}
+            )
+        else:
+            action_data = next(
+                (a for a in tool_data.get("actions", []) if a["name"] == action_name),
+                {},
+            )
+
+        if action_data.get("require_approval"):
+            return {
+                "call_id": call_id,
+                "name": llm_name,
+                "tool_name": tool_data.get("name", "unknown"),
+                "tool_id": tool_id,
+                "action_name": action_name,
+                "llm_name": llm_name,
+                "arguments": call_args if isinstance(call_args, dict) else {},
+                "pause_type": "awaiting_approval",
+                "thought_signature": getattr(call, "thought_signature", None),
+            }
+
+        return None
+
+    def execute(self, tools_dict: Dict, call, llm_class_name: str):
+        """Execute a tool call. Yields status events, returns (result, call_id)."""
+        parser = ToolActionParser(llm_class_name, name_mapping=self._name_to_tool)
+        tool_id, action_name, call_args = parser.parse_args(call)
+        llm_name = getattr(call, "name", "unknown")
+
+        call_id = getattr(call, "id", None) or str(uuid.uuid4())
+
+        if tool_id is None or action_name is None:
+            error_message = f"Error: Failed to parse LLM tool call. Tool name: {llm_name}"
+            logger.error(error_message)
+
+            tool_call_data = {
+                "tool_name": "unknown",
+                "call_id": call_id,
+                "action_name": llm_name,
+                "arguments": call_args or {},
+                "result": f"Failed to parse tool call. Invalid tool name format: {llm_name}",
+            }
+            yield {"type": "tool_call", "data": {**tool_call_data, "status": "error"}}
+            self.tool_calls.append(tool_call_data)
+            return "Failed to parse tool call.", call_id
+
+        if tool_id not in tools_dict:
+            error_message = f"Error: Tool ID '{tool_id}' extracted from LLM call not found in available tools_dict. Available IDs: {list(tools_dict.keys())}"
+            logger.error(error_message)
+
+            tool_call_data = {
+                "tool_name": "unknown",
+                "call_id": call_id,
+                "action_name": llm_name,
+                "arguments": call_args,
+                "result": f"Tool with ID {tool_id} not found. Available tools: {list(tools_dict.keys())}",
+            }
+            yield {"type": "tool_call", "data": {**tool_call_data, "status": "error"}}
+            self.tool_calls.append(tool_call_data)
+            return f"Tool with ID {tool_id} not found.", call_id
+
+        tool_call_data = {
+            "tool_name": tools_dict[tool_id]["name"],
+            "call_id": call_id,
+            "action_name": llm_name,
+            "arguments": call_args,
+        }
+        yield {"type": "tool_call", "data": {**tool_call_data, "status": "pending"}}
+
+        tool_data = tools_dict[tool_id]
+        action_data = (
+            tool_data["config"]["actions"][action_name]
+            if tool_data["name"] == "api_tool"
+            else next(
+                action
+                for action in tool_data["actions"]
+                if action["name"] == action_name
+            )
+        )
+
+        query_params, headers, body, parameters = {}, {}, {}, {}
+        param_types = {
+            "query_params": query_params,
+            "headers": headers,
+            "body": body,
+            "parameters": parameters,
+        }
+
+        for param_type, target_dict in param_types.items():
+            if param_type in action_data and action_data[param_type].get("properties"):
+                for param, details in action_data[param_type]["properties"].items():
+                    if (
+                        param not in call_args
+                        and "value" in details
+                        and details["value"]
+                    ):
+                        target_dict[param] = details["value"]
+        for param, value in call_args.items():
+            for param_type, target_dict in param_types.items():
+                if param_type in action_data and param in action_data[param_type].get(
+                    "properties", {}
+                ):
+                    target_dict[param] = value
+
+        # Load tool (with caching)
+        tool = self._get_or_load_tool(
+            tool_data, tool_id, action_name,
+            headers=headers, query_params=query_params,
+        )
+
+        resolved_arguments = (
+            {"query_params": query_params, "headers": headers, "body": body}
+            if tool_data["name"] == "api_tool"
+            else parameters
+        )
+        if tool_data["name"] == "api_tool":
+            logger.debug(
+                f"Executing api: {action_name} with query_params: {query_params}, headers: {headers}, body: {body}"
+            )
+            result = tool.execute_action(action_name, **body)
+        else:
+            logger.debug(f"Executing tool: {action_name} with args: {call_args}")
+            result = tool.execute_action(action_name, **parameters)
+
+        get_artifact_id = (
+            getattr(tool, "get_artifact_id", None)
+            if tool_data["name"] != "api_tool"
+            else None
+        )
+
+        artifact_id = None
+        if callable(get_artifact_id):
+            try:
+                artifact_id = get_artifact_id(action_name, **parameters)
+            except Exception:
+                logger.exception(
+                    "Failed to extract artifact_id from tool %s for action %s",
+                    tool_data["name"],
+                    action_name,
+                )
+
+        artifact_id = str(artifact_id).strip() if artifact_id is not None else ""
+        if artifact_id:
+            tool_call_data["artifact_id"] = artifact_id
+        result_full = str(result)
+        tool_call_data["resolved_arguments"] = resolved_arguments
+        tool_call_data["result_full"] = result_full
+        tool_call_data["result"] = (
+            f"{result_full[:50]}..." if len(result_full) > 50 else result_full
+        )
+
+        stream_tool_call_data = {
+            key: value
+            for key, value in tool_call_data.items()
+            if key not in {"result_full", "resolved_arguments"}
+        }
+        yield {"type": "tool_call", "data": {**stream_tool_call_data, "status": "completed"}}
+        self.tool_calls.append(tool_call_data)
+
+        return result, call_id
+
+    def _get_or_load_tool(
+        self, tool_data: Dict, tool_id: str, action_name: str,
+        headers: Optional[Dict] = None, query_params: Optional[Dict] = None,
+    ):
+        """Load a tool, using cache when possible."""
+        cache_key = f"{tool_data['name']}:{tool_id}:{self.user or ''}"
+        if cache_key in self._loaded_tools:
+            return self._loaded_tools[cache_key]
+
+        tm = ToolManager(config={})
+
+        if tool_data["name"] == "api_tool":
+            action_config = tool_data["config"]["actions"][action_name]
+            tool_config = {
+                "url": action_config["url"],
+                "method": action_config["method"],
+                "headers": headers or {},
+                "query_params": query_params or {},
+            }
+            if "body_content_type" in action_config:
+                tool_config["body_content_type"] = action_config.get(
+                    "body_content_type", "application/json"
+                )
+                tool_config["body_encoding_rules"] = action_config.get(
+                    "body_encoding_rules", {}
+                )
+        else:
+            tool_config = tool_data["config"].copy() if tool_data["config"] else {}
+            if tool_config.get("encrypted_credentials") and self.user:
+                decrypted = decrypt_credentials(
+                    tool_config["encrypted_credentials"], self.user
+                )
+                tool_config.update(decrypted)
+                tool_config["auth_credentials"] = decrypted
+                tool_config.pop("encrypted_credentials", None)
+            tool_config["tool_id"] = str(tool_data.get("_id", tool_id))
+            if self.conversation_id:
+                tool_config["conversation_id"] = self.conversation_id
+            if tool_data["name"] == "mcp_tool":
+                tool_config["query_mode"] = True
+
+        tool = tm.load_tool(
+            tool_data["name"],
+            tool_config=tool_config,
+            user_id=self.user,
+        )
+
+        # Don't cache api_tool since config varies by action
+        if tool_data["name"] != "api_tool":
+            self._loaded_tools[cache_key] = tool
+
+        return tool
+
+    def get_truncated_tool_calls(self) -> List[Dict]:
+        return [
+            {
+                "tool_name": tool_call.get("tool_name"),
+                "call_id": tool_call.get("call_id"),
+                "action_name": tool_call.get("action_name"),
+                "arguments": tool_call.get("arguments"),
+                "artifact_id": tool_call.get("artifact_id"),
+                "result": (
+                    f"{str(tool_call['result'])[:50]}..."
+                    if len(str(tool_call["result"])) > 50
+                    else tool_call["result"]
+                ),
+                "status": "completed",
+            }
+            for tool_call in self.tool_calls
+        ]

application/agents/tools/api_body_serializer.py

@@ -0,0 +1,323 @@
+import base64
+import json
+import logging
+from enum import Enum
+from typing import Any, Dict, Optional, Union
+from urllib.parse import quote, urlencode
+
+logger = logging.getLogger(__name__)
+
+
+class ContentType(str, Enum):
+    """Supported content types for request bodies."""
+
+    JSON = "application/json"
+    FORM_URLENCODED = "application/x-www-form-urlencoded"
+    MULTIPART_FORM_DATA = "multipart/form-data"
+    TEXT_PLAIN = "text/plain"
+    XML = "application/xml"
+    OCTET_STREAM = "application/octet-stream"
+
+
+class RequestBodySerializer:
+    """Serializes request bodies according to content-type and OpenAPI 3.1 spec."""
+
+    @staticmethod
+    def serialize(
+        body_data: Dict[str, Any],
+        content_type: str = ContentType.JSON,
+        encoding_rules: Optional[Dict[str, Dict[str, Any]]] = None,
+    ) -> tuple[Union[str, bytes], Dict[str, str]]:
+        """
+        Serialize body data to appropriate format.
+
+        Args:
+            body_data: Dictionary of body parameters
+            content_type: Content-Type header value
+            encoding_rules: OpenAPI Encoding Object rules per field
+
+        Returns:
+            Tuple of (serialized_body, updated_headers_dict)
+
+        Raises:
+            ValueError: If serialization fails
+        """
+        if not body_data:
+            return None, {}
+
+        try:
+            content_type_lower = content_type.lower().split(";")[0].strip()
+
+            if content_type_lower == ContentType.JSON:
+                return RequestBodySerializer._serialize_json(body_data)
+
+            elif content_type_lower == ContentType.FORM_URLENCODED:
+                return RequestBodySerializer._serialize_form_urlencoded(
+                    body_data, encoding_rules
+                )
+
+            elif content_type_lower == ContentType.MULTIPART_FORM_DATA:
+                return RequestBodySerializer._serialize_multipart_form_data(
+                    body_data, encoding_rules
+                )
+
+            elif content_type_lower == ContentType.TEXT_PLAIN:
+                return RequestBodySerializer._serialize_text_plain(body_data)
+
+            elif content_type_lower == ContentType.XML:
+                return RequestBodySerializer._serialize_xml(body_data)
+
+            elif content_type_lower == ContentType.OCTET_STREAM:
+                return RequestBodySerializer._serialize_octet_stream(body_data)
+
+            else:
+                logger.warning(
+                    f"Unknown content type: {content_type}, treating as JSON"
+                )
+                return RequestBodySerializer._serialize_json(body_data)
+
+        except Exception as e:
+            logger.error(f"Error serializing body: {str(e)}", exc_info=True)
+            raise ValueError(f"Failed to serialize request body: {str(e)}")
+
+    @staticmethod
+    def _serialize_json(body_data: Dict[str, Any]) -> tuple[str, Dict[str, str]]:
+        """Serialize body as JSON per OpenAPI spec."""
+        try:
+            serialized = json.dumps(
+                body_data, separators=(",", ":"), ensure_ascii=False
+            )
+            headers = {"Content-Type": ContentType.JSON.value}
+            return serialized, headers
+        except (TypeError, ValueError) as e:
+            raise ValueError(f"Failed to serialize JSON body: {str(e)}")
+
+    @staticmethod
+    def _serialize_form_urlencoded(
+        body_data: Dict[str, Any],
+        encoding_rules: Optional[Dict[str, Dict[str, Any]]] = None,
+    ) -> tuple[str, Dict[str, str]]:
+        """Serialize body as application/x-www-form-urlencoded per RFC1866/RFC3986."""
+        encoding_rules = encoding_rules or {}
+        params = []
+
+        for key, value in body_data.items():
+            if value is None:
+                continue
+
+            rule = encoding_rules.get(key, {})
+            style = rule.get("style", "form")
+            explode = rule.get("explode", style == "form")
+            content_type = rule.get("contentType", "text/plain")
+
+            serialized_value = RequestBodySerializer._serialize_form_value(
+                value, style, explode, content_type, key
+            )
+
+            if isinstance(serialized_value, list):
+                for sv in serialized_value:
+                    params.append((key, sv))
+            else:
+                params.append((key, serialized_value))
+
+        # Use standard urlencode (replaces space with +)
+        serialized = urlencode(params, safe="")
+        headers = {"Content-Type": ContentType.FORM_URLENCODED.value}
+        return serialized, headers
+
+    @staticmethod
+    def _serialize_form_value(
+        value: Any, style: str, explode: bool, content_type: str, key: str
+    ) -> Union[str, list]:
+        """Serialize individual form value with encoding rules."""
+        if isinstance(value, dict):
+            if content_type == "application/json":
+                return json.dumps(value, separators=(",", ":"))
+            elif content_type == "application/xml":
+                return RequestBodySerializer._dict_to_xml(value)
+            else:
+                if style == "deepObject" and explode:
+                    return [
+                        f"{RequestBodySerializer._percent_encode(str(v))}"
+                        for v in value.values()
+                    ]
+                elif explode:
+                    return [
+                        f"{RequestBodySerializer._percent_encode(str(v))}"
+                        for v in value.values()
+                    ]
+                else:
+                    pairs = [f"{k},{v}" for k, v in value.items()]
+                    return RequestBodySerializer._percent_encode(",".join(pairs))
+
+        elif isinstance(value, (list, tuple)):
+            if explode:
+                return [
+                    RequestBodySerializer._percent_encode(str(item)) for item in value
+                ]
+            else:
+                return RequestBodySerializer._percent_encode(
+                    ",".join(str(v) for v in value)
+                )
+
+        else:
+            return RequestBodySerializer._percent_encode(str(value))
+
+    @staticmethod
+    def _serialize_multipart_form_data(
+        body_data: Dict[str, Any],
+        encoding_rules: Optional[Dict[str, Dict[str, Any]]] = None,
+    ) -> tuple[bytes, Dict[str, str]]:
+        """
+        Serialize body as multipart/form-data per RFC7578.
+
+        Supports file uploads and encoding rules.
+        """
+        import secrets
+
+        encoding_rules = encoding_rules or {}
+        boundary = f"----DocsGPT{secrets.token_hex(16)}"
+        parts = []
+
+        for key, value in body_data.items():
+            if value is None:
+                continue
+
+            rule = encoding_rules.get(key, {})
+            content_type = rule.get("contentType", "text/plain")
+            headers_rule = rule.get("headers", {})
+
+            part = RequestBodySerializer._create_multipart_part(
+                key, value, content_type, headers_rule
+            )
+            parts.append(part)
+
+        body_bytes = f"--{boundary}\r\n".encode("utf-8")
+        body_bytes += f"--{boundary}\r\n".join(parts).encode("utf-8")
+        body_bytes += f"\r\n--{boundary}--\r\n".encode("utf-8")
+
+        headers = {
+            "Content-Type": f"multipart/form-data; boundary={boundary}",
+        }
+        return body_bytes, headers
+
+    @staticmethod
+    def _create_multipart_part(
+        name: str, value: Any, content_type: str, headers_rule: Dict[str, Any]
+    ) -> str:
+        """Create a single multipart/form-data part."""
+        headers = [
+            f'Content-Disposition: form-data; name="{RequestBodySerializer._percent_encode(name)}"'
+        ]
+
+        if isinstance(value, bytes):
+            if content_type == "application/octet-stream":
+                value_encoded = base64.b64encode(value).decode("utf-8")
+            else:
+                value_encoded = value.decode("utf-8", errors="replace")
+            headers.append(f"Content-Type: {content_type}")
+            headers.append("Content-Transfer-Encoding: base64")
+        elif isinstance(value, dict):
+            if content_type == "application/json":
+                value_encoded = json.dumps(value, separators=(",", ":"))
+            elif content_type == "application/xml":
+                value_encoded = RequestBodySerializer._dict_to_xml(value)
+            else:
+                value_encoded = str(value)
+            headers.append(f"Content-Type: {content_type}")
+        elif isinstance(value, str) and content_type != "text/plain":
+            try:
+                if content_type == "application/json":
+                    json.loads(value)
+                    value_encoded = value
+                elif content_type == "application/xml":
+                    value_encoded = value
+                else:
+                    value_encoded = str(value)
+            except json.JSONDecodeError:
+                value_encoded = str(value)
+            headers.append(f"Content-Type: {content_type}")
+        else:
+            value_encoded = str(value)
+            if content_type != "text/plain":
+                headers.append(f"Content-Type: {content_type}")
+
+        part = "\r\n".join(headers) + "\r\n\r\n" + value_encoded + "\r\n"
+        return part
+
+    @staticmethod
+    def _serialize_text_plain(body_data: Dict[str, Any]) -> tuple[str, Dict[str, str]]:
+        """Serialize body as plain text."""
+        if len(body_data) == 1:
+            value = list(body_data.values())[0]
+            return str(value), {"Content-Type": ContentType.TEXT_PLAIN.value}
+        else:
+            text = "\n".join(f"{k}: {v}" for k, v in body_data.items())
+            return text, {"Content-Type": ContentType.TEXT_PLAIN.value}
+
+    @staticmethod
+    def _serialize_xml(body_data: Dict[str, Any]) -> tuple[str, Dict[str, str]]:
+        """Serialize body as XML."""
+        xml_str = RequestBodySerializer._dict_to_xml(body_data)
+        return xml_str, {"Content-Type": ContentType.XML.value}
+
+    @staticmethod
+    def _serialize_octet_stream(
+        body_data: Dict[str, Any],
+    ) -> tuple[bytes, Dict[str, str]]:
+        """Serialize body as binary octet stream."""
+        if isinstance(body_data, bytes):
+            return body_data, {"Content-Type": ContentType.OCTET_STREAM.value}
+        elif isinstance(body_data, str):
+            return body_data.encode("utf-8"), {
+                "Content-Type": ContentType.OCTET_STREAM.value
+            }
+        else:
+            serialized = json.dumps(body_data)
+            return serialized.encode("utf-8"), {
+                "Content-Type": ContentType.OCTET_STREAM.value
+            }
+
+    @staticmethod
+    def _percent_encode(value: str, safe_chars: str = "") -> str:
+        """
+        Percent-encode per RFC3986.
+
+        Args:
+            value: String to encode
+            safe_chars: Additional characters to not encode
+        """
+        return quote(value, safe=safe_chars)
+
+    @staticmethod
+    def _dict_to_xml(data: Dict[str, Any], root_name: str = "root") -> str:
+        """
+        Convert dict to simple XML format.
+        """
+
+        def build_xml(obj: Any, name: str) -> str:
+            if isinstance(obj, dict):
+                inner = "".join(build_xml(v, k) for k, v in obj.items())
+                return f"<{name}>{inner}</{name}>"
+            elif isinstance(obj, (list, tuple)):
+                items = "".join(
+                    build_xml(item, f"{name[:-1] if name.endswith('s') else name}")
+                    for item in obj
+                )
+                return items
+            else:
+                return f"<{name}>{RequestBodySerializer._escape_xml(str(obj))}</{name}>"
+
+        root = build_xml(data, root_name)
+        return f'<?xml version="1.0" encoding="UTF-8"?>{root}'
+
+    @staticmethod
+    def _escape_xml(value: str) -> str:
+        """Escape XML special characters."""
+        return (
+            value.replace("&", "&amp;")
+            .replace("<", "&lt;")
+            .replace(">", "&gt;")
+            .replace('"', "&quot;")
+            .replace("'", "&apos;")
+        )

application/agents/tools/api_tool.py

@@ -1,72 +1,280 @@
 import json
+import logging
+import re
+from typing import Any, Dict, Optional
+from urllib.parse import urlencode
 
 import requests
+
+from application.agents.tools.api_body_serializer import (
+    ContentType,
+    RequestBodySerializer,
+)
 from application.agents.tools.base import Tool
+from application.core.url_validation import validate_url, SSRFError
+
+logger = logging.getLogger(__name__)
+
+DEFAULT_TIMEOUT = 90  # seconds
 
 
 class APITool(Tool):
     """
     API Tool
-    A flexible tool for performing various API actions (e.g., sending messages, retrieving data) via custom user-specified APIs
+    A flexible tool for performing various API actions (e.g., sending messages, retrieving data) via custom user-specified APIs.
     """
 
     def __init__(self, config):
         self.config = config
         self.url = config.get("url", "")
         self.method = config.get("method", "GET")
-        self.headers = config.get("headers", {"Content-Type": "application/json"})
+        self.headers = config.get("headers", {})
         self.query_params = config.get("query_params", {})
+        self.body_content_type = config.get("body_content_type", ContentType.JSON)
+        self.body_encoding_rules = config.get("body_encoding_rules", {})
 
     def execute_action(self, action_name, **kwargs):
+        """Execute an API action with the given arguments."""
         return self._make_api_call(
-            self.url, self.method, self.headers, self.query_params, kwargs
+            self.url,
+            self.method,
+            self.headers,
+            self.query_params,
+            kwargs,
+            self.body_content_type,
+            self.body_encoding_rules,
         )
 
-    def _make_api_call(self, url, method, headers, query_params, body):
-        if query_params:
-            url = f"{url}?{requests.compat.urlencode(query_params)}"
-        # if isinstance(body, dict):
-        #     body = json.dumps(body)
+    def _make_api_call(
+        self,
+        url: str,
+        method: str,
+        headers: Dict[str, str],
+        query_params: Dict[str, Any],
+        body: Dict[str, Any],
+        content_type: str = ContentType.JSON,
+        encoding_rules: Optional[Dict[str, Dict[str, Any]]] = None,
+    ) -> Dict[str, Any]:
+        """
+        Make an API call with proper body serialization and error handling.
+
+        Args:
+            url: API endpoint URL
+            method: HTTP method (GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS)
+            headers: Request headers dict
+            query_params: URL query parameters
+            body: Request body as dict
+            content_type: Content-Type for serialization
+            encoding_rules: OpenAPI encoding rules
+
+        Returns:
+            Dict with status_code, data, and message
+        """
+        request_url = url
+        request_headers = headers.copy() if headers else {}
+        response = None
+
+        # Validate URL to prevent SSRF attacks
         try:
-            print(f"Making API call: {method} {url} with body: {body}")
-            if body == "{}":
-                body = None
-            response = requests.request(method, url, headers=headers, data=body)
-            response.raise_for_status()
-            content_type = response.headers.get(
-                "Content-Type", "application/json"
-            ).lower()
-            if "application/json" in content_type:
+            validate_url(request_url)
+        except SSRFError as e:
+            logger.error(f"URL validation failed: {e}")
+            return {
+                "status_code": None,
+                "message": f"URL validation error: {e}",
+                "data": None,
+            }
+
+        try:
+            path_params_used = set()
+            if query_params:
+                for match in re.finditer(r"\{([^}]+)\}", request_url):
+                    param_name = match.group(1)
+                    if param_name in query_params:
+                        request_url = request_url.replace(
+                            f"{{{param_name}}}", str(query_params[param_name])
+                        )
+                        path_params_used.add(param_name)
+            remaining_params = {
+                k: v for k, v in query_params.items() if k not in path_params_used
+            }
+            if remaining_params:
+                query_string = urlencode(remaining_params)
+                separator = "&" if "?" in request_url else "?"
+                request_url = f"{request_url}{separator}{query_string}"
+
+            # Re-validate URL after parameter substitution to prevent SSRF via path params
+            try:
+                validate_url(request_url)
+            except SSRFError as e:
+                logger.error(f"URL validation failed after parameter substitution: {e}")
+                return {
+                    "status_code": None,
+                    "message": f"URL validation error: {e}",
+                    "data": None,
+                }
+
+            # Serialize body based on content type
+
+            if body and body != {}:
                 try:
-                    data = response.json()
-                except json.JSONDecodeError as e:
-                    print(f"Error decoding JSON: {e}.  Raw response: {response.text}")
+                    serialized_body, body_headers = RequestBodySerializer.serialize(
+                        body, content_type, encoding_rules
+                    )
+                    request_headers.update(body_headers)
+                except ValueError as e:
+                    logger.error(f"Body serialization failed: {str(e)}")
                     return {
-                        "status_code": response.status_code,
-                        "message": f"API call returned invalid JSON.  Error: {e}",
-                        "data": response.text,
+                        "status_code": None,
+                        "message": f"Body serialization error: {str(e)}",
+                        "data": None,
                     }
-            elif "text/" in content_type or "application/xml" in content_type:
-                data = response.text
-            elif not response.content:
-                data = None
             else:
-                print(f"Unsupported content type: {content_type}")
-                data = response.content
+                serialized_body = None
+            if "Content-Type" not in request_headers and method not in [
+                "GET",
+                "HEAD",
+                "DELETE",
+            ]:
+                request_headers["Content-Type"] = ContentType.JSON
+            logger.debug(
+                f"API Call: {method} {request_url} | Content-Type: {request_headers.get('Content-Type', 'N/A')}"
+            )
+
+            if method.upper() == "GET":
+                response = requests.get(
+                    request_url, headers=request_headers, timeout=DEFAULT_TIMEOUT
+                )
+            elif method.upper() == "POST":
+                response = requests.post(
+                    request_url,
+                    data=serialized_body,
+                    headers=request_headers,
+                    timeout=DEFAULT_TIMEOUT,
+                )
+            elif method.upper() == "PUT":
+                response = requests.put(
+                    request_url,
+                    data=serialized_body,
+                    headers=request_headers,
+                    timeout=DEFAULT_TIMEOUT,
+                )
+            elif method.upper() == "DELETE":
+                response = requests.delete(
+                    request_url, headers=request_headers, timeout=DEFAULT_TIMEOUT
+                )
+            elif method.upper() == "PATCH":
+                response = requests.patch(
+                    request_url,
+                    data=serialized_body,
+                    headers=request_headers,
+                    timeout=DEFAULT_TIMEOUT,
+                )
+            elif method.upper() == "HEAD":
+                response = requests.head(
+                    request_url, headers=request_headers, timeout=DEFAULT_TIMEOUT
+                )
+            elif method.upper() == "OPTIONS":
+                response = requests.options(
+                    request_url, headers=request_headers, timeout=DEFAULT_TIMEOUT
+                )
+            else:
+                return {
+                    "status_code": None,
+                    "message": f"Unsupported HTTP method: {method}",
+                    "data": None,
+                }
+            response.raise_for_status()
+
+            data = self._parse_response(response)
 
             return {
                 "status_code": response.status_code,
                 "data": data,
                 "message": "API call successful.",
             }
+        except requests.exceptions.Timeout:
+            logger.error(f"Request timeout for {request_url}")
+            return {
+                "status_code": None,
+                "message": f"Request timeout ({DEFAULT_TIMEOUT}s exceeded)",
+                "data": None,
+            }
+        except requests.exceptions.ConnectionError as e:
+            logger.error(f"Connection error: {str(e)}")
+            return {
+                "status_code": None,
+                "message": f"Connection error: {str(e)}",
+                "data": None,
+            }
+        except requests.exceptions.HTTPError as e:
+            logger.error(f"HTTP error {response.status_code}: {str(e)}")
+            try:
+                error_data = response.json()
+            except (json.JSONDecodeError, ValueError):
+                error_data = response.text
+            return {
+                "status_code": response.status_code,
+                "message": f"HTTP Error {response.status_code}",
+                "data": error_data,
+            }
         except requests.exceptions.RequestException as e:
+            logger.error(f"Request failed: {str(e)}")
             return {
                 "status_code": response.status_code if response else None,
                 "message": f"API call failed: {str(e)}",
+                "data": None,
+            }
+        except Exception as e:
+            logger.error(f"Unexpected error in API call: {str(e)}", exc_info=True)
+            return {
+                "status_code": None,
+                "message": f"Unexpected error: {str(e)}",
+                "data": None,
             }
 
+    def _parse_response(self, response: requests.Response) -> Any:
+        """
+        Parse response based on Content-Type header.
+
+        Supports: JSON, XML, plain text, binary data.
+        """
+        content_type = response.headers.get("Content-Type", "").lower()
+
+        if not response.content:
+            return None
+        # JSON response
+
+        if "application/json" in content_type:
+            try:
+                return response.json()
+            except json.JSONDecodeError as e:
+                logger.warning(f"Failed to parse JSON response: {str(e)}")
+                return response.text
+        # XML response
+
+        elif "application/xml" in content_type or "text/xml" in content_type:
+            return response.text
+        # Plain text response
+
+        elif "text/plain" in content_type or "text/html" in content_type:
+            return response.text
+        # Binary/unknown response
+
+        else:
+            # Try to decode as text first, fall back to base64
+
+            try:
+                return response.text
+            except (UnicodeDecodeError, AttributeError):
+                import base64
+
+                return base64.b64encode(response.content).decode("utf-8")
+
     def get_actions_metadata(self):
+        """Return metadata for available actions (none for API Tool - actions are user-defined)."""
         return []
 
     def get_config_requirements(self):
+        """Return configuration requirements for the tool."""
         return {}

application/agents/tools/base.py

@@ -2,6 +2,8 @@ from abc import ABC, abstractmethod
 
 
 class Tool(ABC):
+    internal: bool = False
+
     @abstractmethod
     def execute_action(self, action_name: str, **kwargs):
         pass

application/agents/tools/brave.py

@@ -1,6 +1,11 @@
+import logging
+
 import requests
+
 from application.agents.tools.base import Tool
 
+logger = logging.getLogger(__name__)
+
 
 class BraveSearchTool(Tool):
     """
@@ -41,7 +46,7 @@ class BraveSearchTool(Tool):
         """
         Performs a web search using the Brave Search API.
         """
-        print(f"Performing Brave web search for: {query}")
+        logger.debug("Performing Brave web search for: %s", query)
 
         url = f"{self.base_url}/web/search"
 
@@ -68,7 +73,7 @@ class BraveSearchTool(Tool):
             "X-Subscription-Token": self.token,
         }
 
-        response = requests.get(url, params=params, headers=headers)
+        response = requests.get(url, params=params, headers=headers, timeout=100)
 
         if response.status_code == 200:
             return {
@@ -94,7 +99,7 @@ class BraveSearchTool(Tool):
         """
         Performs an image search using the Brave Search API.
         """
-        print(f"Performing Brave image search for: {query}")
+        logger.debug("Performing Brave image search for: %s", query)
 
         url = f"{self.base_url}/images/search"
 
@@ -113,7 +118,7 @@ class BraveSearchTool(Tool):
             "X-Subscription-Token": self.token,
         }
 
-        response = requests.get(url, params=params, headers=headers)
+        response = requests.get(url, params=params, headers=headers, timeout=100)
 
         if response.status_code == 200:
             return {
@@ -177,6 +182,10 @@ class BraveSearchTool(Tool):
         return {
             "token": {
                 "type": "string",
+                "label": "API Key",
                 "description": "Brave Search API key for authentication",
+                "required": True,
+                "secret": True,
+                "order": 1,
             },
         }

application/agents/tools/cryptoprice.py

@@ -28,7 +28,7 @@ class CryptoPriceTool(Tool):
             returns price in USD.
         """
         url = f"https://min-api.cryptocompare.com/data/price?fsym={symbol.upper()}&tsyms={currency.upper()}"
-        response = requests.get(url)
+        response = requests.get(url, timeout=100)
         if response.status_code == 200:
             data = response.json()
             if currency.upper() in data:

application/agents/tools/duckduckgo.py

@@ -1,5 +1,14 @@
+import logging
+import time
+from typing import Any, Dict, Optional
+
 from application.agents.tools.base import Tool
-from duckduckgo_search import DDGS
+
+logger = logging.getLogger(__name__)
+
+MAX_RETRIES = 3
+RETRY_DELAY = 2.0
+DEFAULT_TIMEOUT = 15
 
 
 class DuckDuckGoSearchTool(Tool):
@@ -10,71 +19,123 @@ class DuckDuckGoSearchTool(Tool):
 
     def __init__(self, config):
         self.config = config
+        self.timeout = config.get("timeout", DEFAULT_TIMEOUT)
+
+    def _get_ddgs_client(self):
+        from ddgs import DDGS
+
+        return DDGS(timeout=self.timeout)
+
+    def _execute_with_retry(self, operation, operation_name: str) -> Dict[str, Any]:
+        last_error = None
+        for attempt in range(1, MAX_RETRIES + 1):
+            try:
+                results = operation()
+                return {
+                    "status_code": 200,
+                    "results": list(results) if results else [],
+                    "message": f"{operation_name} completed successfully.",
+                }
+            except Exception as e:
+                last_error = e
+                error_str = str(e).lower()
+                if "ratelimit" in error_str or "429" in error_str:
+                    if attempt < MAX_RETRIES:
+                        delay = RETRY_DELAY * attempt
+                        logger.warning(
+                            f"{operation_name} rate limited, retrying in {delay}s (attempt {attempt}/{MAX_RETRIES})"
+                        )
+                        time.sleep(delay)
+                        continue
+                logger.error(f"{operation_name} failed: {e}")
+                break
+        return {
+            "status_code": 500,
+            "results": [],
+            "message": f"{operation_name} failed: {str(last_error)}",
+        }
 
     def execute_action(self, action_name, **kwargs):
         actions = {
             "ddg_web_search": self._web_search,
             "ddg_image_search": self._image_search,
+            "ddg_news_search": self._news_search,
         }
-
-        if action_name in actions:
-            return actions[action_name](**kwargs)
-        else:
+        if action_name not in actions:
             raise ValueError(f"Unknown action: {action_name}")
+        return actions[action_name](**kwargs)
 
     def _web_search(
         self,
-        query,
-        max_results=5,
-    ):
-        print(f"Performing DuckDuckGo web search for: {query}")
+        query: str,
+        max_results: int = 5,
+        region: str = "wt-wt",
+        safesearch: str = "moderate",
+        timelimit: Optional[str] = None,
+    ) -> Dict[str, Any]:
+        logger.info(f"DuckDuckGo web search: {query}")
 
-        try:
-            results = DDGS().text(
+        def operation():
+            client = self._get_ddgs_client()
+            return client.text(
                 query,
-                max_results=max_results,
+                region=region,
+                safesearch=safesearch,
+                timelimit=timelimit,
+                max_results=min(max_results, 20),
             )
 
-            return {
-                "status_code": 200,
-                "results": results,
-                "message": "Web search completed successfully.",
-            }
-        except Exception as e:
-            return {
-                "status_code": 500,
-                "message": f"Web search failed: {str(e)}",
-            }
+        return self._execute_with_retry(operation, "Web search")
 
     def _image_search(
         self,
-        query,
-        max_results=5,
-    ):
-        print(f"Performing DuckDuckGo image search for: {query}")
+        query: str,
+        max_results: int = 5,
+        region: str = "wt-wt",
+        safesearch: str = "moderate",
+        timelimit: Optional[str] = None,
+    ) -> Dict[str, Any]:
+        logger.info(f"DuckDuckGo image search: {query}")
 
-        try:
-            results = DDGS().images(
-                keywords=query,
-                max_results=max_results,
+        def operation():
+            client = self._get_ddgs_client()
+            return client.images(
+                query,
+                region=region,
+                safesearch=safesearch,
+                timelimit=timelimit,
+                max_results=min(max_results, 50),
             )
 
-            return {
-                "status_code": 200,
-                "results": results,
-                "message": "Image search completed successfully.",
-            }
-        except Exception as e:
-            return {
-                "status_code": 500,
-                "message": f"Image search failed: {str(e)}",
-            }
+        return self._execute_with_retry(operation, "Image search")
+
+    def _news_search(
+        self,
+        query: str,
+        max_results: int = 5,
+        region: str = "wt-wt",
+        safesearch: str = "moderate",
+        timelimit: Optional[str] = None,
+    ) -> Dict[str, Any]:
+        logger.info(f"DuckDuckGo news search: {query}")
+
+        def operation():
+            client = self._get_ddgs_client()
+            return client.news(
+                query,
+                region=region,
+                safesearch=safesearch,
+                timelimit=timelimit,
+                max_results=min(max_results, 20),
+            )
+
+        return self._execute_with_retry(operation, "News search")
 
     def get_actions_metadata(self):
         return [
             {
                 "name": "ddg_web_search",
-                "description": "Perform a web search using DuckDuckGo.",
+                "description": "Search the web using DuckDuckGo. Returns titles, URLs, and snippets.",
                 "parameters": {
                     "type": "object",
                     "properties": {
@@ -84,7 +145,15 @@ class DuckDuckGoSearchTool(Tool):
                         },
                         "max_results": {
                             "type": "integer",
-                            "description": "Number of results to return (default: 5)",
+                            "description": "Number of results (default: 5, max: 20)",
+                        },
+                        "region": {
+                            "type": "string",
+                            "description": "Region code (default: wt-wt for worldwide, us-en for US)",
+                        },
+                        "timelimit": {
+                            "type": "string",
+                            "description": "Time filter: d (day), w (week), m (month), y (year)",
                         },
                     },
                     "required": ["query"],
@@ -92,17 +161,43 @@ class DuckDuckGoSearchTool(Tool):
             },
             {
                 "name": "ddg_image_search",
-                "description": "Perform an image search using DuckDuckGo.",
+                "description": "Search for images using DuckDuckGo. Returns image URLs and metadata.",
                 "parameters": {
                     "type": "object",
                     "properties": {
                         "query": {
                             "type": "string",
-                            "description": "Search query",
+                            "description": "Image search query",
                         },
                         "max_results": {
                             "type": "integer",
-                            "description": "Number of results to return (default: 5, max: 50)",
+                            "description": "Number of results (default: 5, max: 50)",
+                        },
+                        "region": {
+                            "type": "string",
+                            "description": "Region code (default: wt-wt for worldwide)",
+                        },
+                    },
+                    "required": ["query"],
+                },
+            },
+            {
+                "name": "ddg_news_search",
+                "description": "Search for news articles using DuckDuckGo. Returns recent news.",
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "query": {
+                            "type": "string",
+                            "description": "News search query",
+                        },
+                        "max_results": {
+                            "type": "integer",
+                            "description": "Number of results (default: 5, max: 20)",
+                        },
+                        "timelimit": {
+                            "type": "string",
+                            "description": "Time filter: d (day), w (week), m (month)",
                         },
                     },
                     "required": ["query"],

application/agents/tools/internal_search.py

@@ -0,0 +1,438 @@
+import json
+import logging
+from typing import Dict, List, Optional
+
+from application.agents.tools.base import Tool
+from application.core.settings import settings
+from application.retriever.retriever_creator import RetrieverCreator
+
+logger = logging.getLogger(__name__)
+
+
+class InternalSearchTool(Tool):
+    """Wraps the ClassicRAG retriever as an LLM-callable tool.
+
+    Instead of pre-fetching docs into the prompt, the LLM decides
+    when and what to search. Supports multiple searches per session.
+
+    Optional capabilities (enabled when sources have directory_structure):
+    - path_filter on search: restrict results to a specific file/folder
+    - list_files action: browse the file/folder structure
+    """
+
+    internal = True
+
+    def __init__(self, config: Dict):
+        self.config = config
+        self.retrieved_docs: List[Dict] = []
+        self._retriever = None
+        self._directory_structure: Optional[Dict] = None
+        self._dir_structure_loaded = False
+
+    def _get_retriever(self):
+        if self._retriever is None:
+            self._retriever = RetrieverCreator.create_retriever(
+                self.config.get("retriever_name", "classic"),
+                source=self.config.get("source", {}),
+                chat_history=[],
+                prompt="",
+                chunks=int(self.config.get("chunks", 2)),
+                doc_token_limit=int(self.config.get("doc_token_limit", 50000)),
+                model_id=self.config.get("model_id", "docsgpt-local"),
+                user_api_key=self.config.get("user_api_key"),
+                agent_id=self.config.get("agent_id"),
+                llm_name=self.config.get("llm_name", settings.LLM_PROVIDER),
+                api_key=self.config.get("api_key", settings.API_KEY),
+                decoded_token=self.config.get("decoded_token"),
+            )
+        return self._retriever
+
+    def _get_directory_structure(self) -> Optional[Dict]:
+        """Load directory structure from MongoDB for the configured sources."""
+        if self._dir_structure_loaded:
+            return self._directory_structure
+
+        self._dir_structure_loaded = True
+        source = self.config.get("source", {})
+        active_docs = source.get("active_docs", [])
+        if not active_docs:
+            return None
+
+        try:
+            from bson.objectid import ObjectId
+            from application.core.mongo_db import MongoDB
+
+            mongo = MongoDB.get_client()
+            db = mongo[settings.MONGO_DB_NAME]
+            sources_collection = db["sources"]
+
+            if isinstance(active_docs, str):
+                active_docs = [active_docs]
+
+            merged_structure = {}
+            for doc_id in active_docs:
+                try:
+                    source_doc = sources_collection.find_one(
+                        {"_id": ObjectId(doc_id)}
+                    )
+                    if not source_doc:
+                        continue
+                    dir_str = source_doc.get("directory_structure")
+                    if dir_str:
+                        if isinstance(dir_str, str):
+                            dir_str = json.loads(dir_str)
+                        source_name = source_doc.get("name", doc_id)
+                        if len(active_docs) > 1:
+                            merged_structure[source_name] = dir_str
+                        else:
+                            merged_structure = dir_str
+                except Exception as e:
+                    logger.debug(f"Could not load dir structure for {doc_id}: {e}")
+
+            self._directory_structure = merged_structure if merged_structure else None
+        except Exception as e:
+            logger.debug(f"Failed to load directory structures: {e}")
+
+        return self._directory_structure
+
+    def execute_action(self, action_name: str, **kwargs):
+        if action_name == "search":
+            return self._execute_search(**kwargs)
+        elif action_name == "list_files":
+            return self._execute_list_files(**kwargs)
+        return f"Unknown action: {action_name}"
+
+    def _execute_search(self, **kwargs) -> str:
+        query = kwargs.get("query", "")
+        path_filter = kwargs.get("path_filter", "")
+
+        if not query:
+            return "Error: 'query' parameter is required."
+
+        try:
+            retriever = self._get_retriever()
+            docs = retriever.search(query)
+        except Exception as e:
+            logger.error(f"Internal search failed: {e}", exc_info=True)
+            return "Search failed: an internal error occurred."
+
+        if not docs:
+            return "No documents found matching your query."
+
+        # Apply path filter if specified
+        if path_filter:
+            path_lower = path_filter.lower()
+            docs = [
+                d
+                for d in docs
+                if path_lower in d.get("source", "").lower()
+                or path_lower in d.get("filename", "").lower()
+                or path_lower in d.get("title", "").lower()
+            ]
+            if not docs:
+                return f"No documents found matching query '{query}' in path '{path_filter}'."
+
+        # Accumulate for source tracking
+        for doc in docs:
+            if doc not in self.retrieved_docs:
+                self.retrieved_docs.append(doc)
+
+        # Format results for the LLM
+        formatted = []
+        for i, doc in enumerate(docs, 1):
+            title = doc.get("title", "Untitled")
+            text = doc.get("text", "")
+            source = doc.get("source", "Unknown")
+            filename = doc.get("filename", "")
+            header = filename or title
+            formatted.append(f"[{i}] {header} (source: {source})\n{text}")
+
+        return "\n\n---\n\n".join(formatted)
+
+    def _execute_list_files(self, **kwargs) -> str:
+        path = kwargs.get("path", "")
+        dir_structure = self._get_directory_structure()
+
+        if not dir_structure:
+            return "No file structure available for the current sources."
+
+        # Navigate to the requested path
+        current = dir_structure
+        if path:
+            for part in path.strip("/").split("/"):
+                if not part:
+                    continue
+                if isinstance(current, dict) and part in current:
+                    current = current[part]
+                else:
+                    return f"Path '{path}' not found in the file structure."
+
+        # Format the structure for the LLM
+        return self._format_structure(current, path or "/")
+
+    def _format_structure(self, node: Dict, current_path: str) -> str:
+        if not isinstance(node, dict):
+            return f"'{current_path}' is a file, not a directory."
+
+        lines = [f"File structure at '{current_path}':\n"]
+        folders = []
+        files = []
+
+        for name, value in sorted(node.items()):
+            if isinstance(value, dict):
+                # Check if it's a file metadata dict or a folder
+                if "type" in value or "size_bytes" in value or "token_count" in value:
+                    # It's a file with metadata
+                    size = value.get("token_count", "")
+                    ftype = value.get("type", "")
+                    info_parts = []
+                    if ftype:
+                        info_parts.append(ftype)
+                    if size:
+                        info_parts.append(f"{size} tokens")
+                    info = f" ({', '.join(info_parts)})" if info_parts else ""
+                    files.append(f"  {name}{info}")
+                else:
+                    # It's a folder
+                    count = self._count_files(value)
+                    folders.append(f"  {name}/ ({count} items)")
+            else:
+                files.append(f"  {name}")
+
+        if folders:
+            lines.append("Folders:")
+            lines.extend(folders)
+        if files:
+            lines.append("Files:")
+            lines.extend(files)
+        if not folders and not files:
+            lines.append("  (empty)")
+
+        return "\n".join(lines)
+
+    def _count_files(self, node: Dict) -> int:
+        count = 0
+        for value in node.values():
+            if isinstance(value, dict):
+                if "type" in value or "size_bytes" in value or "token_count" in value:
+                    count += 1
+                else:
+                    count += self._count_files(value)
+            else:
+                count += 1
+        return count
+
+    def get_actions_metadata(self):
+        actions = [
+            {
+                "name": "search",
+                "description": (
+                    "Search the user's uploaded documents and knowledge base. "
+                    "Use this to find relevant information before answering questions. "
+                    "You can call this multiple times with different queries."
+                ),
+                "parameters": {
+                    "properties": {
+                        "query": {
+                            "type": "string",
+                            "description": "The search query. Be specific and focused.",
+                            "filled_by_llm": True,
+                            "required": True,
+                        },
+                    }
+                },
+            }
+        ]
+
+        # Add path_filter and list_files only if directory structure exists
+        has_structure = self.config.get("has_directory_structure", False)
+        if has_structure:
+            actions[0]["parameters"]["properties"]["path_filter"] = {
+                "type": "string",
+                "description": (
+                    "Optional: filter results to a specific file or folder path. "
+                    "Use list_files first to see available paths."
+                ),
+                "filled_by_llm": True,
+                "required": False,
+            }
+            actions.append(
+                {
+                    "name": "list_files",
+                    "description": (
+                        "Browse the file and folder structure of the knowledge base. "
+                        "Use this to see what files are available before searching. "
+                        "Optionally provide a path to browse a specific folder."
+                    ),
+                    "parameters": {
+                        "properties": {
+                            "path": {
+                                "type": "string",
+                                "description": "Optional: folder path to browse. Leave empty for root.",
+                                "filled_by_llm": True,
+                                "required": False,
+                            }
+                        }
+                    },
+                }
+            )
+
+        return actions
+
+    def get_config_requirements(self):
+        return {}
+
+
+# Constants for building synthetic tools_dict entries
+INTERNAL_TOOL_ID = "internal"
+
+
+def build_internal_tool_entry(has_directory_structure: bool = False) -> Dict:
+    """Build the tools_dict entry for InternalSearchTool.
+
+    Dynamically includes list_files and path_filter based on
+    whether the sources have directory structure.
+    """
+    search_params = {
+        "properties": {
+            "query": {
+                "type": "string",
+                "description": "The search query. Be specific and focused.",
+                "filled_by_llm": True,
+                "required": True,
+            }
+        }
+    }
+
+    actions = [
+        {
+            "name": "search",
+            "description": (
+                "Search the user's uploaded documents and knowledge base. "
+                "Use this to find relevant information before answering questions. "
+                "You can call this multiple times with different queries."
+            ),
+            "active": True,
+            "parameters": search_params,
+        }
+    ]
+
+    if has_directory_structure:
+        search_params["properties"]["path_filter"] = {
+            "type": "string",
+            "description": (
+                "Optional: filter results to a specific file or folder path. "
+                "Use list_files first to see available paths."
+            ),
+            "filled_by_llm": True,
+            "required": False,
+        }
+        actions.append(
+            {
+                "name": "list_files",
+                "description": (
+                    "Browse the file and folder structure of the knowledge base. "
+                    "Use this to see what files are available before searching. "
+                    "Optionally provide a path to browse a specific folder."
+                ),
+                "active": True,
+                "parameters": {
+                    "properties": {
+                        "path": {
+                            "type": "string",
+                            "description": "Optional: folder path to browse. Leave empty for root.",
+                            "filled_by_llm": True,
+                            "required": False,
+                        }
+                    }
+                },
+            }
+        )
+
+    return {"name": "internal_search", "actions": actions}
+
+
+# Keep backward compat
+INTERNAL_TOOL_ENTRY = build_internal_tool_entry(has_directory_structure=False)
+
+
+def sources_have_directory_structure(source: Dict) -> bool:
+    """Check if any of the active sources have directory_structure in MongoDB."""
+    active_docs = source.get("active_docs", [])
+    if not active_docs:
+        return False
+
+    try:
+        from bson.objectid import ObjectId
+        from application.core.mongo_db import MongoDB
+
+        mongo = MongoDB.get_client()
+        db = mongo[settings.MONGO_DB_NAME]
+        sources_collection = db["sources"]
+
+        if isinstance(active_docs, str):
+            active_docs = [active_docs]
+
+        for doc_id in active_docs:
+            try:
+                source_doc = sources_collection.find_one(
+                    {"_id": ObjectId(doc_id)},
+                    {"directory_structure": 1},
+                )
+                if source_doc and source_doc.get("directory_structure"):
+                    return True
+            except Exception:
+                continue
+    except Exception as e:
+        logger.debug(f"Could not check directory structure: {e}")
+
+    return False
+
+
+def add_internal_search_tool(tools_dict: Dict, retriever_config: Dict) -> None:
+    """Add the internal search tool to tools_dict if sources are configured.
+
+    Shared by AgenticAgent and ResearchAgent to avoid duplicate setup logic.
+    Mutates tools_dict in place.
+    """
+    source = retriever_config.get("source", {})
+    has_sources = bool(source.get("active_docs"))
+    if not retriever_config or not has_sources:
+        return
+
+    has_dir = sources_have_directory_structure(source)
+    internal_entry = build_internal_tool_entry(has_directory_structure=has_dir)
+    internal_entry["config"] = build_internal_tool_config(
+        **retriever_config,
+        has_directory_structure=has_dir,
+    )
+    tools_dict[INTERNAL_TOOL_ID] = internal_entry
+
+
+def build_internal_tool_config(
+    source: Dict,
+    retriever_name: str = "classic",
+    chunks: int = 2,
+    doc_token_limit: int = 50000,
+    model_id: str = "docsgpt-local",
+    user_api_key: Optional[str] = None,
+    agent_id: Optional[str] = None,
+    llm_name: str = None,
+    api_key: str = None,
+    decoded_token: Optional[Dict] = None,
+    has_directory_structure: bool = False,
+) -> Dict:
+    """Build the config dict for InternalSearchTool."""
+    return {
+        "source": source,
+        "retriever_name": retriever_name,
+        "chunks": chunks,
+        "doc_token_limit": doc_token_limit,
+        "model_id": model_id,
+        "user_api_key": user_api_key,
+        "agent_id": agent_id,
+        "llm_name": llm_name or settings.LLM_PROVIDER,
+        "api_key": api_key or settings.API_KEY,
+        "decoded_token": decoded_token,
+        "has_directory_structure": has_directory_structure,
+    }

application/agents/tools/mcp_tool.py

@@ -1,20 +1,12 @@
 import asyncio
 import base64
+import concurrent.futures
 import json
 import logging
 import time
 from typing import Any, Dict, List, Optional
 from urllib.parse import parse_qs, urlparse
 
-from application.agents.tools.base import Tool
-from application.api.user.tasks import mcp_oauth_status_task, mcp_oauth_task
-from application.cache import get_redis_instance
-
-from application.core.mongo_db import MongoDB
-
-from application.core.settings import settings
-
-from application.security.encryption import decrypt_credentials
 from fastmcp import Client
 from fastmcp.client.auth import BearerAuth
 from fastmcp.client.transports import (
@@ -24,10 +16,19 @@ from fastmcp.client.transports import (
 )
 from mcp.client.auth import OAuthClientProvider, TokenStorage
 from mcp.shared.auth import OAuthClientInformationFull, OAuthClientMetadata, OAuthToken
-
 from pydantic import AnyHttpUrl, ValidationError
 from redis import Redis
 
+from application.agents.tools.base import Tool
+from application.api.user.tasks import mcp_oauth_status_task, mcp_oauth_task
+from application.cache import get_redis_instance
+from application.core.mongo_db import MongoDB
+from application.core.settings import settings
+from application.core.url_validation import SSRFError, validate_url
+from application.security.encryption import decrypt_credentials
+
+logger = logging.getLogger(__name__)
+
 mongo = MongoDB.get_client()
 db = mongo[settings.MONGO_DB_NAME]
 
@@ -56,11 +57,13 @@ class MCPTool(Tool):
                 - args: Arguments for STDIO transport
                 - oauth_scopes: OAuth scopes for oauth auth type
                 - oauth_client_name: OAuth client name for oauth auth type
+                - query_mode: If True, use non-interactive OAuth (fail-fast on 401)
             user_id: User ID for decrypting credentials (required if encrypted_credentials exist)
         """
         self.config = config
         self.user_id = user_id
-        self.server_url = config.get("server_url", "")
+        raw_url = config.get("server_url", "")
+        self.server_url = self._validate_server_url(raw_url) if raw_url else ""
         self.transport_type = config.get("transport_type", "auto")
         self.auth_type = config.get("auth_type", "none")
         self.timeout = config.get("timeout", 30)
@@ -76,23 +79,53 @@ class MCPTool(Tool):
         self.oauth_scopes = config.get("oauth_scopes", [])
         self.oauth_task_id = config.get("oauth_task_id", None)
         self.oauth_client_name = config.get("oauth_client_name", "DocsGPT-MCP")
-        self.redirect_uri = f"{settings.API_URL}/api/mcp_server/callback"
+        self.redirect_uri = self._resolve_redirect_uri(config.get("redirect_uri"))
 
         self.available_tools = []
         self._cache_key = self._generate_cache_key()
         self._client = None
-
-        # Only validate and setup if server_url is provided and not OAuth
+        self.query_mode = config.get("query_mode", False)
 
         if self.server_url and self.auth_type != "oauth":
             self._setup_client()
 
+    @staticmethod
+    def _validate_server_url(server_url: str) -> str:
+        """Validate server_url to prevent SSRF to internal networks.
+
+        Raises:
+            ValueError: If the URL points to a private/internal address.
+        """
+        try:
+            return validate_url(server_url)
+        except SSRFError as exc:
+            raise ValueError(f"Invalid MCP server URL: {exc}") from exc
+
+    def _resolve_redirect_uri(self, configured_redirect_uri: Optional[str]) -> str:
+        if configured_redirect_uri:
+            return configured_redirect_uri.rstrip("/")
+
+        explicit = getattr(settings, "MCP_OAUTH_REDIRECT_URI", None)
+        if explicit:
+            return explicit.rstrip("/")
+
+        connector_base = getattr(settings, "CONNECTOR_REDIRECT_BASE_URI", None)
+        if connector_base:
+            parsed = urlparse(connector_base)
+            if parsed.scheme and parsed.netloc:
+                return f"{parsed.scheme}://{parsed.netloc}/api/mcp_server/callback"
+
+        return f"{settings.API_URL.rstrip('/')}/api/mcp_server/callback"
+
     def _generate_cache_key(self) -> str:
         """Generate a unique cache key for this MCP server configuration."""
         auth_key = ""
         if self.auth_type == "oauth":
             scopes_str = ",".join(self.oauth_scopes) if self.oauth_scopes else "none"
-            auth_key = f"oauth:{self.oauth_client_name}:{scopes_str}"
+            oauth_identity = self.user_id or self.oauth_task_id or "anonymous"
+            auth_key = (
+                f"oauth:{oauth_identity}:{self.oauth_client_name}:{scopes_str}:{self.redirect_uri}"
+            )
         elif self.auth_type in ["bearer"]:
             token = self.auth_credentials.get(
                 "bearer_token", ""
@@ -109,11 +142,10 @@ class MCPTool(Tool):
         return f"{self.server_url}#{self.transport_type}#{auth_key}"
 
     def _setup_client(self):
-        """Setup FastMCP client with proper transport and authentication."""
         global _mcp_clients_cache
         if self._cache_key in _mcp_clients_cache:
             cached_data = _mcp_clients_cache[self._cache_key]
-            if time.time() - cached_data["created_at"] < 1800:
+            if time.time() - cached_data["created_at"] < 300:
                 self._client = cached_data["client"]
                 return
             else:
@@ -123,15 +155,25 @@ class MCPTool(Tool):
 
         if self.auth_type == "oauth":
             redis_client = get_redis_instance()
-            auth = DocsGPTOAuth(
-                mcp_url=self.server_url,
-                scopes=self.oauth_scopes,
-                redis_client=redis_client,
-                redirect_uri=self.redirect_uri,
-                task_id=self.oauth_task_id,
-                db=db,
-                user_id=self.user_id,
-            )
+            if self.query_mode:
+                auth = NonInteractiveOAuth(
+                    mcp_url=self.server_url,
+                    scopes=self.oauth_scopes,
+                    redis_client=redis_client,
+                    redirect_uri=self.redirect_uri,
+                    db=db,
+                    user_id=self.user_id,
+                )
+            else:
+                auth = DocsGPTOAuth(
+                    mcp_url=self.server_url,
+                    scopes=self.oauth_scopes,
+                    redis_client=redis_client,
+                    redirect_uri=self.redirect_uri,
+                    task_id=self.oauth_task_id,
+                    db=db,
+                    user_id=self.user_id,
+                )
         elif self.auth_type == "bearer":
             token = self.auth_credentials.get(
                 "bearer_token", ""
@@ -169,6 +211,8 @@ class MCPTool(Tool):
                 transport_type = "http"
         else:
             transport_type = self.transport_type
+        if transport_type == "stdio":
+            raise ValueError("STDIO transport is disabled")
         if transport_type == "sse":
             headers.update({"Accept": "text/event-stream", "Cache-Control": "no-cache"})
             return SSETransport(url=self.server_url, headers=headers)
@@ -231,38 +275,53 @@ class MCPTool(Tool):
             else:
                 raise Exception(f"Unknown operation: {operation}")
 
+    _ERROR_MAP = [
+        (concurrent.futures.TimeoutError, lambda op, t, _: f"Timed out after {t}s"),
+        (ConnectionRefusedError, lambda *_: "Connection refused"),
+    ]
+
+    _ERROR_PATTERNS = {
+        ("403", "Forbidden"): "Access denied (403 Forbidden)",
+        ("401", "Unauthorized"): "Authentication failed (401 Unauthorized)",
+        ("ECONNREFUSED",): "Connection refused",
+        ("SSL", "certificate"): "SSL/TLS error",
+    }
+
     def _run_async_operation(self, operation: str, *args, **kwargs):
-        """Run async operation in sync context."""
         try:
             try:
-                loop = asyncio.get_running_loop()
-                import concurrent.futures
-
-                def run_in_thread():
-                    new_loop = asyncio.new_event_loop()
-                    asyncio.set_event_loop(new_loop)
-                    try:
-                        return new_loop.run_until_complete(
-                            self._execute_with_client(operation, *args, **kwargs)
-                        )
-                    finally:
-                        new_loop.close()
-
+                asyncio.get_running_loop()
                 with concurrent.futures.ThreadPoolExecutor() as executor:
-                    future = executor.submit(run_in_thread)
+                    future = executor.submit(
+                        self._run_in_new_loop, operation, *args, **kwargs
+                    )
                     return future.result(timeout=self.timeout)
             except RuntimeError:
-                loop = asyncio.new_event_loop()
-                asyncio.set_event_loop(loop)
-                try:
-                    return loop.run_until_complete(
-                        self._execute_with_client(operation, *args, **kwargs)
-                    )
-                finally:
-                    loop.close()
+                return self._run_in_new_loop(operation, *args, **kwargs)
         except Exception as e:
-            print(f"Error occurred while running async operation: {e}")
-            raise
+            raise self._map_error(operation, e) from e
+            raise self._map_error(operation, e) from e
+
+    def _run_in_new_loop(self, operation, *args, **kwargs):
+        loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
+        try:
+            return loop.run_until_complete(
+                self._execute_with_client(operation, *args, **kwargs)
+            )
+        finally:
+            loop.close()
+
+    def _map_error(self, operation: str, exc: Exception) -> Exception:
+        for exc_type, msg_fn in self._ERROR_MAP:
+            if isinstance(exc, exc_type):
+                return Exception(msg_fn(operation, self.timeout, exc))
+        error_msg = str(exc)
+        for patterns, friendly in self._ERROR_PATTERNS.items():
+            if any(p.lower() in error_msg.lower() for p in patterns):
+                return Exception(friendly)
+        logger.error("MCP %s failed: %s", operation, exc)
+        return exc
 
     def discover_tools(self) -> List[Dict]:
         """
@@ -283,16 +342,6 @@ class MCPTool(Tool):
             raise Exception(f"Failed to discover tools from MCP server: {str(e)}")
 
     def execute_action(self, action_name: str, **kwargs) -> Any:
-        """
-        Execute an action on the remote MCP server using FastMCP.
-
-        Args:
-            action_name: Name of the action to execute
-            **kwargs: Parameters for the action
-
-        Returns:
-            Result from the MCP server
-        """
         if not self.server_url:
             raise Exception("No MCP server configured")
         if not self._client:
@@ -308,7 +357,37 @@ class MCPTool(Tool):
             )
             return self._format_result(result)
         except Exception as e:
-            raise Exception(f"Failed to execute action '{action_name}': {str(e)}")
+            error_msg = str(e)
+            lower_msg = error_msg.lower()
+            is_auth_error = (
+                "401" in error_msg
+                or "unauthorized" in lower_msg
+                or "session expired" in lower_msg
+                or "re-authorize" in lower_msg
+            )
+            if is_auth_error:
+                if self.auth_type == "oauth":
+                    raise Exception(
+                        f"Action '{action_name}' failed: OAuth session expired. "
+                        "Please re-authorize this MCP server in tool settings."
+                    ) from e
+                global _mcp_clients_cache
+                _mcp_clients_cache.pop(self._cache_key, None)
+                self._client = None
+                self._setup_client()
+                try:
+                    result = self._run_async_operation(
+                        "call_tool", action_name, **cleaned_kwargs
+                    )
+                    return self._format_result(result)
+                except Exception as retry_e:
+                    raise Exception(
+                        f"Action '{action_name}' failed after re-auth attempt: {retry_e}. "
+                        "Your credentials may have expired — please re-authorize in tool settings."
+                    ) from retry_e
+            raise Exception(
+                f"Failed to execute action '{action_name}': {error_msg}"
+            ) from e
 
     def _format_result(self, result) -> Dict:
         """Format FastMCP result to match expected format."""
@@ -331,23 +410,35 @@ class MCPTool(Tool):
             return result
 
     def test_connection(self) -> Dict:
-        """
-        Test the connection to the MCP server and validate functionality.
-
-        Returns:
-            Dictionary with connection test results including tool count
-        """
         if not self.server_url:
             return {
                 "success": False,
-                "message": "No MCP server URL configured",
+                "message": "No server URL configured",
+                "tools_count": 0,
+            }
+        try:
+            parsed = urlparse(self.server_url)
+            if parsed.scheme not in ("http", "https"):
+                return {
+                    "success": False,
+                    "message": f"Invalid URL scheme '{parsed.scheme}' — use http:// or https://",
+                    "tools_count": 0,
+                }
+        except Exception:
+            return {
+                "success": False,
+                "message": "Invalid URL format",
                 "tools_count": 0,
-                "transport_type": self.transport_type,
-                "auth_type": self.auth_type,
-                "error_type": "ConfigurationError",
             }
         if not self._client:
-            self._setup_client()
+            try:
+                self._setup_client()
+            except Exception as e:
+                return {
+                    "success": False,
+                    "message": f"Client init failed: {str(e)}",
+                    "tools_count": 0,
+                }
         try:
             if self.auth_type == "oauth":
                 return self._test_oauth_connection()
@@ -358,56 +449,94 @@ class MCPTool(Tool):
                 "success": False,
                 "message": f"Connection failed: {str(e)}",
                 "tools_count": 0,
-                "transport_type": self.transport_type,
-                "auth_type": self.auth_type,
-                "error_type": type(e).__name__,
             }
 
     def _test_regular_connection(self) -> Dict:
-        """Test connection for non-OAuth auth types."""
+        ping_ok = False
+        ping_error = None
         try:
             self._run_async_operation("ping")
-            ping_success = True
-        except Exception:
-            ping_success = False
-        tools = self.discover_tools()
+            ping_ok = True
+        except Exception as e:
+            ping_error = str(e)
 
-        message = f"Successfully connected to MCP server. Found {len(tools)} tools."
-        if not ping_success:
-            message += " (Ping not supported, but tool discovery worked)"
-        return {
-            "success": True,
-            "message": message,
-            "tools_count": len(tools),
-            "transport_type": self.transport_type,
-            "auth_type": self.auth_type,
-            "ping_supported": ping_success,
-            "tools": [tool.get("name", "unknown") for tool in tools],
-        }
-
-    def _test_oauth_connection(self) -> Dict:
-        """Test connection for OAuth auth type with proper async handling."""
         try:
-            task = mcp_oauth_task.delay(config=self.config, user=self.user_id)
-            if not task:
-                raise Exception("Failed to start OAuth authentication")
-            return {
-                "success": True,
-                "requires_oauth": True,
-                "task_id": task.id,
-                "status": "pending",
-                "message": "OAuth flow started",
-            }
+            tools = self.discover_tools()
         except Exception as e:
             return {
                 "success": False,
-                "message": f"OAuth connection failed: {str(e)}",
+                "message": f"Connection failed: {ping_error or str(e)}",
                 "tools_count": 0,
-                "transport_type": self.transport_type,
-                "auth_type": self.auth_type,
-                "error_type": type(e).__name__,
             }
 
+        if not tools and not ping_ok:
+            return {
+                "success": False,
+                "message": f"Connection failed: {ping_error or 'No tools found'}",
+                "tools_count": 0,
+            }
+
+        return {
+            "success": True,
+            "message": f"Connected — found {len(tools)} tool{'s' if len(tools) != 1 else ''}.",
+            "tools_count": len(tools),
+            "tools": [
+                {
+                    "name": tool.get("name", "unknown"),
+                    "description": tool.get("description", ""),
+                }
+                for tool in tools
+            ],
+        }
+
+    def _test_oauth_connection(self) -> Dict:
+        storage = DBTokenStorage(
+            server_url=self.server_url, user_id=self.user_id, db_client=db
+        )
+        loop = asyncio.new_event_loop()
+        try:
+            tokens = loop.run_until_complete(storage.get_tokens())
+        finally:
+            loop.close()
+
+        if tokens and tokens.access_token:
+            self.query_mode = True
+            _mcp_clients_cache.pop(self._cache_key, None)
+            self._client = None
+            self._setup_client()
+            try:
+                tools = self.discover_tools()
+                return {
+                    "success": True,
+                    "message": f"Connected — found {len(tools)} tool{'s' if len(tools) != 1 else ''}.",
+                    "tools_count": len(tools),
+                    "tools": [
+                        {
+                            "name": t.get("name", "unknown"),
+                            "description": t.get("description", ""),
+                        }
+                        for t in tools
+                    ],
+                }
+            except Exception as e:
+                logger.warning("OAuth token validation failed: %s", e)
+                _mcp_clients_cache.pop(self._cache_key, None)
+                self._client = None
+
+        return self._start_oauth_task()
+
+    def _start_oauth_task(self) -> Dict:
+        task_config = self.config.copy()
+        task_config.pop("query_mode", None)
+        result = mcp_oauth_task.delay(task_config, self.user_id)
+        return {
+            "success": False,
+            "requires_oauth": True,
+            "task_id": result.id,
+            "message": "OAuth authorization required.",
+            "tools_count": 0,
+        }
+
     def get_actions_metadata(self) -> List[Dict]:
         """
         Get metadata for all available actions.
@@ -453,107 +582,88 @@ class MCPTool(Tool):
         return actions
 
     def get_config_requirements(self) -> Dict:
-        """Get configuration requirements for the MCP tool."""
         return {
             "server_url": {
                 "type": "string",
-                "description": "URL of the remote MCP server (e.g., https://api.example.com/mcp or https://docs.mcp.cloudflare.com/sse)",
+                "label": "Server URL",
+                "description": "URL of the remote MCP server",
                 "required": True,
-            },
-            "transport_type": {
-                "type": "string",
-                "description": "Transport type for connection",
-                "enum": ["auto", "sse", "http", "stdio"],
-                "default": "auto",
-                "required": False,
-                "help": {
-                    "auto": "Automatically detect best transport",
-                    "sse": "Server-Sent Events (for real-time streaming)",
-                    "http": "HTTP streaming (recommended for production)",
-                    "stdio": "Standard I/O (for local servers)",
-                },
+                "secret": False,
+                "order": 1,
             },
             "auth_type": {
                 "type": "string",
-                "description": "Authentication type",
+                "label": "Authentication Type",
+                "description": "Authentication method for the MCP server",
                 "enum": ["none", "bearer", "oauth", "api_key", "basic"],
                 "default": "none",
                 "required": True,
-                "help": {
-                    "none": "No authentication",
-                    "bearer": "Bearer token authentication",
-                    "oauth": "OAuth 2.1 authentication (with frontend integration)",
-                    "api_key": "API key authentication",
-                    "basic": "Basic authentication",
-                },
+                "secret": False,
+                "order": 2,
             },
-            "auth_credentials": {
-                "type": "object",
-                "description": "Authentication credentials (varies by auth_type)",
+            "api_key": {
+                "type": "string",
+                "label": "API Key",
+                "description": "API key for authentication",
                 "required": False,
-                "properties": {
-                    "bearer_token": {
-                        "type": "string",
-                        "description": "Bearer token for bearer auth",
-                    },
-                    "access_token": {
-                        "type": "string",
-                        "description": "Access token for OAuth (if pre-obtained)",
-                    },
-                    "api_key": {
-                        "type": "string",
-                        "description": "API key for api_key auth",
-                    },
-                    "api_key_header": {
-                        "type": "string",
-                        "description": "Header name for API key (default: X-API-Key)",
-                    },
-                    "username": {
-                        "type": "string",
-                        "description": "Username for basic auth",
-                    },
-                    "password": {
-                        "type": "string",
-                        "description": "Password for basic auth",
-                    },
-                },
+                "secret": True,
+                "order": 3,
+                "depends_on": {"auth_type": "api_key"},
+            },
+            "api_key_header": {
+                "type": "string",
+                "label": "API Key Header",
+                "description": "Header name for API key (default: X-API-Key)",
+                "default": "X-API-Key",
+                "required": False,
+                "secret": False,
+                "order": 4,
+                "depends_on": {"auth_type": "api_key"},
+            },
+            "bearer_token": {
+                "type": "string",
+                "label": "Bearer Token",
+                "description": "Bearer token for authentication",
+                "required": False,
+                "secret": True,
+                "order": 3,
+                "depends_on": {"auth_type": "bearer"},
+            },
+            "username": {
+                "type": "string",
+                "label": "Username",
+                "description": "Username for basic authentication",
+                "required": False,
+                "secret": False,
+                "order": 3,
+                "depends_on": {"auth_type": "basic"},
+            },
+            "password": {
+                "type": "string",
+                "label": "Password",
+                "description": "Password for basic authentication",
+                "required": False,
+                "secret": True,
+                "order": 4,
+                "depends_on": {"auth_type": "basic"},
             },
             "oauth_scopes": {
-                "type": "array",
-                "description": "OAuth scopes to request (for oauth auth_type)",
-                "items": {"type": "string"},
-                "required": False,
-                "default": [],
-            },
-            "oauth_client_name": {
                 "type": "string",
-                "description": "Client name for OAuth registration (for oauth auth_type)",
-                "default": "DocsGPT-MCP",
-                "required": False,
-            },
-            "headers": {
-                "type": "object",
-                "description": "Custom headers to send with requests",
+                "label": "OAuth Scopes",
+                "description": "Comma-separated OAuth scopes to request",
                 "required": False,
+                "secret": False,
+                "order": 3,
+                "depends_on": {"auth_type": "oauth"},
             },
             "timeout": {
-                "type": "integer",
-                "description": "Request timeout in seconds",
+                "type": "number",
+                "label": "Timeout (seconds)",
+                "description": "Request timeout in seconds (1-300)",
                 "default": 30,
-                "minimum": 1,
-                "maximum": 300,
-                "required": False,
-            },
-            "command": {
-                "type": "string",
-                "description": "Command to run for STDIO transport (e.g., 'python')",
-                "required": False,
-            },
-            "args": {
-                "type": "array",
-                "description": "Arguments for STDIO command",
-                "items": {"type": "string"},
                 "required": False,
+                "secret": False,
+                "order": 10,
             },
         }
 
@@ -575,23 +685,8 @@ class DocsGPTOAuth(OAuthClientProvider):
         user_id=None,
         db=None,
         additional_client_metadata: dict[str, Any] | None = None,
+        skip_redirect_validation: bool = False,
     ):
-        """
-        Initialize custom OAuth client provider for DocsGPT.
-
-        Args:
-            mcp_url: Full URL to the MCP endpoint
-            redirect_uri: Custom redirect URI for DocsGPT frontend
-            redis_client: Redis client for storing auth state
-            redis_prefix: Prefix for Redis keys
-            task_id: Task ID for tracking auth status
-            scopes: OAuth scopes to request
-            client_name: Name for this client during registration
-            user_id: User ID for token storage
-            db: Database instance for token storage
-            additional_client_metadata: Extra fields for OAuthClientMetadata
-        """
-
         self.redirect_uri = redirect_uri
         self.redis_client = redis_client
         self.redis_prefix = redis_prefix
@@ -614,7 +709,10 @@ class DocsGPTOAuth(OAuthClientProvider):
         )
 
         storage = DBTokenStorage(
-            server_url=self.server_base_url, user_id=self.user_id, db_client=self.db
+            server_url=self.server_base_url,
+            user_id=self.user_id,
+            db_client=self.db,
+            expected_redirect_uri=None if skip_redirect_validation else redirect_uri,
         )
 
         super().__init__(
@@ -646,22 +744,20 @@ class DocsGPTOAuth(OAuthClientProvider):
     async def redirect_handler(self, authorization_url: str) -> None:
         """Store auth URL and state in Redis for frontend to use."""
         auth_url, state = self._process_auth_url(authorization_url)
-        logging.info(
-            "[DocsGPTOAuth] Processed auth_url: %s, state: %s", auth_url, state
-        )
+        logger.info("Processed auth_url: %s, state: %s", auth_url, state)
         self.auth_url = auth_url
         self.extracted_state = state
 
         if self.redis_client and self.extracted_state:
             key = f"{self.redis_prefix}auth_url:{self.extracted_state}"
             self.redis_client.setex(key, 600, auth_url)
-            logging.info("[DocsGPTOAuth] Stored auth_url in Redis: %s", key)
+            logger.info("Stored auth_url in Redis: %s", key)
 
             if self.task_id:
                 status_key = f"mcp_oauth_status:{self.task_id}"
                 status_data = {
                     "status": "requires_redirect",
-                    "message": "OAuth authorization required",
+                    "message": "Authorization required",
                     "authorization_url": self.auth_url,
                     "state": self.extracted_state,
                     "requires_oauth": True,
@@ -681,7 +777,7 @@ class DocsGPTOAuth(OAuthClientProvider):
             status_key = f"mcp_oauth_status:{self.task_id}"
             status_data = {
                 "status": "awaiting_callback",
-                "message": "Waiting for OAuth callback...",
+                "message": "Waiting for authorization...",
                 "authorization_url": self.auth_url,
                 "state": self.extracted_state,
                 "requires_oauth": True,
@@ -706,7 +802,7 @@ class DocsGPTOAuth(OAuthClientProvider):
                 if self.task_id:
                     status_data = {
                         "status": "callback_received",
-                        "message": "OAuth callback received, completing authentication...",
+                        "message": "Completing authentication...",
                         "task_id": self.task_id,
                     }
                     self.redis_client.setex(status_key, 600, json.dumps(status_data))
@@ -726,14 +822,44 @@ class DocsGPTOAuth(OAuthClientProvider):
             await asyncio.sleep(poll_interval)
         self.redis_client.delete(f"{self.redis_prefix}auth_url:{self.extracted_state}")
         self.redis_client.delete(f"{self.redis_prefix}state:{self.extracted_state}")
-        raise Exception("OAuth callback timeout: no code received within 5 minutes")
+        raise Exception("OAuth timeout: no code received within 5 minutes")
+
+
+class NonInteractiveOAuth(DocsGPTOAuth):
+    """OAuth provider that fails fast on 401 instead of starting interactive auth.
+
+    Used during query execution to prevent the streaming response from blocking
+    while waiting for user authorization that will never come.
+    """
+
+    def __init__(self, **kwargs):
+        kwargs.setdefault("task_id", None)
+        kwargs["skip_redirect_validation"] = True
+        super().__init__(**kwargs)
+
+    async def redirect_handler(self, authorization_url: str) -> None:
+        raise Exception(
+            "OAuth session expired — please re-authorize this MCP server in tool settings."
+        )
+
+    async def callback_handler(self) -> tuple[str, str | None]:
+        raise Exception(
+            "OAuth session expired — please re-authorize this MCP server in tool settings."
+        )
 
 
 class DBTokenStorage(TokenStorage):
-    def __init__(self, server_url: str, user_id: str, db_client):
+    def __init__(
+        self,
+        server_url: str,
+        user_id: str,
+        db_client,
+        expected_redirect_uri: Optional[str] = None,
+    ):
         self.server_url = server_url
         self.user_id = user_id
         self.db_client = db_client
+        self.expected_redirect_uri = expected_redirect_uri
         self.collection = db_client["connector_sessions"]
 
     @staticmethod
@@ -752,10 +878,9 @@ class DBTokenStorage(TokenStorage):
         if not doc or "tokens" not in doc:
             return None
         try:
-            tokens = OAuthToken.model_validate(doc["tokens"])
-            return tokens
+            return OAuthToken.model_validate(doc["tokens"])
         except ValidationError as e:
-            logging.error(f"Could not load tokens: {e}")
+            logger.error("Could not load tokens: %s", e)
             return None
 
     async def set_tokens(self, tokens: OAuthToken) -> None:
@@ -765,28 +890,38 @@ class DBTokenStorage(TokenStorage):
             {"$set": {"tokens": tokens.model_dump()}},
             True,
         )
-        logging.info(f"Saved tokens for {self.get_base_url(self.server_url)}")
+        logger.info("Saved tokens for %s", self.get_base_url(self.server_url))
 
     async def get_client_info(self) -> OAuthClientInformationFull | None:
         doc = await asyncio.to_thread(self.collection.find_one, self.get_db_key())
         if not doc or "client_info" not in doc:
+            logger.debug(
+                "No client_info in DB for %s", self.get_base_url(self.server_url)
+            )
             return None
         try:
             client_info = OAuthClientInformationFull.model_validate(doc["client_info"])
-            tokens = await self.get_tokens()
-            if tokens is None:
-                logging.debug(
-                    "No tokens found, clearing client info to force fresh registration."
-                )
-                await asyncio.to_thread(
-                    self.collection.update_one,
-                    self.get_db_key(),
-                    {"$unset": {"client_info": ""}},
-                )
-                return None
+            if self.expected_redirect_uri:
+                stored_uris = [
+                    str(uri).rstrip("/") for uri in client_info.redirect_uris
+                ]
+                expected_uri = self.expected_redirect_uri.rstrip("/")
+                if expected_uri not in stored_uris:
+                    logger.warning(
+                        "Redirect URI mismatch for %s: expected=%s stored=%s — clearing.",
+                        self.get_base_url(self.server_url),
+                        expected_uri,
+                        stored_uris,
+                    )
+                    await asyncio.to_thread(
+                        self.collection.update_one,
+                        self.get_db_key(),
+                        {"$unset": {"client_info": "", "tokens": ""}},
+                    )
+                    return None
             return client_info
         except ValidationError as e:
-            logging.error(f"Could not load client info: {e}")
+            logger.error("Could not load client info: %s", e)
             return None
 
     def _serialize_client_info(self, info: dict) -> dict:
@@ -802,17 +937,17 @@ class DBTokenStorage(TokenStorage):
             {"$set": {"client_info": serialized_info}},
             True,
         )
-        logging.info(f"Saved client info for {self.get_base_url(self.server_url)}")
+        logger.info("Saved client info for %s", self.get_base_url(self.server_url))
 
     async def clear(self) -> None:
         await asyncio.to_thread(self.collection.delete_one, self.get_db_key())
-        logging.info(f"Cleared OAuth cache for {self.get_base_url(self.server_url)}")
+        logger.info("Cleared OAuth cache for %s", self.get_base_url(self.server_url))
 
     @classmethod
     async def clear_all(cls, db_client) -> None:
         collection = db_client["connector_sessions"]
         await asyncio.to_thread(collection.delete_many, {})
-        logging.info("Cleared all OAuth client cache data.")
+        logger.info("Cleared all OAuth client cache data.")
 
 
 class MCPOAuthManager:
@@ -851,7 +986,7 @@ class MCPOAuthManager:
 
             return True
         except Exception as e:
-            logging.error(f"Error handling OAuth callback: {e}")
+            logger.error("Error handling OAuth callback: %s", e)
             return False
 
     def get_oauth_status(self, task_id: str) -> Dict[str, Any]:

application/agents/tools/notes.py

@@ -38,6 +38,8 @@ class NotesTool(Tool):
         db = MongoDB.get_client()[settings.MONGO_DB_NAME]
         self.collection = db["notes"]
 
+        self._last_artifact_id: Optional[str] = None
+
     # -----------------------------
     # Action implementations
     # -----------------------------
@@ -54,6 +56,8 @@ class NotesTool(Tool):
         if not self.user_id:
              return "Error: NotesTool requires a valid user_id."
 
+        self._last_artifact_id = None
+
         if action_name == "view":
             return self._get_note()
 
@@ -125,6 +129,9 @@ class NotesTool(Tool):
         """Return configuration requirements (none for now)."""
         return {}
 
+    def get_artifact_id(self, action_name: str, **kwargs: Any) -> Optional[str]:
+        return self._last_artifact_id
+
     # -----------------------------
     # Internal helpers (single-note)
     # -----------------------------
@@ -132,17 +139,22 @@ class NotesTool(Tool):
         doc = self.collection.find_one({"user_id": self.user_id, "tool_id": self.tool_id})
         if not doc or not doc.get("note"):
             return "No note found."
+        if doc.get("_id") is not None:
+            self._last_artifact_id = str(doc.get("_id"))
         return str(doc["note"])
 
     def _overwrite_note(self, content: str) -> str:
         content = (content or "").strip()
         if not content:
             return "Note content required."
-        self.collection.update_one(
+        result = self.collection.find_one_and_update(
             {"user_id": self.user_id, "tool_id": self.tool_id},
             {"$set": {"note": content, "updated_at": datetime.utcnow()}},
-            upsert=True,  # ✅ create if missing
+            upsert=True,
+            return_document=True,
         )
+        if result and result.get("_id") is not None:
+            self._last_artifact_id = str(result.get("_id"))
         return "Note saved."
 
     def _str_replace(self, old_str: str, new_str: str) -> str:
@@ -163,10 +175,13 @@ class NotesTool(Tool):
         import re
         updated_note = re.sub(re.escape(old_str), new_str, current_note, flags=re.IGNORECASE)
 
-        self.collection.update_one(
+        result = self.collection.find_one_and_update(
             {"user_id": self.user_id, "tool_id": self.tool_id},
             {"$set": {"note": updated_note, "updated_at": datetime.utcnow()}},
+            return_document=True,
         )
+        if result and result.get("_id") is not None:
+            self._last_artifact_id = str(result.get("_id"))
         return "Note updated."
 
     def _insert(self, line_number: int, text: str) -> str:
@@ -188,12 +203,21 @@ class NotesTool(Tool):
         lines.insert(index, text)
         updated_note = "\n".join(lines)
 
-        self.collection.update_one(
+        result = self.collection.find_one_and_update(
             {"user_id": self.user_id, "tool_id": self.tool_id},
             {"$set": {"note": updated_note, "updated_at": datetime.utcnow()}},
+            return_document=True,
         )
+        if result and result.get("_id") is not None:
+            self._last_artifact_id = str(result.get("_id"))
         return "Text inserted."
 
     def _delete_note(self) -> str:
-        res = self.collection.delete_one({"user_id": self.user_id, "tool_id": self.tool_id})
-        return "Note deleted." if res.deleted_count else "No note found to delete."
+        doc = self.collection.find_one_and_delete(
+            {"user_id": self.user_id, "tool_id": self.tool_id}
+        )
+        if not doc:
+            return "No note found to delete."
+        if doc.get("_id") is not None:
+            self._last_artifact_id = str(doc.get("_id"))
+        return "Note deleted."

application/agents/tools/ntfy.py

@@ -71,7 +71,7 @@ class NtfyTool(Tool):
         if self.token:
             headers["Authorization"] = f"Basic {self.token}"
         data = message.encode("utf-8")
-        response = requests.post(url, headers=headers, data=data)
+        response = requests.post(url, headers=headers, data=data, timeout=100)
         return {"status_code": response.status_code, "message": "Message sent"}
 
     def get_actions_metadata(self):
@@ -116,12 +116,13 @@ class NtfyTool(Tool):
         ]
 
     def get_config_requirements(self):
-        """
-        Specify the configuration requirements.
-
-        Returns:
-            dict: Dictionary describing required config parameters.
-        """
         return {
-            "token": {"type": "string", "description": "Access token for authentication"},
+            "token": {
+                "type": "string",
+                "label": "Access Token",
+                "description": "Ntfy access token for authentication",
+                "required": True,
+                "secret": True,
+                "order": 1,
+            },
         }

application/agents/tools/postgres.py

@@ -1,6 +1,12 @@
-import psycopg2
+import logging
+
+import psycopg
+
 from application.agents.tools.base import Tool
 
+logger = logging.getLogger(__name__)
+
+
 class PostgresTool(Tool):
     """
     PostgreSQL Database Tool
@@ -17,25 +23,25 @@ class PostgresTool(Tool):
             "postgres_execute_sql": self._execute_sql,
             "postgres_get_schema": self._get_schema,
         }
-
-        if action_name in actions:
-            return actions[action_name](**kwargs)
-        else:
+        if action_name not in actions:
             raise ValueError(f"Unknown action: {action_name}")
+        return actions[action_name](**kwargs)
 
     def _execute_sql(self, sql_query):
         """
         Executes an SQL query against the PostgreSQL database using a connection string.
         """
-        conn = None  # Initialize conn to None for error handling
+        conn = None
         try:
-            conn = psycopg2.connect(self.connection_string)
+            conn = psycopg.connect(self.connection_string)
             cur = conn.cursor()
             cur.execute(sql_query)
             conn.commit()
 
             if sql_query.strip().lower().startswith("select"):
-                column_names = [desc[0] for desc in cur.description] if cur.description else []
+                column_names = (
+                    [desc[0] for desc in cur.description] if cur.description else []
+                )
                 results = []
                 rows = cur.fetchall()
                 for row in rows:
@@ -43,7 +49,9 @@ class PostgresTool(Tool):
                 response_data = {"data": results, "column_names": column_names}
             else:
                 row_count = cur.rowcount
-                response_data = {"message": f"Query executed successfully, {row_count} rows affected."}
+                response_data = {
+                    "message": f"Query executed successfully, {row_count} rows affected."
+                }
 
             cur.close()
             return {
@@ -52,28 +60,29 @@ class PostgresTool(Tool):
                 "response_data": response_data,
             }
 
-        except psycopg2.Error as e:
+        except psycopg.Error as e:
             error_message = f"Database error: {e}"
-            print(f"Database error: {e}")
+            logger.error("PostgreSQL execute_sql error: %s", e)
             return {
                 "status_code": 500,
                 "message": "Failed to execute SQL query.",
                 "error": error_message,
             }
         finally:
-            if conn:  # Ensure connection is closed even if errors occur
+            if conn:
                 conn.close()
 
     def _get_schema(self, db_name):
         """
         Retrieves the schema of the PostgreSQL database using a connection string.
         """
-        conn = None # Initialize conn to None for error handling
+        conn = None
         try:
-            conn = psycopg2.connect(self.connection_string)
+            conn = psycopg.connect(self.connection_string)
             cur = conn.cursor()
 
-            cur.execute("""
+            cur.execute(
+                """
                 SELECT
                     table_name,
                     column_name,
@@ -87,19 +96,22 @@ class PostgresTool(Tool):
                 ORDER BY
                     table_name,
                     ordinal_position;
-            """)
+            """
+            )
 
             schema_data = {}
             for row in cur.fetchall():
                 table_name, column_name, data_type, column_default, is_nullable = row
                 if table_name not in schema_data:
                     schema_data[table_name] = []
-                schema_data[table_name].append({
-                    "column_name": column_name,
-                    "data_type": data_type,
-                    "column_default": column_default,
-                    "is_nullable": is_nullable
-                })
+                schema_data[table_name].append(
+                    {
+                        "column_name": column_name,
+                        "data_type": data_type,
+                        "column_default": column_default,
+                        "is_nullable": is_nullable,
+                    }
+                )
 
             cur.close()
             return {
@@ -108,16 +120,16 @@ class PostgresTool(Tool):
                 "schema": schema_data,
             }
 
-        except psycopg2.Error as e:
+        except psycopg.Error as e:
             error_message = f"Database error: {e}"
-            print(f"Database error: {e}")
+            logger.error("PostgreSQL get_schema error: %s", e)
             return {
                 "status_code": 500,
                 "message": "Failed to retrieve database schema.",
                 "error": error_message,
             }
         finally:
-            if conn: # Ensure connection is closed even if errors occur
+            if conn:
                 conn.close()
 
     def get_actions_metadata(self):
@@ -158,6 +170,10 @@ class PostgresTool(Tool):
         return {
             "token": {
                 "type": "string",
-                "description": "PostgreSQL database connection string (e.g., 'postgresql://user:password@host:port/dbname')",
+                "label": "Connection String",
+                "description": "PostgreSQL database connection string",
+                "required": True,
+                "secret": True,
+                "order": 1,
             },
-        }
+        }

application/agents/tools/read_webpage.py

@@ -1,7 +1,7 @@
 import requests
 from markdownify import markdownify
 from application.agents.tools.base import Tool
-from urllib.parse import urlparse
+from application.core.url_validation import validate_url, SSRFError
 
 class ReadWebpageTool(Tool):
     """
@@ -31,11 +31,12 @@ class ReadWebpageTool(Tool):
         if not url:
             return "Error: URL parameter is missing."
 
-        # Ensure the URL has a scheme (if not, default to http)
-        parsed_url = urlparse(url)
-        if not parsed_url.scheme:
-            url = "http://" + url
-        
+        # Validate URL to prevent SSRF attacks
+        try:
+            url = validate_url(url)
+        except SSRFError as e:
+            return f"Error: URL validation failed - {e}"
+
         try:
             response = requests.get(url, timeout=10, headers={'User-Agent': 'DocsGPT-Agent/1.0'})
             response.raise_for_status()  # Raise an exception for HTTP errors (4xx or 5xx)

application/agents/tools/spec_parser.py

@@ -0,0 +1,342 @@
+"""
+API Specification Parser
+
+Parses OpenAPI 3.x and Swagger 2.0 specifications and converts them
+to API Tool action definitions for use in DocsGPT.
+"""
+
+import json
+import logging
+import re
+from typing import Any, Dict, List, Optional, Tuple
+
+import yaml
+
+logger = logging.getLogger(__name__)
+
+SUPPORTED_METHODS = frozenset(
+    {"get", "post", "put", "delete", "patch", "head", "options"}
+)
+
+
+def parse_spec(spec_content: str) -> Tuple[Dict[str, Any], List[Dict[str, Any]]]:
+    """
+    Parse an API specification and convert operations to action definitions.
+
+    Supports OpenAPI 3.x and Swagger 2.0 formats in JSON or YAML.
+
+    Args:
+        spec_content: Raw specification content as string
+
+    Returns:
+        Tuple of (metadata dict, list of action dicts)
+
+    Raises:
+        ValueError: If the spec is invalid or uses an unsupported format
+    """
+    spec = _load_spec(spec_content)
+    _validate_spec(spec)
+
+    is_swagger = "swagger" in spec
+    metadata = _extract_metadata(spec, is_swagger)
+    actions = _extract_actions(spec, is_swagger)
+
+    return metadata, actions
+
+
+def _load_spec(content: str) -> Dict[str, Any]:
+    """Parse spec content from JSON or YAML string."""
+    content = content.strip()
+    if not content:
+        raise ValueError("Empty specification content")
+    try:
+        if content.startswith("{"):
+            return json.loads(content)
+        return yaml.safe_load(content)
+    except json.JSONDecodeError as e:
+        raise ValueError(f"Invalid JSON format: {e.msg}")
+    except yaml.YAMLError as e:
+        raise ValueError(f"Invalid YAML format: {e}")
+
+
+def _validate_spec(spec: Dict[str, Any]) -> None:
+    """Validate spec version and required fields."""
+    if not isinstance(spec, dict):
+        raise ValueError("Specification must be a valid object")
+    openapi_version = spec.get("openapi", "")
+    swagger_version = spec.get("swagger", "")
+
+    if not (openapi_version.startswith("3.") or swagger_version == "2.0"):
+        raise ValueError(
+            "Unsupported specification version. Expected OpenAPI 3.x or Swagger 2.0"
+        )
+    if "paths" not in spec or not spec["paths"]:
+        raise ValueError("No API paths defined in the specification")
+
+
+def _extract_metadata(spec: Dict[str, Any], is_swagger: bool) -> Dict[str, Any]:
+    """Extract API metadata from specification."""
+    info = spec.get("info", {})
+    base_url = _get_base_url(spec, is_swagger)
+
+    return {
+        "title": info.get("title", "Untitled API"),
+        "description": (info.get("description", "") or "")[:500],
+        "version": info.get("version", ""),
+        "base_url": base_url,
+    }
+
+
+def _get_base_url(spec: Dict[str, Any], is_swagger: bool) -> str:
+    """Extract base URL from spec (handles both OpenAPI 3.x and Swagger 2.0)."""
+    if is_swagger:
+        schemes = spec.get("schemes", ["https"])
+        host = spec.get("host", "")
+        base_path = spec.get("basePath", "")
+        if host:
+            scheme = schemes[0] if schemes else "https"
+            return f"{scheme}://{host}{base_path}".rstrip("/")
+        return ""
+    servers = spec.get("servers", [])
+    if servers and isinstance(servers, list) and servers[0].get("url"):
+        return servers[0]["url"].rstrip("/")
+    return ""
+
+
+def _extract_actions(spec: Dict[str, Any], is_swagger: bool) -> List[Dict[str, Any]]:
+    """Extract all API operations as action definitions."""
+    actions = []
+    paths = spec.get("paths", {})
+    base_url = _get_base_url(spec, is_swagger)
+
+    components = spec.get("components", {})
+    definitions = spec.get("definitions", {})
+
+    for path, path_item in paths.items():
+        if not isinstance(path_item, dict):
+            continue
+        path_params = path_item.get("parameters", [])
+
+        for method in SUPPORTED_METHODS:
+            operation = path_item.get(method)
+            if not isinstance(operation, dict):
+                continue
+            try:
+                action = _build_action(
+                    path=path,
+                    method=method,
+                    operation=operation,
+                    path_params=path_params,
+                    base_url=base_url,
+                    components=components,
+                    definitions=definitions,
+                    is_swagger=is_swagger,
+                )
+                actions.append(action)
+            except Exception as e:
+                logger.warning(
+                    f"Failed to parse operation {method.upper()} {path}: {e}"
+                )
+                continue
+    return actions
+
+
+def _build_action(
+    path: str,
+    method: str,
+    operation: Dict[str, Any],
+    path_params: List[Dict],
+    base_url: str,
+    components: Dict[str, Any],
+    definitions: Dict[str, Any],
+    is_swagger: bool,
+) -> Dict[str, Any]:
+    """Build a single action from an API operation."""
+    action_name = _generate_action_name(operation, method, path)
+    full_url = f"{base_url}{path}" if base_url else path
+
+    all_params = path_params + operation.get("parameters", [])
+    query_params, headers = _categorize_parameters(all_params, components, definitions)
+
+    body, body_content_type = _extract_request_body(
+        operation, components, definitions, is_swagger
+    )
+
+    description = operation.get("summary", "") or operation.get("description", "")
+
+    return {
+        "name": action_name,
+        "url": full_url,
+        "method": method.upper(),
+        "description": (description or "")[:500],
+        "query_params": {"type": "object", "properties": query_params},
+        "headers": {"type": "object", "properties": headers},
+        "body": {"type": "object", "properties": body},
+        "body_content_type": body_content_type,
+        "active": True,
+    }
+
+
+def _generate_action_name(operation: Dict[str, Any], method: str, path: str) -> str:
+    """Generate a valid action name from operationId or method+path."""
+    if operation.get("operationId"):
+        name = operation["operationId"]
+    else:
+        path_slug = re.sub(r"[{}]", "", path)
+        path_slug = re.sub(r"[^a-zA-Z0-9]", "_", path_slug)
+        path_slug = re.sub(r"_+", "_", path_slug).strip("_")
+        name = f"{method}_{path_slug}"
+    name = re.sub(r"[^a-zA-Z0-9_-]", "_", name)
+    return name[:64]
+
+
+def _categorize_parameters(
+    parameters: List[Dict],
+    components: Dict[str, Any],
+    definitions: Dict[str, Any],
+) -> Tuple[Dict, Dict]:
+    """Categorize parameters into query params and headers."""
+    query_params = {}
+    headers = {}
+
+    for param in parameters:
+        resolved = _resolve_ref(param, components, definitions)
+        if not resolved or "name" not in resolved:
+            continue
+        location = resolved.get("in", "query")
+        prop = _param_to_property(resolved)
+
+        if location in ("query", "path"):
+            query_params[resolved["name"]] = prop
+        elif location == "header":
+            headers[resolved["name"]] = prop
+    return query_params, headers
+
+
+def _param_to_property(param: Dict) -> Dict[str, Any]:
+    """Convert an API parameter to an action property definition."""
+    schema = param.get("schema", {})
+    param_type = schema.get("type", param.get("type", "string"))
+
+    mapped_type = "integer" if param_type in ("integer", "number") else "string"
+
+    return {
+        "type": mapped_type,
+        "description": (param.get("description", "") or "")[:200],
+        "value": "",
+        "filled_by_llm": param.get("required", False),
+        "required": param.get("required", False),
+    }
+
+
+def _extract_request_body(
+    operation: Dict[str, Any],
+    components: Dict[str, Any],
+    definitions: Dict[str, Any],
+    is_swagger: bool,
+) -> Tuple[Dict, str]:
+    """Extract request body schema and content type."""
+    content_types = [
+        "application/json",
+        "application/x-www-form-urlencoded",
+        "multipart/form-data",
+        "text/plain",
+        "application/xml",
+    ]
+
+    if is_swagger:
+        consumes = operation.get("consumes", [])
+        body_param = next(
+            (p for p in operation.get("parameters", []) if p.get("in") == "body"), None
+        )
+        if not body_param:
+            return {}, "application/json"
+        selected_type = consumes[0] if consumes else "application/json"
+        schema = body_param.get("schema", {})
+    else:
+        request_body = operation.get("requestBody", {})
+        if not request_body:
+            return {}, "application/json"
+        request_body = _resolve_ref(request_body, components, definitions)
+        content = request_body.get("content", {})
+
+        selected_type = "application/json"
+        schema = {}
+
+        for ct in content_types:
+            if ct in content:
+                selected_type = ct
+                schema = content[ct].get("schema", {})
+                break
+        if not schema and content:
+            first_type = next(iter(content))
+            selected_type = first_type
+            schema = content[first_type].get("schema", {})
+    properties = _schema_to_properties(schema, components, definitions)
+    return properties, selected_type
+
+
+def _schema_to_properties(
+    schema: Dict,
+    components: Dict[str, Any],
+    definitions: Dict[str, Any],
+    depth: int = 0,
+) -> Dict[str, Any]:
+    """Convert schema to action body properties (limited depth to prevent recursion)."""
+    if depth > 3:
+        return {}
+    schema = _resolve_ref(schema, components, definitions)
+    if not schema or not isinstance(schema, dict):
+        return {}
+    properties = {}
+    schema_type = schema.get("type", "object")
+
+    if schema_type == "object":
+        required_fields = set(schema.get("required", []))
+        for prop_name, prop_schema in schema.get("properties", {}).items():
+            resolved = _resolve_ref(prop_schema, components, definitions)
+            if not isinstance(resolved, dict):
+                continue
+            prop_type = resolved.get("type", "string")
+            mapped_type = "integer" if prop_type in ("integer", "number") else "string"
+
+            properties[prop_name] = {
+                "type": mapped_type,
+                "description": (resolved.get("description", "") or "")[:200],
+                "value": "",
+                "filled_by_llm": prop_name in required_fields,
+                "required": prop_name in required_fields,
+            }
+    return properties
+
+
+def _resolve_ref(
+    obj: Any,
+    components: Dict[str, Any],
+    definitions: Dict[str, Any],
+) -> Optional[Dict]:
+    """Resolve $ref references in the specification."""
+    if not isinstance(obj, dict):
+        return obj if isinstance(obj, dict) else None
+    if "$ref" not in obj:
+        return obj
+    ref_path = obj["$ref"]
+
+    if ref_path.startswith("#/components/"):
+        parts = ref_path.replace("#/components/", "").split("/")
+        return _traverse_path(components, parts)
+    elif ref_path.startswith("#/definitions/"):
+        parts = ref_path.replace("#/definitions/", "").split("/")
+        return _traverse_path(definitions, parts)
+    logger.debug(f"Unsupported ref path: {ref_path}")
+    return None
+
+
+def _traverse_path(obj: Dict, parts: List[str]) -> Optional[Dict]:
+    """Traverse a nested dictionary using path parts."""
+    try:
+        for part in parts:
+            obj = obj[part]
+        return obj if isinstance(obj, dict) else None
+    except (KeyError, TypeError):
+        return None

application/agents/tools/telegram.py

@@ -1,6 +1,11 @@
+import logging
+
 import requests
+
 from application.agents.tools.base import Tool
 
+logger = logging.getLogger(__name__)
+
 
 class TelegramTool(Tool):
     """
@@ -18,24 +23,22 @@ class TelegramTool(Tool):
             "telegram_send_message": self._send_message,
             "telegram_send_image": self._send_image,
         }
-
-        if action_name in actions:
-            return actions[action_name](**kwargs)
-        else:
+        if action_name not in actions:
             raise ValueError(f"Unknown action: {action_name}")
+        return actions[action_name](**kwargs)
 
     def _send_message(self, text, chat_id):
-        print(f"Sending message: {text}")
+        logger.debug("Sending Telegram message to chat_id=%s", chat_id)
         url = f"https://api.telegram.org/bot{self.token}/sendMessage"
         payload = {"chat_id": chat_id, "text": text}
-        response = requests.post(url, data=payload)
+        response = requests.post(url, data=payload, timeout=100)
         return {"status_code": response.status_code, "message": "Message sent"}
 
     def _send_image(self, image_url, chat_id):
-        print(f"Sending image: {image_url}")
+        logger.debug("Sending Telegram image to chat_id=%s", chat_id)
         url = f"https://api.telegram.org/bot{self.token}/sendPhoto"
         payload = {"chat_id": chat_id, "photo": image_url}
-        response = requests.post(url, data=payload)
+        response = requests.post(url, data=payload, timeout=100)
         return {"status_code": response.status_code, "message": "Image sent"}
 
     def get_actions_metadata(self):
@@ -82,5 +85,12 @@ class TelegramTool(Tool):
 
     def get_config_requirements(self):
         return {
-            "token": {"type": "string", "description": "Bot token for authentication"},
+            "token": {
+                "type": "string",
+                "label": "Bot Token",
+                "description": "Telegram bot token for authentication",
+                "required": True,
+                "secret": True,
+                "order": 1,
+            },
         }

application/agents/tools/think.py

@@ -0,0 +1,70 @@
+from application.agents.tools.base import Tool
+
+
+THINK_TOOL_ID = "think"
+
+THINK_TOOL_ENTRY = {
+    "name": "think",
+    "actions": [
+        {
+            "name": "reason",
+            "description": (
+                "Use this tool to think through your reasoning step by step "
+                "before deciding on your next action. Always reason before "
+                "searching or answering."
+            ),
+            "active": True,
+            "parameters": {
+                "properties": {
+                    "reasoning": {
+                        "type": "string",
+                        "description": "Your step-by-step reasoning and analysis",
+                        "filled_by_llm": True,
+                        "required": True,
+                    }
+                }
+            },
+        }
+    ],
+}
+
+
+class ThinkTool(Tool):
+    """Pseudo-tool that captures chain-of-thought reasoning.
+
+    Returns a short acknowledgment so the LLM can continue.
+    The reasoning content is captured in tool_call data for transparency.
+    """
+
+    internal = True
+
+    def __init__(self, config=None):
+        pass
+
+    def execute_action(self, action_name: str, **kwargs):
+        return "Continue."
+
+    def get_actions_metadata(self):
+        return [
+            {
+                "name": "reason",
+                "description": (
+                    "Use this tool to think through your reasoning step by step "
+                    "before deciding on your next action. Always reason before "
+                    "searching or answering."
+                ),
+                "parameters": {
+                    "properties": {
+                        "reasoning": {
+                            "type": "string",
+                            "description": "Your step-by-step reasoning and analysis",
+                            "filled_by_llm": True,
+                            "required": True,
+                        }
+                    }
+                },
+            }
+        ]
+
+    def get_config_requirements(self):
+        return {}

application/agents/tools/todo_list.py

@@ -38,6 +38,8 @@ class TodoListTool(Tool):
         db = MongoDB.get_client()[settings.MONGO_DB_NAME]
         self.collection = db["todos"]
 
+        self._last_artifact_id: Optional[str] = None
+
     # -----------------------------
     # Action implementations
     # -----------------------------
@@ -54,6 +56,8 @@ class TodoListTool(Tool):
         if not self.user_id:
             return "Error: TodoListTool requires a valid user_id."
 
+        self._last_artifact_id = None
+
         if action_name == "list":
             return self._list()
 
@@ -165,6 +169,9 @@ class TodoListTool(Tool):
         """Return configuration requirements."""
         return {}
 
+    def get_artifact_id(self, action_name: str, **kwargs: Any) -> Optional[str]:
+        return self._last_artifact_id
+
     # -----------------------------
     # Internal helpers
     # -----------------------------
@@ -190,11 +197,8 @@ class TodoListTool(Tool):
         Returns a simple integer (1, 2, 3, ...) scoped to this user/tool.
         With 5-10 todos max, scanning is negligible.
         """
-        # Find all todos for this user/tool and get their IDs
-        todos = list(self.collection.find(
-            {"user_id": self.user_id, "tool_id": self.tool_id},
-            {"todo_id": 1}
-        ))
+        query = {"user_id": self.user_id, "tool_id": self.tool_id}
+        todos = list(self.collection.find(query, {"todo_id": 1}))
 
         # Find the maximum todo_id
         max_id = 0
@@ -207,8 +211,8 @@ class TodoListTool(Tool):
 
     def _list(self) -> str:
         """List all todos for the user."""
-        cursor = self.collection.find({"user_id": self.user_id, "tool_id": self.tool_id})
-        todos = list(cursor)
+        query = {"user_id": self.user_id, "tool_id": self.tool_id}
+        todos = list(self.collection.find(query))
 
         if not todos:
             return "No todos found."
@@ -242,7 +246,10 @@ class TodoListTool(Tool):
             "created_at": now,
             "updated_at": now,
         }
-        self.collection.insert_one(doc)
+        insert_result = self.collection.insert_one(doc)
+        inserted_id = getattr(insert_result, "inserted_id", None) or doc.get("_id")
+        if inserted_id is not None:
+            self._last_artifact_id = str(inserted_id)
         return f"Todo created with ID {todo_id}: {title}"
 
     def _get(self, todo_id: Optional[Any]) -> str:
@@ -251,15 +258,15 @@ class TodoListTool(Tool):
         if parsed_todo_id is None:
             return "Error: todo_id must be a positive integer."
 
-        doc = self.collection.find_one({
-            "user_id": self.user_id,
-            "tool_id": self.tool_id,
-            "todo_id": parsed_todo_id
-        })
+        query = {"user_id": self.user_id, "tool_id": self.tool_id, "todo_id": parsed_todo_id}
+        doc = self.collection.find_one(query)
 
         if not doc:
             return f"Error: Todo with ID {parsed_todo_id} not found."
 
+        if doc.get("_id") is not None:
+            self._last_artifact_id = str(doc.get("_id"))
+
         title = doc.get("title", "Untitled")
         status = doc.get("status", "open")
 
@@ -277,14 +284,17 @@ class TodoListTool(Tool):
         if not title:
             return "Error: Title is required."
 
-        result = self.collection.update_one(
-            {"user_id": self.user_id, "tool_id": self.tool_id, "todo_id": parsed_todo_id},
-            {"$set": {"title": title, "updated_at": datetime.now()}}
+        query = {"user_id": self.user_id, "tool_id": self.tool_id, "todo_id": parsed_todo_id}
+        doc = self.collection.find_one_and_update(
+            query,
+            {"$set": {"title": title, "updated_at": datetime.now()}},
         )
-
-        if result.matched_count == 0:
+        if not doc:
             return f"Error: Todo with ID {parsed_todo_id} not found."
 
+        if doc.get("_id") is not None:
+            self._last_artifact_id = str(doc.get("_id"))
+
         return f"Todo {parsed_todo_id} updated to: {title}"
 
     def _complete(self, todo_id: Optional[Any]) -> str:
@@ -293,14 +303,17 @@ class TodoListTool(Tool):
         if parsed_todo_id is None:
             return "Error: todo_id must be a positive integer."
 
-        result = self.collection.update_one(
-            {"user_id": self.user_id, "tool_id": self.tool_id, "todo_id": parsed_todo_id},
-            {"$set": {"status": "completed", "updated_at": datetime.now()}}
+        query = {"user_id": self.user_id, "tool_id": self.tool_id, "todo_id": parsed_todo_id}
+        doc = self.collection.find_one_and_update(
+            query,
+            {"$set": {"status": "completed", "updated_at": datetime.now()}},
         )
-
-        if result.matched_count == 0:
+        if not doc:
             return f"Error: Todo with ID {parsed_todo_id} not found."
 
+        if doc.get("_id") is not None:
+            self._last_artifact_id = str(doc.get("_id"))
+
         return f"Todo {parsed_todo_id} marked as completed."
 
     def _delete(self, todo_id: Optional[Any]) -> str:
@@ -309,13 +322,12 @@ class TodoListTool(Tool):
         if parsed_todo_id is None:
             return "Error: todo_id must be a positive integer."
 
-        result = self.collection.delete_one({
-            "user_id": self.user_id,
-            "tool_id": self.tool_id,
-            "todo_id": parsed_todo_id
-        })
-
-        if result.deleted_count == 0:
+        query = {"user_id": self.user_id, "tool_id": self.tool_id, "todo_id": parsed_todo_id}
+        doc = self.collection.find_one_and_delete(query)
+        if not doc:
             return f"Error: Todo with ID {parsed_todo_id} not found."
 
+        if doc.get("_id") is not None:
+            self._last_artifact_id = str(doc.get("_id"))
+
         return f"Todo {parsed_todo_id} deleted."

application/agents/tools/tool_action_parser.py

@@ -5,8 +5,9 @@ logger = logging.getLogger(__name__)
 
 
 class ToolActionParser:
-    def __init__(self, llm_type):
+    def __init__(self, llm_type, name_mapping=None):
         self.llm_type = llm_type
+        self.name_mapping = name_mapping
         self.parsers = {
             "OpenAILLM": self._parse_openai_llm,
             "GoogleLLM": self._parse_google_llm,
@@ -16,22 +17,33 @@ class ToolActionParser:
         parser = self.parsers.get(self.llm_type, self._parse_openai_llm)
         return parser(call)
 
+    def _resolve_via_mapping(self, call_name):
+        """Look up (tool_id, action_name) from the name mapping if available."""
+        if self.name_mapping and call_name in self.name_mapping:
+            return self.name_mapping[call_name]
+        return None
+
     def _parse_openai_llm(self, call):
         try:
             call_args = json.loads(call.arguments)
+
+            resolved = self._resolve_via_mapping(call.name)
+            if resolved:
+                return resolved[0], resolved[1], call_args
+
+            # Fallback: legacy split on "_" for backward compatibility
             tool_parts = call.name.split("_")
 
-            # If the tool name doesn't contain an underscore, it's likely a hallucinated tool
             if len(tool_parts) < 2:
                 logger.warning(
-                    f"Invalid tool name format: {call.name}. Expected format: action_name_tool_id"
+                    f"Invalid tool name format: {call.name}. "
+                    "Could not resolve via mapping or legacy parsing."
                 )
                 return None, None, None
 
             tool_id = tool_parts[-1]
             action_name = "_".join(tool_parts[:-1])
 
-            # Validate that tool_id looks like a numerical ID
             if not tool_id.isdigit():
                 logger.warning(
                     f"Tool ID '{tool_id}' is not numerical. This might be a hallucinated tool call."
@@ -45,19 +57,24 @@ class ToolActionParser:
     def _parse_google_llm(self, call):
         try:
             call_args = call.arguments
+
+            resolved = self._resolve_via_mapping(call.name)
+            if resolved:
+                return resolved[0], resolved[1], call_args
+
+            # Fallback: legacy split on "_" for backward compatibility
             tool_parts = call.name.split("_")
 
-            # If the tool name doesn't contain an underscore, it's likely a hallucinated tool
             if len(tool_parts) < 2:
                 logger.warning(
-                    f"Invalid tool name format: {call.name}. Expected format: action_name_tool_id"
+                    f"Invalid tool name format: {call.name}. "
+                    "Could not resolve via mapping or legacy parsing."
                 )
                 return None, None, None
 
             tool_id = tool_parts[-1]
             action_name = "_".join(tool_parts[:-1])
 
-            # Validate that tool_id looks like a numerical ID
             if not tool_id.isdigit():
                 logger.warning(
                     f"Tool ID '{tool_id}' is not numerical. This might be a hallucinated tool call."

application/agents/tools/tool_manager.py

@@ -19,7 +19,7 @@ class ToolManager:
                 continue
             module = importlib.import_module(f"application.agents.tools.{name}")
             for member_name, obj in inspect.getmembers(module, inspect.isclass):
-                if issubclass(obj, Tool) and obj is not Tool:
+                if issubclass(obj, Tool) and obj is not Tool and not obj.internal:
                     tool_config = self.config.get(name, {})
                     self.tools[name] = obj(tool_config)
 
@@ -36,7 +36,7 @@ class ToolManager:
     def execute_action(self, tool_name, action_name, user_id=None, **kwargs):
         if tool_name not in self.tools:
             raise ValueError(f"Tool '{tool_name}' not loaded")
-        if tool_name in {"mcp_tool", "memory", "todo_list"} and user_id:
+        if tool_name in {"mcp_tool", "memory", "todo_list", "notes"} and user_id:
             tool_config = self.config.get(tool_name, {})
             tool = self.load_tool(tool_name, tool_config, user_id)
             return tool.execute_action(action_name, **kwargs)

application/agents/workflow_agent.py

@@ -0,0 +1,265 @@
+import logging
+from datetime import datetime, timezone
+from typing import Any, Dict, Generator, Optional
+
+from application.agents.base import BaseAgent
+from application.agents.workflows.schemas import (
+    ExecutionStatus,
+    Workflow,
+    WorkflowEdge,
+    WorkflowGraph,
+    WorkflowNode,
+    WorkflowRun,
+)
+from application.agents.workflows.workflow_engine import WorkflowEngine
+from application.core.mongo_db import MongoDB
+from application.core.settings import settings
+from application.logging import log_activity, LogContext
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.workflow_runs import WorkflowRunsRepository
+from application.storage.db.repositories.workflows import WorkflowsRepository
+
+logger = logging.getLogger(__name__)
+
+
+class WorkflowAgent(BaseAgent):
+    """A specialized agent that executes predefined workflows."""
+
+    def __init__(
+        self,
+        *args,
+        workflow_id: Optional[str] = None,
+        workflow: Optional[Dict[str, Any]] = None,
+        workflow_owner: Optional[str] = None,
+        **kwargs,
+    ):
+        super().__init__(*args, **kwargs)
+        self.workflow_id = workflow_id
+        self.workflow_owner = workflow_owner
+        self._workflow_data = workflow
+        self._engine: Optional[WorkflowEngine] = None
+
+    @log_activity()
+    def gen(
+        self, query: str, log_context: LogContext = None
+    ) -> Generator[Dict[str, str], None, None]:
+        yield from self._gen_inner(query, log_context)
+
+    def _gen_inner(
+        self, query: str, log_context: LogContext
+    ) -> Generator[Dict[str, str], None, None]:
+        graph = self._load_workflow_graph()
+        if not graph:
+            yield {"type": "error", "error": "Failed to load workflow configuration."}
+            return
+        self._engine = WorkflowEngine(graph, self)
+        yield from self._engine.execute({}, query)
+        self._save_workflow_run(query)
+
+    def _load_workflow_graph(self) -> Optional[WorkflowGraph]:
+        if self._workflow_data:
+            return self._parse_embedded_workflow()
+        if self.workflow_id:
+            return self._load_from_database()
+        return None
+
+    def _parse_embedded_workflow(self) -> Optional[WorkflowGraph]:
+        try:
+            nodes_data = self._workflow_data.get("nodes", [])
+            edges_data = self._workflow_data.get("edges", [])
+
+            workflow = Workflow(
+                name=self._workflow_data.get("name", "Embedded Workflow"),
+                description=self._workflow_data.get("description"),
+            )
+
+            nodes = []
+            for n in nodes_data:
+                node_config = n.get("data", {})
+                nodes.append(
+                    WorkflowNode(
+                        id=n["id"],
+                        workflow_id=self.workflow_id or "embedded",
+                        type=n["type"],
+                        title=n.get("title", "Node"),
+                        description=n.get("description"),
+                        position=n.get("position", {"x": 0, "y": 0}),
+                        config=node_config,
+                    )
+                )
+            edges = []
+            for e in edges_data:
+                edges.append(
+                    WorkflowEdge(
+                        id=e["id"],
+                        workflow_id=self.workflow_id or "embedded",
+                        source=e.get("source") or e.get("source_id"),
+                        target=e.get("target") or e.get("target_id"),
+                        sourceHandle=e.get("sourceHandle") or e.get("source_handle"),
+                        targetHandle=e.get("targetHandle") or e.get("target_handle"),
+                    )
+                )
+            return WorkflowGraph(workflow=workflow, nodes=nodes, edges=edges)
+        except Exception as e:
+            logger.error(f"Invalid embedded workflow: {e}")
+            return None
+
+    def _load_from_database(self) -> Optional[WorkflowGraph]:
+        try:
+            from bson.objectid import ObjectId
+
+            if not self.workflow_id or not ObjectId.is_valid(self.workflow_id):
+                logger.error(f"Invalid workflow ID: {self.workflow_id}")
+                return None
+            owner_id = self.workflow_owner
+            if not owner_id and isinstance(self.decoded_token, dict):
+                owner_id = self.decoded_token.get("sub")
+            if not owner_id:
+                logger.error(
+                    f"Workflow owner not available for workflow load: {self.workflow_id}"
+                )
+                return None
+
+            mongo = MongoDB.get_client()
+            db = mongo[settings.MONGO_DB_NAME]
+
+            workflows_coll = db["workflows"]
+            workflow_nodes_coll = db["workflow_nodes"]
+            workflow_edges_coll = db["workflow_edges"]
+
+            workflow_doc = workflows_coll.find_one(
+                {"_id": ObjectId(self.workflow_id), "user": owner_id}
+            )
+            if not workflow_doc:
+                logger.error(
+                    f"Workflow {self.workflow_id} not found or inaccessible for user {owner_id}"
+                )
+                return None
+            workflow = Workflow(**workflow_doc)
+            graph_version = workflow_doc.get("current_graph_version", 1)
+            try:
+                graph_version = int(graph_version)
+                if graph_version <= 0:
+                    graph_version = 1
+            except (ValueError, TypeError):
+                graph_version = 1
+
+            nodes_docs = list(
+                workflow_nodes_coll.find(
+                    {"workflow_id": self.workflow_id, "graph_version": graph_version}
+                )
+            )
+            if not nodes_docs and graph_version == 1:
+                nodes_docs = list(
+                    workflow_nodes_coll.find(
+                        {
+                            "workflow_id": self.workflow_id,
+                            "graph_version": {"$exists": False},
+                        }
+                    )
+                )
+            nodes = [WorkflowNode(**doc) for doc in nodes_docs]
+
+            edges_docs = list(
+                workflow_edges_coll.find(
+                    {"workflow_id": self.workflow_id, "graph_version": graph_version}
+                )
+            )
+            if not edges_docs and graph_version == 1:
+                edges_docs = list(
+                    workflow_edges_coll.find(
+                        {
+                            "workflow_id": self.workflow_id,
+                            "graph_version": {"$exists": False},
+                        }
+                    )
+                )
+            edges = [WorkflowEdge(**doc) for doc in edges_docs]
+
+            return WorkflowGraph(workflow=workflow, nodes=nodes, edges=edges)
+        except Exception as e:
+            logger.error(f"Failed to load workflow from database: {e}")
+            return None
+
+    def _save_workflow_run(self, query: str) -> None:
+        if not self._engine:
+            return
+        owner_id = self.workflow_owner
+        if not owner_id and isinstance(self.decoded_token, dict):
+            owner_id = self.decoded_token.get("sub")
+        try:
+            mongo = MongoDB.get_client()
+            db = mongo[settings.MONGO_DB_NAME]
+            workflow_runs_coll = db["workflow_runs"]
+
+            run = WorkflowRun(
+                workflow_id=self.workflow_id or "unknown",
+                user=owner_id,
+                status=self._determine_run_status(),
+                inputs={"query": query},
+                outputs=self._serialize_state(self._engine.state),
+                steps=self._engine.get_execution_summary(),
+                created_at=datetime.now(timezone.utc),
+                completed_at=datetime.now(timezone.utc),
+            )
+
+            result = workflow_runs_coll.insert_one(run.to_mongo_doc())
+            legacy_mongo_id = (
+                str(result.inserted_id)
+                if getattr(result, "inserted_id", None) is not None
+                else None
+            )
+
+            def _pg_write(repo: WorkflowRunsRepository) -> None:
+                if not self.workflow_id or not owner_id or not legacy_mongo_id:
+                    return
+                workflow = WorkflowsRepository(repo._conn).get_by_legacy_id(
+                    self.workflow_id, owner_id,
+                )
+                if workflow is None:
+                    return
+                repo.create(
+                    workflow["id"],
+                    owner_id,
+                    run.status.value,
+                    inputs=run.inputs,
+                    result=run.outputs,
+                    steps=[step.model_dump(mode="json") for step in run.steps],
+                    started_at=run.created_at,
+                    ended_at=run.completed_at,
+                    legacy_mongo_id=legacy_mongo_id,
+                )
+
+            dual_write(WorkflowRunsRepository, _pg_write)
+        except Exception as e:
+            logger.error(f"Failed to save workflow run: {e}")
+
+    def _determine_run_status(self) -> ExecutionStatus:
+        if not self._engine or not self._engine.execution_log:
+            return ExecutionStatus.COMPLETED
+        for log in self._engine.execution_log:
+            if log.get("status") == ExecutionStatus.FAILED.value:
+                return ExecutionStatus.FAILED
+        return ExecutionStatus.COMPLETED
+
+    def _serialize_state(self, state: Dict[str, Any]) -> Dict[str, Any]:
+        serialized: Dict[str, Any] = {}
+        for key, value in state.items():
+            serialized[key] = self._serialize_state_value(value)
+        return serialized
+
+    def _serialize_state_value(self, value: Any) -> Any:
+        if isinstance(value, dict):
+            return {
+                str(dict_key): self._serialize_state_value(dict_value)
+                for dict_key, dict_value in value.items()
+            }
+        if isinstance(value, list):
+            return [self._serialize_state_value(item) for item in value]
+        if isinstance(value, tuple):
+            return [self._serialize_state_value(item) for item in value]
+        if isinstance(value, datetime):
+            return value.isoformat()
+        if isinstance(value, (str, int, float, bool, type(None))):
+            return value
+        return str(value)

application/agents/workflows/cel_evaluator.py

@@ -0,0 +1,64 @@
+from typing import Any, Dict
+
+import celpy
+import celpy.celtypes
+
+
+class CelEvaluationError(Exception):
+    pass
+
+
+def _convert_value(value: Any) -> Any:
+    if isinstance(value, bool):
+        return celpy.celtypes.BoolType(value)
+    if isinstance(value, int):
+        return celpy.celtypes.IntType(value)
+    if isinstance(value, float):
+        return celpy.celtypes.DoubleType(value)
+    if isinstance(value, str):
+        return celpy.celtypes.StringType(value)
+    if isinstance(value, list):
+        return celpy.celtypes.ListType([_convert_value(item) for item in value])
+    if isinstance(value, dict):
+        return celpy.celtypes.MapType(
+            {celpy.celtypes.StringType(k): _convert_value(v) for k, v in value.items()}
+        )
+    if value is None:
+        return celpy.celtypes.BoolType(False)
+    return celpy.celtypes.StringType(str(value))
+
+
+def build_activation(state: Dict[str, Any]) -> Dict[str, Any]:
+    return {k: _convert_value(v) for k, v in state.items()}
+
+
+def evaluate_cel(expression: str, state: Dict[str, Any]) -> Any:
+    if not expression or not expression.strip():
+        raise CelEvaluationError("Empty expression")
+    try:
+        env = celpy.Environment()
+        ast = env.compile(expression)
+        program = env.program(ast)
+        activation = build_activation(state)
+        result = program.evaluate(activation)
+    except celpy.CELEvalError as exc:
+        raise CelEvaluationError(f"CEL evaluation error: {exc}") from exc
+    except Exception as exc:
+        raise CelEvaluationError(f"CEL error: {exc}") from exc
+    return cel_to_python(result)
+
+
+def cel_to_python(value: Any) -> Any:
+    if isinstance(value, celpy.celtypes.BoolType):
+        return bool(value)
+    if isinstance(value, celpy.celtypes.IntType):
+        return int(value)
+    if isinstance(value, celpy.celtypes.DoubleType):
+        return float(value)
+    if isinstance(value, celpy.celtypes.StringType):
+        return str(value)
+    if isinstance(value, celpy.celtypes.ListType):
+        return [cel_to_python(item) for item in value]
+    if isinstance(value, celpy.celtypes.MapType):
+        return {str(k): cel_to_python(v) for k, v in value.items()}
+    return value

application/agents/workflows/node_agent.py

@@ -0,0 +1,104 @@
+"""Workflow Node Agents - defines specialized agents for workflow nodes."""
+
+from typing import Any, Dict, List, Optional, Type
+
+from application.agents.agentic_agent import AgenticAgent
+from application.agents.base import BaseAgent
+from application.agents.classic_agent import ClassicAgent
+from application.agents.research_agent import ResearchAgent
+from application.agents.workflows.schemas import AgentType
+
+
+class ToolFilterMixin:
+    """Mixin that filters fetched tools to only those specified in tool_ids."""
+
+    _allowed_tool_ids: List[str]
+
+    def _get_user_tools(self, user: str = "local") -> Dict[str, Dict[str, Any]]:
+        all_tools = super()._get_user_tools(user)
+        if not self._allowed_tool_ids:
+            return {}
+        filtered_tools = {
+            tool_id: tool
+            for tool_id, tool in all_tools.items()
+            if str(tool.get("_id", "")) in self._allowed_tool_ids
+        }
+        return filtered_tools
+
+    def _get_tools(self, api_key: str = None) -> Dict[str, Dict[str, Any]]:
+        all_tools = super()._get_tools(api_key)
+        if not self._allowed_tool_ids:
+            return {}
+        filtered_tools = {
+            tool_id: tool
+            for tool_id, tool in all_tools.items()
+            if str(tool.get("_id", "")) in self._allowed_tool_ids
+        }
+        return filtered_tools
+
+
+class _WorkflowNodeMixin:
+    """Common __init__ for all workflow node agents."""
+
+    def __init__(
+        self,
+        endpoint: str,
+        llm_name: str,
+        model_id: str,
+        api_key: str,
+        tool_ids: Optional[List[str]] = None,
+        **kwargs,
+    ):
+        super().__init__(
+            endpoint=endpoint,
+            llm_name=llm_name,
+            model_id=model_id,
+            api_key=api_key,
+            **kwargs,
+        )
+        self._allowed_tool_ids = tool_ids or []
+
+
+class WorkflowNodeClassicAgent(ToolFilterMixin, _WorkflowNodeMixin, ClassicAgent):
+    pass
+
+
+class WorkflowNodeAgenticAgent(ToolFilterMixin, _WorkflowNodeMixin, AgenticAgent):
+    pass
+
+
+class WorkflowNodeResearchAgent(ToolFilterMixin, _WorkflowNodeMixin, ResearchAgent):
+    pass
+
+
+class WorkflowNodeAgentFactory:
+
+    _agents: Dict[AgentType, Type[BaseAgent]] = {
+        AgentType.CLASSIC: WorkflowNodeClassicAgent,
+        AgentType.REACT: WorkflowNodeClassicAgent,  # backwards compat
+        AgentType.AGENTIC: WorkflowNodeAgenticAgent,
+        AgentType.RESEARCH: WorkflowNodeResearchAgent,
+    }
+
+    @classmethod
+    def create(
+        cls,
+        agent_type: AgentType,
+        endpoint: str,
+        llm_name: str,
+        model_id: str,
+        api_key: str,
+        tool_ids: Optional[List[str]] = None,
+        **kwargs,
+    ) -> BaseAgent:
+        agent_class = cls._agents.get(agent_type)
+        if not agent_class:
+            raise ValueError(f"Unsupported agent type: {agent_type}")
+        return agent_class(
+            endpoint=endpoint,
+            llm_name=llm_name,
+            model_id=model_id,
+            api_key=api_key,
+            tool_ids=tool_ids,
+            **kwargs,
+        )

application/agents/workflows/schemas.py

@@ -0,0 +1,242 @@
+from datetime import datetime, timezone
+from enum import Enum
+from typing import Any, Dict, List, Literal, Optional, Union
+
+from bson import ObjectId
+from pydantic import BaseModel, ConfigDict, Field, field_validator
+
+
+class NodeType(str, Enum):
+    START = "start"
+    END = "end"
+    AGENT = "agent"
+    NOTE = "note"
+    STATE = "state"
+    CONDITION = "condition"
+
+
+class AgentType(str, Enum):
+    CLASSIC = "classic"
+    REACT = "react"
+    AGENTIC = "agentic"
+    RESEARCH = "research"
+
+
+class ExecutionStatus(str, Enum):
+    PENDING = "pending"
+    RUNNING = "running"
+    COMPLETED = "completed"
+    FAILED = "failed"
+
+
+class Position(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+    x: float = 0.0
+    y: float = 0.0
+
+
+class AgentNodeConfig(BaseModel):
+    model_config = ConfigDict(extra="allow")
+    agent_type: AgentType = AgentType.CLASSIC
+    llm_name: Optional[str] = None
+    system_prompt: str = "You are a helpful assistant."
+    prompt_template: str = ""
+    output_variable: Optional[str] = None
+    stream_to_user: bool = True
+    tools: List[str] = Field(default_factory=list)
+    sources: List[str] = Field(default_factory=list)
+    chunks: str = "2"
+    retriever: str = ""
+    model_id: Optional[str] = None
+    json_schema: Optional[Dict[str, Any]] = None
+
+
+class ConditionCase(BaseModel):
+    model_config = ConfigDict(extra="forbid", populate_by_name=True)
+    name: Optional[str] = None
+    expression: str = ""
+    source_handle: str = Field(..., alias="sourceHandle")
+
+
+class ConditionNodeConfig(BaseModel):
+    model_config = ConfigDict(extra="allow")
+    mode: Literal["simple", "advanced"] = "simple"
+    cases: List[ConditionCase] = Field(default_factory=list)
+
+
+class StateOperation(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+    expression: str = ""
+    target_variable: str = ""
+
+
+class WorkflowEdgeCreate(BaseModel):
+    model_config = ConfigDict(populate_by_name=True)
+    id: str
+    workflow_id: str
+    source_id: str = Field(..., alias="source")
+    target_id: str = Field(..., alias="target")
+    source_handle: Optional[str] = Field(None, alias="sourceHandle")
+    target_handle: Optional[str] = Field(None, alias="targetHandle")
+
+
+class WorkflowEdge(WorkflowEdgeCreate):
+    mongo_id: Optional[str] = Field(None, alias="_id")
+
+    @field_validator("mongo_id", mode="before")
+    @classmethod
+    def convert_objectid(cls, v: Any) -> Optional[str]:
+        if isinstance(v, ObjectId):
+            return str(v)
+        return v
+
+    def to_mongo_doc(self) -> Dict[str, Any]:
+        return {
+            "id": self.id,
+            "workflow_id": self.workflow_id,
+            "source_id": self.source_id,
+            "target_id": self.target_id,
+            "source_handle": self.source_handle,
+            "target_handle": self.target_handle,
+        }
+
+
+class WorkflowNodeCreate(BaseModel):
+    model_config = ConfigDict(extra="allow")
+    id: str
+    workflow_id: str
+    type: NodeType
+    title: str = "Node"
+    description: Optional[str] = None
+    position: Position = Field(default_factory=Position)
+    config: Dict[str, Any] = Field(default_factory=dict)
+
+    @field_validator("position", mode="before")
+    @classmethod
+    def parse_position(cls, v: Union[Dict[str, float], Position]) -> Position:
+        if isinstance(v, dict):
+            return Position(**v)
+        return v
+
+
+class WorkflowNode(WorkflowNodeCreate):
+    mongo_id: Optional[str] = Field(None, alias="_id")
+
+    @field_validator("mongo_id", mode="before")
+    @classmethod
+    def convert_objectid(cls, v: Any) -> Optional[str]:
+        if isinstance(v, ObjectId):
+            return str(v)
+        return v
+
+    def to_mongo_doc(self) -> Dict[str, Any]:
+        return {
+            "id": self.id,
+            "workflow_id": self.workflow_id,
+            "type": self.type.value,
+            "title": self.title,
+            "description": self.description,
+            "position": self.position.model_dump(),
+            "config": self.config,
+        }
+
+
+class WorkflowCreate(BaseModel):
+    model_config = ConfigDict(extra="allow")
+    name: str = "New Workflow"
+    description: Optional[str] = None
+    user: Optional[str] = None
+
+
+class Workflow(WorkflowCreate):
+    id: Optional[str] = Field(None, alias="_id")
+    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
+    updated_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
+
+    @field_validator("id", mode="before")
+    @classmethod
+    def convert_objectid(cls, v: Any) -> Optional[str]:
+        if isinstance(v, ObjectId):
+            return str(v)
+        return v
+
+    def to_mongo_doc(self) -> Dict[str, Any]:
+        return {
+            "name": self.name,
+            "description": self.description,
+            "user": self.user,
+            "created_at": self.created_at,
+            "updated_at": self.updated_at,
+        }
+
+
+class WorkflowGraph(BaseModel):
+    workflow: Workflow
+    nodes: List[WorkflowNode] = Field(default_factory=list)
+    edges: List[WorkflowEdge] = Field(default_factory=list)
+
+    def get_node_by_id(self, node_id: str) -> Optional[WorkflowNode]:
+        for node in self.nodes:
+            if node.id == node_id:
+                return node
+        return None
+
+    def get_start_node(self) -> Optional[WorkflowNode]:
+        for node in self.nodes:
+            if node.type == NodeType.START:
+                return node
+        return None
+
+    def get_outgoing_edges(self, node_id: str) -> List[WorkflowEdge]:
+        return [edge for edge in self.edges if edge.source_id == node_id]
+
+
+class NodeExecutionLog(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+    node_id: str
+    node_type: str
+    status: ExecutionStatus
+    started_at: datetime
+    completed_at: Optional[datetime] = None
+    error: Optional[str] = None
+    state_snapshot: Dict[str, Any] = Field(default_factory=dict)
+
+
+class WorkflowRunCreate(BaseModel):
+    workflow_id: str
+    inputs: Dict[str, str] = Field(default_factory=dict)
+
+
+class WorkflowRun(BaseModel):
+    model_config = ConfigDict(extra="allow")
+    id: Optional[str] = Field(None, alias="_id")
+    workflow_id: str
+    user: Optional[str] = None
+    status: ExecutionStatus = ExecutionStatus.PENDING
+    inputs: Dict[str, str] = Field(default_factory=dict)
+    outputs: Dict[str, Any] = Field(default_factory=dict)
+    steps: List[NodeExecutionLog] = Field(default_factory=list)
+    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
+    completed_at: Optional[datetime] = None
+
+    @field_validator("id", mode="before")
+    @classmethod
+    def convert_objectid(cls, v: Any) -> Optional[str]:
+        if isinstance(v, ObjectId):
+            return str(v)
+        return v
+
+    def to_mongo_doc(self) -> Dict[str, Any]:
+        doc = {
+            "workflow_id": self.workflow_id,
+            "status": self.status.value,
+            "inputs": self.inputs,
+            "outputs": self.outputs,
+            "steps": [step.model_dump() for step in self.steps],
+            "created_at": self.created_at,
+            "completed_at": self.completed_at,
+        }
+        if self.user:
+            doc["user"] = self.user
+            doc["user_id"] = self.user
+        return doc

application/agents/workflows/workflow_engine.py

@@ -0,0 +1,470 @@
+import json
+import logging
+from datetime import datetime, timezone
+from typing import Any, Dict, Generator, List, Optional, TYPE_CHECKING
+
+from application.agents.workflows.cel_evaluator import CelEvaluationError, evaluate_cel
+from application.agents.workflows.node_agent import WorkflowNodeAgentFactory
+from application.agents.workflows.schemas import (
+    AgentNodeConfig,
+    AgentType,
+    ConditionNodeConfig,
+    ExecutionStatus,
+    NodeExecutionLog,
+    NodeType,
+    WorkflowGraph,
+    WorkflowNode,
+)
+from application.core.json_schema_utils import (
+    JsonSchemaValidationError,
+    normalize_json_schema_payload,
+)
+from application.error import sanitize_api_error
+from application.templates.namespaces import NamespaceManager
+from application.templates.template_engine import TemplateEngine, TemplateRenderError
+
+try:
+    import jsonschema
+except ImportError:  # pragma: no cover - optional dependency in some deployments.
+    jsonschema = None
+
+if TYPE_CHECKING:
+    from application.agents.base import BaseAgent
+logger = logging.getLogger(__name__)
+
+StateValue = Any
+WorkflowState = Dict[str, StateValue]
+TEMPLATE_RESERVED_NAMESPACES = {"agent", "system", "source", "tools", "passthrough"}
+
+
+class WorkflowEngine:
+    MAX_EXECUTION_STEPS = 50
+
+    def __init__(self, graph: WorkflowGraph, agent: "BaseAgent"):
+        self.graph = graph
+        self.agent = agent
+        self.state: WorkflowState = {}
+        self.execution_log: List[Dict[str, Any]] = []
+        self._condition_result: Optional[str] = None
+        self._template_engine = TemplateEngine()
+        self._namespace_manager = NamespaceManager()
+
+    def execute(
+        self, initial_inputs: WorkflowState, query: str
+    ) -> Generator[Dict[str, str], None, None]:
+        self._initialize_state(initial_inputs, query)
+
+        start_node = self.graph.get_start_node()
+        if not start_node:
+            yield {"type": "error", "error": "No start node found in workflow."}
+            return
+        current_node_id: Optional[str] = start_node.id
+        steps = 0
+
+        while current_node_id and steps < self.MAX_EXECUTION_STEPS:
+            node = self.graph.get_node_by_id(current_node_id)
+            if not node:
+                yield {"type": "error", "error": f"Node {current_node_id} not found."}
+                break
+            log_entry = self._create_log_entry(node)
+
+            yield {
+                "type": "workflow_step",
+                "node_id": node.id,
+                "node_type": node.type.value,
+                "node_title": node.title,
+                "status": "running",
+            }
+
+            try:
+                yield from self._execute_node(node)
+                log_entry["status"] = ExecutionStatus.COMPLETED.value
+                log_entry["completed_at"] = datetime.now(timezone.utc)
+
+                output_key = f"node_{node.id}_output"
+                node_output = self.state.get(output_key)
+
+                yield {
+                    "type": "workflow_step",
+                    "node_id": node.id,
+                    "node_type": node.type.value,
+                    "node_title": node.title,
+                    "status": "completed",
+                    "state_snapshot": dict(self.state),
+                    "output": node_output,
+                }
+            except Exception as e:
+                logger.error(f"Error executing node {node.id}: {e}", exc_info=True)
+                log_entry["status"] = ExecutionStatus.FAILED.value
+                log_entry["error"] = str(e)
+                log_entry["completed_at"] = datetime.now(timezone.utc)
+                log_entry["state_snapshot"] = dict(self.state)
+                self.execution_log.append(log_entry)
+
+                user_friendly_error = sanitize_api_error(e)
+                yield {
+                    "type": "workflow_step",
+                    "node_id": node.id,
+                    "node_type": node.type.value,
+                    "node_title": node.title,
+                    "status": "failed",
+                    "state_snapshot": dict(self.state),
+                    "error": user_friendly_error,
+                }
+                yield {"type": "error", "error": user_friendly_error}
+                break
+            log_entry["state_snapshot"] = dict(self.state)
+            self.execution_log.append(log_entry)
+
+            if node.type == NodeType.END:
+                break
+            current_node_id = self._get_next_node_id(current_node_id)
+            if current_node_id is None and node.type != NodeType.END:
+                logger.warning(
+                    f"Branch ended at node '{node.title}' ({node.id}) without reaching an end node"
+                )
+            steps += 1
+        if steps >= self.MAX_EXECUTION_STEPS:
+            logger.warning(
+                f"Workflow reached max steps limit ({self.MAX_EXECUTION_STEPS})"
+            )
+
+    def _initialize_state(self, initial_inputs: WorkflowState, query: str) -> None:
+        self.state.update(initial_inputs)
+        self.state["query"] = query
+        self.state["chat_history"] = str(self.agent.chat_history)
+
+    def _create_log_entry(self, node: WorkflowNode) -> Dict[str, Any]:
+        return {
+            "node_id": node.id,
+            "node_type": node.type.value,
+            "started_at": datetime.now(timezone.utc),
+            "completed_at": None,
+            "status": ExecutionStatus.RUNNING.value,
+            "error": None,
+            "state_snapshot": {},
+        }
+
+    def _get_next_node_id(self, current_node_id: str) -> Optional[str]:
+        node = self.graph.get_node_by_id(current_node_id)
+        edges = self.graph.get_outgoing_edges(current_node_id)
+        if not edges:
+            return None
+
+        if node and node.type == NodeType.CONDITION and self._condition_result:
+            target_handle = self._condition_result
+            self._condition_result = None
+            for edge in edges:
+                if edge.source_handle == target_handle:
+                    return edge.target_id
+            return None
+
+        return edges[0].target_id
+
+    def _execute_node(
+        self, node: WorkflowNode
+    ) -> Generator[Dict[str, str], None, None]:
+        logger.info(f"Executing node {node.id} ({node.type.value})")
+
+        node_handlers = {
+            NodeType.START: self._execute_start_node,
+            NodeType.NOTE: self._execute_note_node,
+            NodeType.AGENT: self._execute_agent_node,
+            NodeType.STATE: self._execute_state_node,
+            NodeType.CONDITION: self._execute_condition_node,
+            NodeType.END: self._execute_end_node,
+        }
+
+        handler = node_handlers.get(node.type)
+        if handler:
+            yield from handler(node)
+
+    def _execute_start_node(
+        self, node: WorkflowNode
+    ) -> Generator[Dict[str, str], None, None]:
+        yield from ()
+
+    def _execute_note_node(
+        self, node: WorkflowNode
+    ) -> Generator[Dict[str, str], None, None]:
+        yield from ()
+
+    def _execute_agent_node(
+        self, node: WorkflowNode
+    ) -> Generator[Dict[str, str], None, None]:
+        from application.core.model_utils import (
+            get_api_key_for_provider,
+            get_model_capabilities,
+            get_provider_from_model_id,
+        )
+
+        node_config = AgentNodeConfig(**node.config.get("config", node.config))
+
+        if node_config.prompt_template:
+            formatted_prompt = self._format_template(node_config.prompt_template)
+        else:
+            formatted_prompt = self.state.get("query", "")
+        node_json_schema = self._normalize_node_json_schema(
+            node_config.json_schema, node.title
+        )
+        node_model_id = node_config.model_id or self.agent.model_id
+        node_llm_name = (
+            node_config.llm_name
+            or get_provider_from_model_id(node_model_id or "")
+            or self.agent.llm_name
+        )
+        node_api_key = get_api_key_for_provider(node_llm_name) or self.agent.api_key
+
+        if node_json_schema and node_model_id:
+            model_capabilities = get_model_capabilities(node_model_id)
+            if model_capabilities and not model_capabilities.get(
+                "supports_structured_output", False
+            ):
+                raise ValueError(
+                    f'Model "{node_model_id}" does not support structured output for node "{node.title}"'
+                )
+
+        factory_kwargs = {
+            "agent_type": node_config.agent_type,
+            "endpoint": self.agent.endpoint,
+            "llm_name": node_llm_name,
+            "model_id": node_model_id,
+            "api_key": node_api_key,
+            "tool_ids": node_config.tools,
+            "prompt": node_config.system_prompt,
+            "chat_history": self.agent.chat_history,
+            "decoded_token": self.agent.decoded_token,
+            "json_schema": node_json_schema,
+        }
+
+        # Agentic/research agents need retriever_config for on-demand search
+        if node_config.agent_type in (AgentType.AGENTIC, AgentType.RESEARCH):
+            factory_kwargs["retriever_config"] = {
+                "source": {"active_docs": node_config.sources} if node_config.sources else {},
+                "retriever_name": node_config.retriever or "classic",
+                "chunks": int(node_config.chunks) if node_config.chunks else 2,
+                "model_id": node_model_id,
+                "llm_name": node_llm_name,
+                "api_key": node_api_key,
+                "decoded_token": self.agent.decoded_token,
+            }
+
+        node_agent = WorkflowNodeAgentFactory.create(**factory_kwargs)
+
+        full_response_parts: List[str] = []
+        structured_response_parts: List[str] = []
+        has_structured_response = False
+        first_chunk = True
+        for event in node_agent.gen(formatted_prompt):
+            if "answer" in event:
+                chunk = str(event["answer"])
+                full_response_parts.append(chunk)
+                if event.get("structured"):
+                    has_structured_response = True
+                    structured_response_parts.append(chunk)
+                if node_config.stream_to_user:
+                    if first_chunk and hasattr(self, "_has_streamed"):
+                        yield {"answer": "\n\n"}
+                        first_chunk = False
+                    yield event
+
+        if node_config.stream_to_user:
+            self._has_streamed = True
+
+        full_response = "".join(full_response_parts).strip()
+        output_value: Any = full_response
+        if has_structured_response:
+            structured_response = "".join(structured_response_parts).strip()
+            response_to_parse = structured_response or full_response
+            parsed_success, parsed_structured = self._parse_structured_output(
+                response_to_parse
+            )
+            output_value = parsed_structured if parsed_success else response_to_parse
+            if node_json_schema:
+                self._validate_structured_output(node_json_schema, output_value)
+        elif node_json_schema:
+            parsed_success, parsed_structured = self._parse_structured_output(
+                full_response
+            )
+            if not parsed_success:
+                raise ValueError(
+                    "Structured output was expected but response was not valid JSON"
+                )
+            output_value = parsed_structured
+            self._validate_structured_output(node_json_schema, output_value)
+
+        default_output_key = f"node_{node.id}_output"
+        self.state[default_output_key] = output_value
+
+        if node_config.output_variable:
+            self.state[node_config.output_variable] = output_value
+
+    def _execute_state_node(
+        self, node: WorkflowNode
+    ) -> Generator[Dict[str, str], None, None]:
+        config = node.config.get("config", node.config)
+        for op in config.get("operations", []):
+            expression = op.get("expression", "")
+            target_variable = op.get("target_variable", "")
+            if expression and target_variable:
+                self.state[target_variable] = evaluate_cel(expression, self.state)
+        yield from ()
+
+    def _execute_condition_node(
+        self, node: WorkflowNode
+    ) -> Generator[Dict[str, str], None, None]:
+        config = ConditionNodeConfig(**node.config.get("config", node.config))
+        matched_handle = None
+
+        for case in config.cases:
+            if not case.expression.strip():
+                continue
+            try:
+                if evaluate_cel(case.expression, self.state):
+                    matched_handle = case.source_handle
+                    break
+            except CelEvaluationError:
+                continue
+
+        self._condition_result = matched_handle or "else"
+        yield from ()
+
+    def _execute_end_node(
+        self, node: WorkflowNode
+    ) -> Generator[Dict[str, str], None, None]:
+        config = node.config.get("config", node.config)
+        output_template = str(config.get("output_template", ""))
+        if output_template:
+            formatted_output = self._format_template(output_template)
+            yield {"answer": formatted_output}
+
+    def _parse_structured_output(self, raw_response: str) -> tuple[bool, Optional[Any]]:
+        normalized_response = raw_response.strip()
+        if not normalized_response:
+            return False, None
+
+        try:
+            return True, json.loads(normalized_response)
+        except json.JSONDecodeError:
+            logger.warning(
+                "Workflow agent returned structured output that was not valid JSON"
+            )
+            return False, None
+
+    def _normalize_node_json_schema(
+        self, schema: Optional[Dict[str, Any]], node_title: str
+    ) -> Optional[Dict[str, Any]]:
+        if schema is None:
+            return None
+        try:
+            return normalize_json_schema_payload(schema)
+        except JsonSchemaValidationError as exc:
+            raise ValueError(
+                f'Invalid JSON schema for node "{node_title}": {exc}'
+            ) from exc
+
+    def _validate_structured_output(self, schema: Dict[str, Any], output_value: Any) -> None:
+        if jsonschema is None:
+            logger.warning(
+                "jsonschema package is not available, skipping structured output validation"
+            )
+            return
+
+        try:
+            normalized_schema = normalize_json_schema_payload(schema)
+        except JsonSchemaValidationError as exc:
+            raise ValueError(f"Invalid JSON schema: {exc}") from exc
+
+        try:
+            jsonschema.validate(instance=output_value, schema=normalized_schema)
+        except jsonschema.exceptions.ValidationError as exc:
+            raise ValueError(f"Structured output did not match schema: {exc.message}") from exc
+        except jsonschema.exceptions.SchemaError as exc:
+            raise ValueError(f"Invalid JSON schema: {exc.message}") from exc
+
+    def _format_template(self, template: str) -> str:
+        context = self._build_template_context()
+        try:
+            return self._template_engine.render(template, context)
+        except TemplateRenderError as e:
+            logger.warning(
+                "Workflow template rendering failed, using raw template: %s", str(e)
+            )
+            return template
+
+    def _build_template_context(self) -> Dict[str, Any]:
+        docs, docs_together = self._get_source_template_data()
+        passthrough_data = (
+            self.state.get("passthrough")
+            if isinstance(self.state.get("passthrough"), dict)
+            else None
+        )
+        tools_data = (
+            self.state.get("tools") if isinstance(self.state.get("tools"), dict) else None
+        )
+
+        context = self._namespace_manager.build_context(
+            user_id=getattr(self.agent, "user", None),
+            request_id=getattr(self.agent, "request_id", None),
+            passthrough_data=passthrough_data,
+            docs=docs,
+            docs_together=docs_together,
+            tools_data=tools_data,
+        )
+
+        agent_context: Dict[str, Any] = {}
+        for key, value in self.state.items():
+            if not isinstance(key, str):
+                continue
+            normalized_key = key.strip()
+            if not normalized_key:
+                continue
+            agent_context[normalized_key] = value
+
+        context["agent"] = agent_context
+
+        # Keep legacy top-level variables working while namespaced variables are adopted.
+        for key, value in agent_context.items():
+            if key in TEMPLATE_RESERVED_NAMESPACES:
+                context[f"agent_{key}"] = value
+                continue
+            if key not in context:
+                context[key] = value
+
+        return context
+
+    def _get_source_template_data(self) -> tuple[Optional[List[Dict[str, Any]]], Optional[str]]:
+        docs = getattr(self.agent, "retrieved_docs", None)
+        if not isinstance(docs, list) or len(docs) == 0:
+            return None, None
+
+        docs_together_parts: List[str] = []
+        for doc in docs:
+            if not isinstance(doc, dict):
+                continue
+            text = doc.get("text")
+            if not isinstance(text, str):
+                continue
+
+            filename = doc.get("filename") or doc.get("title") or doc.get("source")
+            if isinstance(filename, str) and filename.strip():
+                docs_together_parts.append(f"{filename}\n{text}")
+            else:
+                docs_together_parts.append(text)
+
+        docs_together = "\n\n".join(docs_together_parts) if docs_together_parts else None
+        return docs, docs_together
+
+    def get_execution_summary(self) -> List[NodeExecutionLog]:
+        return [
+            NodeExecutionLog(
+                node_id=log["node_id"],
+                node_type=log["node_type"],
+                status=ExecutionStatus(log["status"]),
+                started_at=log["started_at"],
+                completed_at=log.get("completed_at"),
+                error=log.get("error"),
+                state_snapshot=log.get("state_snapshot", {}),
+            )
+            for log in self.execution_log
+        ]

application/alembic.ini

@@ -0,0 +1,52 @@
+# Alembic configuration for the DocsGPT user-data Postgres database.
+#
+# The SQLAlchemy URL is deliberately NOT set here — env.py reads it from
+# ``application.core.settings.settings.POSTGRES_URI`` so the same config
+# source serves the running app and migrations. To run from the project
+# root::
+#
+#     alembic -c application/alembic.ini upgrade head
+
+[alembic]
+script_location = %(here)s/alembic
+prepend_sys_path = ..
+version_path_separator = os
+
+# sqlalchemy.url is intentionally left blank — env.py supplies it.
+sqlalchemy.url =
+
+[post_write_hooks]
+
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARNING
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARNING
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

application/alembic/env.py

@@ -0,0 +1,82 @@
+"""Alembic environment for the DocsGPT user-data Postgres database.
+
+The URL is pulled from ``application.core.settings`` rather than
+``alembic.ini`` so that a single ``POSTGRES_URI`` env var drives both the
+running app and ``alembic`` CLI invocations.
+"""
+
+import sys
+from logging.config import fileConfig
+from pathlib import Path
+
+# Make the project root importable regardless of cwd. env.py lives at
+# <repo>/application/alembic/env.py, so parents[2] is the repo root.
+_PROJECT_ROOT = Path(__file__).resolve().parents[2]
+if str(_PROJECT_ROOT) not in sys.path:
+    sys.path.insert(0, str(_PROJECT_ROOT))
+
+from alembic import context  # noqa: E402
+from sqlalchemy import engine_from_config, pool  # noqa: E402
+
+from application.core.settings import settings  # noqa: E402
+from application.storage.db.models import metadata as target_metadata  # noqa: E402
+
+config = context.config
+
+# Populate the runtime URL from settings.
+if settings.POSTGRES_URI:
+    config.set_main_option("sqlalchemy.url", settings.POSTGRES_URI)
+
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode (emits SQL without a live DB)."""
+    url = config.get_main_option("sqlalchemy.url")
+    if not url:
+        raise RuntimeError(
+            "POSTGRES_URI is not configured. Set it in your .env to a "
+            "psycopg3 URI such as "
+            "'postgresql+psycopg://user:pass@host:5432/docsgpt'."
+        )
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+        compare_type=True,
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode against a live connection."""
+    if not config.get_main_option("sqlalchemy.url"):
+        raise RuntimeError(
+            "POSTGRES_URI is not configured. Set it in your .env to a "
+            "psycopg3 URI such as "
+            "'postgresql+psycopg://user:pass@host:5432/docsgpt'."
+        )
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+        future=True,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            compare_type=True,
+        )
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

application/alembic/script.py.mako

@@ -0,0 +1,26 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

application/alembic/versions/0001_initial.py

@@ -0,0 +1,825 @@
+"""0001 initial schema — consolidated Phase-1..3 baseline.
+
+Revision ID: 0001_initial
+Revises:
+Create Date: 2026-04-13
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+
+
+revision: str = "0001_initial"
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ------------------------------------------------------------------
+    # Extensions
+    # ------------------------------------------------------------------
+    op.execute('CREATE EXTENSION IF NOT EXISTS "pgcrypto";')
+    op.execute('CREATE EXTENSION IF NOT EXISTS "citext";')
+
+    # ------------------------------------------------------------------
+    # Trigger functions
+    # ------------------------------------------------------------------
+    op.execute(
+        """
+        CREATE FUNCTION set_updated_at() RETURNS trigger
+        LANGUAGE plpgsql AS $$
+        BEGIN
+            NEW.updated_at = now();
+            RETURN NEW;
+        END;
+        $$;
+        """
+    )
+
+    op.execute(
+        """
+        CREATE FUNCTION ensure_user_exists() RETURNS trigger
+        LANGUAGE plpgsql AS $$
+        BEGIN
+            IF NEW.user_id IS NOT NULL THEN
+                INSERT INTO users (user_id) VALUES (NEW.user_id)
+                ON CONFLICT (user_id) DO NOTHING;
+            END IF;
+            RETURN NEW;
+        END;
+        $$;
+        """
+    )
+
+    op.execute(
+        """
+        CREATE FUNCTION cleanup_message_attachment_refs() RETURNS trigger
+        LANGUAGE plpgsql AS $$
+        BEGIN
+            UPDATE conversation_messages
+            SET attachments = array_remove(attachments, OLD.id)
+            WHERE OLD.id = ANY(attachments);
+            RETURN OLD;
+        END;
+        $$;
+        """
+    )
+
+    op.execute(
+        """
+        CREATE FUNCTION cleanup_agent_extra_source_refs() RETURNS trigger
+        LANGUAGE plpgsql AS $$
+        BEGIN
+            UPDATE agents
+            SET extra_source_ids = array_remove(extra_source_ids, OLD.id)
+            WHERE OLD.id = ANY(extra_source_ids);
+            RETURN OLD;
+        END;
+        $$;
+        """
+    )
+
+    op.execute(
+        """
+        CREATE FUNCTION cleanup_user_agent_prefs() RETURNS trigger
+        LANGUAGE plpgsql AS $$
+        DECLARE
+            agent_id_text text := OLD.id::text;
+        BEGIN
+            UPDATE users
+            SET agent_preferences = jsonb_set(
+                jsonb_set(
+                    agent_preferences,
+                    '{pinned}',
+                    COALESCE((
+                        SELECT jsonb_agg(e)
+                        FROM jsonb_array_elements(
+                            COALESCE(agent_preferences->'pinned', '[]'::jsonb)
+                        ) e
+                        WHERE (e #>> '{}') <> agent_id_text
+                    ), '[]'::jsonb)
+                ),
+                '{shared_with_me}',
+                COALESCE((
+                    SELECT jsonb_agg(e)
+                    FROM jsonb_array_elements(
+                        COALESCE(agent_preferences->'shared_with_me', '[]'::jsonb)
+                    ) e
+                    WHERE (e #>> '{}') <> agent_id_text
+                ), '[]'::jsonb)
+            )
+            WHERE agent_preferences->'pinned' @> to_jsonb(agent_id_text)
+               OR agent_preferences->'shared_with_me' @> to_jsonb(agent_id_text);
+            RETURN OLD;
+        END;
+        $$;
+        """
+    )
+
+    op.execute(
+        """
+        CREATE FUNCTION conversation_messages_fill_user_id() RETURNS trigger
+        LANGUAGE plpgsql AS $$
+        BEGIN
+            IF NEW.user_id IS NULL THEN
+                SELECT user_id INTO NEW.user_id
+                FROM conversations
+                WHERE id = NEW.conversation_id;
+            END IF;
+            RETURN NEW;
+        END;
+        $$;
+        """
+    )
+
+    # ------------------------------------------------------------------
+    # Tables
+    # ------------------------------------------------------------------
+    op.execute(
+        """
+        CREATE TABLE users (
+            id                UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id           TEXT NOT NULL UNIQUE,
+            agent_preferences JSONB NOT NULL
+                              DEFAULT '{"pinned": [], "shared_with_me": []}'::jsonb,
+            created_at        TIMESTAMPTZ NOT NULL DEFAULT now(),
+            updated_at        TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE prompts (
+            id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id         TEXT NOT NULL,
+            name            TEXT NOT NULL,
+            content         TEXT NOT NULL,
+            created_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
+            updated_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
+            legacy_mongo_id TEXT
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE user_tools (
+            id           UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id      TEXT NOT NULL,
+            name         TEXT NOT NULL,
+            custom_name  TEXT,
+            display_name TEXT,
+            config       JSONB NOT NULL DEFAULT '{}'::jsonb,
+            created_at   TIMESTAMPTZ NOT NULL DEFAULT now(),
+            updated_at   TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE token_usage (
+            id               BIGSERIAL PRIMARY KEY,
+            user_id          TEXT,
+            api_key          TEXT,
+            agent_id         UUID,
+            prompt_tokens    INTEGER NOT NULL DEFAULT 0,
+            generated_tokens INTEGER NOT NULL DEFAULT 0,
+            timestamp        TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+    op.execute(
+        "ALTER TABLE token_usage ADD CONSTRAINT token_usage_attribution_chk "
+        "CHECK (user_id IS NOT NULL OR api_key IS NOT NULL) NOT VALID;"
+    )
+
+    op.execute(
+        """
+        CREATE TABLE user_logs (
+            id        BIGSERIAL PRIMARY KEY,
+            user_id   TEXT,
+            endpoint  TEXT,
+            timestamp TIMESTAMPTZ NOT NULL DEFAULT now(),
+            data      JSONB
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE stack_logs (
+            id          BIGSERIAL PRIMARY KEY,
+            activity_id TEXT NOT NULL,
+            endpoint    TEXT,
+            level       TEXT,
+            user_id     TEXT,
+            api_key     TEXT,
+            query       TEXT,
+            stacks      JSONB NOT NULL DEFAULT '[]'::jsonb,
+            timestamp   TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE agent_folders (
+            id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id     TEXT NOT NULL,
+            name        TEXT NOT NULL,
+            description TEXT,
+            created_at  TIMESTAMPTZ NOT NULL DEFAULT now(),
+            updated_at  TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE sources (
+            id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id    TEXT NOT NULL,
+            name       TEXT NOT NULL,
+            type       TEXT,
+            metadata   JSONB NOT NULL DEFAULT '{}'::jsonb,
+            created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+            updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE agents (
+            id                     UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id                TEXT NOT NULL,
+            name                   TEXT NOT NULL,
+            description            TEXT,
+            agent_type             TEXT,
+            status                 TEXT NOT NULL,
+            key                    CITEXT UNIQUE,
+            source_id              UUID REFERENCES sources(id) ON DELETE SET NULL,
+            extra_source_ids       UUID[] NOT NULL DEFAULT '{}',
+            chunks                 INTEGER,
+            retriever              TEXT,
+            prompt_id              UUID REFERENCES prompts(id) ON DELETE SET NULL,
+            tools                  JSONB NOT NULL DEFAULT '[]'::jsonb,
+            json_schema            JSONB,
+            models                 JSONB,
+            default_model_id       TEXT,
+            folder_id              UUID REFERENCES agent_folders(id) ON DELETE SET NULL,
+            limited_token_mode     BOOLEAN NOT NULL DEFAULT false,
+            token_limit            INTEGER,
+            limited_request_mode   BOOLEAN NOT NULL DEFAULT false,
+            request_limit          INTEGER,
+            shared                 BOOLEAN NOT NULL DEFAULT false,
+            incoming_webhook_token CITEXT UNIQUE,
+            created_at             TIMESTAMPTZ NOT NULL DEFAULT now(),
+            updated_at             TIMESTAMPTZ NOT NULL DEFAULT now(),
+            last_used_at           TIMESTAMPTZ,
+            legacy_mongo_id        TEXT
+        );
+        """
+    )
+    op.execute(
+        "ALTER TABLE token_usage ADD CONSTRAINT token_usage_agent_fk "
+        "FOREIGN KEY (agent_id) REFERENCES agents(id) ON DELETE SET NULL;"
+    )
+
+    op.execute(
+        """
+        CREATE TABLE attachments (
+            id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id         TEXT NOT NULL,
+            filename        TEXT NOT NULL,
+            upload_path     TEXT NOT NULL,
+            mime_type       TEXT,
+            size            BIGINT,
+            created_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
+            legacy_mongo_id TEXT
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE memories (
+            id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id    TEXT NOT NULL,
+            tool_id    UUID REFERENCES user_tools(id) ON DELETE CASCADE,
+            path       TEXT NOT NULL,
+            content    TEXT NOT NULL,
+            updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE todos (
+            id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id    TEXT NOT NULL,
+            tool_id    UUID REFERENCES user_tools(id) ON DELETE CASCADE,
+            title      TEXT NOT NULL,
+            completed  BOOLEAN NOT NULL DEFAULT false,
+            created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+            updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE notes (
+            id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id    TEXT NOT NULL,
+            tool_id    UUID REFERENCES user_tools(id) ON DELETE CASCADE,
+            title      TEXT NOT NULL,
+            content    TEXT NOT NULL,
+            created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+            updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE connector_sessions (
+            id           UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id      TEXT NOT NULL,
+            provider     TEXT NOT NULL,
+            session_data JSONB NOT NULL,
+            expires_at   TIMESTAMPTZ,
+            created_at   TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE conversations (
+            id                   UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id              TEXT NOT NULL,
+            agent_id             UUID REFERENCES agents(id) ON DELETE SET NULL,
+            name                 TEXT,
+            api_key              TEXT,
+            is_shared_usage      BOOLEAN NOT NULL DEFAULT false,
+            shared_token         TEXT,
+            date                 TIMESTAMPTZ NOT NULL DEFAULT now(),
+            created_at           TIMESTAMPTZ NOT NULL DEFAULT now(),
+            updated_at           TIMESTAMPTZ NOT NULL DEFAULT now(),
+            shared_with          TEXT[] NOT NULL DEFAULT '{}'::text[],
+            compression_metadata JSONB,
+            legacy_mongo_id      TEXT,
+            CONSTRAINT conversations_api_key_nonempty_chk
+                CHECK (api_key IS NULL OR api_key <> '')
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE conversation_messages (
+            id               UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            conversation_id  UUID NOT NULL REFERENCES conversations(id) ON DELETE CASCADE,
+            position         INTEGER NOT NULL,
+            prompt           TEXT,
+            response         TEXT,
+            thought          TEXT,
+            sources          JSONB NOT NULL DEFAULT '[]'::jsonb,
+            tool_calls       JSONB NOT NULL DEFAULT '[]'::jsonb,
+            attachments      UUID[] NOT NULL DEFAULT '{}'::uuid[],
+            model_id         TEXT,
+            message_metadata JSONB NOT NULL DEFAULT '{}'::jsonb,
+            feedback         JSONB,
+            timestamp        TIMESTAMPTZ NOT NULL DEFAULT now(),
+            user_id          TEXT NOT NULL,
+            updated_at       TIMESTAMPTZ NOT NULL DEFAULT now()
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE shared_conversations (
+            id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            conversation_id UUID NOT NULL REFERENCES conversations(id) ON DELETE CASCADE,
+            user_id         TEXT NOT NULL,
+            is_promptable   BOOLEAN NOT NULL DEFAULT false,
+            created_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
+            uuid            UUID NOT NULL,
+            first_n_queries INTEGER NOT NULL DEFAULT 0,
+            api_key         TEXT,
+            prompt_id       UUID REFERENCES prompts(id) ON DELETE SET NULL,
+            chunks          INTEGER,
+            CONSTRAINT shared_conversations_api_key_nonempty_chk
+                CHECK (api_key IS NULL OR api_key <> '')
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE pending_tool_state (
+            id                 UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            conversation_id    UUID NOT NULL REFERENCES conversations(id) ON DELETE CASCADE,
+            user_id            TEXT NOT NULL,
+            messages           JSONB NOT NULL,
+            pending_tool_calls JSONB NOT NULL,
+            tools_dict         JSONB NOT NULL,
+            tool_schemas       JSONB NOT NULL,
+            agent_config       JSONB NOT NULL,
+            client_tools       JSONB,
+            created_at         TIMESTAMPTZ NOT NULL DEFAULT now(),
+            expires_at         TIMESTAMPTZ NOT NULL
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE workflows (
+            id                    UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            user_id               TEXT NOT NULL,
+            name                  TEXT NOT NULL,
+            description           TEXT,
+            created_at            TIMESTAMPTZ NOT NULL DEFAULT now(),
+            updated_at            TIMESTAMPTZ NOT NULL DEFAULT now(),
+            current_graph_version INTEGER NOT NULL DEFAULT 1,
+            legacy_mongo_id       TEXT
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE workflow_nodes (
+            id              UUID DEFAULT gen_random_uuid() NOT NULL,
+            workflow_id     UUID NOT NULL REFERENCES workflows(id) ON DELETE CASCADE,
+            graph_version   INTEGER NOT NULL,
+            node_type       TEXT NOT NULL,
+            config          JSONB NOT NULL DEFAULT '{}'::jsonb,
+            node_id         TEXT NOT NULL,
+            title           TEXT,
+            description     TEXT,
+            position        JSONB NOT NULL DEFAULT '{"x": 0, "y": 0}'::jsonb,
+            legacy_mongo_id TEXT,
+            PRIMARY KEY (id),
+            CONSTRAINT workflow_nodes_id_wf_ver_key
+                UNIQUE (id, workflow_id, graph_version)
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE workflow_edges (
+            id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            workflow_id   UUID NOT NULL REFERENCES workflows(id) ON DELETE CASCADE,
+            graph_version INTEGER NOT NULL,
+            from_node_id  UUID NOT NULL,
+            to_node_id    UUID NOT NULL,
+            config        JSONB NOT NULL DEFAULT '{}'::jsonb,
+            edge_id       TEXT NOT NULL,
+            source_handle TEXT,
+            target_handle TEXT,
+            CONSTRAINT workflow_edges_from_node_fk
+                FOREIGN KEY (from_node_id, workflow_id, graph_version)
+                REFERENCES workflow_nodes(id, workflow_id, graph_version) ON DELETE CASCADE,
+            CONSTRAINT workflow_edges_to_node_fk
+                FOREIGN KEY (to_node_id, workflow_id, graph_version)
+                REFERENCES workflow_nodes(id, workflow_id, graph_version) ON DELETE CASCADE
+        );
+        """
+    )
+
+    op.execute(
+        """
+        CREATE TABLE workflow_runs (
+            id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+            workflow_id     UUID NOT NULL REFERENCES workflows(id) ON DELETE CASCADE,
+            user_id         TEXT NOT NULL,
+            status          TEXT NOT NULL,
+            started_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
+            ended_at        TIMESTAMPTZ,
+            result          JSONB,
+            inputs          JSONB,
+            steps           JSONB NOT NULL DEFAULT '[]'::jsonb,
+            legacy_mongo_id TEXT,
+            CONSTRAINT workflow_runs_status_chk
+                CHECK (status IN ('pending', 'running', 'completed', 'failed'))
+        );
+        """
+    )
+
+    # ------------------------------------------------------------------
+    # Indexes
+    # ------------------------------------------------------------------
+    op.execute("CREATE INDEX agent_folders_user_idx ON agent_folders (user_id);")
+
+    op.execute("CREATE INDEX agents_user_idx   ON agents (user_id);")
+    op.execute("CREATE INDEX agents_shared_idx ON agents (shared) WHERE shared = true;")
+    op.execute("CREATE INDEX agents_status_idx ON agents (status);")
+    op.execute("CREATE INDEX agents_source_id_idx ON agents (source_id);")
+    op.execute("CREATE INDEX agents_prompt_id_idx ON agents (prompt_id);")
+    op.execute("CREATE INDEX agents_folder_id_idx ON agents (folder_id);")
+    op.execute(
+        "CREATE UNIQUE INDEX agents_legacy_mongo_id_uidx "
+        "ON agents (legacy_mongo_id) WHERE legacy_mongo_id IS NOT NULL;"
+    )
+
+    op.execute("CREATE INDEX attachments_user_idx ON attachments (user_id);")
+    op.execute(
+        "CREATE UNIQUE INDEX attachments_legacy_mongo_id_uidx "
+        "ON attachments (legacy_mongo_id) WHERE legacy_mongo_id IS NOT NULL;"
+    )
+
+    op.execute(
+        "CREATE UNIQUE INDEX connector_sessions_user_provider_uidx "
+        "ON connector_sessions (user_id, provider);"
+    )
+    op.execute(
+        "CREATE INDEX connector_sessions_expiry_idx "
+        "ON connector_sessions (expires_at) WHERE expires_at IS NOT NULL;"
+    )
+
+    op.execute(
+        "CREATE UNIQUE INDEX conversation_messages_conv_pos_uidx "
+        "ON conversation_messages (conversation_id, position);"
+    )
+    op.execute(
+        "CREATE INDEX conversation_messages_user_ts_idx "
+        "ON conversation_messages (user_id, timestamp DESC);"
+    )
+
+    op.execute("CREATE INDEX conversations_user_date_idx ON conversations (user_id, date DESC);")
+    op.execute("CREATE INDEX conversations_agent_idx    ON conversations (agent_id);")
+    op.execute(
+        "CREATE UNIQUE INDEX conversations_shared_token_uidx "
+        "ON conversations (shared_token) WHERE shared_token IS NOT NULL;"
+    )
+    op.execute(
+        "CREATE INDEX conversations_api_key_date_idx "
+        "ON conversations (api_key, date DESC) WHERE api_key IS NOT NULL;"
+    )
+    op.execute(
+        "CREATE UNIQUE INDEX conversations_legacy_mongo_id_uidx "
+        "ON conversations (legacy_mongo_id) WHERE legacy_mongo_id IS NOT NULL;"
+    )
+
+    op.execute(
+        "CREATE UNIQUE INDEX memories_user_tool_path_uidx "
+        "ON memories (user_id, tool_id, path);"
+    )
+    op.execute(
+        "CREATE UNIQUE INDEX memories_user_path_null_tool_uidx "
+        "ON memories (user_id, path) WHERE tool_id IS NULL;"
+    )
+    op.execute(
+        "CREATE INDEX memories_path_prefix_idx "
+        "ON memories (user_id, tool_id, path text_pattern_ops);"
+    )
+    op.execute("CREATE INDEX memories_tool_id_idx ON memories (tool_id);")
+
+    op.execute("CREATE UNIQUE INDEX notes_user_tool_uidx ON notes (user_id, tool_id);")
+    op.execute("CREATE INDEX notes_tool_id_idx ON notes (tool_id);")
+
+    op.execute(
+        "CREATE UNIQUE INDEX pending_tool_state_conv_user_uidx "
+        "ON pending_tool_state (conversation_id, user_id);"
+    )
+    op.execute(
+        "CREATE INDEX pending_tool_state_expires_idx ON pending_tool_state (expires_at);"
+    )
+
+    op.execute("CREATE INDEX prompts_user_id_idx ON prompts (user_id);")
+    op.execute(
+        "CREATE UNIQUE INDEX prompts_legacy_mongo_id_uidx "
+        "ON prompts (legacy_mongo_id) WHERE legacy_mongo_id IS NOT NULL;"
+    )
+
+    op.execute("CREATE INDEX shared_conversations_user_idx ON shared_conversations (user_id);")
+    op.execute("CREATE INDEX shared_conversations_conv_idx ON shared_conversations (conversation_id);")
+    op.execute(
+        "CREATE INDEX shared_conversations_prompt_id_idx ON shared_conversations (prompt_id);"
+    )
+    op.execute(
+        "CREATE UNIQUE INDEX shared_conversations_uuid_uidx ON shared_conversations (uuid);"
+    )
+    op.execute(
+        "CREATE UNIQUE INDEX shared_conversations_dedup_uidx "
+        "ON shared_conversations (conversation_id, user_id, is_promptable, first_n_queries, COALESCE(api_key, ''));"
+    )
+
+    op.execute("CREATE INDEX sources_user_idx ON sources (user_id);")
+
+    op.execute('CREATE INDEX stack_logs_timestamp_idx ON stack_logs ("timestamp" DESC);')
+    op.execute('CREATE INDEX stack_logs_user_ts_idx   ON stack_logs (user_id, "timestamp" DESC);')
+    op.execute('CREATE INDEX stack_logs_level_ts_idx  ON stack_logs (level, "timestamp" DESC);')
+    op.execute("CREATE INDEX stack_logs_activity_idx  ON stack_logs (activity_id);")
+
+    op.execute("CREATE INDEX todos_user_tool_idx ON todos (user_id, tool_id);")
+    op.execute("CREATE INDEX todos_tool_id_idx   ON todos (tool_id);")
+
+    op.execute('CREATE INDEX token_usage_user_ts_idx  ON token_usage (user_id, "timestamp" DESC);')
+    op.execute('CREATE INDEX token_usage_key_ts_idx   ON token_usage (api_key, "timestamp" DESC);')
+    op.execute('CREATE INDEX token_usage_agent_ts_idx ON token_usage (agent_id, "timestamp" DESC);')
+
+    op.execute('CREATE INDEX user_logs_user_ts_idx ON user_logs (user_id, "timestamp" DESC);')
+
+    op.execute("CREATE INDEX user_tools_user_id_idx ON user_tools (user_id);")
+
+    op.execute("CREATE INDEX workflow_edges_from_node_idx ON workflow_edges (from_node_id);")
+    op.execute("CREATE INDEX workflow_edges_to_node_idx   ON workflow_edges (to_node_id);")
+    op.execute(
+        "CREATE UNIQUE INDEX workflow_edges_wf_ver_eid_uidx "
+        "ON workflow_edges (workflow_id, graph_version, edge_id);"
+    )
+
+    op.execute(
+        "CREATE UNIQUE INDEX workflow_nodes_wf_ver_nid_uidx "
+        "ON workflow_nodes (workflow_id, graph_version, node_id);"
+    )
+    op.execute(
+        "CREATE UNIQUE INDEX workflow_nodes_legacy_mongo_id_uidx "
+        "ON workflow_nodes (legacy_mongo_id) WHERE legacy_mongo_id IS NOT NULL;"
+    )
+
+    op.execute("CREATE INDEX workflow_runs_workflow_idx ON workflow_runs (workflow_id);")
+    op.execute("CREATE INDEX workflow_runs_user_idx     ON workflow_runs (user_id);")
+    op.execute(
+        "CREATE INDEX workflow_runs_status_started_idx "
+        "ON workflow_runs (status, started_at DESC);"
+    )
+    op.execute(
+        "CREATE UNIQUE INDEX workflow_runs_legacy_mongo_id_uidx "
+        "ON workflow_runs (legacy_mongo_id) WHERE legacy_mongo_id IS NOT NULL;"
+    )
+
+    op.execute("CREATE INDEX workflows_user_idx ON workflows (user_id);")
+    op.execute(
+        "CREATE UNIQUE INDEX workflows_legacy_mongo_id_uidx "
+        "ON workflows (legacy_mongo_id) WHERE legacy_mongo_id IS NOT NULL;"
+    )
+
+    # ------------------------------------------------------------------
+    # user_id foreign keys (deferrable so backfills can stage rows)
+    # ------------------------------------------------------------------
+    user_fk_tables = (
+        "agent_folders",
+        "agents",
+        "attachments",
+        "connector_sessions",
+        "conversation_messages",
+        "conversations",
+        "memories",
+        "notes",
+        "pending_tool_state",
+        "prompts",
+        "shared_conversations",
+        "sources",
+        "stack_logs",
+        "todos",
+        "token_usage",
+        "user_logs",
+        "user_tools",
+        "workflow_runs",
+        "workflows",
+    )
+    for table in user_fk_tables:
+        op.execute(
+            f"ALTER TABLE {table} "
+            f"ADD CONSTRAINT {table}_user_id_fk "
+            f"FOREIGN KEY (user_id) REFERENCES users(user_id) "
+            f"ON DELETE RESTRICT DEFERRABLE INITIALLY IMMEDIATE;"
+        )
+
+    # ------------------------------------------------------------------
+    # Triggers
+    # ------------------------------------------------------------------
+    updated_at_tables = (
+        "agent_folders",
+        "agents",
+        "conversation_messages",
+        "conversations",
+        "memories",
+        "notes",
+        "prompts",
+        "sources",
+        "todos",
+        "user_tools",
+        "users",
+        "workflows",
+    )
+    for table in updated_at_tables:
+        op.execute(
+            f"CREATE TRIGGER {table}_set_updated_at "
+            f"BEFORE UPDATE ON {table} "
+            f"FOR EACH ROW WHEN (OLD.* IS DISTINCT FROM NEW.*) "
+            f"EXECUTE FUNCTION set_updated_at();"
+        )
+
+    ensure_user_tables = (
+        "agent_folders",
+        "agents",
+        "attachments",
+        "connector_sessions",
+        "conversation_messages",
+        "conversations",
+        "memories",
+        "notes",
+        "pending_tool_state",
+        "prompts",
+        "shared_conversations",
+        "sources",
+        "stack_logs",
+        "todos",
+        "token_usage",
+        "user_logs",
+        "user_tools",
+        "workflow_runs",
+        "workflows",
+    )
+    for table in ensure_user_tables:
+        op.execute(
+            f"CREATE TRIGGER {table}_ensure_user "
+            f"BEFORE INSERT OR UPDATE OF user_id ON {table} "
+            f"FOR EACH ROW EXECUTE FUNCTION ensure_user_exists();"
+        )
+
+    op.execute(
+        "CREATE TRIGGER conversation_messages_fill_user "
+        "BEFORE INSERT ON conversation_messages "
+        "FOR EACH ROW EXECUTE FUNCTION conversation_messages_fill_user_id();"
+    )
+
+    op.execute(
+        "CREATE TRIGGER attachments_cleanup_message_refs "
+        "AFTER DELETE ON attachments "
+        "FOR EACH ROW EXECUTE FUNCTION cleanup_message_attachment_refs();"
+    )
+    op.execute(
+        "CREATE TRIGGER agents_cleanup_user_prefs "
+        "AFTER DELETE ON agents "
+        "FOR EACH ROW EXECUTE FUNCTION cleanup_user_agent_prefs();"
+    )
+    op.execute(
+        "CREATE TRIGGER sources_cleanup_agent_extra_refs "
+        "AFTER DELETE ON sources "
+        "FOR EACH ROW EXECUTE FUNCTION cleanup_agent_extra_source_refs();"
+    )
+
+    # ------------------------------------------------------------------
+    # Seed sentinel __system__ user (system/template sources attribute here)
+    # ------------------------------------------------------------------
+    op.execute(
+        "INSERT INTO users (user_id) VALUES ('__system__') "
+        "ON CONFLICT (user_id) DO NOTHING;"
+    )
+
+
+def downgrade() -> None:
+    # Nuclear downgrade: drop everything this migration created. The
+    # ordering drops FK-bearing children before parents; CASCADE would
+    # also work but explicit ordering is easier to reason about in code
+    # review.
+    tables_in_drop_order = (
+        "workflow_edges",
+        "workflow_runs",
+        "workflow_nodes",
+        "workflows",
+        "pending_tool_state",
+        "shared_conversations",
+        "conversation_messages",
+        "conversations",
+        "connector_sessions",
+        "notes",
+        "todos",
+        "memories",
+        "attachments",
+        "agents",
+        "sources",
+        "agent_folders",
+        "stack_logs",
+        "user_logs",
+        "token_usage",
+        "user_tools",
+        "prompts",
+        "users",
+    )
+    for table in tables_in_drop_order:
+        op.execute(f"DROP TABLE IF EXISTS {table} CASCADE;")
+
+    for fn in (
+        "conversation_messages_fill_user_id",
+        "cleanup_user_agent_prefs",
+        "cleanup_agent_extra_source_refs",
+        "cleanup_message_attachment_refs",
+        "ensure_user_exists",
+        "set_updated_at",
+    ):
+        op.execute(f"DROP FUNCTION IF EXISTS {fn}();")

application/api/answer/__init__.py

@@ -3,6 +3,7 @@ from flask import Blueprint
 from application.api import api
 from application.api.answer.routes.answer import AnswerResource
 from application.api.answer.routes.base import answer_ns
+from application.api.answer.routes.search import SearchResource
 from application.api.answer.routes.stream import StreamResource
 
 
@@ -14,6 +15,7 @@ api.add_namespace(answer_ns)
 def init_answer_routes():
     api.add_resource(StreamResource, "/stream")
     api.add_resource(AnswerResource, "/api/answer")
+    api.add_resource(SearchResource, "/api/search")
 
 
 init_answer_routes()

application/api/answer/routes/answer.py

@@ -40,9 +40,9 @@ class AnswerResource(Resource, BaseAnswerResource):
             "chunks": fields.Integer(
                 required=False, default=2, description="Number of chunks"
             ),
-            "token_limit": fields.Integer(required=False, description="Token limit"),
             "retriever": fields.String(required=False, description="Retriever type"),
             "api_key": fields.String(required=False, description="API key"),
+            "agent_id": fields.String(required=False, description="Agent ID"),
             "active_docs": fields.String(
                 required=False, description="Active documents"
             ),
@@ -74,69 +74,80 @@ class AnswerResource(Resource, BaseAnswerResource):
         decoded_token = getattr(request, "decoded_token", None)
         processor = StreamProcessor(data, decoded_token)
         try:
-            processor.initialize()
-            if not processor.decoded_token:
-                return make_response({"error": "Unauthorized"}, 401)
+            # ---- Continuation mode ----
+            if data.get("tool_actions"):
+                (
+                    agent,
+                    messages,
+                    tools_dict,
+                    pending_tool_calls,
+                    tool_actions,
+                ) = processor.resume_from_tool_actions(
+                    data["tool_actions"], data["conversation_id"]
+                )
+                if not processor.decoded_token:
+                    return make_response({"error": "Unauthorized"}, 401)
+                if error := self.check_usage(processor.agent_config):
+                    return error
+                stream = self.complete_stream(
+                    question="",
+                    agent=agent,
+                    conversation_id=processor.conversation_id,
+                    user_api_key=processor.agent_config.get("user_api_key"),
+                    decoded_token=processor.decoded_token,
+                    agent_id=processor.agent_id,
+                    model_id=processor.model_id,
+                    _continuation={
+                        "messages": messages,
+                        "tools_dict": tools_dict,
+                        "pending_tool_calls": pending_tool_calls,
+                        "tool_actions": tool_actions,
+                    },
+                )
+            else:
+                # ---- Normal mode ----
+                agent = processor.build_agent(data.get("question", ""))
+                if not processor.decoded_token:
+                    return make_response({"error": "Unauthorized"}, 401)
 
-            docs_together, docs_list = processor.pre_fetch_docs(
-                data.get("question", "")
-            )
-            tools_data = processor.pre_fetch_tools()
+                if error := self.check_usage(processor.agent_config):
+                    return error
 
-            agent = processor.create_agent(
-                docs_together=docs_together,
-                docs=docs_list,
-                tools_data=tools_data,
-            )
+                stream = self.complete_stream(
+                    question=data["question"],
+                    agent=agent,
+                    conversation_id=processor.conversation_id,
+                    user_api_key=processor.agent_config.get("user_api_key"),
+                    decoded_token=processor.decoded_token,
+                    isNoneDoc=data.get("isNoneDoc"),
+                    index=None,
+                    should_save_conversation=data.get("save_conversation", True),
+                    agent_id=processor.agent_id,
+                    is_shared_usage=processor.is_shared_usage,
+                    shared_token=processor.shared_token,
+                    model_id=processor.model_id,
+                )
 
-            if error := self.check_usage(processor.agent_config):
-                return error
-
-            stream = self.complete_stream(
-                question=data["question"],
-                agent=agent,
-                conversation_id=processor.conversation_id,
-                user_api_key=processor.agent_config.get("user_api_key"),
-                decoded_token=processor.decoded_token,
-                isNoneDoc=data.get("isNoneDoc"),
-                index=None,
-                should_save_conversation=data.get("save_conversation", True),
-                model_id=processor.model_id,
-            )
             stream_result = self.process_response_stream(stream)
 
-            if len(stream_result) == 7:
-                (
-                    conversation_id,
-                    response,
-                    sources,
-                    tool_calls,
-                    thought,
-                    error,
-                    structured_info,
-                ) = stream_result
-            else:
-                conversation_id, response, sources, tool_calls, thought, error = (
-                    stream_result
-                )
-                structured_info = None
+            if stream_result["error"]:
+                return make_response({"error": stream_result["error"]}, 400)
 
-            if error:
-                return make_response({"error": error}, 400)
             result = {
-                "conversation_id": conversation_id,
-                "answer": response,
-                "sources": sources,
-                "tool_calls": tool_calls,
-                "thought": thought,
+                "conversation_id": stream_result["conversation_id"],
+                "answer": stream_result["answer"],
+                "sources": stream_result["sources"],
+                "tool_calls": stream_result["tool_calls"],
+                "thought": stream_result["thought"],
             }
 
-            if structured_info:
-                result.update(structured_info)
+            extra_info = stream_result.get("extra")
+            if extra_info:
+                result.update(extra_info)
         except Exception as e:
             logger.error(
                 f"/api/answer - error: {str(e)} - traceback: {traceback.format_exc()}",
                 extra={"error": str(e), "traceback": traceback.format_exc()},
             )
-            return make_response({"error": str(e)}, 500)
+            return make_response({"error": "An error occurred processing your request"}, 500)
         return make_response(result, 200)

application/api/answer/routes/base.py

@@ -6,6 +6,7 @@ from typing import Any, Dict, Generator, List, Optional
 from flask import jsonify, make_response, Response
 from flask_restx import Namespace
 
+from application.api.answer.services.continuation_service import ContinuationService
 from application.api.answer.services.conversation_service import ConversationService
 from application.core.model_utils import (
     get_api_key_for_provider,
@@ -15,6 +16,7 @@ from application.core.model_utils import (
 
 from application.core.mongo_db import MongoDB
 from application.core.settings import settings
+from application.error import sanitize_api_error
 from application.llm.llm_creator import LLMCreator
 from application.utils import check_required_fields
 
@@ -38,7 +40,16 @@ class BaseAnswerResource:
     def validate_request(
         self, data: Dict[str, Any], require_conversation_id: bool = False
     ) -> Optional[Response]:
-        """Common request validation"""
+        """Common request validation.
+
+        Continuation requests (``tool_actions`` present) require
+        ``conversation_id`` but not ``question``.
+        """
+        if data.get("tool_actions"):
+            # Continuation mode — question is not required
+            if missing := check_required_fields(data, ["conversation_id"]):
+                return missing
+            return None
         required_fields = ["question"]
         if require_conversation_id:
             required_fields.append("conversation_id")
@@ -46,6 +57,27 @@ class BaseAnswerResource:
             return missing_fields
         return None
 
+    @staticmethod
+    def _prepare_tool_calls_for_logging(
+        tool_calls: Optional[List[Dict[str, Any]]], max_chars: int = 10000
+    ) -> List[Dict[str, Any]]:
+        if not tool_calls:
+            return []
+
+        prepared = []
+        for tool_call in tool_calls:
+            if not isinstance(tool_call, dict):
+                prepared.append({"result": str(tool_call)[:max_chars]})
+                continue
+
+            item = dict(tool_call)
+            for key in ("result", "result_full"):
+                value = item.get(key)
+                if isinstance(value, str) and len(value) > max_chars:
+                    item[key] = value[:max_chars]
+            prepared.append(item)
+        return prepared
+
     def check_usage(self, agent_config: Dict) -> Optional[Response]:
         """Check if there is a usage limit and if it is exceeded
 
@@ -155,6 +187,7 @@ class BaseAnswerResource:
         is_shared_usage: bool = False,
         shared_token: Optional[str] = None,
         model_id: Optional[str] = None,
+        _continuation: Optional[Dict] = None,
     ) -> Generator[str, None, None]:
         """
         Generator function that streams the complete conversation response.
@@ -184,9 +217,23 @@ class BaseAnswerResource:
             is_structured = False
             schema_info = None
             structured_chunks = []
+            query_metadata = {}
+            paused = False
 
-            for line in agent.gen(query=question):
-                if "answer" in line:
+            if _continuation:
+                gen_iter = agent.gen_continuation(
+                    messages=_continuation["messages"],
+                    tools_dict=_continuation["tools_dict"],
+                    pending_tool_calls=_continuation["pending_tool_calls"],
+                    tool_actions=_continuation["tool_actions"],
+                )
+            else:
+                gen_iter = agent.gen(query=question)
+
+            for line in gen_iter:
+                if "metadata" in line:
+                    query_metadata.update(line["metadata"])
+                elif "answer" in line:
                     response_full += str(line["answer"])
                     if line.get("structured"):
                         is_structured = True
@@ -219,8 +266,21 @@ class BaseAnswerResource:
                     data = json.dumps({"type": "thought", "thought": line["thought"]})
                     yield f"data: {data}\n\n"
                 elif "type" in line:
-                    data = json.dumps(line)
-                    yield f"data: {data}\n\n"
+                    if line.get("type") == "tool_calls_pending":
+                        # Save continuation state and end the stream
+                        paused = True
+                        data = json.dumps(line)
+                        yield f"data: {data}\n\n"
+                    elif line.get("type") == "error":
+                        sanitized_error = {
+                            "type": "error",
+                            "error": sanitize_api_error(line.get("error", "An error occurred"))
+                        }
+                        data = json.dumps(sanitized_error)
+                        yield f"data: {data}\n\n"
+                    else:
+                        data = json.dumps(line)
+                        yield f"data: {data}\n\n"
             if is_structured and structured_chunks:
                 structured_data = {
                     "type": "structured_answer",
@@ -230,6 +290,93 @@ class BaseAnswerResource:
                 }
                 data = json.dumps(structured_data)
                 yield f"data: {data}\n\n"
+
+            # ---- Paused: save continuation state and end stream early ----
+            if paused:
+                continuation = getattr(agent, "_pending_continuation", None)
+                if continuation:
+                    # Ensure we have a conversation_id — create a partial
+                    # conversation if this is the first turn.
+                    if not conversation_id and should_save_conversation:
+                        try:
+                            provider = (
+                                get_provider_from_model_id(model_id)
+                                if model_id
+                                else settings.LLM_PROVIDER
+                            )
+                            sys_api_key = get_api_key_for_provider(
+                                provider or settings.LLM_PROVIDER
+                            )
+                            llm = LLMCreator.create_llm(
+                                provider or settings.LLM_PROVIDER,
+                                api_key=sys_api_key,
+                                user_api_key=user_api_key,
+                                decoded_token=decoded_token,
+                                model_id=model_id,
+                                agent_id=agent_id,
+                            )
+                            conversation_id = (
+                                self.conversation_service.save_conversation(
+                                    None,
+                                    question,
+                                    response_full,
+                                    thought,
+                                    source_log_docs,
+                                    tool_calls,
+                                    llm,
+                                    model_id or self.default_model_id,
+                                    decoded_token,
+                                    api_key=user_api_key,
+                                    agent_id=agent_id,
+                                    is_shared_usage=is_shared_usage,
+                                    shared_token=shared_token,
+                                )
+                            )
+                        except Exception as e:
+                            logger.error(
+                                f"Failed to create conversation for continuation: {e}",
+                                exc_info=True,
+                            )
+
+                    if conversation_id:
+                        try:
+                            cont_service = ContinuationService()
+                            cont_service.save_state(
+                                conversation_id=str(conversation_id),
+                                user=decoded_token.get("sub", "local"),
+                                messages=continuation["messages"],
+                                pending_tool_calls=continuation["pending_tool_calls"],
+                                tools_dict=continuation["tools_dict"],
+                                tool_schemas=getattr(agent, "tools", []),
+                                agent_config={
+                                    "model_id": model_id or self.default_model_id,
+                                    "llm_name": getattr(agent, "llm_name", settings.LLM_PROVIDER),
+                                    "api_key": getattr(agent, "api_key", None),
+                                    "user_api_key": user_api_key,
+                                    "agent_id": agent_id,
+                                    "agent_type": agent.__class__.__name__,
+                                    "prompt": getattr(agent, "prompt", ""),
+                                    "json_schema": getattr(agent, "json_schema", None),
+                                    "retriever_config": getattr(agent, "retriever_config", None),
+                                },
+                                client_tools=getattr(
+                                    agent.tool_executor, "client_tools", None
+                                ),
+                            )
+                        except Exception as e:
+                            logger.error(
+                                f"Failed to save continuation state: {str(e)}",
+                                exc_info=True,
+                            )
+
+                id_data = {"type": "id", "id": str(conversation_id)}
+                data = json.dumps(id_data)
+                yield f"data: {data}\n\n"
+
+                data = json.dumps({"type": "end"})
+                yield f"data: {data}\n\n"
+                return
+
             if isNoneDoc:
                 for doc in source_log_docs:
                     doc["source"] = "None"
@@ -246,6 +393,7 @@ class BaseAnswerResource:
                 user_api_key=user_api_key,
                 decoded_token=decoded_token,
                 model_id=model_id,
+                agent_id=agent_id,
             )
 
             if should_save_conversation:
@@ -265,6 +413,7 @@ class BaseAnswerResource:
                     is_shared_usage=is_shared_usage,
                     shared_token=shared_token,
                     attachment_ids=attachment_ids,
+                    metadata=query_metadata if query_metadata else None,
                 )
                 # Persist compression metadata/summary if it exists and wasn't saved mid-execution
                 compression_meta = getattr(agent, "compression_metadata", None)
@@ -292,14 +441,20 @@ class BaseAnswerResource:
             data = json.dumps(id_data)
             yield f"data: {data}\n\n"
 
+            tool_calls_for_logging = self._prepare_tool_calls_for_logging(
+                getattr(agent, "tool_calls", tool_calls) or tool_calls
+            )
+
             log_data = {
                 "action": "stream_answer",
                 "level": "info",
                 "user": decoded_token.get("sub"),
                 "api_key": user_api_key,
+                "agent_id": agent_id,
                 "question": question,
                 "response": response_full,
                 "sources": source_log_docs,
+                "tool_calls": tool_calls_for_logging,
                 "attachments": attachment_ids,
                 "timestamp": datetime.datetime.now(datetime.timezone.utc),
             }
@@ -314,6 +469,18 @@ class BaseAnswerResource:
                     log_data[key] = value[:10000]
             self.user_logs_collection.insert_one(log_data)
 
+            from application.storage.db.dual_write import dual_write
+            from application.storage.db.repositories.user_logs import UserLogsRepository
+
+            dual_write(
+                UserLogsRepository,
+                lambda repo, d=log_data: repo.insert(
+                    user_id=d.get("user"),
+                    endpoint="stream_answer",
+                    data=d,
+                ),
+            )
+
             data = json.dumps({"type": "end"})
             yield f"data: {data}\n\n"
         except GeneratorExit:
@@ -330,6 +497,7 @@ class BaseAnswerResource:
                         api_key=settings.API_KEY,
                         user_api_key=user_api_key,
                         decoded_token=decoded_token,
+                        agent_id=agent_id,
                     )
                     self.conversation_service.save_conversation(
                         conversation_id,
@@ -347,6 +515,7 @@ class BaseAnswerResource:
                         is_shared_usage=is_shared_usage,
                         shared_token=shared_token,
                         attachment_ids=attachment_ids,
+                        metadata=query_metadata if query_metadata else None,
                     )
                     compression_meta = getattr(agent, "compression_metadata", None)
                     compression_saved = getattr(agent, "compression_saved", False)
@@ -383,8 +552,13 @@ class BaseAnswerResource:
             yield f"data: {data}\n\n"
             return
 
-    def process_response_stream(self, stream):
-        """Process the stream response for non-streaming endpoint"""
+    def process_response_stream(self, stream) -> Dict[str, Any]:
+        """Process the stream response for non-streaming endpoint.
+
+        Returns:
+            Dict with keys: conversation_id, answer, sources, tool_calls,
+            thought, error, and optional extra.
+        """
         conversation_id = ""
         response_full = ""
         source_log_docs = []
@@ -393,6 +567,7 @@ class BaseAnswerResource:
         stream_ended = False
         is_structured = False
         schema_info = None
+        pending_tool_calls = None
 
         for line in stream:
             try:
@@ -411,11 +586,22 @@ class BaseAnswerResource:
                     source_log_docs = event["source"]
                 elif event["type"] == "tool_calls":
                     tool_calls = event["tool_calls"]
+                elif event["type"] == "tool_calls_pending":
+                    pending_tool_calls = event.get("data", {}).get(
+                        "pending_tool_calls", []
+                    )
                 elif event["type"] == "thought":
                     thought = event["thought"]
                 elif event["type"] == "error":
                     logger.error(f"Error from stream: {event['error']}")
-                    return None, None, None, None, event["error"], None
+                    return {
+                        "conversation_id": None,
+                        "answer": None,
+                        "sources": None,
+                        "tool_calls": None,
+                        "thought": None,
+                        "error": event["error"],
+                    }
                 elif event["type"] == "end":
                     stream_ended = True
             except (json.JSONDecodeError, KeyError) as e:
@@ -423,18 +609,30 @@ class BaseAnswerResource:
                 continue
         if not stream_ended:
             logger.error("Stream ended unexpectedly without an 'end' event.")
-            return None, None, None, None, "Stream ended unexpectedly", None
-        result = (
-            conversation_id,
-            response_full,
-            source_log_docs,
-            tool_calls,
-            thought,
-            None,
-        )
+            return {
+                "conversation_id": None,
+                "answer": None,
+                "sources": None,
+                "tool_calls": None,
+                "thought": None,
+                "error": "Stream ended unexpectedly",
+            }
+
+        result: Dict[str, Any] = {
+            "conversation_id": conversation_id,
+            "answer": response_full,
+            "sources": source_log_docs,
+            "tool_calls": tool_calls,
+            "thought": thought,
+            "error": None,
+        }
+
+        if pending_tool_calls is not None:
+            result["extra"] = {"pending_tool_calls": pending_tool_calls}
 
         if is_structured:
-            result = result + ({"structured": True, "schema": schema_info},)
+            result["extra"] = {"structured": True, "schema": schema_info}
+
         return result
 
     def error_stream_generate(self, err_response):

application/api/answer/routes/search.py

@@ -0,0 +1,186 @@
+import logging
+from typing import Any, Dict, List
+
+from flask import make_response, request
+from flask_restx import fields, Resource
+
+from bson.dbref import DBRef
+
+from application.api.answer.routes.base import answer_ns
+from application.core.mongo_db import MongoDB
+from application.core.settings import settings
+from application.vectorstore.vector_creator import VectorCreator
+
+logger = logging.getLogger(__name__)
+
+
+@answer_ns.route("/api/search")
+class SearchResource(Resource):
+    """Fast search endpoint for retrieving relevant documents"""
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        mongo = MongoDB.get_client()
+        self.db = mongo[settings.MONGO_DB_NAME]
+        self.agents_collection = self.db["agents"]
+
+    search_model = answer_ns.model(
+        "SearchModel",
+        {
+            "question": fields.String(
+                required=True, description="Search query"
+            ),
+            "api_key": fields.String(
+                required=True, description="API key for authentication"
+            ),
+            "chunks": fields.Integer(
+                required=False, default=5, description="Number of results to return"
+            ),
+        },
+    )
+
+    def _get_sources_from_api_key(self, api_key: str) -> List[str]:
+        """Get source IDs connected to the API key/agent.
+
+        """
+        agent_data = self.agents_collection.find_one({"key": api_key})
+        if not agent_data:
+            return []
+
+        source_ids = []
+
+        # Handle multiple sources (only if non-empty)
+        sources = agent_data.get("sources", [])
+        if sources and isinstance(sources, list) and len(sources) > 0:
+            for source_ref in sources:
+                # Skip "default" - it's a placeholder, not an actual vectorstore
+                if source_ref == "default":
+                    continue
+                elif isinstance(source_ref, DBRef):
+                    source_doc = self.db.dereference(source_ref)
+                    if source_doc:
+                        source_ids.append(str(source_doc["_id"]))
+
+        # Handle single source (legacy) - check if sources was empty or didn't yield results
+        if not source_ids:
+            source = agent_data.get("source")
+            if isinstance(source, DBRef):
+                source_doc = self.db.dereference(source)
+                if source_doc:
+                    source_ids.append(str(source_doc["_id"]))
+            # Skip "default" - it's a placeholder, not an actual vectorstore
+            elif source and source != "default":
+                source_ids.append(source)
+
+        return source_ids
+
+    def _search_vectorstores(
+        self, query: str, source_ids: List[str], chunks: int
+    ) -> List[Dict[str, Any]]:
+        """Search across vectorstores and return results"""
+        if not source_ids:
+            return []
+
+        results = []
+        chunks_per_source = max(1, chunks // len(source_ids))
+        seen_texts = set()
+
+        for source_id in source_ids:
+            if not source_id or not source_id.strip():
+                continue
+
+            try:
+                docsearch = VectorCreator.create_vectorstore(
+                    settings.VECTOR_STORE, source_id, settings.EMBEDDINGS_KEY
+                )
+                docs = docsearch.search(query, k=chunks_per_source * 2)
+
+                for doc in docs:
+                    if len(results) >= chunks:
+                        break
+
+                    if hasattr(doc, "page_content") and hasattr(doc, "metadata"):
+                        page_content = doc.page_content
+                        metadata = doc.metadata
+                    else:
+                        page_content = doc.get("text", doc.get("page_content", ""))
+                        metadata = doc.get("metadata", {})
+
+                    # Skip duplicates
+                    text_hash = hash(page_content[:200])
+                    if text_hash in seen_texts:
+                        continue
+                    seen_texts.add(text_hash)
+
+                    title = metadata.get(
+                        "title", metadata.get("post_title", "")
+                    )
+                    if not isinstance(title, str):
+                        title = str(title) if title else ""
+
+                    # Clean up title
+                    if title:
+                        title = title.split("/")[-1]
+                    else:
+                        # Use filename or first part of content as title
+                        title = metadata.get("filename", page_content[:50] + "...")
+
+                    source = metadata.get("source", source_id)
+
+                    results.append({
+                        "text": page_content,
+                        "title": title,
+                        "source": source,
+                    })
+
+                if len(results) >= chunks:
+                    break
+
+            except Exception as e:
+                logger.error(
+                    f"Error searching vectorstore {source_id}: {e}",
+                    exc_info=True,
+                )
+                continue
+
+        return results[:chunks]
+
+    @answer_ns.expect(search_model)
+    @answer_ns.doc(description="Search for relevant documents based on query")
+    def post(self):
+        data = request.get_json()
+
+        question = data.get("question")
+        api_key = data.get("api_key")
+        chunks = data.get("chunks", 5)
+
+        if not question:
+            return make_response({"error": "question is required"}, 400)
+
+        if not api_key:
+            return make_response({"error": "api_key is required"}, 400)
+
+        # Validate API key
+        agent = self.agents_collection.find_one({"key": api_key})
+        if not agent:
+            return make_response({"error": "Invalid API key"}, 401)
+
+        try:
+            # Get sources connected to this API key
+            source_ids = self._get_sources_from_api_key(api_key)
+
+            if not source_ids:
+                return make_response([], 200)
+
+            # Perform search
+            results = self._search_vectorstores(question, source_ids, chunks)
+
+            return make_response(results, 200)
+
+        except Exception as e:
+            logger.error(
+                f"/api/search - error: {str(e)}",
+                extra={"error": str(e)},
+                exc_info=True,
+            )
+            return make_response({"error": "Search failed"}, 500)

application/api/answer/routes/stream.py

@@ -40,9 +40,9 @@ class StreamResource(Resource, BaseAnswerResource):
             "chunks": fields.Integer(
                 required=False, default=2, description="Number of chunks"
             ),
-            "token_limit": fields.Integer(required=False, description="Token limit"),
             "retriever": fields.String(required=False, description="Retriever type"),
             "api_key": fields.String(required=False, description="API key"),
+            "agent_id": fields.String(required=False, description="Agent ID"),
             "active_docs": fields.String(
                 required=False, description="Active documents"
             ),
@@ -79,15 +79,54 @@ class StreamResource(Resource, BaseAnswerResource):
             return error
         decoded_token = getattr(request, "decoded_token", None)
         processor = StreamProcessor(data, decoded_token)
+
         try:
-            processor.initialize()
+            # ---- Continuation mode ----
+            if data.get("tool_actions"):
+                (
+                    agent,
+                    messages,
+                    tools_dict,
+                    pending_tool_calls,
+                    tool_actions,
+                ) = processor.resume_from_tool_actions(
+                    data["tool_actions"], data["conversation_id"]
+                )
+                if not processor.decoded_token:
+                    return Response(
+                        self.error_stream_generate("Unauthorized"),
+                        status=401,
+                        mimetype="text/event-stream",
+                    )
+                if error := self.check_usage(processor.agent_config):
+                    return error
+                return Response(
+                    self.complete_stream(
+                        question="",
+                        agent=agent,
+                        conversation_id=processor.conversation_id,
+                        user_api_key=processor.agent_config.get("user_api_key"),
+                        decoded_token=processor.decoded_token,
+                        agent_id=processor.agent_id,
+                        model_id=processor.model_id,
+                        _continuation={
+                            "messages": messages,
+                            "tools_dict": tools_dict,
+                            "pending_tool_calls": pending_tool_calls,
+                            "tool_actions": tool_actions,
+                        },
+                    ),
+                    mimetype="text/event-stream",
+                )
 
-            docs_together, docs_list = processor.pre_fetch_docs(data["question"])
-            tools_data = processor.pre_fetch_tools()
-
-            agent = processor.create_agent(
-                docs_together=docs_together, docs=docs_list, tools_data=tools_data
-            )
+            # ---- Normal mode ----
+            agent = processor.build_agent(data["question"])
+            if not processor.decoded_token:
+                return Response(
+                    self.error_stream_generate("Unauthorized"),
+                    status=401,
+                    mimetype="text/event-stream",
+                )
 
             if error := self.check_usage(processor.agent_config):
                 return error
@@ -102,7 +141,7 @@ class StreamResource(Resource, BaseAnswerResource):
                     index=data.get("index"),
                     should_save_conversation=data.get("save_conversation", True),
                     attachment_ids=data.get("attachments", []),
-                    agent_id=data.get("agent_id"),
+                    agent_id=processor.agent_id,
                     is_shared_usage=processor.is_shared_usage,
                     shared_token=processor.shared_token,
                     model_id=processor.model_id,

application/api/answer/services/compression/message_builder.py

@@ -1,5 +1,6 @@
 """Message reconstruction utilities for compression."""
 
+import json
 import logging
 import uuid
 from typing import Dict, List, Optional
@@ -49,28 +50,35 @@ class MessageBuilder:
             if include_tool_calls and "tool_calls" in query:
                 for tool_call in query["tool_calls"]:
                     call_id = tool_call.get("call_id") or str(uuid.uuid4())
-
-                    function_call_dict = {
-                        "function_call": {
-                            "name": tool_call.get("action_name"),
-                            "args": tool_call.get("arguments"),
-                            "call_id": call_id,
-                        }
-                    }
-                    function_response_dict = {
-                        "function_response": {
-                            "name": tool_call.get("action_name"),
-                            "response": {"result": tool_call.get("result")},
-                            "call_id": call_id,
-                        }
-                    }
-
-                    messages.append(
-                        {"role": "assistant", "content": [function_call_dict]}
+                    args = tool_call.get("arguments")
+                    args_str = (
+                        json.dumps(args)
+                        if isinstance(args, dict)
+                        else (args or "{}")
                     )
-                    messages.append(
-                        {"role": "tool", "content": [function_response_dict]}
+                    messages.append({
+                        "role": "assistant",
+                        "content": None,
+                        "tool_calls": [{
+                            "id": call_id,
+                            "type": "function",
+                            "function": {
+                                "name": tool_call.get("action_name", ""),
+                                "arguments": args_str,
+                            },
+                        }],
+                    })
+                    result = tool_call.get("result")
+                    result_str = (
+                        json.dumps(result)
+                        if not isinstance(result, str)
+                        else (result or "")
                     )
+                    messages.append({
+                        "role": "tool",
+                        "tool_call_id": call_id,
+                        "content": result_str,
+                    })
 
         # If no recent queries (everything was compressed), add a continuation user message
         if len(recent_queries) == 0 and compressed_summary:
@@ -180,28 +188,35 @@ class MessageBuilder:
             if include_tool_calls and "tool_calls" in query:
                 for tool_call in query["tool_calls"]:
                     call_id = tool_call.get("call_id") or str(uuid.uuid4())
-
-                    function_call_dict = {
-                        "function_call": {
-                            "name": tool_call.get("action_name"),
-                            "args": tool_call.get("arguments"),
-                            "call_id": call_id,
-                        }
-                    }
-                    function_response_dict = {
-                        "function_response": {
-                            "name": tool_call.get("action_name"),
-                            "response": {"result": tool_call.get("result")},
-                            "call_id": call_id,
-                        }
-                    }
-
-                    rebuilt_messages.append(
-                        {"role": "assistant", "content": [function_call_dict]}
+                    args = tool_call.get("arguments")
+                    args_str = (
+                        json.dumps(args)
+                        if isinstance(args, dict)
+                        else (args or "{}")
                     )
-                    rebuilt_messages.append(
-                        {"role": "tool", "content": [function_response_dict]}
+                    rebuilt_messages.append({
+                        "role": "assistant",
+                        "content": None,
+                        "tool_calls": [{
+                            "id": call_id,
+                            "type": "function",
+                            "function": {
+                                "name": tool_call.get("action_name", ""),
+                                "arguments": args_str,
+                            },
+                        }],
+                    })
+                    result = tool_call.get("result")
+                    result_str = (
+                        json.dumps(result)
+                        if not isinstance(result, str)
+                        else (result or "")
                     )
+                    rebuilt_messages.append({
+                        "role": "tool",
+                        "tool_call_id": call_id,
+                        "content": result_str,
+                    })
 
         # If no recent queries (everything was compressed), add a continuation user message
         if len(recent_queries) == 0 and compressed_summary:

application/api/answer/services/compression/orchestrator.py

@@ -134,6 +134,7 @@ class CompressionOrchestrator:
                 user_api_key=None,
                 decoded_token=decoded_token,
                 model_id=compression_model,
+                agent_id=conversation.get("agent_id"),
             )
 
             # Create compression service with DB update capability

application/api/answer/services/continuation_service.py

@@ -0,0 +1,175 @@
+"""Service for saving and restoring tool-call continuation state.
+
+When a stream pauses (tool needs approval or client-side execution),
+the full execution state is persisted to MongoDB so the client can
+resume later by sending tool_actions.
+"""
+
+import datetime
+import logging
+from typing import Any, Dict, List, Optional
+
+from bson import ObjectId
+
+from application.core.mongo_db import MongoDB
+from application.core.settings import settings
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.conversations import ConversationsRepository
+from application.storage.db.repositories.pending_tool_state import (
+    PendingToolStateRepository,
+)
+
+logger = logging.getLogger(__name__)
+
+# TTL for pending states — auto-cleaned after this period
+PENDING_STATE_TTL_SECONDS = 30 * 60  # 30 minutes
+
+
+def _make_serializable(obj: Any) -> Any:
+    """Recursively convert MongoDB ObjectIds and other non-JSON types."""
+    if isinstance(obj, ObjectId):
+        return str(obj)
+    if isinstance(obj, dict):
+        return {str(k): _make_serializable(v) for k, v in obj.items()}
+    if isinstance(obj, list):
+        return [_make_serializable(v) for v in obj]
+    if isinstance(obj, bytes):
+        return obj.decode("utf-8", errors="replace")
+    return obj
+
+
+class ContinuationService:
+    """Manages pending tool-call state in MongoDB."""
+
+    def __init__(self):
+        mongo = MongoDB.get_client()
+        db = mongo[settings.MONGO_DB_NAME]
+        self.collection = db["pending_tool_state"]
+        self._ensure_indexes()
+
+    def _ensure_indexes(self):
+        try:
+            self.collection.create_index(
+                "expires_at", expireAfterSeconds=0
+            )
+            self.collection.create_index(
+                [("conversation_id", 1), ("user", 1)], unique=True
+            )
+        except Exception:
+            # Indexes may already exist or mongomock doesn't support TTL
+            pass
+
+    def save_state(
+        self,
+        conversation_id: str,
+        user: str,
+        messages: List[Dict],
+        pending_tool_calls: List[Dict],
+        tools_dict: Dict,
+        tool_schemas: List[Dict],
+        agent_config: Dict,
+        client_tools: Optional[List[Dict]] = None,
+    ) -> str:
+        """Save execution state for later continuation.
+
+        Args:
+            conversation_id: The conversation this state belongs to.
+            user: Owner user ID.
+            messages: Full messages array at the pause point.
+            pending_tool_calls: Tool calls awaiting client action.
+            tools_dict: Serializable tools configuration dict.
+            tool_schemas: LLM-formatted tool schemas (agent.tools).
+            agent_config: Config needed to recreate the agent on resume.
+            client_tools: Client-provided tool schemas for client-side execution.
+
+        Returns:
+            The string ID of the saved state document.
+        """
+        now = datetime.datetime.now(datetime.timezone.utc)
+        expires_at = now + datetime.timedelta(seconds=PENDING_STATE_TTL_SECONDS)
+
+        doc = {
+            "conversation_id": conversation_id,
+            "user": user,
+            "messages": _make_serializable(messages),
+            "pending_tool_calls": _make_serializable(pending_tool_calls),
+            "tools_dict": _make_serializable(tools_dict),
+            "tool_schemas": _make_serializable(tool_schemas),
+            "agent_config": _make_serializable(agent_config),
+            "client_tools": _make_serializable(client_tools) if client_tools else None,
+            "created_at": now,
+            "expires_at": expires_at,
+        }
+
+        # Upsert — only one pending state per conversation per user
+        result = self.collection.replace_one(
+            {"conversation_id": conversation_id, "user": user},
+            doc,
+            upsert=True,
+        )
+        state_id = str(result.upserted_id) if result.upserted_id else conversation_id
+        logger.info(
+            f"Saved continuation state for conversation {conversation_id} "
+            f"with {len(pending_tool_calls)} pending tool call(s)"
+        )
+
+        # Dual-write to Postgres — upsert against the same Mongo conversation
+        # by resolving its UUID via conversations.legacy_mongo_id.
+        def _pg_save(_: PendingToolStateRepository) -> None:
+            conn = _._conn  # reuse the existing transaction
+            conv = ConversationsRepository(conn).get_by_legacy_id(conversation_id)
+            if conv is None:
+                return
+            _.save_state(
+                conv["id"],
+                user,
+                messages=_make_serializable(messages),
+                pending_tool_calls=_make_serializable(pending_tool_calls),
+                tools_dict=_make_serializable(tools_dict),
+                tool_schemas=_make_serializable(tool_schemas),
+                agent_config=_make_serializable(agent_config),
+                client_tools=_make_serializable(client_tools) if client_tools else None,
+            )
+
+        dual_write(PendingToolStateRepository, _pg_save)
+        return state_id
+
+    def load_state(
+        self, conversation_id: str, user: str
+    ) -> Optional[Dict[str, Any]]:
+        """Load pending continuation state.
+
+        Returns:
+            The state dict, or None if no pending state exists.
+        """
+        doc = self.collection.find_one(
+            {"conversation_id": conversation_id, "user": user}
+        )
+        if not doc:
+            return None
+        doc["_id"] = str(doc["_id"])
+        return doc
+
+    def delete_state(self, conversation_id: str, user: str) -> bool:
+        """Delete pending state after successful resumption.
+
+        Returns:
+            True if a document was deleted.
+        """
+        result = self.collection.delete_one(
+            {"conversation_id": conversation_id, "user": user}
+        )
+        if result.deleted_count:
+            logger.info(
+                f"Deleted continuation state for conversation {conversation_id}"
+            )
+
+        # Dual-write to Postgres — delete the same row.
+        def _pg_delete(repo: PendingToolStateRepository) -> None:
+            conv = ConversationsRepository(repo._conn).get_by_legacy_id(conversation_id)
+            if conv is None:
+                return
+            repo.delete_state(conv["id"], user)
+
+        dual_write(PendingToolStateRepository, _pg_delete)
+        return result.deleted_count > 0

application/api/answer/services/conversation_service.py

@@ -5,6 +5,8 @@ from typing import Any, Dict, List, Optional
 from application.core.mongo_db import MongoDB
 
 from application.core.settings import settings
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.conversations import ConversationsRepository
 from bson import ObjectId
 
 
@@ -60,8 +62,11 @@ class ConversationService:
         is_shared_usage: bool = False,
         shared_token: Optional[str] = None,
         attachment_ids: Optional[List[str]] = None,
+        metadata: Optional[Dict[str, Any]] = None,
     ) -> str:
         """Save or update a conversation in the database"""
+        if decoded_token is None:
+            raise ValueError("Invalid or missing authentication token")
         user_id = decoded_token.get("sub")
         if not user_id:
             raise ValueError("User ID not found in token")
@@ -91,6 +96,11 @@ class ConversationService:
                         f"queries.{index}.timestamp": current_time,
                         f"queries.{index}.attachments": attachment_ids,
                         f"queries.{index}.model_id": model_id,
+                        **(
+                            {f"queries.{index}.metadata": metadata}
+                            if metadata
+                            else {}
+                        ),
                     }
                 },
             )
@@ -105,6 +115,26 @@ class ConversationService:
                 },
                 {"$push": {"queries": {"$each": [], "$slice": index + 1}}},
             )
+            # Dual-write to Postgres: update the message at :index and
+            # truncate anything after it, mirroring Mongo's $set+$slice.
+            def _pg_update_at_index(repo: ConversationsRepository) -> None:
+                conv = repo.get_by_legacy_id(conversation_id)
+                if conv is None:
+                    return
+                repo.update_message_at(conv["id"], index, {
+                    "prompt": question,
+                    "response": response,
+                    "thought": thought,
+                    "sources": sources,
+                    "tool_calls": tool_calls,
+                    "attachments": attachment_ids,
+                    "model_id": model_id,
+                    "timestamp": current_time,
+                    **({"metadata": metadata} if metadata else {}),
+                })
+                repo.truncate_after(conv["id"], index)
+
+            dual_write(ConversationsRepository, _pg_update_at_index)
             return conversation_id
         elif conversation_id:
             # Append new message to existing conversation
@@ -122,6 +152,7 @@ class ConversationService:
                             "timestamp": current_time,
                             "attachments": attachment_ids,
                             "model_id": model_id,
+                            **({"metadata": metadata} if metadata else {}),
                         }
                     }
                 },
@@ -129,6 +160,25 @@ class ConversationService:
 
             if result.matched_count == 0:
                 raise ValueError("Conversation not found or unauthorized")
+
+            # Dual-write to Postgres: append the same message.
+            def _pg_append(repo: ConversationsRepository) -> None:
+                conv = repo.get_by_legacy_id(conversation_id)
+                if conv is None:
+                    return
+                repo.append_message(conv["id"], {
+                    "prompt": question,
+                    "response": response,
+                    "thought": thought,
+                    "sources": sources,
+                    "tool_calls": tool_calls,
+                    "attachments": attachment_ids,
+                    "model_id": model_id,
+                    "timestamp": current_time,
+                    "metadata": metadata or {},
+                })
+
+            dual_write(ConversationsRepository, _pg_append)
             return conversation_id
         else:
             # Create new conversation
@@ -148,25 +198,30 @@ class ConversationService:
             ]
 
             completion = llm.gen(
-                model=model_id, messages=messages_summary, max_tokens=30
+                model=model_id, messages=messages_summary, max_tokens=500
             )
 
+            if not completion or not completion.strip():
+                completion = question[:50] if question else "New Conversation"
+
+            query_doc = {
+                "prompt": question,
+                "response": response,
+                "thought": thought,
+                "sources": sources,
+                "tool_calls": tool_calls,
+                "timestamp": current_time,
+                "attachments": attachment_ids,
+                "model_id": model_id,
+            }
+            if metadata:
+                query_doc["metadata"] = metadata
+
             conversation_data = {
                 "user": user_id,
                 "date": current_time,
                 "name": completion,
-                "queries": [
-                    {
-                        "prompt": question,
-                        "response": response,
-                        "thought": thought,
-                        "sources": sources,
-                        "tool_calls": tool_calls,
-                        "timestamp": current_time,
-                        "attachments": attachment_ids,
-                        "model_id": model_id,
-                    }
-                ],
+                "queries": [query_doc],
             }
 
             if api_key:
@@ -179,7 +234,34 @@ class ConversationService:
                 if agent:
                     conversation_data["api_key"] = agent["key"]
             result = self.conversations_collection.insert_one(conversation_data)
-            return str(result.inserted_id)
+            inserted_id = str(result.inserted_id)
+
+            # Dual-write to Postgres: create the conversation row with
+            # legacy_mongo_id and append the first message.
+            def _pg_create(repo: ConversationsRepository) -> None:
+                conv = repo.create(
+                    user_id,
+                    completion,
+                    agent_id=conversation_data.get("agent_id"),
+                    api_key=conversation_data.get("api_key"),
+                    is_shared_usage=conversation_data.get("is_shared_usage", False),
+                    shared_token=conversation_data.get("shared_token"),
+                    legacy_mongo_id=inserted_id,
+                )
+                repo.append_message(conv["id"], {
+                    "prompt": question,
+                    "response": response,
+                    "thought": thought,
+                    "sources": sources,
+                    "tool_calls": tool_calls,
+                    "attachments": attachment_ids,
+                    "model_id": model_id,
+                    "timestamp": current_time,
+                    "metadata": metadata or {},
+                })
+
+            dual_write(ConversationsRepository, _pg_create)
+            return inserted_id
 
     def update_compression_metadata(
         self, conversation_id: str, compression_metadata: Dict[str, Any]
@@ -216,6 +298,24 @@ class ConversationService:
             logger.info(
                 f"Updated compression metadata for conversation {conversation_id}"
             )
+
+            # Dual-write to Postgres: mirror $set + $push $slice.
+            def _pg_compression(repo: ConversationsRepository) -> None:
+                conv = repo.get_by_legacy_id(conversation_id)
+                if conv is None:
+                    return
+                repo.set_compression_flags(
+                    conv["id"],
+                    is_compressed=True,
+                    last_compression_at=compression_metadata.get("timestamp"),
+                )
+                repo.append_compression_point(
+                    conv["id"],
+                    compression_metadata,
+                    max_points=settings.COMPRESSION_MAX_HISTORY_POINTS,
+                )
+
+            dual_write(ConversationsRepository, _pg_compression)
         except Exception as e:
             logger.error(
                 f"Error updating compression metadata: {str(e)}", exc_info=True
@@ -252,6 +352,23 @@ class ConversationService:
                     }
                 },
             )
+
+            def _pg_append_summary(repo: ConversationsRepository) -> None:
+                conv = repo.get_by_legacy_id(conversation_id)
+                if conv is None:
+                    return
+                repo.append_message(conv["id"], {
+                    "prompt": "[Context Compression Summary]",
+                    "response": summary,
+                    "thought": "",
+                    "sources": [],
+                    "tool_calls": [],
+                    "attachments": [],
+                    "model_id": compression_metadata.get("model_used"),
+                    "timestamp": timestamp,
+                })
+
+            dual_write(ConversationsRepository, _pg_append_summary)
             logger.info(f"Appended compression summary to conversation {conversation_id}")
         except Exception as e:
             logger.error(

application/api/answer/services/stream_processor.py

@@ -38,13 +38,23 @@ def get_prompt(prompt_id: str, prompts_collection=None) -> str:
     current_dir = Path(__file__).resolve().parents[3]
     prompts_dir = current_dir / "prompts"
 
-    preset_mapping = {
+    # Maps for classic agent types
+    CLASSIC_PRESETS = {
         "default": "chat_combine_default.txt",
         "creative": "chat_combine_creative.txt",
         "strict": "chat_combine_strict.txt",
         "reduce": "chat_reduce_prompt.txt",
     }
 
+    # Agentic counterparts — same styles, but with search tool instructions
+    AGENTIC_PRESETS = {
+        "default": "agentic/default.txt",
+        "creative": "agentic/creative.txt",
+        "strict": "agentic/strict.txt",
+    }
+
+    preset_mapping = {**CLASSIC_PRESETS, **{f"agentic_{k}": v for k, v in AGENTIC_PRESETS.items()}}
+
     if prompt_id in preset_mapping:
         file_path = os.path.join(prompts_dir, preset_mapping[prompt_id])
         try:
@@ -90,6 +100,8 @@ class StreamProcessor:
         self.retriever_config = {}
         self.is_shared_usage = False
         self.shared_token = None
+        self.agent_id = self.data.get("agent_id")
+        self.agent_key = None
         self.model_id: Optional[str] = None
         self.conversation_service = ConversationService()
         self.compression_orchestrator = CompressionOrchestrator(
@@ -100,6 +112,7 @@ class StreamProcessor:
         self._required_tool_actions: Optional[Dict[str, Set[Optional[str]]]] = None
         self.compressed_summary: Optional[str] = None
         self.compressed_summary_tokens: int = 0
+        self._agent_data: Optional[Dict[str, Any]] = None
 
     def initialize(self):
         """Initialize all required components for processing"""
@@ -110,6 +123,29 @@ class StreamProcessor:
         self._load_conversation_history()
         self._process_attachments()
 
+    def build_agent(self, question: str):
+        """One call to go from request data to a ready-to-run agent.
+
+        Combines initialize(), pre_fetch_docs(), pre_fetch_tools(), and
+        create_agent() into a single convenience method.
+        """
+        self.initialize()
+
+        agent_type = self.agent_config.get("agent_type", "classic")
+
+        # Agentic/research agents skip pre-fetch — the LLM searches on-demand via tools
+        if agent_type in ("agentic", "research"):
+            tools_data = self.pre_fetch_tools()
+            return self.create_agent(tools_data=tools_data)
+
+        docs_together, docs_list = self.pre_fetch_docs(question)
+        tools_data = self.pre_fetch_tools()
+        return self.create_agent(
+            docs_together=docs_together,
+            docs=docs_list,
+            tools_data=tools_data,
+        )
+
     def _load_conversation_history(self):
         """Load conversation history either from DB or request"""
         if self.conversation_id and self.initial_user_id:
@@ -123,9 +159,17 @@ class StreamProcessor:
             if settings.ENABLE_CONVERSATION_COMPRESSION:
                 self._handle_compression(conversation)
             else:
-                # Original behavior - load all history
+                # Original behavior - load all history (include metadata if present)
                 self.history = [
-                    {"prompt": query["prompt"], "response": query["response"]}
+                    {
+                        "prompt": query["prompt"],
+                        "response": query["response"],
+                        **(
+                            {"metadata": query["metadata"]}
+                            if "metadata" in query
+                            else {}
+                        ),
+                    }
                     for query in conversation.get("queries", [])
                 ]
         else:
@@ -134,14 +178,8 @@ class StreamProcessor:
             )
 
     def _handle_compression(self, conversation: Dict[str, Any]):
-        """
-        Handle conversation compression logic using orchestrator.
-
-        Args:
-            conversation: Full conversation document
-        """
+        """Handle conversation compression logic using orchestrator."""
         try:
-            # Use orchestrator to handle all compression logic
             result = self.compression_orchestrator.compress_if_needed(
                 conversation_id=self.conversation_id,
                 user_id=self.initial_user_id,
@@ -150,16 +188,17 @@ class StreamProcessor:
             )
 
             if not result.success:
-                logger.error(
-                    f"Compression failed: {result.error}, using full history"
-                )
+                logger.error(f"Compression failed: {result.error}, using full history")
                 self.history = [
-                    {"prompt": query["prompt"], "response": query["response"]}
+                    {
+                        "prompt": query["prompt"],
+                        "response": query["response"],
+                        **({"metadata": query["metadata"]} if "metadata" in query else {}),
+                    }
                     for query in conversation.get("queries", [])
                 ]
                 return
 
-            # Set compressed summary if compression was performed
             if result.compression_performed and result.compressed_summary:
                 self.compressed_summary = result.compressed_summary
                 self.compressed_summary_tokens = TokenCounter.count_message_tokens(
@@ -170,17 +209,27 @@ class StreamProcessor:
                     f"+ {len(result.recent_queries)} recent messages"
                 )
 
-            # Build history from recent queries
             self.history = result.as_history()
+            # Preserve metadata from recent queries (as_history only has prompt/response)
+            recent = result.recent_queries if result.recent_queries else conversation.get("queries", [])
+            for i, entry in enumerate(self.history):
+                # Match by index from the end of recent queries
+                offset = len(recent) - len(self.history)
+                qi = offset + i
+                if 0 <= qi < len(recent) and "metadata" in recent[qi]:
+                    entry["metadata"] = recent[qi]["metadata"]
 
         except Exception as e:
             logger.error(
                 f"Error handling compression, falling back to standard history: {str(e)}",
                 exc_info=True,
             )
-            # Fallback to original behavior
             self.history = [
-                {"prompt": query["prompt"], "response": query["response"]}
+                {
+                    "prompt": query["prompt"],
+                    "response": query["response"],
+                    **({"metadata": query["metadata"]} if "metadata" in query else {}),
+                }
                 for query in conversation.get("queries", [])
             ]
 
@@ -192,9 +241,6 @@ class StreamProcessor:
         )
 
     def _get_attachments_content(self, attachment_ids, user_id):
-        """
-        Retrieve content from attachment documents based on their IDs.
-        """
         if not attachment_ids:
             return []
         attachments = []
@@ -203,7 +249,6 @@ class StreamProcessor:
                 attachment_doc = self.attachments_collection.find_one(
                     {"_id": ObjectId(attachment_id), "user": user_id}
                 )
-
                 if attachment_doc:
                     attachments.append(attachment_doc)
             except Exception as e:
@@ -225,11 +270,14 @@ class StreamProcessor:
                 raise ValueError(
                     f"Invalid model_id '{requested_model}'. "
                     f"Available models: {', '.join(available_models[:5])}"
-                    + (f" and {len(available_models) - 5} more" if len(available_models) > 5 else "")
+                    + (
+                        f" and {len(available_models) - 5} more"
+                        if len(available_models) > 5
+                        else ""
+                    )
                 )
             self.model_id = requested_model
         else:
-            # Check if agent has a default model configured
             agent_default_model = self.agent_config.get("default_model_id", "")
             if agent_default_model and validate_model_id(agent_default_model):
                 self.model_id = agent_default_model
@@ -282,7 +330,6 @@ class StreamProcessor:
             data["source"] = "default"
         else:
             data["source"] = None
-        # Handle multiple sources
 
         sources = data.get("sources", [])
         if sources and isinstance(sources, list):
@@ -308,28 +355,34 @@ class StreamProcessor:
         else:
             data["sources"] = []
 
-        # Preserve model configuration from agent
         data["default_model_id"] = data.get("default_model_id", "")
 
         return data
 
     def _configure_source(self):
-        """Configure the source based on agent data"""
-        api_key = self.data.get("api_key") or self.agent_key
+        """Configure the source based on agent data.
 
-        if api_key:
-            agent_data = self._get_data_from_api_key(api_key)
+        The literal string ``"default"`` is a placeholder meaning "no
+        ingested source" and is normalized to an empty source so that no
+        retrieval is attempted.
+        """
+        if self._agent_data:
+            agent_data = self._agent_data
 
             if agent_data.get("sources") and len(agent_data["sources"]) > 0:
                 source_ids = [
-                    source["id"] for source in agent_data["sources"] if source.get("id")
+                    source["id"]
+                    for source in agent_data["sources"]
+                    if source.get("id") and source["id"] != "default"
                 ]
                 if source_ids:
                     self.source = {"active_docs": source_ids}
                 else:
                     self.source = {}
-                self.all_sources = agent_data["sources"]
-            elif agent_data.get("source"):
+                self.all_sources = [
+                    s for s in agent_data["sources"] if s.get("id") != "default"
+                ]
+            elif agent_data.get("source") and agent_data["source"] != "default":
                 self.source = {"active_docs": agent_data["source"]}
                 self.all_sources = [
                     {
@@ -342,77 +395,113 @@ class StreamProcessor:
                 self.all_sources = []
             return
         if "active_docs" in self.data:
-            self.source = {"active_docs": self.data["active_docs"]}
+            active_docs = self.data["active_docs"]
+            if active_docs and active_docs != "default":
+                self.source = {"active_docs": active_docs}
+            else:
+                self.source = {}
             return
         self.source = {}
         self.all_sources = []
 
+    def _has_active_docs(self) -> bool:
+        """Return True if a real document source is configured for retrieval."""
+        active_docs = self.source.get("active_docs") if self.source else None
+        if not active_docs:
+            return False
+        if active_docs == "default":
+            return False
+        return True
+
+    def _resolve_agent_id(self) -> Optional[str]:
+        """Resolve agent_id from request, then fall back to conversation context."""
+        request_agent_id = self.data.get("agent_id")
+        if request_agent_id:
+            return str(request_agent_id)
+
+        if not self.conversation_id or not self.initial_user_id:
+            return None
+
+        try:
+            conversation = self.conversation_service.get_conversation(
+                self.conversation_id, self.initial_user_id
+            )
+        except Exception:
+            return None
+
+        if not conversation:
+            return None
+
+        conversation_agent_id = conversation.get("agent_id")
+        if conversation_agent_id:
+            return str(conversation_agent_id)
+
+        return None
+
     def _configure_agent(self):
-        """Configure the agent based on request data"""
-        agent_id = self.data.get("agent_id")
+        """Configure the agent based on request data.
+
+        Unified flow: resolve the effective API key, then extract config once.
+        """
+        agent_id = self._resolve_agent_id()
+
         self.agent_key, self.is_shared_usage, self.shared_token = self._get_agent_key(
             agent_id, self.initial_user_id
         )
+        self.agent_id = str(agent_id) if agent_id else None
+
+        # Determine the effective API key (explicit > agent-derived)
+        effective_key = self.data.get("api_key") or self.agent_key
+
+        if effective_key:
+            self._agent_data = self._get_data_from_api_key(effective_key)
+            if self._agent_data.get("_id"):
+                self.agent_id = str(self._agent_data.get("_id"))
 
-        api_key = self.data.get("api_key")
-        if api_key:
-            data_key = self._get_data_from_api_key(api_key)
             self.agent_config.update(
                 {
-                    "prompt_id": data_key.get("prompt_id", "default"),
-                    "agent_type": data_key.get("agent_type", settings.AGENT_NAME),
-                    "user_api_key": api_key,
-                    "json_schema": data_key.get("json_schema"),
-                    "default_model_id": data_key.get("default_model_id", ""),
+                    "prompt_id": self._agent_data.get("prompt_id", "default"),
+                    "agent_type": self._agent_data.get("agent_type", settings.AGENT_NAME),
+                    "user_api_key": effective_key,
+                    "json_schema": self._agent_data.get("json_schema"),
+                    "default_model_id": self._agent_data.get("default_model_id", ""),
+                    "models": self._agent_data.get("models", []),
+                    "allow_system_prompt_override": self._agent_data.get(
+                        "allow_system_prompt_override", False
+                    ),
                 }
             )
-            self.initial_user_id = data_key.get("user")
-            self.decoded_token = {"sub": data_key.get("user")}
-            if data_key.get("source"):
-                self.source = {"active_docs": data_key["source"]}
-            if data_key.get("retriever"):
-                self.retriever_config["retriever_name"] = data_key["retriever"]
-            if data_key.get("chunks") is not None:
-                try:
-                    self.retriever_config["chunks"] = int(data_key["chunks"])
-                except (ValueError, TypeError):
-                    logger.warning(
-                        f"Invalid chunks value: {data_key['chunks']}, using default value 2"
-                    )
-                    self.retriever_config["chunks"] = 2
-        elif self.agent_key:
-            data_key = self._get_data_from_api_key(self.agent_key)
-            self.agent_config.update(
-                {
-                    "prompt_id": data_key.get("prompt_id", "default"),
-                    "agent_type": data_key.get("agent_type", settings.AGENT_NAME),
-                    "user_api_key": self.agent_key,
-                    "json_schema": data_key.get("json_schema"),
-                    "default_model_id": data_key.get("default_model_id", ""),
-                }
-            )
-            self.decoded_token = (
-                self.decoded_token
-                if self.is_shared_usage
-                else {"sub": data_key.get("user")}
-            )
-            if data_key.get("source"):
-                self.source = {"active_docs": data_key["source"]}
-            if data_key.get("retriever"):
-                self.retriever_config["retriever_name"] = data_key["retriever"]
-            if data_key.get("chunks") is not None:
-                try:
-                    self.retriever_config["chunks"] = int(data_key["chunks"])
-                except (ValueError, TypeError):
-                    logger.warning(
-                        f"Invalid chunks value: {data_key['chunks']}, using default value 2"
-                    )
-                    self.retriever_config["chunks"] = 2
+
+            # Set identity context
+            if self.data.get("api_key"):
+                # External API key: use the key owner's identity
+                self.initial_user_id = self._agent_data.get("user")
+                self.decoded_token = {"sub": self._agent_data.get("user")}
+            elif self.is_shared_usage:
+                # Shared agent: keep the caller's identity
+                pass
+            else:
+                # Owner using their own agent
+                self.decoded_token = {"sub": self._agent_data.get("user")}
+
+            if self._agent_data.get("workflow"):
+                self.agent_config["workflow"] = self._agent_data["workflow"]
+                self.agent_config["workflow_owner"] = self._agent_data.get("user")
         else:
+            # No API key — default/workflow configuration
+            agent_type = settings.AGENT_NAME
+            if self.data.get("workflow") and isinstance(
+                self.data.get("workflow"), dict
+            ):
+                agent_type = "workflow"
+                self.agent_config["workflow"] = self.data["workflow"]
+                if isinstance(self.decoded_token, dict):
+                    self.agent_config["workflow_owner"] = self.decoded_token.get("sub")
+
             self.agent_config.update(
                 {
                     "prompt_id": self.data.get("prompt_id", "default"),
-                    "agent_type": settings.AGENT_NAME,
+                    "agent_type": agent_type,
                     "user_api_key": None,
                     "json_schema": None,
                     "default_model_id": "",
@@ -420,18 +509,45 @@ class StreamProcessor:
             )
 
     def _configure_retriever(self):
-        history_token_limit = int(self.data.get("token_limit", 2000))
-        doc_token_limit = calculate_doc_token_budget(
-            model_id=self.model_id, history_token_limit=history_token_limit
-        )
+        """Assemble retriever config with precedence: request > agent > default."""
+        doc_token_limit = calculate_doc_token_budget(model_id=self.model_id)
+
+        # Start with defaults
+        retriever_name = "classic"
+        chunks = 2
+
+        # Layer agent-level config (if present)
+        if self._agent_data:
+            if self._agent_data.get("retriever"):
+                retriever_name = self._agent_data["retriever"]
+            if self._agent_data.get("chunks") is not None:
+                try:
+                    chunks = int(self._agent_data["chunks"])
+                except (ValueError, TypeError):
+                    logger.warning(
+                        f"Invalid agent chunks value: {self._agent_data['chunks']}, "
+                        "using default value 2"
+                    )
+
+        # Explicit request values win over agent config
+        if "retriever" in self.data:
+            retriever_name = self.data["retriever"]
+        if "chunks" in self.data:
+            try:
+                chunks = int(self.data["chunks"])
+            except (ValueError, TypeError):
+                logger.warning(
+                    f"Invalid request chunks value: {self.data['chunks']}, "
+                    "using default value 2"
+                )
 
         self.retriever_config = {
-            "retriever_name": self.data.get("retriever", "classic"),
-            "chunks": int(self.data.get("chunks", 2)),
+            "retriever_name": retriever_name,
+            "chunks": chunks,
             "doc_token_limit": doc_token_limit,
-            "history_token_limit": history_token_limit,
         }
 
+        # isNoneDoc without an API key forces no retrieval
         api_key = self.data.get("api_key") or self.agent_key
         if not api_key and "isNoneDoc" in self.data and self.data["isNoneDoc"]:
             self.retriever_config["chunks"] = 0
@@ -446,14 +562,18 @@ class StreamProcessor:
             doc_token_limit=self.retriever_config.get("doc_token_limit", 50000),
             model_id=self.model_id,
             user_api_key=self.agent_config["user_api_key"],
+            agent_id=self.agent_id,
             decoded_token=self.decoded_token,
         )
 
     def pre_fetch_docs(self, question: str) -> tuple[Optional[str], Optional[list]]:
         """Pre-fetch documents for template rendering before agent creation"""
-        if self.data.get("isNoneDoc", False):
+        if self.data.get("isNoneDoc", False) and not self.agent_id:
             logger.info("Pre-fetch skipped: isNoneDoc=True")
             return None, None
+        if not self._has_active_docs():
+            logger.info("Pre-fetch skipped: no active docs configured")
+            return None, None
         try:
             retriever = self.create_retriever()
             logger.info(
@@ -485,12 +605,7 @@ class StreamProcessor:
             return None, None
 
     def pre_fetch_tools(self) -> Optional[Dict[str, Any]]:
-        """Pre-fetch tool data for template rendering before agent creation
-
-        Can be controlled via:
-        1. Global setting: ENABLE_TOOL_PREFETCH in .env
-        2. Per-request: disable_tool_prefetch in request data
-        """
+        """Pre-fetch tool data for template rendering before agent creation"""
         if not settings.ENABLE_TOOL_PREFETCH:
             logger.info(
                 "Tool pre-fetching disabled globally via ENABLE_TOOL_PREFETCH setting"
@@ -702,6 +817,121 @@ class StreamProcessor:
             logger.warning(f"Failed to fetch memory tool data: {str(e)}")
             return None
 
+    def resume_from_tool_actions(
+        self,
+        tool_actions: list,
+        conversation_id: str,
+    ):
+        """Resume a paused agent from saved continuation state.
+
+        Loads the pending state from MongoDB, recreates the agent with
+        the saved configuration, and returns an agent ready to call
+        ``gen_continuation()``.
+
+        Args:
+            tool_actions: Client-provided actions (approvals / results).
+            conversation_id: The conversation being resumed.
+
+        Returns:
+            Tuple of (agent, messages, tools_dict, pending_tool_calls, tool_actions).
+        """
+        from application.api.answer.services.continuation_service import (
+            ContinuationService,
+        )
+        from application.agents.agent_creator import AgentCreator
+        from application.agents.tool_executor import ToolExecutor
+        from application.llm.handlers.handler_creator import LLMHandlerCreator
+        from application.llm.llm_creator import LLMCreator
+
+        cont_service = ContinuationService()
+        state = cont_service.load_state(conversation_id, self.initial_user_id)
+        if not state:
+            raise ValueError("No pending tool state found for this conversation")
+
+        messages = state["messages"]
+        pending_tool_calls = state["pending_tool_calls"]
+        tools_dict = state["tools_dict"]
+        tool_schemas = state.get("tool_schemas", [])
+        agent_config = state["agent_config"]
+
+        model_id = agent_config.get("model_id")
+        llm_name = agent_config.get("llm_name", settings.LLM_PROVIDER)
+        api_key = agent_config.get("api_key")
+        user_api_key = agent_config.get("user_api_key")
+        agent_id = agent_config.get("agent_id")
+        prompt = agent_config.get("prompt", "")
+        json_schema = agent_config.get("json_schema")
+        retriever_config = agent_config.get("retriever_config")
+
+        # Recreate dependencies
+        system_api_key = api_key or get_api_key_for_provider(llm_name)
+        llm = LLMCreator.create_llm(
+            llm_name,
+            api_key=system_api_key,
+            user_api_key=user_api_key,
+            decoded_token=self.decoded_token,
+            model_id=model_id,
+            agent_id=agent_id,
+        )
+        llm_handler = LLMHandlerCreator.create_handler(llm_name or "default")
+        tool_executor = ToolExecutor(
+            user_api_key=user_api_key,
+            user=self.initial_user_id,
+            decoded_token=self.decoded_token,
+        )
+        tool_executor.conversation_id = conversation_id
+        # Restore client tools so they stay available for subsequent LLM calls
+        saved_client_tools = state.get("client_tools")
+        if saved_client_tools:
+            tool_executor.client_tools = saved_client_tools
+            # Re-merge into tools_dict (they may have been stripped during serialization)
+            tool_executor.merge_client_tools(tools_dict, saved_client_tools)
+
+        agent_type = agent_config.get("agent_type", "ClassicAgent")
+        # Map class names back to agent creator keys
+        type_map = {
+            "ClassicAgent": "classic",
+            "AgenticAgent": "agentic",
+            "ResearchAgent": "research",
+            "WorkflowAgent": "workflow",
+        }
+        agent_key = type_map.get(agent_type, "classic")
+
+        agent_kwargs = {
+            "endpoint": "stream",
+            "llm_name": llm_name,
+            "model_id": model_id,
+            "api_key": system_api_key,
+            "agent_id": agent_id,
+            "user_api_key": user_api_key,
+            "prompt": prompt,
+            "chat_history": [],
+            "decoded_token": self.decoded_token,
+            "json_schema": json_schema,
+            "llm": llm,
+            "llm_handler": llm_handler,
+            "tool_executor": tool_executor,
+        }
+
+        if agent_key in ("agentic", "research") and retriever_config:
+            agent_kwargs["retriever_config"] = retriever_config
+
+        agent = AgentCreator.create_agent(agent_key, **agent_kwargs)
+        agent.conversation_id = conversation_id
+        agent.initial_user_id = self.initial_user_id
+        agent.tools = tool_schemas
+
+        # Store config for the route layer
+        self.model_id = model_id
+        self.agent_id = agent_id
+        self.agent_config["user_api_key"] = user_api_key
+        self.conversation_id = conversation_id
+
+        # Delete state so it can't be replayed
+        cont_service.delete_state(conversation_id, self.initial_user_id)
+
+        return agent, messages, tools_dict, pending_tool_calls, tool_actions
+
     def create_agent(
         self,
         docs_together: Optional[str] = None,
@@ -709,22 +939,40 @@ class StreamProcessor:
         tools_data: Optional[Dict[str, Any]] = None,
     ):
         """Create and return the configured agent with rendered prompt"""
+        agent_type = self.agent_config["agent_type"]
+
+        # For agentic agents, swap standard presets for their agentic
+        # counterparts (which include search tool instructions instead of
+        # {summaries}). Custom / user-provided prompts pass through as-is.
         raw_prompt = self._get_prompt_content()
         if raw_prompt is None:
-            raw_prompt = get_prompt(
-                self.agent_config["prompt_id"], self.prompts_collection
-            )
+            prompt_id = self.agent_config.get("prompt_id", "default")
+            agentic_presets = {"default", "creative", "strict"}
+            if agent_type in ("agentic", "research") and prompt_id in agentic_presets:
+                raw_prompt = get_prompt(
+                    f"agentic_{prompt_id}", self.prompts_collection
+                )
+            else:
+                raw_prompt = get_prompt(prompt_id, self.prompts_collection)
             self._prompt_content = raw_prompt
 
-        rendered_prompt = self.prompt_renderer.render_prompt(
-            prompt_content=raw_prompt,
-            user_id=self.initial_user_id,
-            request_id=self.data.get("request_id"),
-            passthrough_data=self.data.get("passthrough"),
-            docs=docs,
-            docs_together=docs_together,
-            tools_data=tools_data,
-        )
+        # Allow API callers to override the system prompt when the agent
+        # has opted in via allow_system_prompt_override.
+        if (
+            self.agent_config.get("allow_system_prompt_override", False)
+            and self.data.get("system_prompt_override")
+        ):
+            rendered_prompt = self.data["system_prompt_override"]
+        else:
+            rendered_prompt = self.prompt_renderer.render_prompt(
+                prompt_content=raw_prompt,
+                user_id=self.initial_user_id,
+                request_id=self.data.get("request_id"),
+                passthrough_data=self.data.get("passthrough"),
+                docs=docs,
+                docs_together=docs_together,
+                tools_data=tools_data,
+            )
 
         provider = (
             get_provider_from_model_id(self.model_id)
@@ -733,21 +981,90 @@ class StreamProcessor:
         )
         system_api_key = get_api_key_for_provider(provider or settings.LLM_PROVIDER)
 
-        agent = AgentCreator.create_agent(
-            self.agent_config["agent_type"],
-            endpoint="stream",
-            llm_name=provider or settings.LLM_PROVIDER,
-            model_id=self.model_id,
+        # Create LLM and handler (dependency injection)
+        from application.llm.llm_creator import LLMCreator
+        from application.llm.handlers.handler_creator import LLMHandlerCreator
+        from application.agents.tool_executor import ToolExecutor
+
+        # Compute backup models: agent's configured models minus the active one
+        agent_models = self.agent_config.get("models", [])
+        backup_models = [m for m in agent_models if m != self.model_id]
+
+        llm = LLMCreator.create_llm(
+            provider or settings.LLM_PROVIDER,
             api_key=system_api_key,
             user_api_key=self.agent_config["user_api_key"],
-            prompt=rendered_prompt,
-            chat_history=self.history,
-            retrieved_docs=self.retrieved_docs,
             decoded_token=self.decoded_token,
-            attachments=self.attachments,
-            json_schema=self.agent_config.get("json_schema"),
-            compressed_summary=self.compressed_summary,
+            model_id=self.model_id,
+            agent_id=self.agent_id,
+            backup_models=backup_models,
         )
+        llm_handler = LLMHandlerCreator.create_handler(
+            provider if provider else "default"
+        )
+
+        user = self.decoded_token.get("sub") if self.decoded_token else None
+        tool_executor = ToolExecutor(
+            user_api_key=self.agent_config["user_api_key"],
+            user=user,
+            decoded_token=self.decoded_token,
+        )
+        tool_executor.conversation_id = self.conversation_id
+        # Pass client-side tools so they get merged in get_tools()
+        client_tools = self.data.get("client_tools")
+        if client_tools:
+            tool_executor.client_tools = client_tools
+
+        # Base agent kwargs
+        agent_kwargs = {
+            "endpoint": "stream",
+            "llm_name": provider or settings.LLM_PROVIDER,
+            "model_id": self.model_id,
+            "api_key": system_api_key,
+            "agent_id": self.agent_id,
+            "user_api_key": self.agent_config["user_api_key"],
+            "prompt": rendered_prompt,
+            "chat_history": self.history,
+            "retrieved_docs": self.retrieved_docs,
+            "decoded_token": self.decoded_token,
+            "attachments": self.attachments,
+            "json_schema": self.agent_config.get("json_schema"),
+            "compressed_summary": self.compressed_summary,
+            "llm": llm,
+            "llm_handler": llm_handler,
+            "tool_executor": tool_executor,
+        }
+
+        # Type-specific kwargs
+        if agent_type in ("agentic", "research"):
+            agent_kwargs["retriever_config"] = {
+                "source": self.source,
+                "retriever_name": self.retriever_config.get(
+                    "retriever_name", "classic"
+                ),
+                "chunks": self.retriever_config.get("chunks", 2),
+                "doc_token_limit": self.retriever_config.get(
+                    "doc_token_limit", 50000
+                ),
+                "model_id": self.model_id,
+                "user_api_key": self.agent_config["user_api_key"],
+                "agent_id": self.agent_id,
+                "llm_name": provider or settings.LLM_PROVIDER,
+                "api_key": system_api_key,
+                "decoded_token": self.decoded_token,
+            }
+
+        elif agent_type == "workflow":
+            workflow_config = self.agent_config.get("workflow")
+            if isinstance(workflow_config, str):
+                agent_kwargs["workflow_id"] = workflow_config
+            elif isinstance(workflow_config, dict):
+                agent_kwargs["workflow"] = workflow_config
+            workflow_owner = self.agent_config.get("workflow_owner")
+            if workflow_owner:
+                agent_kwargs["workflow_owner"] = workflow_owner
+
+        agent = AgentCreator.create_agent(agent_type, **agent_kwargs)
 
         agent.conversation_id = self.conversation_id
         agent.initial_user_id = self.initial_user_id

application/api/connector/routes.py

@@ -1,7 +1,9 @@
 import base64
 import datetime
+import html
 import json
 import uuid
+from urllib.parse import urlencode
 
 
 from bson.objectid import ObjectId
@@ -35,6 +37,18 @@ connector = Blueprint("connector", __name__)
 connectors_ns = Namespace("connectors", description="Connector operations", path="/")
 api.add_namespace(connectors_ns)
 
+# Fixed callback status path to prevent open redirect
+CALLBACK_STATUS_PATH = "/api/connectors/callback-status"
+
+
+def build_callback_redirect(params: dict) -> str:
+    """Build a safe redirect URL to the callback status page.
+
+    Uses a fixed path and properly URL-encodes all parameters
+    to prevent URL injection and open redirect vulnerabilities.
+    """
+    return f"{CALLBACK_STATUS_PATH}?{urlencode(params)}"
+
 
 
 @connectors_ns.route("/api/connectors/auth")
@@ -75,8 +89,8 @@ class ConnectorAuth(Resource):
                 "state": state
             }), 200)
         except Exception as e:
-            current_app.logger.error(f"Error generating connector auth URL: {e}")
-            return make_response(jsonify({"success": False, "error": str(e)}), 500)
+            current_app.logger.error(f"Error generating connector auth URL: {e}", exc_info=True)
+            return make_response(jsonify({"success": False, "error": "Failed to generate authorization URL"}), 500)
 
 
 @connectors_ns.route("/api/connectors/callback")
@@ -93,18 +107,37 @@ class ConnectorsCallback(Resource):
             error = request.args.get('error')
 
             state_dict = json.loads(base64.urlsafe_b64decode(state.encode()).decode())
-            provider = state_dict["provider"]
-            state_object_id = state_dict["object_id"]
+            provider = state_dict.get("provider")
+            state_object_id = state_dict.get("object_id")
+
+            # Validate provider
+            if not provider or not isinstance(provider, str) or not ConnectorCreator.is_supported(provider):
+                return redirect(build_callback_redirect({
+                    "status": "error",
+                    "message": "Invalid provider"
+                }))
 
             if error:
                 if error == "access_denied":
-                    return redirect(f"/api/connectors/callback-status?status=cancelled&message=Authentication+was+cancelled.+You+can+try+again+if+you'd+like+to+connect+your+account.&provider={provider}")
+                    return redirect(build_callback_redirect({
+                        "status": "cancelled",
+                        "message": "Authentication was cancelled. You can try again if you'd like to connect your account.",
+                        "provider": provider
+                    }))
                 else:
                     current_app.logger.warning(f"OAuth error in callback: {error}")
-                    return redirect(f"/api/connectors/callback-status?status=error&message=Authentication+failed.+Please+try+again+and+make+sure+to+grant+all+requested+permissions.&provider={provider}")
+                    return redirect(build_callback_redirect({
+                        "status": "error",
+                        "message": "Authentication failed. Please try again and make sure to grant all requested permissions.",
+                        "provider": provider
+                    }))
 
             if not authorization_code:
-                return redirect(f"/api/connectors/callback-status?status=error&message=Authentication+failed.+Please+try+again+and+make+sure+to+grant+all+requested+permissions.&provider={provider}")
+                return redirect(build_callback_redirect({
+                    "status": "error",
+                    "message": "Authentication failed. Please try again and make sure to grant all requested permissions.",
+                    "provider": provider
+                }))
 
             try:
                 auth = ConnectorCreator.create_auth(provider)
@@ -113,20 +146,19 @@ class ConnectorsCallback(Resource):
                 session_token = str(uuid.uuid4())
 
                 try:
-                    credentials = auth.create_credentials_from_token_info(token_info)
-                    service = auth.build_drive_service(credentials)
-                    user_info = service.about().get(fields="user").execute()
-                    user_email = user_info.get('user', {}).get('emailAddress', 'Connected User')
+                    if provider == "google_drive":
+                        credentials = auth.create_credentials_from_token_info(token_info)
+                        service = auth.build_drive_service(credentials)
+                        user_info = service.about().get(fields="user").execute()
+                        user_email = user_info.get('user', {}).get('emailAddress', 'Connected User')
+                    else:
+                        user_email = token_info.get('user_info', {}).get('email', 'Connected User')
+
                 except Exception as e:
                     current_app.logger.warning(f"Could not get user info: {e}")
                     user_email = 'Connected User'
 
-                sanitized_token_info = {
-                    "access_token": token_info.get("access_token"),
-                    "refresh_token": token_info.get("refresh_token"),
-                    "token_uri": token_info.get("token_uri"),
-                    "expiry": token_info.get("expiry")
-                }
+                sanitized_token_info = auth.sanitize_token_info(token_info)
 
                 sessions_collection.find_one_and_update(
                     {"_id": ObjectId(state_object_id), "provider": provider},
@@ -141,26 +173,39 @@ class ConnectorsCallback(Resource):
                 )
 
                 # Redirect to success page with session token and user email
-                return redirect(f"/api/connectors/callback-status?status=success&message=Authentication+successful&provider={provider}&session_token={session_token}&user_email={user_email}")
+                return redirect(build_callback_redirect({
+                    "status": "success",
+                    "message": "Authentication successful",
+                    "provider": provider,
+                    "session_token": session_token,
+                    "user_email": user_email
+                }))
 
             except Exception as e:
                 current_app.logger.error(f"Error exchanging code for tokens: {str(e)}", exc_info=True)
-                return redirect(f"/api/connectors/callback-status?status=error&message=Authentication+failed.+Please+try+again+and+make+sure+to+grant+all+requested+permissions.&provider={provider}")
+                return redirect(build_callback_redirect({
+                    "status": "error",
+                    "message": "Authentication failed. Please try again and make sure to grant all requested permissions.",
+                    "provider": provider
+                }))
 
         except Exception as e:
             current_app.logger.error(f"Error handling connector callback: {e}")
-            return redirect("/api/connectors/callback-status?status=error&message=Authentication+failed.+Please+try+again+and+make+sure+to+grant+all+requested+permissions.")
+            return redirect(build_callback_redirect({
+                "status": "error",
+                "message": "Authentication failed. Please try again and make sure to grant all requested permissions."
+            }))
 
 
 @connectors_ns.route("/api/connectors/files")
 class ConnectorFiles(Resource):
     @api.expect(api.model("ConnectorFilesModel", {
-        "provider": fields.String(required=True), 
-        "session_token": fields.String(required=True), 
-        "folder_id": fields.String(required=False), 
-        "limit": fields.Integer(required=False), 
+        "provider": fields.String(required=True),
+        "session_token": fields.String(required=True),
+        "folder_id": fields.String(required=False),
+        "limit": fields.Integer(required=False),
         "page_token": fields.String(required=False),
-        "search_query": fields.String(required=False)
+        "search_query": fields.String(required=False),
     }))
     @api.doc(description="List files from a connector provider (supports pagination and search)")
     def post(self):
@@ -168,11 +213,8 @@ class ConnectorFiles(Resource):
             data = request.get_json()
             provider = data.get('provider')
             session_token = data.get('session_token')
-            folder_id = data.get('folder_id')
             limit = data.get('limit', 10)
-            page_token = data.get('page_token')
-            search_query = data.get('search_query')
-            
+
             if not provider or not session_token:
                 return make_response(jsonify({"success": False, "error": "provider and session_token are required"}), 400)
 
@@ -185,15 +227,12 @@ class ConnectorFiles(Resource):
                 return make_response(jsonify({"success": False, "error": "Invalid or unauthorized session"}), 401)
 
             loader = ConnectorCreator.create_connector(provider, session_token)
+
+            generic_keys = {'provider', 'session_token'}
             input_config = {
-                'limit': limit,
-                'list_only': True,
-                'session_token': session_token,
-                'folder_id': folder_id,
-                'page_token': page_token
+                k: v for k, v in data.items() if k not in generic_keys
             }
-            if search_query:
-                input_config['search_query'] = search_query
+            input_config['list_only'] = True
                 
             documents = loader.load_data(input_config)
 
@@ -228,8 +267,8 @@ class ConnectorFiles(Resource):
                 "has_more": has_more
             }), 200)
         except Exception as e:
-            current_app.logger.error(f"Error loading connector files: {e}")
-            return make_response(jsonify({"success": False, "error": f"Failed to load files: {str(e)}"}), 500)
+            current_app.logger.error(f"Error loading connector files: {e}", exc_info=True)
+            return make_response(jsonify({"success": False, "error": "Failed to load files"}), 500)
 
 
 @connectors_ns.route("/api/connectors/validate-session")
@@ -260,12 +299,7 @@ class ConnectorValidateSession(Resource):
             if is_expired and token_info.get('refresh_token'):
                 try:
                     refreshed_token_info = auth.refresh_access_token(token_info.get('refresh_token'))
-                    sanitized_token_info = {
-                    "access_token": refreshed_token_info.get("access_token"),
-                    "refresh_token": refreshed_token_info.get("refresh_token"),
-                    "token_uri": refreshed_token_info.get("token_uri"),
-                    "expiry": refreshed_token_info.get("expiry")
-                }    
+                    sanitized_token_info = auth.sanitize_token_info(refreshed_token_info)
                     sessions_collection.update_one(
                         {"session_token": session_token},
                         {"$set": {"token_info": sanitized_token_info}}
@@ -282,15 +316,21 @@ class ConnectorValidateSession(Resource):
                     "error": "Session token has expired. Please reconnect."
                 }), 401)
 
-            return make_response(jsonify({
+            _base_fields = {"access_token", "refresh_token", "token_uri", "expiry"}
+            provider_extras = {k: v for k, v in token_info.items() if k not in _base_fields}
+
+            response_data = {
                 "success": True,
                 "expired": False,
                 "user_email": session.get('user_email', 'Connected User'),
-                "access_token": token_info.get('access_token')
-            }), 200)
+                "access_token": token_info.get('access_token'),
+                **provider_extras,
+            }
+
+            return make_response(jsonify(response_data), 200)
         except Exception as e:
-            current_app.logger.error(f"Error validating connector session: {e}")
-            return make_response(jsonify({"success": False, "error": str(e)}), 500)
+            current_app.logger.error(f"Error validating connector session: {e}", exc_info=True)
+            return make_response(jsonify({"success": False, "error": "Failed to validate session"}), 500)
 
 
 @connectors_ns.route("/api/connectors/disconnect")
@@ -311,8 +351,8 @@ class ConnectorDisconnect(Resource):
             
             return make_response(jsonify({"success": True}), 200)
         except Exception as e:
-            current_app.logger.error(f"Error disconnecting connector session: {e}")
-            return make_response(jsonify({"success": False, "error": str(e)}), 500)
+            current_app.logger.error(f"Error disconnecting connector session: {e}", exc_info=True)
+            return make_response(jsonify({"success": False, "error": "Failed to disconnect session"}), 500)
 
 
 @connectors_ns.route("/api/connectors/sync")
@@ -418,8 +458,8 @@ class ConnectorSync(Resource):
             return make_response(
                 jsonify({
                     "success": False,
-                    "error": str(err)
-                }), 
+                    "error": "Failed to sync connector source"
+                }),
                 400
             )
 
@@ -430,17 +470,32 @@ class ConnectorCallbackStatus(Resource):
     def get(self):
         """Return HTML page with connector authentication status"""
         try:
-            status = request.args.get('status', 'error')
-            message = request.args.get('message', '')
-            provider = request.args.get('provider', 'connector')
+            # Validate and sanitize status to a known value
+            status_raw = request.args.get('status', 'error')
+            status = status_raw if status_raw in ('success', 'error', 'cancelled') else 'error'
+
+            # Escape all user-controlled values for HTML context
+            message = html.escape(request.args.get('message', ''))
+            provider_raw = request.args.get('provider', 'connector')
+            provider = html.escape(provider_raw.replace('_', ' ').title())
             session_token = request.args.get('session_token', '')
-            user_email = request.args.get('user_email', '')
-            
+            user_email = html.escape(request.args.get('user_email', ''))
+
+            def safe_js_string(value: str) -> str:
+                """Safely encode a string for embedding in inline JavaScript."""
+                js_encoded = json.dumps(value)
+                return js_encoded.replace('</', '<\\/').replace('<!--', '<\\!--')
+
+            js_status = safe_js_string(status)
+            js_session_token = safe_js_string(session_token)
+            js_user_email = safe_js_string(user_email)
+            js_provider_type = safe_js_string(provider_raw)
+
             html_content = f"""
             <!DOCTYPE html>
             <html>
             <head>
-                <title>{provider.replace('_', ' ').title()} Authentication</title>
+                <title>{provider} Authentication</title>
                 <style>
                     body {{ font-family: Arial, sans-serif; text-align: center; padding: 40px; }}
                     .container {{ max-width: 600px; margin: 0 auto; }}
@@ -450,13 +505,14 @@ class ConnectorCallbackStatus(Resource):
                 </style>
                 <script>
                     window.onload = function() {{
-                        const status = "{status}";
-                        const sessionToken = "{session_token}";
-                        const userEmail = "{user_email}";
+                        const status = {js_status};
+                        const sessionToken = {js_session_token};
+                        const userEmail = {js_user_email};
+                        const providerType = {js_provider_type};
 
                         if (status === "success" && window.opener) {{
                             window.opener.postMessage({{
-                                type: '{provider}_auth_success',
+                                type: providerType + '_auth_success',
                                 session_token: sessionToken,
                                 user_email: userEmail
                             }}, '*');
@@ -470,17 +526,17 @@ class ConnectorCallbackStatus(Resource):
             </head>
             <body>
                 <div class="container">
-                    <h2>{provider.replace('_', ' ').title()} Authentication</h2>
+                    <h2>{provider} Authentication</h2>
                     <div class="{status}">
                         <p>{message}</p>
                         {f'<p>Connected as: {user_email}</p>' if status == 'success' else ''}
                     </div>
-                    <p><small>You can close this window. {f"Your {provider.replace('_', ' ').title()} is now connected and ready to use." if status == 'success' else "Feel free to close this window."}</small></p>
+                    <p><small>You can close this window. {f"Your {provider} is now connected and ready to use." if status == 'success' else "Feel free to close this window."}</small></p>
                 </div>
             </body>
             </html>
             """
-            
+
             return make_response(html_content, 200, {'Content-Type': 'text/html'})
         except Exception as e:
             current_app.logger.error(f"Error rendering callback status page: {e}")

application/api/internal/routes.py

@@ -26,12 +26,20 @@ internal = Blueprint("internal", __name__)
 
 @internal.before_request
 def verify_internal_key():
-    """Verify INTERNAL_KEY for all internal endpoint requests."""
-    if settings.INTERNAL_KEY:
-        internal_key = request.headers.get("X-Internal-Key")
-        if not internal_key or internal_key != settings.INTERNAL_KEY:
-            logger.warning(f"Unauthorized internal API access attempt from {request.remote_addr}")
-            return jsonify({"error": "Unauthorized", "message": "Invalid or missing internal key"}), 401
+    """Verify INTERNAL_KEY for all internal endpoint requests.
+
+    Deny by default: if INTERNAL_KEY is not configured, reject all requests.
+    """
+    if not settings.INTERNAL_KEY:
+        logger.warning(
+            f"Internal API request rejected from {request.remote_addr}: "
+            "INTERNAL_KEY is not configured"
+        )
+        return jsonify({"error": "Unauthorized", "message": "Internal API is not configured"}), 401
+    internal_key = request.headers.get("X-Internal-Key")
+    if not internal_key or internal_key != settings.INTERNAL_KEY:
+        logger.warning(f"Unauthorized internal API access attempt from {request.remote_addr}")
+        return jsonify({"error": "Unauthorized", "message": "Invalid or missing internal key"}), 401
 
 
 @internal.route("/api/download", methods=["get"])
@@ -61,6 +69,7 @@ def upload_index_files():
     
     file_path = request.form.get("file_path")
     directory_structure = request.form.get("directory_structure")
+    file_name_map = request.form.get("file_name_map")
     
     if directory_structure:
         try:
@@ -70,6 +79,14 @@ def upload_index_files():
             directory_structure = {}
     else:
         directory_structure = {}
+    if file_name_map:
+        try:
+            file_name_map = json.loads(file_name_map)
+        except Exception:
+            logger.error("Error parsing file_name_map")
+            file_name_map = None
+    else:
+        file_name_map = None
 
     storage = StorageCreator.get_storage()
     index_base_path = f"indexes/{id}"
@@ -97,41 +114,43 @@ def upload_index_files():
 
     existing_entry = sources_collection.find_one({"_id": ObjectId(id)})
     if existing_entry:
+        update_fields = {
+            "user": user,
+            "name": job_name,
+            "language": job_name,
+            "date": datetime.datetime.now(),
+            "model": settings.EMBEDDINGS_NAME,
+            "type": type,
+            "tokens": tokens,
+            "retriever": retriever,
+            "remote_data": remote_data,
+            "sync_frequency": sync_frequency,
+            "file_path": file_path,
+            "directory_structure": directory_structure,
+        }
+        if file_name_map is not None:
+            update_fields["file_name_map"] = file_name_map
         sources_collection.update_one(
             {"_id": ObjectId(id)},
-            {
-                "$set": {
-                    "user": user,
-                    "name": job_name,
-                    "language": job_name,
-                    "date": datetime.datetime.now(),
-                    "model": settings.EMBEDDINGS_NAME,
-                    "type": type,
-                    "tokens": tokens,
-                    "retriever": retriever,
-                    "remote_data": remote_data,
-                    "sync_frequency": sync_frequency,
-                    "file_path": file_path,
-                    "directory_structure": directory_structure,
-                }
-            },
+            {"$set": update_fields},
         )
     else:
-        sources_collection.insert_one(
-            {
-                "_id": ObjectId(id),
-                "user": user,
-                "name": job_name,
-                "language": job_name,
-                "date": datetime.datetime.now(),
-                "model": settings.EMBEDDINGS_NAME,
-                "type": type,
-                "tokens": tokens,
-                "retriever": retriever,
-                "remote_data": remote_data,
-                "sync_frequency": sync_frequency,
-                "file_path": file_path,
-                "directory_structure": directory_structure,
-            }
-        )
+        insert_doc = {
+            "_id": ObjectId(id),
+            "user": user,
+            "name": job_name,
+            "language": job_name,
+            "date": datetime.datetime.now(),
+            "model": settings.EMBEDDINGS_NAME,
+            "type": type,
+            "tokens": tokens,
+            "retriever": retriever,
+            "remote_data": remote_data,
+            "sync_frequency": sync_frequency,
+            "file_path": file_path,
+            "directory_structure": directory_structure,
+        }
+        if file_name_map is not None:
+            insert_doc["file_name_map"] = file_name_map
+        sources_collection.insert_one(insert_doc)
     return {"status": "ok"}

application/api/user/agents/__init__.py

@@ -3,5 +3,6 @@
 from .routes import agents_ns
 from .sharing import agents_sharing_ns
 from .webhooks import agents_webhooks_ns
+from .folders import agents_folders_ns
 
-__all__ = ["agents_ns", "agents_sharing_ns", "agents_webhooks_ns"]
+__all__ = ["agents_ns", "agents_sharing_ns", "agents_webhooks_ns", "agents_folders_ns"]

application/api/user/agents/folders.py

@@ -0,0 +1,276 @@
+"""
+Agent folders management routes.
+Provides virtual folder organization for agents (Google Drive-like structure).
+"""
+
+import datetime
+from bson.objectid import ObjectId
+from flask import current_app, jsonify, make_response, request
+from flask_restx import Namespace, Resource, fields
+
+from application.api import api
+from application.api.user.base import (
+    agent_folders_collection,
+    agents_collection,
+)
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.agent_folders import AgentFoldersRepository
+
+agents_folders_ns = Namespace(
+    "agents_folders", description="Agent folder management", path="/api/agents/folders"
+)
+
+
+def _folder_error_response(message: str, err: Exception):
+    current_app.logger.error(f"{message}: {err}", exc_info=True)
+    return make_response(jsonify({"success": False, "message": message}), 400)
+
+
+@agents_folders_ns.route("/")
+class AgentFolders(Resource):
+    @api.doc(description="Get all folders for the user")
+    def get(self):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        try:
+            folders = list(agent_folders_collection.find({"user": user}))
+            result = [
+                {
+                    "id": str(f["_id"]),
+                    "name": f["name"],
+                    "parent_id": f.get("parent_id"),
+                    "created_at": f.get("created_at", "").isoformat() if f.get("created_at") else None,
+                    "updated_at": f.get("updated_at", "").isoformat() if f.get("updated_at") else None,
+                }
+                for f in folders
+            ]
+            return make_response(jsonify({"folders": result}), 200)
+        except Exception as err:
+            return _folder_error_response("Failed to fetch folders", err)
+
+    @api.doc(description="Create a new folder")
+    @api.expect(
+        api.model(
+            "CreateFolder",
+            {
+                "name": fields.String(required=True, description="Folder name"),
+                "parent_id": fields.String(required=False, description="Parent folder ID"),
+            },
+        )
+    )
+    def post(self):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        data = request.get_json()
+        if not data or not data.get("name"):
+            return make_response(jsonify({"success": False, "message": "Folder name is required"}), 400)
+
+        parent_id = data.get("parent_id")
+        if parent_id:
+            parent = agent_folders_collection.find_one({"_id": ObjectId(parent_id), "user": user})
+            if not parent:
+                return make_response(jsonify({"success": False, "message": "Parent folder not found"}), 404)
+
+        try:
+            now = datetime.datetime.now(datetime.timezone.utc)
+            folder = {
+                "user": user,
+                "name": data["name"],
+                "parent_id": parent_id,
+                "created_at": now,
+                "updated_at": now,
+            }
+            result = agent_folders_collection.insert_one(folder)
+            dual_write(
+                AgentFoldersRepository,
+                lambda repo, u=user, n=data["name"]: repo.create(u, n),
+            )
+            return make_response(
+                jsonify({"id": str(result.inserted_id), "name": data["name"], "parent_id": parent_id}),
+                201,
+            )
+        except Exception as err:
+            return _folder_error_response("Failed to create folder", err)
+
+
+@agents_folders_ns.route("/<string:folder_id>")
+class AgentFolder(Resource):
+    @api.doc(description="Get a specific folder with its agents")
+    def get(self, folder_id):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        try:
+            folder = agent_folders_collection.find_one({"_id": ObjectId(folder_id), "user": user})
+            if not folder:
+                return make_response(jsonify({"success": False, "message": "Folder not found"}), 404)
+            
+            agents = list(agents_collection.find({"user": user, "folder_id": folder_id}))
+            agents_list = [
+                {"id": str(a["_id"]), "name": a["name"], "description": a.get("description", "")}
+                for a in agents
+            ]
+            subfolders = list(agent_folders_collection.find({"user": user, "parent_id": folder_id}))
+            subfolders_list = [{"id": str(sf["_id"]), "name": sf["name"]} for sf in subfolders]
+
+            return make_response(
+                jsonify({
+                    "id": str(folder["_id"]),
+                    "name": folder["name"],
+                    "parent_id": folder.get("parent_id"),
+                    "agents": agents_list,
+                    "subfolders": subfolders_list,
+                }),
+                200,
+            )
+        except Exception as err:
+            return _folder_error_response("Failed to fetch folder", err)
+
+    @api.doc(description="Update a folder")
+    def put(self, folder_id):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        data = request.get_json()
+        if not data:
+            return make_response(jsonify({"success": False, "message": "No data provided"}), 400)
+
+        try:
+            update_fields = {"updated_at": datetime.datetime.now(datetime.timezone.utc)}
+            if "name" in data:
+                update_fields["name"] = data["name"]
+            if "parent_id" in data:
+                if data["parent_id"] == folder_id:
+                    return make_response(jsonify({"success": False, "message": "Cannot set folder as its own parent"}), 400)
+                update_fields["parent_id"] = data["parent_id"]
+
+            result = agent_folders_collection.update_one(
+                {"_id": ObjectId(folder_id), "user": user}, {"$set": update_fields}
+            )
+            if result.matched_count == 0:
+                return make_response(jsonify({"success": False, "message": "Folder not found"}), 404)
+            return make_response(jsonify({"success": True}), 200)
+        except Exception as err:
+            return _folder_error_response("Failed to update folder", err)
+
+    @api.doc(description="Delete a folder")
+    def delete(self, folder_id):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        try:
+            agents_collection.update_many(
+                {"user": user, "folder_id": folder_id}, {"$unset": {"folder_id": ""}}
+            )
+            agent_folders_collection.update_many(
+                {"user": user, "parent_id": folder_id}, {"$unset": {"parent_id": ""}}
+            )
+            result = agent_folders_collection.delete_one({"_id": ObjectId(folder_id), "user": user})
+            dual_write(
+                AgentFoldersRepository,
+                lambda repo, fid=folder_id, u=user: repo.delete(fid, u),
+            )
+            if result.deleted_count == 0:
+                return make_response(jsonify({"success": False, "message": "Folder not found"}), 404)
+            return make_response(jsonify({"success": True}), 200)
+        except Exception as err:
+            return _folder_error_response("Failed to delete folder", err)
+
+
+@agents_folders_ns.route("/move_agent")
+class MoveAgentToFolder(Resource):
+    @api.doc(description="Move an agent to a folder or remove from folder")
+    @api.expect(
+        api.model(
+            "MoveAgent",
+            {
+                "agent_id": fields.String(required=True, description="Agent ID to move"),
+                "folder_id": fields.String(required=False, description="Target folder ID (null to remove from folder)"),
+            },
+        )
+    )
+    def post(self):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        data = request.get_json()
+        if not data or not data.get("agent_id"):
+            return make_response(jsonify({"success": False, "message": "Agent ID is required"}), 400)
+
+        agent_id = data["agent_id"]
+        folder_id = data.get("folder_id")
+
+        try:
+            agent = agents_collection.find_one({"_id": ObjectId(agent_id), "user": user})
+            if not agent:
+                return make_response(jsonify({"success": False, "message": "Agent not found"}), 404)
+
+            if folder_id:
+                folder = agent_folders_collection.find_one({"_id": ObjectId(folder_id), "user": user})
+                if not folder:
+                    return make_response(jsonify({"success": False, "message": "Folder not found"}), 404)
+                agents_collection.update_one(
+                    {"_id": ObjectId(agent_id)}, {"$set": {"folder_id": folder_id}}
+                )
+            else:
+                agents_collection.update_one(
+                    {"_id": ObjectId(agent_id)}, {"$unset": {"folder_id": ""}}
+                )
+
+            return make_response(jsonify({"success": True}), 200)
+        except Exception as err:
+            return _folder_error_response("Failed to move agent", err)
+
+
+@agents_folders_ns.route("/bulk_move")
+class BulkMoveAgents(Resource):
+    @api.doc(description="Move multiple agents to a folder")
+    @api.expect(
+        api.model(
+            "BulkMoveAgents",
+            {
+                "agent_ids": fields.List(fields.String, required=True, description="List of agent IDs"),
+                "folder_id": fields.String(required=False, description="Target folder ID"),
+            },
+        )
+    )
+    def post(self):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        data = request.get_json()
+        if not data or not data.get("agent_ids"):
+            return make_response(jsonify({"success": False, "message": "Agent IDs are required"}), 400)
+
+        agent_ids = data["agent_ids"]
+        folder_id = data.get("folder_id")
+
+        try:
+            if folder_id:
+                folder = agent_folders_collection.find_one({"_id": ObjectId(folder_id), "user": user})
+                if not folder:
+                    return make_response(jsonify({"success": False, "message": "Folder not found"}), 404)
+
+            object_ids = [ObjectId(aid) for aid in agent_ids]
+            if folder_id:
+                agents_collection.update_many(
+                    {"_id": {"$in": object_ids}, "user": user},
+                    {"$set": {"folder_id": folder_id}},
+                )
+            else:
+                agents_collection.update_many(
+                    {"_id": {"$in": object_ids}, "user": user},
+                    {"$unset": {"folder_id": ""}},
+                )
+            return make_response(jsonify({"success": True}), 200)
+        except Exception as err:
+            return _folder_error_response("Failed to move agents", err)

application/api/user/agents/routes.py

@@ -11,6 +11,7 @@ from flask_restx import fields, Namespace, Resource
 
 from application.api import api
 from application.api.user.base import (
+    agent_folders_collection,
     agents_collection,
     db,
     ensure_user_doc,
@@ -18,6 +19,16 @@ from application.api.user.base import (
     resolve_tool_details,
     storage,
     users_collection,
+    workflow_edges_collection,
+    workflow_nodes_collection,
+    workflows_collection,
+)
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.agents import AgentsRepository
+from application.storage.db.repositories.users import UsersRepository
+from application.core.json_schema_utils import (
+    JsonSchemaValidationError,
+    normalize_json_schema_payload,
 )
 from application.core.settings import settings
 from application.utils import (
@@ -30,6 +41,228 @@ from application.utils import (
 agents_ns = Namespace("agents", description="Agent management operations", path="/api")
 
 
+AGENT_TYPE_SCHEMAS = {
+    "classic": {
+        "required_published": [
+            "name",
+            "description",
+            "chunks",
+            "retriever",
+            "prompt_id",
+        ],
+        "required_draft": ["name"],
+        "validate_published": ["name", "description", "prompt_id"],
+        "validate_draft": [],
+        "require_source": True,
+        "fields": [
+            "user",
+            "name",
+            "description",
+            "agent_type",
+            "status",
+            "key",
+            "image",
+            "source",
+            "sources",
+            "chunks",
+            "retriever",
+            "prompt_id",
+            "tools",
+            "json_schema",
+            "models",
+            "default_model_id",
+            "folder_id",
+            "limited_token_mode",
+            "token_limit",
+            "limited_request_mode",
+            "request_limit",
+            "allow_system_prompt_override",
+            "createdAt",
+            "updatedAt",
+            "lastUsedAt",
+        ],
+    },
+    "workflow": {
+        "required_published": ["name", "workflow"],
+        "required_draft": ["name"],
+        "validate_published": ["name", "workflow"],
+        "validate_draft": [],
+        "fields": [
+            "user",
+            "name",
+            "description",
+            "agent_type",
+            "status",
+            "key",
+            "workflow",
+            "folder_id",
+            "limited_token_mode",
+            "token_limit",
+            "limited_request_mode",
+            "request_limit",
+            "allow_system_prompt_override",
+            "createdAt",
+            "updatedAt",
+            "lastUsedAt",
+        ],
+    },
+}
+
+AGENT_TYPE_SCHEMAS["react"] = AGENT_TYPE_SCHEMAS["classic"]
+AGENT_TYPE_SCHEMAS["agentic"] = AGENT_TYPE_SCHEMAS["classic"]
+AGENT_TYPE_SCHEMAS["research"] = AGENT_TYPE_SCHEMAS["classic"]
+AGENT_TYPE_SCHEMAS["openai"] = AGENT_TYPE_SCHEMAS["classic"]
+
+
+def _build_pg_agent_fields(fields: dict) -> dict:
+    """Translate Mongo-shaped agent fields into the Postgres mirror subset."""
+    allowed = {
+        "name",
+        "description",
+        "agent_type",
+        "status",
+        "key",
+        "chunks",
+        "retriever",
+        "tools",
+        "json_schema",
+        "models",
+        "default_model_id",
+        "limited_token_mode",
+        "token_limit",
+        "limited_request_mode",
+        "request_limit",
+        "incoming_webhook_token",
+        "lastUsedAt",
+    }
+    translated: dict = {}
+    for key, value in fields.items():
+        if key not in allowed:
+            continue
+        translated["last_used_at" if key == "lastUsedAt" else key] = value
+    return translated
+
+
+def normalize_workflow_reference(workflow_value):
+    """Normalize workflow references from form/json payloads."""
+    if workflow_value is None:
+        return None
+    if isinstance(workflow_value, dict):
+        return (
+            workflow_value.get("id")
+            or workflow_value.get("_id")
+            or workflow_value.get("workflow_id")
+        )
+    if isinstance(workflow_value, str):
+        value = workflow_value.strip()
+        if not value:
+            return ""
+        try:
+            parsed = json.loads(value)
+            if isinstance(parsed, str):
+                return parsed.strip()
+            if isinstance(parsed, dict):
+                return (
+                    parsed.get("id") or parsed.get("_id") or parsed.get("workflow_id")
+                )
+        except json.JSONDecodeError:
+            pass
+        return value
+    return str(workflow_value)
+
+
+def validate_workflow_access(workflow_value, user, required=False):
+    """Validate workflow reference and ensure ownership."""
+    workflow_id = normalize_workflow_reference(workflow_value)
+    if not workflow_id:
+        if required:
+            return None, make_response(
+                jsonify({"success": False, "message": "Workflow is required"}), 400
+            )
+        return None, None
+    if not ObjectId.is_valid(workflow_id):
+        return None, make_response(
+            jsonify({"success": False, "message": "Invalid workflow ID format"}), 400
+        )
+    workflow = workflows_collection.find_one({"_id": ObjectId(workflow_id), "user": user})
+    if not workflow:
+        return None, make_response(
+            jsonify({"success": False, "message": "Workflow not found"}), 404
+        )
+    return workflow_id, None
+
+
+def build_agent_document(
+    data, user, key, agent_type, image_url=None, source_field=None, sources_list=None
+):
+    """Build agent document based on agent type schema."""
+
+    if not agent_type or agent_type not in AGENT_TYPE_SCHEMAS:
+        agent_type = "classic"
+    schema = AGENT_TYPE_SCHEMAS.get(agent_type, AGENT_TYPE_SCHEMAS["classic"])
+    allowed_fields = set(schema["fields"])
+
+    now = datetime.datetime.now(datetime.timezone.utc)
+    base_doc = {
+        "user": user,
+        "name": data.get("name"),
+        "description": data.get("description", ""),
+        "agent_type": agent_type,
+        "status": data.get("status"),
+        "key": key,
+        "createdAt": now,
+        "updatedAt": now,
+        "lastUsedAt": None,
+    }
+
+    if agent_type == "workflow":
+        base_doc["workflow"] = data.get("workflow")
+        base_doc["folder_id"] = data.get("folder_id")
+    else:
+        base_doc.update(
+            {
+                "image": image_url or "",
+                "source": source_field or "",
+                "sources": sources_list or [],
+                "chunks": data.get("chunks", ""),
+                "retriever": data.get("retriever", ""),
+                "prompt_id": data.get("prompt_id", ""),
+                "tools": data.get("tools", []),
+                "json_schema": data.get("json_schema"),
+                "models": data.get("models", []),
+                "default_model_id": data.get("default_model_id", ""),
+                "folder_id": data.get("folder_id"),
+            }
+        )
+    if "limited_token_mode" in allowed_fields:
+        base_doc["limited_token_mode"] = (
+            data.get("limited_token_mode") == "True"
+            if isinstance(data.get("limited_token_mode"), str)
+            else bool(data.get("limited_token_mode", False))
+        )
+    if "token_limit" in allowed_fields:
+        base_doc["token_limit"] = int(
+            data.get("token_limit", settings.DEFAULT_AGENT_LIMITS["token_limit"])
+        )
+    if "limited_request_mode" in allowed_fields:
+        base_doc["limited_request_mode"] = (
+            data.get("limited_request_mode") == "True"
+            if isinstance(data.get("limited_request_mode"), str)
+            else bool(data.get("limited_request_mode", False))
+        )
+    if "request_limit" in allowed_fields:
+        base_doc["request_limit"] = int(
+            data.get("request_limit", settings.DEFAULT_AGENT_LIMITS["request_limit"])
+        )
+    if "allow_system_prompt_override" in allowed_fields:
+        base_doc["allow_system_prompt_override"] = (
+            data.get("allow_system_prompt_override") == "True"
+            if isinstance(data.get("allow_system_prompt_override"), str)
+            else bool(data.get("allow_system_prompt_override", False))
+        )
+    return {k: v for k, v in base_doc.items() if k in allowed_fields}
+
+
 @agents_ns.route("/get_agent")
 class GetAgent(Resource):
     @api.doc(params={"id": "Agent ID"}, description="Get agent by ID")
@@ -67,7 +300,7 @@ class GetAgent(Resource):
                     if (isinstance(source_ref, DBRef) and db.dereference(source_ref))
                     or source_ref == "default"
                 ],
-                "chunks": agent["chunks"],
+                "chunks": agent.get("chunks", "2"),
                 "retriever": agent.get("retriever", ""),
                 "prompt_id": agent.get("prompt_id", ""),
                 "tools": agent.get("tools", []),
@@ -97,6 +330,11 @@ class GetAgent(Resource):
                 "shared_token": agent.get("shared_token", ""),
                 "models": agent.get("models", []),
                 "default_model_id": agent.get("default_model_id", ""),
+                "folder_id": agent.get("folder_id"),
+                "workflow": agent.get("workflow"),
+                "allow_system_prompt_override": agent.get(
+                    "allow_system_prompt_override", False
+                ),
             }
             return make_response(jsonify(data), 200)
         except Exception as e:
@@ -146,7 +384,7 @@ class GetAgents(Resource):
                             isinstance(source_ref, DBRef) and db.dereference(source_ref)
                         )
                     ],
-                    "chunks": agent["chunks"],
+                    "chunks": agent.get("chunks", "2"),
                     "retriever": agent.get("retriever", ""),
                     "prompt_id": agent.get("prompt_id", ""),
                     "tools": agent.get("tools", []),
@@ -176,9 +414,16 @@ class GetAgents(Resource):
                     "shared_token": agent.get("shared_token", ""),
                     "models": agent.get("models", []),
                     "default_model_id": agent.get("default_model_id", ""),
+                    "folder_id": agent.get("folder_id"),
+                    "workflow": agent.get("workflow"),
+                    "allow_system_prompt_override": agent.get(
+                        "allow_system_prompt_override", False
+                    ),
                 }
                 for agent in agents
-                if "source" in agent or "retriever" in agent
+                if "source" in agent
+                or "retriever" in agent
+                or agent.get("agent_type") == "workflow"
             ]
         except Exception as err:
             current_app.logger.error(f"Error retrieving agents: {err}", exc_info=True)
@@ -206,16 +451,22 @@ class CreateAgent(Resource):
                 required=False,
                 description="List of source identifiers for multiple sources",
             ),
-            "chunks": fields.Integer(required=True, description="Chunks count"),
-            "retriever": fields.String(required=True, description="Retriever ID"),
-            "prompt_id": fields.String(required=True, description="Prompt ID"),
+            "chunks": fields.Integer(required=False, description="Chunks count"),
+            "retriever": fields.String(required=False, description="Retriever ID"),
+            "prompt_id": fields.String(required=False, description="Prompt ID"),
             "tools": fields.List(
                 fields.String, required=False, description="List of tool identifiers"
             ),
-            "agent_type": fields.String(required=True, description="Type of the agent"),
+            "agent_type": fields.String(
+                required=False,
+                description="Type of the agent (classic, react, workflow). Defaults to 'classic' for backwards compatibility.",
+            ),
             "status": fields.String(
                 required=True, description="Status of the agent (draft or published)"
             ),
+            "workflow": fields.String(
+                required=False, description="Workflow ID for workflow-type agents"
+            ),
             "json_schema": fields.Raw(
                 required=False,
                 description="JSON schema for enforcing structured output format",
@@ -242,6 +493,13 @@ class CreateAgent(Resource):
             "default_model_id": fields.String(
                 required=False, description="Default model ID for this agent"
             ),
+            "folder_id": fields.String(
+                required=False, description="Folder ID to organize the agent"
+            ),
+            "allow_system_prompt_override": fields.Boolean(
+                required=False,
+                description="Allow API callers to override the system prompt via the v1 endpoint",
+            ),
         },
     )
 
@@ -277,40 +535,15 @@ class CreateAgent(Resource):
                     data["models"] = []
         print(f"Received data: {data}")
 
-        # Validate JSON schema if provided
-
-        if data.get("json_schema"):
+        # Validate and normalize JSON schema if provided
+        if "json_schema" in data:
             try:
-                # Basic validation - ensure it's a valid JSON structure
-
-                json_schema = data.get("json_schema")
-                if not isinstance(json_schema, dict):
-                    return make_response(
-                        jsonify(
-                            {
-                                "success": False,
-                                "message": "JSON schema must be a valid JSON object",
-                            }
-                        ),
-                        400,
-                    )
-                # Validate that it has either a 'schema' property or is itself a schema
-
-                if "schema" not in json_schema and "type" not in json_schema:
-                    return make_response(
-                        jsonify(
-                            {
-                                "success": False,
-                                "message": "JSON schema must contain either a 'schema' property or be a valid JSON schema with 'type' property",
-                            }
-                        ),
-                        400,
-                    )
-            except Exception as e:
+                data["json_schema"] = normalize_json_schema_payload(
+                    data.get("json_schema")
+                )
+            except JsonSchemaValidationError:
                 return make_response(
-                    jsonify(
-                        {"success": False, "message": f"Invalid JSON schema: {str(e)}"}
-                    ),
+                    jsonify({"success": False, "message": "Invalid JSON schema"}),
                     400,
                 )
         if data.get("status") not in ["draft", "published"]:
@@ -323,18 +556,34 @@ class CreateAgent(Resource):
                 ),
                 400,
             )
-        if data.get("status") == "published":
-            required_fields = [
-                "name",
-                "description",
-                "chunks",
-                "retriever",
-                "prompt_id",
-                "agent_type",
-            ]
-            # Require either source or sources (but not both)
+        agent_type = data.get("agent_type", "")
+        # Default to classic schema for empty or unknown agent types
 
-            if not data.get("source") and not data.get("sources"):
+        if not agent_type or agent_type not in AGENT_TYPE_SCHEMAS:
+            schema = AGENT_TYPE_SCHEMAS["classic"]
+            # Set agent_type to classic if it was empty
+
+            if not agent_type:
+                agent_type = "classic"
+        else:
+            schema = AGENT_TYPE_SCHEMAS[agent_type]
+        is_published = data.get("status") == "published"
+        if agent_type == "workflow":
+            workflow_id, workflow_error = validate_workflow_access(
+                data.get("workflow"), user, required=is_published
+            )
+            if workflow_error:
+                return workflow_error
+            data["workflow"] = workflow_id
+        if data.get("status") == "published":
+            required_fields = schema["required_published"]
+            validate_fields = schema["validate_published"]
+
+            if (
+                schema.get("require_source")
+                and not data.get("source")
+                and not data.get("sources")
+            ):
                 return make_response(
                     jsonify(
                         {
@@ -344,10 +593,9 @@ class CreateAgent(Resource):
                     ),
                     400,
                 )
-            validate_fields = ["name", "description", "prompt_id", "agent_type"]
         else:
-            required_fields = ["name"]
-            validate_fields = []
+            required_fields = schema["required_draft"]
+            validate_fields = schema["validate_draft"]
         missing_fields = check_required_fields(data, required_fields)
         invalid_fields = validate_required_fields(data, validate_fields)
         if missing_fields:
@@ -359,76 +607,64 @@ class CreateAgent(Resource):
             return make_response(
                 jsonify({"success": False, "message": "Image upload failed"}), 400
             )
+        folder_id = data.get("folder_id")
+        if folder_id:
+            if not ObjectId.is_valid(folder_id):
+                return make_response(
+                    jsonify({"success": False, "message": "Invalid folder ID format"}),
+                    400,
+                )
+            folder = agent_folders_collection.find_one(
+                {"_id": ObjectId(folder_id), "user": user}
+            )
+            if not folder:
+                return make_response(
+                    jsonify({"success": False, "message": "Folder not found"}), 404
+                )
         try:
             key = str(uuid.uuid4()) if data.get("status") == "published" else ""
 
             sources_list = []
+            source_field = ""
             if data.get("sources") and len(data.get("sources", [])) > 0:
                 for source_id in data.get("sources", []):
                     if source_id == "default":
                         sources_list.append("default")
                     elif ObjectId.is_valid(source_id):
                         sources_list.append(DBRef("sources", ObjectId(source_id)))
-                source_field = ""
             else:
                 source_value = data.get("source", "")
                 if source_value == "default":
                     source_field = "default"
                 elif ObjectId.is_valid(source_value):
                     source_field = DBRef("sources", ObjectId(source_value))
-                else:
-                    source_field = ""
-            new_agent = {
-                "user": user,
-                "name": data.get("name"),
-                "description": data.get("description", ""),
-                "image": image_url,
-                "source": source_field,
-                "sources": sources_list,
-                "chunks": data.get("chunks", ""),
-                "retriever": data.get("retriever", ""),
-                "prompt_id": data.get("prompt_id", ""),
-                "tools": data.get("tools", []),
-                "agent_type": data.get("agent_type", ""),
-                "status": data.get("status"),
-                "json_schema": data.get("json_schema"),
-                "limited_token_mode": (
-                    data.get("limited_token_mode") == "True"
-                    if isinstance(data.get("limited_token_mode"), str)
-                    else bool(data.get("limited_token_mode", False))
-                ),
-                "token_limit": int(
-                    data.get(
-                        "token_limit", settings.DEFAULT_AGENT_LIMITS["token_limit"]
-                    )
-                ),
-                "limited_request_mode": (
-                    data.get("limited_request_mode") == "True"
-                    if isinstance(data.get("limited_request_mode"), str)
-                    else bool(data.get("limited_request_mode", False))
-                ),
-                "request_limit": int(
-                    data.get(
-                        "request_limit", settings.DEFAULT_AGENT_LIMITS["request_limit"]
-                    )
-                ),
-                "createdAt": datetime.datetime.now(datetime.timezone.utc),
-                "updatedAt": datetime.datetime.now(datetime.timezone.utc),
-                "lastUsedAt": None,
-                "key": key,
-                "models": data.get("models", []),
-                "default_model_id": data.get("default_model_id", ""),
-            }
-            if new_agent["chunks"] == "":
-                new_agent["chunks"] = "2"
-            if (
-                new_agent["source"] == ""
-                and new_agent["retriever"] == ""
-                and not new_agent["sources"]
-            ):
-                new_agent["retriever"] = "classic"
+            new_agent = build_agent_document(
+                data, user, key, agent_type, image_url, source_field, sources_list
+            )
+
+            if agent_type != "workflow":
+                if new_agent.get("chunks") == "":
+                    new_agent["chunks"] = "2"
+                if (
+                    new_agent.get("source") == ""
+                    and new_agent.get("retriever") == ""
+                    and not new_agent.get("sources")
+                ):
+                    new_agent["retriever"] = "classic"
             resp = agents_collection.insert_one(new_agent)
             new_id = str(resp.inserted_id)
+            dual_write(
+                AgentsRepository,
+                lambda repo, u=user, a=new_agent, mid=new_id: repo.create(
+                    u, a.get("name", ""), a.get("status", "draft"),
+                    key=a.get("key"), description=a.get("description"),
+                    retriever=a.get("retriever"), chunks=a.get("chunks"),
+                    tools=a.get("tools"), models=a.get("models"),
+                    shared=a.get("shared", False),
+                    incoming_webhook_token=a.get("incoming_webhook_token"),
+                    legacy_mongo_id=mid,
+                ),
+            )
         except Exception as err:
             current_app.logger.error(f"Error creating agent: {err}", exc_info=True)
             return make_response(jsonify({"success": False}), 400)
@@ -455,16 +691,22 @@ class UpdateAgent(Resource):
                 required=False,
                 description="List of source identifiers for multiple sources",
             ),
-            "chunks": fields.Integer(required=True, description="Chunks count"),
-            "retriever": fields.String(required=True, description="Retriever ID"),
-            "prompt_id": fields.String(required=True, description="Prompt ID"),
+            "chunks": fields.Integer(required=False, description="Chunks count"),
+            "retriever": fields.String(required=False, description="Retriever ID"),
+            "prompt_id": fields.String(required=False, description="Prompt ID"),
             "tools": fields.List(
                 fields.String, required=False, description="List of tool identifiers"
             ),
-            "agent_type": fields.String(required=True, description="Type of the agent"),
+            "agent_type": fields.String(
+                required=False,
+                description="Type of the agent (classic, react, workflow). Defaults to 'classic' for backwards compatibility.",
+            ),
             "status": fields.String(
                 required=True, description="Status of the agent (draft or published)"
             ),
+            "workflow": fields.String(
+                required=False, description="Workflow ID for workflow-type agents"
+            ),
             "json_schema": fields.Raw(
                 required=False,
                 description="JSON schema for enforcing structured output format",
@@ -491,6 +733,13 @@ class UpdateAgent(Resource):
             "default_model_id": fields.String(
                 required=False, description="Default model ID for this agent"
             ),
+            "folder_id": fields.String(
+                required=False, description="Folder ID to organize the agent"
+            ),
+            "allow_system_prompt_override": fields.Boolean(
+                required=False,
+                description="Allow API callers to override the system prompt via the v1 endpoint",
+            ),
         },
     )
 
@@ -529,6 +778,8 @@ class UpdateAgent(Resource):
                                 ),
                                 400,
                             )
+                if data.get("json_schema") == "":
+                    data["json_schema"] = None
         except Exception as err:
             current_app.logger.error(
                 f"Error parsing request data: {err}", exc_info=True
@@ -557,13 +808,7 @@ class UpdateAgent(Resource):
             request, existing_agent.get("image", ""), user, storage
         )
         if error:
-            current_app.logger.error(
-                f"Image upload error for agent {agent_id}: {error}"
-            )
-            return make_response(
-                jsonify({"success": False, "message": f"Image upload failed: {error}"}),
-                400,
-            )
+            return error
         update_fields = {}
         allowed_fields = [
             "name",
@@ -584,6 +829,9 @@ class UpdateAgent(Resource):
             "request_limit",
             "models",
             "default_model_id",
+            "folder_id",
+            "workflow",
+            "allow_system_prompt_override",
         ]
 
         for field in allowed_fields:
@@ -687,17 +935,15 @@ class UpdateAgent(Resource):
             elif field == "json_schema":
                 json_schema = data.get("json_schema")
                 if json_schema is not None:
-                    if not isinstance(json_schema, dict):
+                    try:
+                        update_fields[field] = normalize_json_schema_payload(
+                            json_schema
+                        )
+                    except JsonSchemaValidationError:
                         return make_response(
-                            jsonify(
-                                {
-                                    "success": False,
-                                    "message": "JSON schema must be a valid object",
-                                }
-                            ),
+                            jsonify({"success": False, "message": "Invalid JSON schema"}),
                             400,
                         )
-                    update_fields[field] = json_schema
                 else:
                     update_fields[field] = None
             elif field == "limited_token_mode":
@@ -740,10 +986,10 @@ class UpdateAgent(Resource):
                     )
             elif field == "token_limit":
                 token_limit = data.get("token_limit")
-                # Convert to int and store
                 update_fields[field] = int(token_limit) if token_limit else 0
 
                 # Validate consistency with mode
+
                 if update_fields[field] > 0 and not data.get("limited_token_mode"):
                     return make_response(
                         jsonify(
@@ -768,6 +1014,49 @@ class UpdateAgent(Resource):
                         ),
                         400,
                     )
+            elif field == "folder_id":
+                folder_id = data.get("folder_id")
+                if folder_id:
+                    if not ObjectId.is_valid(folder_id):
+                        return make_response(
+                            jsonify(
+                                {
+                                    "success": False,
+                                    "message": "Invalid folder ID format",
+                                }
+                            ),
+                            400,
+                        )
+                    folder = agent_folders_collection.find_one(
+                        {"_id": ObjectId(folder_id), "user": user}
+                    )
+                    if not folder:
+                        return make_response(
+                            jsonify({"success": False, "message": "Folder not found"}),
+                            404,
+                        )
+                    update_fields[field] = folder_id
+                else:
+                    update_fields[field] = None
+            elif field == "workflow":
+                workflow_required = (
+                    data.get("status", existing_agent.get("status")) == "published"
+                    and data.get("agent_type", existing_agent.get("agent_type"))
+                    == "workflow"
+                )
+                workflow_id, workflow_error = validate_workflow_access(
+                    data.get("workflow"), user, required=workflow_required
+                )
+                if workflow_error:
+                    return workflow_error
+                update_fields[field] = workflow_id
+            elif field == "allow_system_prompt_override":
+                raw_value = data.get("allow_system_prompt_override", False)
+                update_fields[field] = (
+                    raw_value == "True"
+                    if isinstance(raw_value, str)
+                    else bool(raw_value)
+                )
             else:
                 value = data[field]
                 if field in ["name", "description", "prompt_id", "agent_type"]:
@@ -796,46 +1085,82 @@ class UpdateAgent(Resource):
             )
         newly_generated_key = None
         final_status = update_fields.get("status", existing_agent.get("status"))
+        agent_type = update_fields.get("agent_type", existing_agent.get("agent_type"))
 
         if final_status == "published":
-            required_published_fields = {
-                "name": "Agent name",
-                "description": "Agent description",
-                "chunks": "Chunks count",
-                "prompt_id": "Prompt",
-                "agent_type": "Agent type",
-            }
+            if agent_type == "workflow":
+                required_published_fields = {
+                    "name": "Agent name",
+                }
+                missing_published_fields = []
+                for req_field, field_label in required_published_fields.items():
+                    final_value = update_fields.get(
+                        req_field, existing_agent.get(req_field)
+                    )
+                    if not final_value:
+                        missing_published_fields.append(field_label)
 
-            missing_published_fields = []
-            for req_field, field_label in required_published_fields.items():
-                final_value = update_fields.get(
-                    req_field, existing_agent.get(req_field)
+                workflow_id = update_fields.get("workflow", existing_agent.get("workflow"))
+                if not workflow_id:
+                    missing_published_fields.append("Workflow")
+                elif not ObjectId.is_valid(workflow_id):
+                    missing_published_fields.append("Valid workflow")
+                else:
+                    workflow = workflows_collection.find_one(
+                        {"_id": ObjectId(workflow_id), "user": user}
+                    )
+                    if not workflow:
+                        missing_published_fields.append("Workflow access")
+
+                if missing_published_fields:
+                    return make_response(
+                        jsonify(
+                            {
+                                "success": False,
+                                "message": f"Cannot publish workflow agent. Missing required fields: {', '.join(missing_published_fields)}",
+                            }
+                        ),
+                        400,
+                    )
+            else:
+                required_published_fields = {
+                    "name": "Agent name",
+                    "description": "Agent description",
+                    "chunks": "Chunks count",
+                    "prompt_id": "Prompt",
+                    "agent_type": "Agent type",
+                }
+
+                missing_published_fields = []
+                for req_field, field_label in required_published_fields.items():
+                    final_value = update_fields.get(
+                        req_field, existing_agent.get(req_field)
+                    )
+                    if not final_value:
+                        missing_published_fields.append(field_label)
+                source_val = update_fields.get("source", existing_agent.get("source"))
+                sources_val = update_fields.get(
+                    "sources", existing_agent.get("sources", [])
                 )
-                if not final_value:
-                    missing_published_fields.append(field_label)
-            source_val = update_fields.get("source", existing_agent.get("source"))
-            sources_val = update_fields.get(
-                "sources", existing_agent.get("sources", [])
-            )
 
-            has_valid_source = (
-                isinstance(source_val, DBRef)
-                or source_val == "default"
-                or (isinstance(sources_val, list) and len(sources_val) > 0)
-            )
-
-            if not has_valid_source:
-                missing_published_fields.append("Source")
-            if missing_published_fields:
-                return make_response(
-                    jsonify(
-                        {
-                            "success": False,
-                            "message": f"Cannot publish agent. Missing or invalid required fields: {', '.join(missing_published_fields)}",
-                        }
-                    ),
-                    400,
+                has_valid_source = (
+                    isinstance(source_val, DBRef)
+                    or source_val == "default"
+                    or (isinstance(sources_val, list) and len(sources_val) > 0)
                 )
+
+                if not has_valid_source:
+                    missing_published_fields.append("Source")
+                if missing_published_fields:
+                    return make_response(
+                        jsonify(
+                            {
+                                "success": False,
+                                "message": f"Cannot publish agent. Missing or invalid required fields: {', '.join(missing_published_fields)}",
+                            }
+                        ),
+                        400,
+                    )
             if not existing_agent.get("key"):
                 newly_generated_key = str(uuid.uuid4())
                 update_fields["key"] = newly_generated_key
@@ -875,6 +1200,14 @@ class UpdateAgent(Resource):
                 jsonify({"success": False, "message": "Database error during update"}),
                 500,
             )
+        pg_update_fields = _build_pg_agent_fields(update_fields)
+        if pg_update_fields:
+            dual_write(
+                AgentsRepository,
+                lambda repo, aid=agent_id, u=user, fields=pg_update_fields: repo.update_by_legacy_id(
+                    aid, u, fields,
+                ),
+            )
         response_data = {
             "success": True,
             "id": agent_id,
@@ -902,11 +1235,38 @@ class DeleteAgent(Resource):
             deleted_agent = agents_collection.find_one_and_delete(
                 {"_id": ObjectId(agent_id), "user": user}
             )
+            dual_write(
+                AgentsRepository,
+                lambda repo, aid=agent_id, u=user: repo.delete_by_legacy_id(aid, u),
+            )
             if not deleted_agent:
                 return make_response(
                     jsonify({"success": False, "message": "Agent not found"}), 404
                 )
             deleted_id = str(deleted_agent["_id"])
+
+            if deleted_agent.get("agent_type") == "workflow" and deleted_agent.get(
+                "workflow"
+            ):
+                workflow_id = normalize_workflow_reference(deleted_agent.get("workflow"))
+                if workflow_id and ObjectId.is_valid(workflow_id):
+                    workflow_oid = ObjectId(workflow_id)
+                    owned_workflow = workflows_collection.find_one(
+                        {"_id": workflow_oid, "user": user}, {"_id": 1}
+                    )
+                    if owned_workflow:
+                        workflow_nodes_collection.delete_many({"workflow_id": workflow_id})
+                        workflow_edges_collection.delete_many({"workflow_id": workflow_id})
+                        workflows_collection.delete_one({"_id": workflow_oid, "user": user})
+                    else:
+                        current_app.logger.warning(
+                            f"Skipping workflow cleanup for non-owned workflow {workflow_id}"
+                        )
+                elif workflow_id:
+                    current_app.logger.warning(
+                        f"Skipping workflow cleanup for invalid workflow id {workflow_id}"
+                    )
+
         except Exception as err:
             current_app.logger.error(f"Error deleting agent: {err}", exc_info=True)
             return make_response(jsonify({"success": False}), 400)
@@ -946,6 +1306,9 @@ class PinnedAgents(Resource):
                     {"user_id": user_id},
                     {"$pullAll": {"agent_preferences.pinned": stale_ids}},
                 )
+                dual_write(UsersRepository,
+                    lambda repo, uid=user_id, ids=stale_ids: repo.remove_pinned_bulk(uid, ids)
+                )
             list_pinned_agents = [
                 {
                     "id": str(agent["_id"]),
@@ -1015,19 +1378,16 @@ class AdoptAgent(Resource):
     def post(self):
         if not (decoded_token := request.decoded_token):
             return make_response(jsonify({"success": False}), 401)
-
         if not (agent_id := request.args.get("id")):
             return make_response(
                 jsonify({"success": False, "message": "ID required"}), 400
             )
-
         try:
             agent = agents_collection.find_one(
                 {"_id": ObjectId(agent_id), "user": "system"}
             )
             if not agent:
                 return make_response(jsonify({"status": "Not found"}), 404)
-
             new_agent = agent.copy()
             new_agent.pop("_id", None)
             new_agent["user"] = decoded_token["sub"]
@@ -1080,12 +1440,18 @@ class PinAgent(Resource):
                     {"user_id": user_id},
                     {"$pull": {"agent_preferences.pinned": agent_id}},
                 )
+                dual_write(UsersRepository,
+                    lambda repo, uid=user_id, aid=agent_id: repo.remove_pinned(uid, aid)
+                )
                 action = "unpinned"
             else:
                 users_collection.update_one(
                     {"user_id": user_id},
                     {"$addToSet": {"agent_preferences.pinned": agent_id}},
                 )
+                dual_write(UsersRepository,
+                    lambda repo, uid=user_id, aid=agent_id: repo.add_pinned(uid, aid)
+                )
                 action = "pinned"
         except Exception as err:
             current_app.logger.error(f"Error pinning/unpinning agent: {err}")
@@ -1131,6 +1497,9 @@ class RemoveSharedAgent(Resource):
                     }
                 },
             )
+            dual_write(UsersRepository,
+                lambda repo, uid=user_id, aid=agent_id: repo.remove_agent_from_all(uid, aid)
+            )
 
             return make_response(jsonify({"success": True, "action": "removed"}), 200)
         except Exception as err:

application/api/user/agents/sharing.py

@@ -18,6 +18,8 @@ from application.api.user.base import (
     user_tools_collection,
     users_collection,
 )
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.users import UsersRepository
 from application.utils import generate_image_url
 
 agents_sharing_ns = Namespace(
@@ -105,6 +107,9 @@ class SharedAgent(Resource):
                         {"user_id": user_id},
                         {"$addToSet": {"agent_preferences.shared_with_me": agent_id}},
                     )
+                    dual_write(UsersRepository,
+                        lambda repo, uid=user_id, aid=agent_id: repo.add_shared(uid, aid)
+                    )
             return make_response(jsonify(data), 200)
         except Exception as err:
             current_app.logger.error(f"Error retrieving shared agent: {err}")
@@ -139,6 +144,9 @@ class SharedAgents(Resource):
                     {"user_id": user_id},
                     {"$pullAll": {"agent_preferences.shared_with_me": stale_ids}},
                 )
+                dual_write(UsersRepository,
+                    lambda repo, uid=user_id, ids=stale_ids: repo.remove_shared_bulk(uid, ids)
+                )
             pinned_ids = set(user_doc.get("agent_preferences", {}).get("pinned", []))
 
             list_shared_agents = [
@@ -255,8 +263,8 @@ class ShareAgent(Resource):
                     {"$unset": {"shared_metadata": ""}},
                 )
         except Exception as err:
-            current_app.logger.error(f"Error sharing/unsharing agent: {err}")
-            return make_response(jsonify({"success": False, "error": str(err)}), 400)
+            current_app.logger.error(f"Error sharing/unsharing agent: {err}", exc_info=True)
+            return make_response(jsonify({"success": False, "error": "Failed to update agent sharing status"}), 400)
         shared_token = shared_token if shared else None
         return make_response(
             jsonify({"success": True, "shared_token": shared_token}), 200

application/api/user/attachments/routes.py

@@ -1,15 +1,36 @@
 """File attachments and media routes."""
 
 import os
+import tempfile
+from pathlib import Path
 
 from bson.objectid import ObjectId
 from flask import current_app, jsonify, make_response, request
 from flask_restx import fields, Namespace, Resource
 
 from application.api import api
-from application.api.user.base import agents_collection, storage
-from application.api.user.tasks import store_attachment
+from application.cache import get_redis_instance
 from application.core.settings import settings
+from application.stt.constants import (
+    SUPPORTED_AUDIO_EXTENSIONS,
+    SUPPORTED_AUDIO_MIME_TYPES,
+)
+from application.stt.upload_limits import (
+    AudioFileTooLargeError,
+    build_stt_file_size_limit_message,
+    enforce_audio_file_size_limit,
+    is_audio_filename,
+)
+from application.stt.live_session import (
+    apply_live_stt_hypothesis,
+    create_live_stt_session,
+    delete_live_stt_session,
+    finalize_live_stt_session,
+    get_live_stt_transcript_text,
+    load_live_stt_session,
+    save_live_stt_session,
+)
+from application.stt.stt_creator import STTCreator
 from application.tts.tts_creator import TTSCreator
 from application.utils import safe_filename
 
@@ -19,6 +40,74 @@ attachments_ns = Namespace(
 )
 
 
+def _resolve_authenticated_user():
+    decoded_token = getattr(request, "decoded_token", None)
+    api_key = request.form.get("api_key") or request.args.get("api_key")
+
+    if decoded_token:
+        return safe_filename(decoded_token.get("sub"))
+
+    if api_key:
+        from application.api.user.base import agents_collection
+
+        agent = agents_collection.find_one({"key": api_key})
+        if not agent:
+            return make_response(
+                jsonify({"success": False, "message": "Invalid API key"}), 401
+            )
+        return safe_filename(agent.get("user"))
+
+    return None
+
+
+def _get_uploaded_file_size(file) -> int:
+    try:
+        current_position = file.stream.tell()
+        file.stream.seek(0, os.SEEK_END)
+        size_bytes = file.stream.tell()
+        file.stream.seek(current_position)
+        return size_bytes
+    except Exception:
+        return 0
+
+
+def _is_supported_audio_mimetype(mimetype: str) -> bool:
+    if not mimetype:
+        return True
+    normalized = mimetype.split(";")[0].strip().lower()
+    return normalized.startswith("audio/") or normalized in SUPPORTED_AUDIO_MIME_TYPES
+
+
+def _enforce_uploaded_audio_size_limit(file, filename: str) -> None:
+    if not is_audio_filename(filename):
+        return
+    size_bytes = _get_uploaded_file_size(file)
+    if size_bytes:
+        enforce_audio_file_size_limit(size_bytes)
+
+
+def _get_store_attachment_user_error(exc: Exception) -> str:
+    if isinstance(exc, AudioFileTooLargeError):
+        return build_stt_file_size_limit_message()
+    return "Failed to process file"
+
+
+def _require_live_stt_redis():
+    redis_client = get_redis_instance()
+    if redis_client:
+        return redis_client
+    return make_response(
+        jsonify({"success": False, "message": "Live transcription is unavailable"}),
+        503,
+    )
+
+
+def _parse_bool_form_value(value: str | None) -> bool:
+    if value is None:
+        return False
+    return value.strip().lower() in {"1", "true", "yes", "on"}
+
+
 @attachments_ns.route("/store_attachment")
 class StoreAttachment(Resource):
     @api.expect(
@@ -36,8 +125,9 @@ class StoreAttachment(Resource):
         description="Stores one or multiple attachments without vectorization or training. Supports user or API key authentication."
     )
     def post(self):
-        decoded_token = getattr(request, "decoded_token", None)
-        api_key = request.form.get("api_key") or request.args.get("api_key")
+        auth_user = _resolve_authenticated_user()
+        if hasattr(auth_user, "status_code"):
+            return auth_user
         
         files = request.files.getlist("file")
         if not files:
@@ -51,22 +141,16 @@ class StoreAttachment(Resource):
                 400,
             )
         
-        user = None
-        if decoded_token:
-            user = safe_filename(decoded_token.get("sub"))
-        elif api_key:
-            agent = agents_collection.find_one({"key": api_key})
-            if not agent:
-                return make_response(
-                    jsonify({"success": False, "message": "Invalid API key"}), 401
-                )
-            user = safe_filename(agent.get("user"))
-        else:
+        user = auth_user
+        if not user:
             return make_response(
                 jsonify({"success": False, "message": "Authentication required"}), 401
             )
         
         try:
+            from application.api.user.tasks import store_attachment
+            from application.api.user.base import storage
+
             tasks = []
             errors = []
             original_file_count = len(files)
@@ -75,6 +159,7 @@ class StoreAttachment(Resource):
                 try:
                     attachment_id = ObjectId()
                     original_filename = safe_filename(os.path.basename(file.filename))
+                    _enforce_uploaded_audio_size_limit(file, original_filename)
                     relative_path = f"{settings.UPLOAD_FOLDER}/{user}/attachments/{str(attachment_id)}/{original_filename}"
 
                     metadata = storage.save_file(file, relative_path)
@@ -90,20 +175,33 @@ class StoreAttachment(Resource):
                         "task_id": task.id,
                         "filename": original_filename,
                         "attachment_id": str(attachment_id),
+                        "upload_index": idx,
                     })
                 except Exception as file_err:
                     current_app.logger.error(f"Error processing file {idx} ({file.filename}): {file_err}", exc_info=True)
                     errors.append({
+                        "upload_index": idx,
                         "filename": file.filename,
-                        "error": str(file_err)
+                        "error": _get_store_attachment_user_error(file_err),
                     })
             
             if not tasks:
-                error_msg = "No valid files to upload"
-                if errors:
-                    error_msg += f". Errors: {errors}"
+                if errors and all(
+                    error.get("error") == build_stt_file_size_limit_message()
+                    for error in errors
+                ):
+                    return make_response(
+                        jsonify(
+                            {
+                                "success": False,
+                                "message": build_stt_file_size_limit_message(),
+                                "errors": errors,
+                            }
+                        ),
+                        413,
+                    )
                 return make_response(
-                    jsonify({"status": "error", "message": error_msg, "errors": errors}),
+                    jsonify({"status": "error", "message": "No valid files to upload"}),
                     400,
                 )
             
@@ -135,14 +233,392 @@ class StoreAttachment(Resource):
                 )
         except Exception as err:
             current_app.logger.error(f"Error storing attachment: {err}", exc_info=True)
-            return make_response(jsonify({"success": False, "error": str(err)}), 400)
+            return make_response(jsonify({"success": False, "error": "Failed to store attachment"}), 400)
+
+
+@attachments_ns.route("/stt")
+class SpeechToText(Resource):
+    @api.expect(
+        api.model(
+            "SpeechToTextModel",
+            {
+                "file": fields.Raw(required=True, description="Audio file"),
+                "language": fields.String(
+                    required=False, description="Optional transcription language hint"
+                ),
+            },
+        )
+    )
+    @api.doc(description="Transcribe an uploaded audio file")
+    def post(self):
+        auth_user = _resolve_authenticated_user()
+        if hasattr(auth_user, "status_code"):
+            return auth_user
+        if not auth_user:
+            return make_response(
+                jsonify({"success": False, "message": "Authentication required"}),
+                401,
+            )
+
+        file = request.files.get("file")
+        if not file or file.filename == "":
+            return make_response(
+                jsonify({"success": False, "message": "Missing file"}),
+                400,
+            )
+
+        filename = safe_filename(os.path.basename(file.filename))
+        suffix = Path(filename).suffix.lower()
+        if suffix not in SUPPORTED_AUDIO_EXTENSIONS:
+            return make_response(
+                jsonify({"success": False, "message": "Unsupported audio format"}),
+                400,
+            )
+
+        if not _is_supported_audio_mimetype(file.mimetype or ""):
+            return make_response(
+                jsonify({"success": False, "message": "Unsupported audio MIME type"}),
+                400,
+            )
+
+        try:
+            _enforce_uploaded_audio_size_limit(file, filename)
+        except AudioFileTooLargeError:
+            return make_response(
+                jsonify(
+                    {
+                        "success": False,
+                        "message": build_stt_file_size_limit_message(),
+                    }
+                ),
+                413,
+            )
+
+        temp_path = None
+        try:
+            with tempfile.NamedTemporaryFile(delete=False, suffix=suffix) as temp_file:
+                file.save(temp_file.name)
+                temp_path = Path(temp_file.name)
+
+            stt_instance = STTCreator.create_stt(settings.STT_PROVIDER)
+            transcript = stt_instance.transcribe(
+                temp_path,
+                language=request.form.get("language") or settings.STT_LANGUAGE,
+                timestamps=settings.STT_ENABLE_TIMESTAMPS,
+                diarize=settings.STT_ENABLE_DIARIZATION,
+            )
+            return make_response(jsonify({"success": True, **transcript}), 200)
+        except Exception as err:
+            current_app.logger.error(f"Error transcribing audio: {err}", exc_info=True)
+            return make_response(
+                jsonify({"success": False, "message": "Failed to transcribe audio"}),
+                400,
+            )
+        finally:
+            if temp_path and temp_path.exists():
+                temp_path.unlink()
+
+
+@attachments_ns.route("/stt/live/start")
+class LiveSpeechToTextStart(Resource):
+    @api.doc(description="Start a live speech-to-text session")
+    def post(self):
+        auth_user = _resolve_authenticated_user()
+        if hasattr(auth_user, "status_code"):
+            return auth_user
+        if not auth_user:
+            return make_response(
+                jsonify({"success": False, "message": "Authentication required"}),
+                401,
+            )
+
+        redis_client = _require_live_stt_redis()
+        if hasattr(redis_client, "status_code"):
+            return redis_client
+
+        payload = request.get_json(silent=True) or {}
+        session_state = create_live_stt_session(
+            user=auth_user,
+            language=payload.get("language") or settings.STT_LANGUAGE,
+        )
+        save_live_stt_session(redis_client, session_state)
+
+        return make_response(
+            jsonify(
+                {
+                    "success": True,
+                    "session_id": session_state["session_id"],
+                    "language": session_state.get("language"),
+                    "committed_text": "",
+                    "mutable_text": "",
+                    "previous_hypothesis": "",
+                    "latest_hypothesis": "",
+                    "finalized_text": "",
+                    "pending_text": "",
+                    "transcript_text": "",
+                }
+            ),
+            200,
+        )
+
+
+@attachments_ns.route("/stt/live/chunk")
+class LiveSpeechToTextChunk(Resource):
+    @api.expect(
+        api.model(
+            "LiveSpeechToTextChunkModel",
+            {
+                "session_id": fields.String(
+                    required=True, description="Live transcription session ID"
+                ),
+                "chunk_index": fields.Integer(
+                    required=True, description="Sequential chunk index"
+                ),
+                "is_silence": fields.Boolean(
+                    required=False,
+                    description="Whether the latest capture window was mostly silence",
+                ),
+                "file": fields.Raw(required=True, description="Audio chunk"),
+            },
+        )
+    )
+    @api.doc(description="Transcribe a chunk for a live speech-to-text session")
+    def post(self):
+        auth_user = _resolve_authenticated_user()
+        if hasattr(auth_user, "status_code"):
+            return auth_user
+        if not auth_user:
+            return make_response(
+                jsonify({"success": False, "message": "Authentication required"}),
+                401,
+            )
+
+        redis_client = _require_live_stt_redis()
+        if hasattr(redis_client, "status_code"):
+            return redis_client
+
+        session_id = request.form.get("session_id", "").strip()
+        if not session_id:
+            return make_response(
+                jsonify({"success": False, "message": "Missing session_id"}),
+                400,
+            )
+
+        session_state = load_live_stt_session(redis_client, session_id)
+        if not session_state:
+            return make_response(
+                jsonify(
+                    {
+                        "success": False,
+                        "message": "Live transcription session not found",
+                    }
+                ),
+                404,
+            )
+
+        if safe_filename(str(session_state.get("user", ""))) != auth_user:
+            return make_response(
+                jsonify({"success": False, "message": "Forbidden"}),
+                403,
+            )
+
+        chunk_index_raw = request.form.get("chunk_index", "").strip()
+        if chunk_index_raw == "":
+            return make_response(
+                jsonify({"success": False, "message": "Missing chunk_index"}),
+                400,
+            )
+
+        try:
+            chunk_index = int(chunk_index_raw)
+        except ValueError:
+            return make_response(
+                jsonify({"success": False, "message": "Invalid chunk_index"}),
+                400,
+            )
+        is_silence = _parse_bool_form_value(request.form.get("is_silence"))
+
+        file = request.files.get("file")
+        if not file or file.filename == "":
+            return make_response(
+                jsonify({"success": False, "message": "Missing file"}),
+                400,
+            )
+
+        filename = safe_filename(os.path.basename(file.filename))
+        suffix = Path(filename).suffix.lower()
+        if suffix not in SUPPORTED_AUDIO_EXTENSIONS:
+            return make_response(
+                jsonify({"success": False, "message": "Unsupported audio format"}),
+                400,
+            )
+
+        if not _is_supported_audio_mimetype(file.mimetype or ""):
+            return make_response(
+                jsonify({"success": False, "message": "Unsupported audio MIME type"}),
+                400,
+            )
+
+        try:
+            _enforce_uploaded_audio_size_limit(file, filename)
+        except AudioFileTooLargeError:
+            return make_response(
+                jsonify(
+                    {
+                        "success": False,
+                        "message": build_stt_file_size_limit_message(),
+                    }
+                ),
+                413,
+            )
+
+        temp_path = None
+        try:
+            with tempfile.NamedTemporaryFile(delete=False, suffix=suffix) as temp_file:
+                file.save(temp_file.name)
+                temp_path = Path(temp_file.name)
+
+            session_language = session_state.get("language") or settings.STT_LANGUAGE
+            stt_instance = STTCreator.create_stt(settings.STT_PROVIDER)
+            transcript = stt_instance.transcribe(
+                temp_path,
+                language=session_language,
+                timestamps=False,
+                diarize=False,
+            )
+            if not session_state.get("language") and transcript.get("language"):
+                session_state["language"] = transcript["language"]
+
+            try:
+                apply_live_stt_hypothesis(
+                    session_state,
+                    str(transcript.get("text", "")),
+                    chunk_index,
+                    is_silence=is_silence,
+                )
+            except ValueError:
+                current_app.logger.warning(
+                    "Invalid live transcription chunk",
+                    exc_info=True,
+                )
+                return make_response(
+                    jsonify(
+                        {
+                            "success": False,
+                            "message": "Invalid live transcription chunk",
+                        }
+                    ),
+                    409,
+                )
+            save_live_stt_session(redis_client, session_state)
+
+            return make_response(
+                jsonify(
+                    {
+                        "success": True,
+                        "session_id": session_id,
+                        "chunk_index": chunk_index,
+                        "chunk_text": transcript.get("text", ""),
+                        "is_silence": is_silence,
+                        "language": session_state.get("language"),
+                        "committed_text": session_state.get("committed_text", ""),
+                        "mutable_text": session_state.get("mutable_text", ""),
+                        "previous_hypothesis": session_state.get(
+                            "previous_hypothesis", ""
+                        ),
+                        "latest_hypothesis": session_state.get(
+                            "latest_hypothesis", ""
+                        ),
+                        "finalized_text": session_state.get("committed_text", ""),
+                        "pending_text": session_state.get("mutable_text", ""),
+                        "transcript_text": get_live_stt_transcript_text(session_state),
+                    }
+                ),
+                200,
+            )
+        except Exception as err:
+            current_app.logger.error(
+                f"Error transcribing live audio chunk: {err}", exc_info=True
+            )
+            return make_response(
+                jsonify({"success": False, "message": "Failed to transcribe audio"}),
+                400,
+            )
+        finally:
+            if temp_path and temp_path.exists():
+                temp_path.unlink()
+
+
+@attachments_ns.route("/stt/live/finish")
+class LiveSpeechToTextFinish(Resource):
+    @api.doc(description="Finish a live speech-to-text session")
+    def post(self):
+        auth_user = _resolve_authenticated_user()
+        if hasattr(auth_user, "status_code"):
+            return auth_user
+        if not auth_user:
+            return make_response(
+                jsonify({"success": False, "message": "Authentication required"}),
+                401,
+            )
+
+        redis_client = _require_live_stt_redis()
+        if hasattr(redis_client, "status_code"):
+            return redis_client
+
+        payload = request.get_json(silent=True) or {}
+        session_id = str(payload.get("session_id", "")).strip()
+        if not session_id:
+            return make_response(
+                jsonify({"success": False, "message": "Missing session_id"}),
+                400,
+            )
+
+        session_state = load_live_stt_session(redis_client, session_id)
+        if not session_state:
+            return make_response(
+                jsonify(
+                    {
+                        "success": False,
+                        "message": "Live transcription session not found",
+                    }
+                ),
+                404,
+            )
+
+        if safe_filename(str(session_state.get("user", ""))) != auth_user:
+            return make_response(
+                jsonify({"success": False, "message": "Forbidden"}),
+                403,
+            )
+
+        final_text = finalize_live_stt_session(session_state)
+        delete_live_stt_session(redis_client, session_id)
+
+        return make_response(
+            jsonify(
+                {
+                    "success": True,
+                    "session_id": session_id,
+                    "language": session_state.get("language"),
+                    "text": final_text,
+                }
+            ),
+            200,
+        )
 
 
 @attachments_ns.route("/images/<path:image_path>")
 class ServeImage(Resource):
     @api.doc(description="Serve an image from storage")
     def get(self, image_path):
+        if ".." in image_path or image_path.startswith("/") or "\x00" in image_path:
+            return make_response(
+                jsonify({"success": False, "message": "Invalid image path"}), 400
+            )
         try:
+            from application.api.user.base import storage
+
             file_obj = storage.get_file(image_path)
             extension = image_path.split(".")[-1].lower()
             content_type = f"image/{extension}"
@@ -157,6 +633,10 @@ class ServeImage(Resource):
             return make_response(
                 jsonify({"success": False, "message": "Image not found"}), 404
             )
+        except ValueError:
+            return make_response(
+                jsonify({"success": False, "message": "Invalid image path"}), 400
+            )
         except Exception as e:
             current_app.logger.error(f"Error serving image: {e}")
             return make_response(

application/api/user/base.py

@@ -15,6 +15,8 @@ from werkzeug.utils import secure_filename
 
 from application.core.mongo_db import MongoDB
 from application.core.settings import settings
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.users import UsersRepository
 from application.storage.storage_creator import StorageCreator
 from application.vectorstore.vector_creator import VectorCreator
 
@@ -31,12 +33,17 @@ sources_collection = db["sources"]
 prompts_collection = db["prompts"]
 feedback_collection = db["feedback"]
 agents_collection = db["agents"]
+agent_folders_collection = db["agent_folders"]
 token_usage_collection = db["token_usage"]
 shared_conversations_collections = db["shared_conversations"]
 users_collection = db["users"]
 user_logs_collection = db["user_logs"]
 user_tools_collection = db["user_tools"]
 attachments_collection = db["attachments"]
+workflow_runs_collection = db["workflow_runs"]
+workflows_collection = db["workflows"]
+workflow_nodes_collection = db["workflow_nodes"]
+workflow_edges_collection = db["workflow_edges"]
 
 
 try:
@@ -46,6 +53,25 @@ try:
         background=True,
     )
     users_collection.create_index("user_id", unique=True)
+    workflows_collection.create_index(
+        [("user", 1)], name="workflow_user_index", background=True
+    )
+    workflow_nodes_collection.create_index(
+        [("workflow_id", 1)], name="node_workflow_index", background=True
+    )
+    workflow_nodes_collection.create_index(
+        [("workflow_id", 1), ("graph_version", 1)],
+        name="node_workflow_graph_version_index",
+        background=True,
+    )
+    workflow_edges_collection.create_index(
+        [("workflow_id", 1)], name="edge_workflow_index", background=True
+    )
+    workflow_edges_collection.create_index(
+        [("workflow_id", 1), ("graph_version", 1)],
+        name="edge_workflow_graph_version_index",
+        background=True,
+    )
 except Exception as e:
     print("Error creating indexes:", e)
 current_dir = os.path.dirname(
@@ -108,6 +134,9 @@ def ensure_user_doc(user_id):
     if updates:
         users_collection.update_one({"user_id": user_id}, {"$set": updates})
         user_doc = users_collection.find_one({"user_id": user_id})
+
+    dual_write(UsersRepository, lambda repo: repo.upsert(user_id))
+
     return user_doc
 
 
@@ -121,14 +150,22 @@ def resolve_tool_details(tool_ids):
     Returns:
         List of tool details with id, name, and display_name
     """
+    valid_ids = []
+    for tid in tool_ids:
+        try:
+            valid_ids.append(ObjectId(tid))
+        except Exception:
+            continue
     tools = user_tools_collection.find(
-        {"_id": {"$in": [ObjectId(tid) for tid in tool_ids]}}
-    )
+        {"_id": {"$in": valid_ids}}
+    ) if valid_ids else []
     return [
         {
             "id": str(tool["_id"]),
             "name": tool.get("name", ""),
-            "display_name": tool.get("displayName", tool.get("name", "")),
+            "display_name": tool.get("customName")
+            or tool.get("displayName")
+            or tool.get("name", ""),
         }
         for tool in tools
     ]

application/api/user/conversations/routes.py

@@ -8,6 +8,8 @@ from flask_restx import fields, Namespace, Resource
 
 from application.api import api
 from application.api.user.base import attachments_collection, conversations_collection
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.conversations import ConversationsRepository
 from application.utils import check_required_fields
 
 conversations_ns = Namespace(
@@ -30,15 +32,23 @@ class DeleteConversation(Resource):
             return make_response(
                 jsonify({"success": False, "message": "ID is required"}), 400
             )
+        user_id = decoded_token["sub"]
         try:
             conversations_collection.delete_one(
-                {"_id": ObjectId(conversation_id), "user": decoded_token["sub"]}
+                {"_id": ObjectId(conversation_id), "user": user_id}
             )
         except Exception as err:
             current_app.logger.error(
                 f"Error deleting conversation: {err}", exc_info=True
             )
             return make_response(jsonify({"success": False}), 400)
+
+        def _pg_delete(repo: ConversationsRepository) -> None:
+            conv = repo.get_by_legacy_id(conversation_id)
+            if conv is not None:
+                repo.delete(conv["id"], user_id)
+
+        dual_write(ConversationsRepository, _pg_delete)
         return make_response(jsonify({"success": True}), 200)
 
 
@@ -59,6 +69,11 @@ class DeleteAllConversations(Resource):
                 f"Error deleting all conversations: {err}", exc_info=True
             )
             return make_response(jsonify({"success": False}), 400)
+
+        dual_write(
+            ConversationsRepository,
+            lambda r, uid=user_id: r.delete_all_for_user(uid),
+        )
         return make_response(jsonify({"success": True}), 200)
 
 
@@ -190,9 +205,10 @@ class UpdateConversationName(Resource):
         missing_fields = check_required_fields(data, required_fields)
         if missing_fields:
             return missing_fields
+        user_id = decoded_token.get("sub")
         try:
             conversations_collection.update_one(
-                {"_id": ObjectId(data["id"]), "user": decoded_token.get("sub")},
+                {"_id": ObjectId(data["id"]), "user": user_id},
                 {"$set": {"name": data["name"]}},
             )
         except Exception as err:
@@ -200,6 +216,13 @@ class UpdateConversationName(Resource):
                 f"Error updating conversation name: {err}", exc_info=True
             )
             return make_response(jsonify({"success": False}), 400)
+
+        def _pg_rename(repo: ConversationsRepository) -> None:
+            conv = repo.get_by_legacy_id(data["id"])
+            if conv is not None:
+                repo.rename(conv["id"], user_id, data["name"])
+
+        dual_write(ConversationsRepository, _pg_rename)
         return make_response(jsonify({"success": True}), 200)
 
 
@@ -277,4 +300,21 @@ class SubmitFeedback(Resource):
         except Exception as err:
             current_app.logger.error(f"Error submitting feedback: {err}", exc_info=True)
             return make_response(jsonify({"success": False}), 400)
+
+        # Dual-write to Postgres: mirror the per-message feedback set/unset.
+        feedback_value = data["feedback"]
+        question_index = int(data["question_index"])
+        feedback_payload = (
+            None if feedback_value is None
+            else {"text": feedback_value, "timestamp": datetime.datetime.now(
+                datetime.timezone.utc
+            ).isoformat()}
+        )
+
+        def _pg_feedback(repo: ConversationsRepository) -> None:
+            conv = repo.get_by_legacy_id(data["conversation_id"])
+            if conv is not None:
+                repo.set_feedback(conv["id"], question_index, feedback_payload)
+
+        dual_write(ConversationsRepository, _pg_feedback)
         return make_response(jsonify({"success": True}), 200)

application/api/user/prompts/routes.py

@@ -8,6 +8,8 @@ from flask_restx import fields, Namespace, Resource
 
 from application.api import api
 from application.api.user.base import current_dir, prompts_collection
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.prompts import PromptsRepository
 from application.utils import check_required_fields
 
 prompts_ns = Namespace(
@@ -49,6 +51,12 @@ class CreatePrompt(Resource):
                 }
             )
             new_id = str(resp.inserted_id)
+            dual_write(
+                PromptsRepository,
+                lambda repo, u=user, n=data["name"], c=data["content"], mid=new_id: repo.create(
+                    u, n, c, legacy_mongo_id=mid,
+                ),
+            )
         except Exception as err:
             current_app.logger.error(f"Error creating prompt: {err}", exc_info=True)
             return make_response(jsonify({"success": False}), 400)
@@ -149,6 +157,10 @@ class DeletePrompt(Resource):
             return missing_fields
         try:
             prompts_collection.delete_one({"_id": ObjectId(data["id"]), "user": user})
+            dual_write(
+                PromptsRepository,
+                lambda repo, pid=data["id"], u=user: repo.delete_by_legacy_id(pid, u),
+            )
         except Exception as err:
             current_app.logger.error(f"Error deleting prompt: {err}", exc_info=True)
             return make_response(jsonify({"success": False}), 400)
@@ -185,6 +197,12 @@ class UpdatePrompt(Resource):
                 {"_id": ObjectId(data["id"]), "user": user},
                 {"$set": {"name": data["name"], "content": data["content"]}},
             )
+            dual_write(
+                PromptsRepository,
+                lambda repo, pid=data["id"], u=user, n=data["name"], c=data["content"]: repo.update_by_legacy_id(
+                    pid, u, n, c,
+                ),
+            )
         except Exception as err:
             current_app.logger.error(f"Error updating prompt: {err}", exc_info=True)
             return make_response(jsonify({"success": False}), 400)

application/api/user/routes.py

@@ -5,8 +5,7 @@ Main user API routes - registers all namespace modules.
 from flask import Blueprint
 
 from application.api import api
-from .agents import agents_ns, agents_sharing_ns, agents_webhooks_ns
-
+from .agents import agents_ns, agents_sharing_ns, agents_webhooks_ns, agents_folders_ns
 from .analytics import analytics_ns
 from .attachments import attachments_ns
 from .conversations import conversations_ns
@@ -15,6 +14,7 @@ from .prompts import prompts_ns
 from .sharing import sharing_ns
 from .sources import sources_chunks_ns, sources_ns, sources_upload_ns
 from .tools import tools_mcp_ns, tools_ns
+from .workflows import workflows_ns
 
 
 user = Blueprint("user", __name__)
@@ -31,10 +31,11 @@ api.add_namespace(conversations_ns)
 # Models
 api.add_namespace(models_ns)
 
-# Agents (main, sharing, webhooks)
+# Agents (main, sharing, webhooks, folders)
 api.add_namespace(agents_ns)
 api.add_namespace(agents_sharing_ns)
 api.add_namespace(agents_webhooks_ns)
+api.add_namespace(agents_folders_ns)
 
 # Prompts
 api.add_namespace(prompts_ns)
@@ -50,3 +51,6 @@ api.add_namespace(sources_upload_ns)
 # Tools (main, MCP)
 api.add_namespace(tools_ns)
 api.add_namespace(tools_mcp_ns)
+
+# Workflows
+api.add_namespace(workflows_ns)

application/api/user/sharing/routes.py

@@ -15,8 +15,71 @@ from application.api.user.base import (
     conversations_collection,
     shared_conversations_collections,
 )
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.conversations import ConversationsRepository
+from application.storage.db.repositories.shared_conversations import (
+    SharedConversationsRepository,
+)
 from application.utils import check_required_fields
 
+
+def _dual_write_share(
+    mongo_conv_id: str,
+    share_uuid: str,
+    user: str,
+    *,
+    is_promptable: bool,
+    first_n_queries: int,
+    api_key: str | None,
+    prompt_id: str | None = None,
+    chunks: int | None = None,
+) -> None:
+    """Mirror a Mongo share-record insert into Postgres.
+
+    Preserves the Mongo-generated UUID so public ``/shared/{uuid}`` URLs
+    resolve from both stores during cutover.
+    """
+    def _write(repo: SharedConversationsRepository) -> None:
+        conv = ConversationsRepository(repo._conn).get_by_legacy_id(
+            mongo_conv_id, user_id=user,
+        )
+        if conv is None:
+            return
+        # prompt_id / chunks are only meaningful for promptable shares;
+        # prompt_id is often the string "default" or an ObjectId that
+        # hasn't been migrated — pass as-is and let the repo drop
+        # non-UUID values. Scope the prompt lookup by user_id so an
+        # authenticated caller can't link another user's prompt into
+        # their share record.
+        resolved_prompt_id = None
+        if prompt_id and len(str(prompt_id)) == 24:
+            from sqlalchemy import text as _text
+            row = repo._conn.execute(
+                _text(
+                    "SELECT id FROM prompts "
+                    "WHERE legacy_mongo_id = :legacy_id AND user_id = :user_id"
+                ),
+                {"legacy_id": str(prompt_id), "user_id": user},
+            ).fetchone()
+            if row:
+                resolved_prompt_id = str(row[0])
+        # get_or_create is race-free on the PG side thanks to the
+        # composite partial unique index on the dedup tuple
+        # (migration 0008). It converges concurrent share requests to
+        # a single row.
+        repo.get_or_create(
+            conv["id"],
+            user,
+            is_promptable=is_promptable,
+            first_n_queries=first_n_queries,
+            api_key=api_key,
+            prompt_id=resolved_prompt_id,
+            chunks=chunks,
+            share_uuid=share_uuid,
+        )
+
+    dual_write(SharedConversationsRepository, _write)
+
 sharing_ns = Namespace(
     "sharing", description="Conversation sharing operations", path="/api"
 )
@@ -57,7 +120,7 @@ class ShareConversation(Resource):
 
         try:
             conversation = conversations_collection.find_one(
-                {"_id": ObjectId(conversation_id)}
+                {"_id": ObjectId(conversation_id), "user": user}
             )
             if conversation is None:
                 return make_response(
@@ -124,6 +187,16 @@ class ShareConversation(Resource):
                                 "api_key": api_uuid,
                             }
                         )
+                        _dual_write_share(
+                            conversation_id,
+                            str(explicit_binary.as_uuid()),
+                            user,
+                            is_promptable=is_promptable,
+                            first_n_queries=current_n_queries,
+                            api_key=api_uuid,
+                            prompt_id=prompt_id,
+                            chunks=int(chunks) if chunks else None,
+                        )
                         return make_response(
                             jsonify(
                                 {
@@ -155,6 +228,16 @@ class ShareConversation(Resource):
                             "api_key": api_uuid,
                         }
                     )
+                    _dual_write_share(
+                        conversation_id,
+                        str(explicit_binary.as_uuid()),
+                        user,
+                        is_promptable=is_promptable,
+                        first_n_queries=current_n_queries,
+                        api_key=api_uuid,
+                        prompt_id=prompt_id,
+                        chunks=int(chunks) if chunks else None,
+                    )
                     return make_response(
                         jsonify(
                             {
@@ -192,6 +275,14 @@ class ShareConversation(Resource):
                         "user": user,
                     }
                 )
+                _dual_write_share(
+                    conversation_id,
+                    str(explicit_binary.as_uuid()),
+                    user,
+                    is_promptable=is_promptable,
+                    first_n_queries=current_n_queries,
+                    api_key=None,
+                )
                 return make_response(
                     jsonify(
                         {"success": True, "identifier": str(explicit_binary.as_uuid())}
@@ -220,8 +311,23 @@ class GetPubliclySharedConversations(Resource):
                 shared
                 and "conversation_id" in shared
             ):
-                # conversation_id is now stored as an ObjectId, not a DBRef
+                # Handle DBRef (legacy), ObjectId, dict, and string formats for conversation_id
                 conversation_id = shared["conversation_id"]
+                if isinstance(conversation_id, DBRef):
+                    conversation_id = conversation_id.id
+                elif isinstance(conversation_id, dict):
+                    # Handle dict representation of DBRef (e.g., {"$ref": "...", "$id": "..."})
+                    if "$id" in conversation_id:
+                        conv_id = conversation_id["$id"]
+                        # $id might be a dict like {"$oid": "..."} or a string
+                        if isinstance(conv_id, dict) and "$oid" in conv_id:
+                            conversation_id = ObjectId(conv_id["$oid"])
+                        else:
+                            conversation_id = ObjectId(conv_id)
+                    elif "_id" in conversation_id:
+                        conversation_id = ObjectId(conversation_id["_id"])
+                elif isinstance(conversation_id, str):
+                    conversation_id = ObjectId(conversation_id)
                 conversation = conversations_collection.find_one(
                     {"_id": conversation_id}
                 )

application/api/user/sources/chunks.py

@@ -55,9 +55,14 @@ class GetChunks(Resource):
 
                 if path:
                     chunk_source = metadata.get("source", "")
-                    # Check if the chunk's source matches the requested path
+                    chunk_file_path = metadata.get("file_path", "")
+                    # Check if the chunk matches the requested path
+                    # For file uploads: source ends with path (e.g., "inputs/.../file.pdf" ends with "file.pdf")
+                    # For crawlers: file_path ends with path (e.g., "guides/setup.md" ends with "setup.md")
+                    source_match = chunk_source and chunk_source.endswith(path)
+                    file_path_match = chunk_file_path and chunk_file_path.endswith(path)
 
-                    if not chunk_source or not chunk_source.endswith(path):
+                    if not (source_match or file_path_match):
                         continue
                 # Filter by search term if provided
 

application/api/user/sources/routes.py

@@ -9,6 +9,7 @@ from flask_restx import fields, Namespace, Resource
 
 from application.api import api
 from application.api.user.base import sources_collection
+from application.api.user.tasks import sync_source
 from application.core.settings import settings
 from application.storage.storage_creator import StorageCreator
 from application.utils import check_required_fields
@@ -20,6 +21,21 @@ sources_ns = Namespace(
 )
 
 
+def _get_provider_from_remote_data(remote_data):
+    if not remote_data:
+        return None
+    if isinstance(remote_data, dict):
+        return remote_data.get("provider")
+    if isinstance(remote_data, str):
+        try:
+            remote_data_obj = json.loads(remote_data)
+        except Exception:
+            return None
+        if isinstance(remote_data_obj, dict):
+            return remote_data_obj.get("provider")
+    return None
+
+
 @sources_ns.route("/sources")
 class CombinedJson(Resource):
     @api.doc(description="Provide JSON file with combined available indexes")
@@ -41,6 +57,7 @@ class CombinedJson(Resource):
 
         try:
             for index in sources_collection.find({"user": user}).sort("date", -1):
+                provider = _get_provider_from_remote_data(index.get("remote_data"))
                 data.append(
                     {
                         "id": str(index["_id"]),
@@ -51,6 +68,7 @@ class CombinedJson(Resource):
                         "tokens": index.get("tokens", ""),
                         "retriever": index.get("retriever", "classic"),
                         "syncFrequency": index.get("sync_frequency", ""),
+                        "provider": provider,
                         "is_nested": bool(index.get("directory_structure")),
                         "type": index.get(
                             "type", "file"
@@ -107,6 +125,7 @@ class PaginatedSources(Resource):
 
             paginated_docs = []
             for doc in documents:
+                provider = _get_provider_from_remote_data(doc.get("remote_data"))
                 doc_data = {
                     "id": str(doc["_id"]),
                     "name": doc.get("name", ""),
@@ -116,6 +135,7 @@ class PaginatedSources(Resource):
                     "tokens": doc.get("tokens", ""),
                     "retriever": doc.get("retriever", "classic"),
                     "syncFrequency": doc.get("sync_frequency", ""),
+                    "provider": provider,
                     "isNested": bool(doc.get("directory_structure")),
                     "type": doc.get("type", "file"),
                 }
@@ -240,7 +260,7 @@ class ManageSync(Resource):
         if not decoded_token:
             return make_response(jsonify({"success": False}), 401)
         user = decoded_token.get("sub")
-        data = request.get_json()
+        data = request.get_json() or {}
         required_fields = ["source_id", "sync_frequency"]
         missing_fields = check_required_fields(data, required_fields)
         if missing_fields:
@@ -269,6 +289,72 @@ class ManageSync(Resource):
         return make_response(jsonify({"success": True}), 200)
 
 
+@sources_ns.route("/sync_source")
+class SyncSource(Resource):
+    sync_source_model = api.model(
+        "SyncSourceModel",
+        {"source_id": fields.String(required=True, description="Source ID")},
+    )
+
+    @api.expect(sync_source_model)
+    @api.doc(description="Trigger an immediate sync for a source")
+    def post(self):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        data = request.get_json()
+        required_fields = ["source_id"]
+        missing_fields = check_required_fields(data, required_fields)
+        if missing_fields:
+            return missing_fields
+        source_id = data["source_id"]
+        if not ObjectId.is_valid(source_id):
+            return make_response(
+                jsonify({"success": False, "message": "Invalid source ID"}), 400
+            )
+        doc = sources_collection.find_one(
+            {"_id": ObjectId(source_id), "user": user}
+        )
+        if not doc:
+            return make_response(
+                jsonify({"success": False, "message": "Source not found"}), 404
+            )
+        source_type = doc.get("type", "")
+        if source_type.startswith("connector"):
+            return make_response(
+                jsonify(
+                    {
+                        "success": False,
+                        "message": "Connector sources must be synced via /api/connectors/sync",
+                    }
+                ),
+                400,
+            )
+        source_data = doc.get("remote_data")
+        if not source_data:
+            return make_response(
+                jsonify({"success": False, "message": "Source is not syncable"}), 400
+            )
+        try:
+            task = sync_source.delay(
+                source_data=source_data,
+                job_name=doc.get("name", ""),
+                user=user,
+                loader=source_type,
+                sync_frequency=doc.get("sync_frequency", "never"),
+                retriever=doc.get("retriever", "classic"),
+                doc_id=source_id,
+            )
+        except Exception as err:
+            current_app.logger.error(
+                f"Error starting sync for source {source_id}: {err}",
+                exc_info=True,
+            )
+            return make_response(jsonify({"success": False}), 400)
+        return make_response(jsonify({"success": True, "task_id": task.id}), 200)
+
+
 @sources_ns.route("/directory_structure")
 class DirectoryStructure(Resource):
     @api.doc(
@@ -320,4 +406,4 @@ class DirectoryStructure(Resource):
             current_app.logger.error(
                 f"Error retrieving directory structure: {e}", exc_info=True
             )
-            return make_response(jsonify({"success": False, "error": str(e)}), 500)
+            return make_response(jsonify({"success": False, "error": "Failed to retrieve directory structure"}), 500)

application/api/user/sources/upload.py

@@ -14,7 +14,14 @@ from application.api.user.base import sources_collection
 from application.api.user.tasks import ingest, ingest_connector_task, ingest_remote
 from application.core.settings import settings
 from application.parser.connectors.connector_creator import ConnectorCreator
+from application.parser.file.constants import SUPPORTED_SOURCE_EXTENSIONS
 from application.storage.storage_creator import StorageCreator
+from application.stt.upload_limits import (
+    AudioFileTooLargeError,
+    build_stt_file_size_limit_message,
+    enforce_audio_file_size_limit,
+    is_audio_filename,
+)
 from application.utils import check_required_fields, safe_filename
 
 
@@ -23,6 +30,12 @@ sources_upload_ns = Namespace(
 )
 
 
+def _enforce_audio_path_size_limit(file_path: str, filename: str) -> None:
+    if not is_audio_filename(filename):
+        return
+    enforce_audio_file_size_limit(os.path.getsize(file_path))
+
+
 @sources_upload_ns.route("/upload")
 class UploadFile(Resource):
     @api.expect(
@@ -64,19 +77,28 @@ class UploadFile(Resource):
         safe_user = safe_filename(user)
         dir_name = safe_filename(job_name)
         base_path = f"{settings.UPLOAD_FOLDER}/{safe_user}/{dir_name}"
+        file_name_map = {}
 
         try:
             storage = StorageCreator.get_storage()
 
             for file in files:
-                original_filename = file.filename
+                original_filename = os.path.basename(file.filename)
                 safe_file = safe_filename(original_filename)
+                if original_filename:
+                    file_name_map[safe_file] = original_filename
 
                 with tempfile.TemporaryDirectory() as temp_dir:
                     temp_file_path = os.path.join(temp_dir, safe_file)
                     file.save(temp_file_path)
+                    _enforce_audio_path_size_limit(temp_file_path, safe_file)
 
-                    if zipfile.is_zipfile(temp_file_path):
+                    # Only extract actual .zip files, not Office formats (.docx, .xlsx, .pptx)
+                    # which are technically zip archives but should be processed as-is
+                    is_office_format = safe_file.lower().endswith(
+                        (".docx", ".xlsx", ".pptx", ".odt", ".ods", ".odp", ".epub")
+                    )
+                    if zipfile.is_zipfile(temp_file_path) and not is_office_format:
                         try:
                             with zipfile.ZipFile(temp_file_path, "r") as zip_ref:
                                 zip_ref.extractall(path=temp_dir)
@@ -94,6 +116,10 @@ class UploadFile(Resource):
                                             os.path.join(root, extracted_file), temp_dir
                                         )
                                         storage_path = f"{base_path}/{rel_path}"
+                                        _enforce_audio_path_size_limit(
+                                            os.path.join(root, extracted_file),
+                                            extracted_file,
+                                        )
 
                                         with open(
                                             os.path.join(root, extracted_file), "rb"
@@ -116,27 +142,22 @@ class UploadFile(Resource):
                             storage.save_file(f, file_path)
             task = ingest.delay(
                 settings.UPLOAD_FOLDER,
-                [
-                    ".rst",
-                    ".md",
-                    ".pdf",
-                    ".txt",
-                    ".docx",
-                    ".csv",
-                    ".epub",
-                    ".html",
-                    ".mdx",
-                    ".json",
-                    ".xlsx",
-                    ".pptx",
-                    ".png",
-                    ".jpg",
-                    ".jpeg",
-                ],
+                list(SUPPORTED_SOURCE_EXTENSIONS),
                 job_name,
                 user,
                 file_path=base_path,
                 filename=dir_name,
+                file_name_map=file_name_map,
+            )
+        except AudioFileTooLargeError:
+            return make_response(
+                jsonify(
+                    {
+                        "success": False,
+                        "message": build_stt_file_size_limit_message(),
+                    }
+                ),
+                413,
             )
         except Exception as err:
             current_app.logger.error(f"Error uploading file: {err}", exc_info=True)
@@ -182,6 +203,8 @@ class UploadRemote(Resource):
                 source_data = config.get("url")
             elif data["source"] == "reddit":
                 source_data = config
+            elif data["source"] == "s3":
+                source_data = config
             elif data["source"] in ConnectorCreator.get_supported_connectors():
                 session_token = config.get("session_token")
                 if not session_token:
@@ -334,6 +357,14 @@ class ManageSourceFiles(Resource):
             storage = StorageCreator.get_storage()
             source_file_path = source.get("file_path", "")
             parent_dir = request.form.get("parent_dir", "")
+            file_name_map = source.get("file_name_map") or {}
+            if isinstance(file_name_map, str):
+                try:
+                    file_name_map = json.loads(file_name_map)
+                except Exception:
+                    file_name_map = {}
+            if not isinstance(file_name_map, dict):
+                file_name_map = {}
 
             if parent_dir and (parent_dir.startswith("/") or ".." in parent_dir):
                 return make_response(
@@ -355,19 +386,35 @@ class ManageSourceFiles(Resource):
                         400,
                     )
                 added_files = []
+                map_updated = False
 
                 target_dir = source_file_path
                 if parent_dir:
                     target_dir = f"{source_file_path}/{parent_dir}"
                 for file in files:
                     if file.filename:
-                        safe_filename_str = safe_filename(file.filename)
+                        original_filename = os.path.basename(file.filename)
+                        safe_filename_str = safe_filename(original_filename)
                         file_path = f"{target_dir}/{safe_filename_str}"
 
                         # Save file to storage
 
                         storage.save_file(file, file_path)
                         added_files.append(safe_filename_str)
+                        if original_filename:
+                            relative_key = (
+                                f"{parent_dir}/{safe_filename_str}"
+                                if parent_dir
+                                else safe_filename_str
+                            )
+                            file_name_map[relative_key] = original_filename
+                            map_updated = True
+
+                if map_updated:
+                    sources_collection.update_one(
+                        {"_id": ObjectId(source_id)},
+                        {"$set": {"file_name_map": file_name_map}},
+                    )
                 # Trigger re-ingestion pipeline
 
                 from application.api.user.tasks import reingest_source_task
@@ -414,7 +461,18 @@ class ManageSourceFiles(Resource):
                 # Remove files from storage and directory structure
 
                 removed_files = []
+                map_updated = False
                 for file_path in file_paths:
+                    if ".." in str(file_path) or str(file_path).startswith("/"):
+                        return make_response(
+                            jsonify(
+                                {
+                                    "success": False,
+                                    "message": "Invalid file path",
+                                }
+                            ),
+                            400,
+                        )
                     full_path = f"{source_file_path}/{file_path}"
 
                     # Remove from storage
@@ -422,6 +480,15 @@ class ManageSourceFiles(Resource):
                     if storage.file_exists(full_path):
                         storage.delete_file(full_path)
                         removed_files.append(file_path)
+                    if file_path in file_name_map:
+                        file_name_map.pop(file_path, None)
+                        map_updated = True
+
+                if map_updated and isinstance(file_name_map, dict):
+                    sources_collection.update_one(
+                        {"_id": ObjectId(source_id)},
+                        {"$set": {"file_name_map": file_name_map}},
+                    )
                 # Trigger re-ingestion pipeline
 
                 from application.api.user.tasks import reingest_source_task
@@ -504,6 +571,20 @@ class ManageSourceFiles(Resource):
                     f"User: {user}, Source ID: {source_id}, Directory path: {directory_path}, "
                     f"Full path: {full_directory_path}"
                 )
+                if directory_path and file_name_map:
+                    prefix = f"{directory_path.rstrip('/')}/"
+                    keys_to_remove = [
+                        key
+                        for key in file_name_map.keys()
+                        if key == directory_path or key.startswith(prefix)
+                    ]
+                    if keys_to_remove:
+                        for key in keys_to_remove:
+                            file_name_map.pop(key, None)
+                        sources_collection.update_one(
+                            {"_id": ObjectId(source_id)},
+                            {"$set": {"file_name_map": file_name_map}},
+                        )
 
                 # Trigger re-ingestion pipeline
 
@@ -574,8 +655,9 @@ class TaskStatus(Resource):
             ):
                 task_meta = str(task_meta)  # Convert to a string representation
         except ConnectionError as err:
+            current_app.logger.error(f"Connection error getting task status: {err}")
             return make_response(
-                jsonify({"success": False, "message": str(err)}), 503
+                jsonify({"success": False, "message": "Service unavailable"}), 503
             )
         except Exception as err:
             current_app.logger.error(f"Error getting task status: {err}", exc_info=True)

application/api/user/tasks.py

@@ -8,13 +8,25 @@ from application.worker import (
     mcp_oauth,
     mcp_oauth_status,
     remote_worker,
+    sync,
     sync_worker,
 )
 
 
 @celery.task(bind=True)
-def ingest(self, directory, formats, job_name, user, file_path, filename):
-    resp = ingest_worker(self, directory, formats, job_name, file_path, filename, user)
+def ingest(
+    self, directory, formats, job_name, user, file_path, filename, file_name_map=None
+):
+    resp = ingest_worker(
+        self,
+        directory,
+        formats,
+        job_name,
+        file_path,
+        filename,
+        user,
+        file_name_map=file_name_map,
+    )
     return resp
 
 
@@ -38,6 +50,30 @@ def schedule_syncs(self, frequency):
     return resp
 
 
+@celery.task(bind=True)
+def sync_source(
+    self,
+    source_data,
+    job_name,
+    user,
+    loader,
+    sync_frequency,
+    retriever,
+    doc_id,
+):
+    resp = sync(
+        self,
+        source_data,
+        job_name,
+        user,
+        loader,
+        sync_frequency,
+        retriever,
+        doc_id,
+    )
+    return resp
+
+
 @celery.task(bind=True)
 def store_attachment(self, file_info, user):
     resp = attachment_worker(self, file_info, user)
@@ -98,6 +134,12 @@ def setup_periodic_tasks(sender, **kwargs):
         timedelta(days=30),
         schedule_syncs.s("monthly"),
     )
+    # Replaces Mongo's TTL index on pending_tool_state.expires_at.
+    sender.add_periodic_task(
+        timedelta(seconds=60),
+        cleanup_pending_tool_state.s(),
+        name="cleanup-pending-tool-state",
+    )
 
 
 @celery.task(bind=True)
@@ -110,3 +152,27 @@ def mcp_oauth_task(self, config, user):
 def mcp_oauth_status_task(self, task_id):
     resp = mcp_oauth_status(self, task_id)
     return resp
+
+
+@celery.task(bind=True)
+def cleanup_pending_tool_state(self):
+    """Delete pending_tool_state rows past their TTL.
+
+    Replaces Mongo's ``expireAfterSeconds=0`` TTL index — Postgres has
+    no native TTL, so this task runs every 60 seconds to keep
+    ``pending_tool_state`` bounded. No-ops if ``POSTGRES_URI`` isn't
+    configured (keeps the task runnable in Mongo-only environments).
+    """
+    from application.core.settings import settings
+    if not settings.POSTGRES_URI:
+        return {"deleted": 0, "skipped": "POSTGRES_URI not set"}
+
+    from application.storage.db.engine import get_engine
+    from application.storage.db.repositories.pending_tool_state import (
+        PendingToolStateRepository,
+    )
+
+    engine = get_engine()
+    with engine.begin() as conn:
+        deleted = PendingToolStateRepository(conn).cleanup_expired()
+    return {"deleted": deleted}

application/api/user/tools/mcp.py

@@ -1,21 +1,83 @@
 """Tool management MCP server integration."""
 
 import json
-from email.quoprimime import unquote
+from urllib.parse import urlencode, urlparse
 
 from bson.objectid import ObjectId
 from flask import current_app, jsonify, make_response, redirect, request
-from flask_restx import fields, Namespace, Resource
+from flask_restx import Namespace, Resource, fields
 
 from application.agents.tools.mcp_tool import MCPOAuthManager, MCPTool
 from application.api import api
 from application.api.user.base import user_tools_collection
+from application.api.user.tools.routes import transform_actions
 from application.cache import get_redis_instance
-from application.security.encryption import encrypt_credentials
+from application.core.mongo_db import MongoDB
+from application.core.settings import settings
+from application.core.url_validation import SSRFError, validate_url
+from application.security.encryption import decrypt_credentials, encrypt_credentials
 from application.utils import check_required_fields
 
 tools_mcp_ns = Namespace("tools", description="Tool management operations", path="/api")
 
+_mongo = MongoDB.get_client()
+_db = _mongo[settings.MONGO_DB_NAME]
+_connector_sessions = _db["connector_sessions"]
+
+_ALLOWED_TRANSPORTS = {"auto", "sse", "http"}
+
+
+def _sanitize_mcp_transport(config):
+    """Normalise and validate the transport_type field.
+
+    Strips ``command`` / ``args`` keys that are only valid for local STDIO
+    transports and returns the cleaned transport type string.
+    """
+    transport_type = (config.get("transport_type") or "auto").lower()
+    if transport_type not in _ALLOWED_TRANSPORTS:
+        raise ValueError(f"Unsupported transport_type: {transport_type}")
+    config.pop("command", None)
+    config.pop("args", None)
+    config["transport_type"] = transport_type
+    return transport_type
+
+
+def _extract_auth_credentials(config):
+    """Build an ``auth_credentials`` dict from the raw MCP config."""
+    auth_credentials = {}
+    auth_type = config.get("auth_type", "none")
+
+    if auth_type == "api_key":
+        if config.get("api_key"):
+            auth_credentials["api_key"] = config["api_key"]
+        if config.get("api_key_header"):
+            auth_credentials["api_key_header"] = config["api_key_header"]
+    elif auth_type == "bearer":
+        if config.get("bearer_token"):
+            auth_credentials["bearer_token"] = config["bearer_token"]
+    elif auth_type == "basic":
+        if config.get("username"):
+            auth_credentials["username"] = config["username"]
+        if config.get("password"):
+            auth_credentials["password"] = config["password"]
+
+    return auth_credentials
+
+
+def _validate_mcp_server_url(config: dict) -> None:
+    """Validate the server_url in an MCP config to prevent SSRF.
+
+    Raises:
+        ValueError: If the URL is missing or points to a blocked address.
+    """
+    server_url = (config.get("server_url") or "").strip()
+    if not server_url:
+        raise ValueError("server_url is required")
+    try:
+        validate_url(server_url)
+    except SSRFError as exc:
+        raise ValueError(f"Invalid server URL: {exc}") from exc
+
 
 @tools_mcp_ns.route("/mcp_server/test")
 class TestMCPServerConfig(Resource):
@@ -43,34 +105,63 @@ class TestMCPServerConfig(Resource):
             return missing_fields
         try:
             config = data["config"]
+            try:
+                _sanitize_mcp_transport(config)
+            except ValueError:
+                return make_response(
+                    jsonify({"success": False, "error": "Unsupported transport_type"}),
+                    400,
+                )
 
-            auth_credentials = {}
-            auth_type = config.get("auth_type", "none")
+            _validate_mcp_server_url(config)
 
-            if auth_type == "api_key" and "api_key" in config:
-                auth_credentials["api_key"] = config["api_key"]
-                if "api_key_header" in config:
-                    auth_credentials["api_key_header"] = config["api_key_header"]
-            elif auth_type == "bearer" and "bearer_token" in config:
-                auth_credentials["bearer_token"] = config["bearer_token"]
-            elif auth_type == "basic":
-                if "username" in config:
-                    auth_credentials["username"] = config["username"]
-                if "password" in config:
-                    auth_credentials["password"] = config["password"]
+            auth_credentials = _extract_auth_credentials(config)
             test_config = config.copy()
             test_config["auth_credentials"] = auth_credentials
 
             mcp_tool = MCPTool(config=test_config, user_id=user)
             result = mcp_tool.test_connection()
 
-            return make_response(jsonify(result), 200)
+            if result.get("requires_oauth"):
+                safe_result = {
+                    k: v
+                    for k, v in result.items()
+                    if k in ("success", "requires_oauth", "auth_url")
+                }
+                return make_response(jsonify(safe_result), 200)
+
+            if not result.get("success"):
+                current_app.logger.error(
+                    f"MCP connection test failed: {result.get('message')}"
+                )
+                return make_response(
+                    jsonify(
+                        {
+                            "success": False,
+                            "message": "Connection test failed",
+                            "tools_count": 0,
+                        }
+                    ),
+                    200,
+                )
+
+            safe_result = {
+                "success": True,
+                "message": result.get("message", "Connection successful"),
+                "tools_count": result.get("tools_count", 0),
+                "tools": result.get("tools", []),
+            }
+            return make_response(jsonify(safe_result), 200)
+        except ValueError as e:
+            current_app.logger.warning(f"Invalid MCP server test request: {e}")
+            return make_response(
+                jsonify({"success": False, "error": "Invalid MCP server configuration"}),
+                400,
+            )
         except Exception as e:
             current_app.logger.error(f"Error testing MCP server: {e}", exc_info=True)
             return make_response(
-                jsonify(
-                    {"success": False, "error": f"Connection test failed: {str(e)}"}
-                ),
+                jsonify({"success": False, "error": "Connection test failed"}),
                 500,
             )
 
@@ -110,22 +201,18 @@ class MCPServerSave(Resource):
             return missing_fields
         try:
             config = data["config"]
+            try:
+                _sanitize_mcp_transport(config)
+            except ValueError:
+                return make_response(
+                    jsonify({"success": False, "error": "Unsupported transport_type"}),
+                    400,
+                )
 
-            auth_credentials = {}
+            _validate_mcp_server_url(config)
+
+            auth_credentials = _extract_auth_credentials(config)
             auth_type = config.get("auth_type", "none")
-            if auth_type == "api_key":
-                if "api_key" in config and config["api_key"]:
-                    auth_credentials["api_key"] = config["api_key"]
-                if "api_key_header" in config:
-                    auth_credentials["api_key_header"] = config["api_key_header"]
-            elif auth_type == "bearer":
-                if "bearer_token" in config and config["bearer_token"]:
-                    auth_credentials["bearer_token"] = config["bearer_token"]
-            elif auth_type == "basic":
-                if "username" in config and config["username"]:
-                    auth_credentials["username"] = config["username"]
-                if "password" in config and config["password"]:
-                    auth_credentials["password"] = config["password"]
             mcp_config = config.copy()
             mcp_config["auth_credentials"] = auth_credentials
 
@@ -163,30 +250,39 @@ class MCPServerSave(Resource):
                     "No valid credentials provided for the selected authentication type"
                 )
             storage_config = config.copy()
+
+            tool_id = data.get("id")
+            existing_encrypted = None
+            if tool_id:
+                existing_doc = user_tools_collection.find_one(
+                    {"_id": ObjectId(tool_id), "user": user, "name": "mcp_tool"}
+                )
+                if existing_doc:
+                    existing_encrypted = existing_doc.get("config", {}).get(
+                        "encrypted_credentials"
+                    )
+
             if auth_credentials:
-                encrypted_credentials_string = encrypt_credentials(
+                if existing_encrypted:
+                    existing_secrets = decrypt_credentials(existing_encrypted, user)
+                    existing_secrets.update(auth_credentials)
+                    auth_credentials = existing_secrets
+                storage_config["encrypted_credentials"] = encrypt_credentials(
                     auth_credentials, user
                 )
-                storage_config["encrypted_credentials"] = encrypted_credentials_string
+            elif existing_encrypted:
+                storage_config["encrypted_credentials"] = existing_encrypted
+
             for field in [
                 "api_key",
                 "bearer_token",
                 "username",
                 "password",
                 "api_key_header",
+                "redirect_uri",
             ]:
                 storage_config.pop(field, None)
-            transformed_actions = []
-            for action in actions_metadata:
-                action["active"] = True
-                if "parameters" in action:
-                    if "properties" in action["parameters"]:
-                        for param_name, param_details in action["parameters"][
-                            "properties"
-                        ].items():
-                            param_details["filled_by_llm"] = True
-                            param_details["value"] = ""
-                transformed_actions.append(action)
+            transformed_actions = transform_actions(actions_metadata)
             tool_data = {
                 "name": "mcp_tool",
                 "displayName": data["displayName"],
@@ -198,7 +294,6 @@ class MCPServerSave(Resource):
                 "user": user,
             }
 
-            tool_id = data.get("id")
             if tool_id:
                 result = user_tools_collection.update_one(
                     {"_id": ObjectId(tool_id), "user": user, "name": "mcp_tool"},
@@ -230,12 +325,16 @@ class MCPServerSave(Resource):
                     "tools_count": len(transformed_actions),
                 }
             return make_response(jsonify(response_data), 200)
+        except ValueError as e:
+            current_app.logger.warning(f"Invalid MCP server save request: {e}")
+            return make_response(
+                jsonify({"success": False, "error": "Invalid MCP server configuration"}),
+                400,
+            )
         except Exception as e:
             current_app.logger.error(f"Error saving MCP server: {e}", exc_info=True)
             return make_response(
-                jsonify(
-                    {"success": False, "error": f"Failed to save MCP server: {str(e)}"}
-                ),
+                jsonify({"success": False, "error": "Failed to save MCP server"}),
                 500,
             )
 
@@ -263,9 +362,12 @@ class MCPOAuthCallback(Resource):
         error = request.args.get("error")
 
         if error:
-            return redirect(
-                f"/api/connectors/callback-status?status=error&message=OAuth+error:+{error}.+Please+try+again+and+make+sure+to+grant+all+requested+permissions,+including+offline+access.&provider=mcp_tool"
-            )
+            params = {
+                "status": "error",
+                "message": f"OAuth error: {error}. Please try again and make sure to grant all requested permissions, including offline access.",
+                "provider": "mcp_tool",
+            }
+            return redirect(f"/api/connectors/callback-status?{urlencode(params)}")
         if not code or not state:
             return redirect(
                 "/api/connectors/callback-status?status=error&message=Authorization+code+or+state+not+provided.+Please+complete+the+authorization+process+and+make+sure+to+grant+offline+access.&provider=mcp_tool"
@@ -276,7 +378,6 @@ class MCPOAuthCallback(Resource):
                 return redirect(
                     "/api/connectors/callback-status?status=error&message=Internal+server+error:+Redis+not+available.&provider=mcp_tool"
                 )
-            code = unquote(code)
             manager = MCPOAuthManager(redis_client)
             success = manager.handle_oauth_callback(state, code, error)
             if success:
@@ -292,17 +393,13 @@ class MCPOAuthCallback(Resource):
                 f"Error handling MCP OAuth callback: {str(e)}", exc_info=True
             )
             return redirect(
-                f"/api/connectors/callback-status?status=error&message=Internal+server+error:+{str(e)}.&provider=mcp_tool"
+                "/api/connectors/callback-status?status=error&message=Internal+server+error.&provider=mcp_tool"
             )
 
 
 @tools_mcp_ns.route("/mcp_server/oauth_status/<string:task_id>")
 class MCPOAuthStatus(Resource):
     def get(self, task_id):
-        """
-        Get current status of OAuth flow.
-        Frontend should poll this endpoint periodically.
-        """
         try:
             redis_client = get_redis_instance()
             status_key = f"mcp_oauth_status:{task_id}"
@@ -310,6 +407,14 @@ class MCPOAuthStatus(Resource):
 
             if status_data:
                 status = json.loads(status_data)
+                if "tools" in status and isinstance(status["tools"], list):
+                    status["tools"] = [
+                        {
+                            "name": t.get("name", "unknown"),
+                            "description": t.get("description", ""),
+                        }
+                        for t in status["tools"]
+                    ]
                 return make_response(
                     jsonify({"success": True, "task_id": task_id, **status})
                 )
@@ -317,17 +422,93 @@ class MCPOAuthStatus(Resource):
                 return make_response(
                     jsonify(
                         {
-                            "success": False,
-                            "error": "Task not found or expired",
+                            "success": True,
                             "task_id": task_id,
+                            "status": "pending",
+                            "message": "Waiting for OAuth to start...",
                         }
                     ),
-                    404,
+                    200,
                 )
         except Exception as e:
             current_app.logger.error(
-                f"Error getting OAuth status for task {task_id}: {str(e)}"
+                f"Error getting OAuth status for task {task_id}: {str(e)}",
+                exc_info=True,
             )
             return make_response(
-                jsonify({"success": False, "error": str(e), "task_id": task_id}), 500
+                jsonify(
+                    {
+                        "success": False,
+                        "error": "Failed to get OAuth status",
+                        "task_id": task_id,
+                    }
+                ),
+                500,
+            )
+
+
+@tools_mcp_ns.route("/mcp_server/auth_status")
+class MCPAuthStatus(Resource):
+    @api.doc(
+        description="Batch check auth status for all MCP tools. "
+        "Lightweight DB-only check — no network calls to MCP servers."
+    )
+    def get(self):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        try:
+            mcp_tools = list(
+                user_tools_collection.find(
+                    {"user": user, "name": "mcp_tool"},
+                    {"_id": 1, "config": 1},
+                )
+            )
+            if not mcp_tools:
+                return make_response(jsonify({"success": True, "statuses": {}}), 200)
+
+            oauth_server_urls = {}
+            statuses = {}
+            for tool in mcp_tools:
+                tool_id = str(tool["_id"])
+                config = tool.get("config", {})
+                auth_type = config.get("auth_type", "none")
+                if auth_type == "oauth":
+                    server_url = config.get("server_url", "")
+                    if server_url:
+                        parsed = urlparse(server_url)
+                        base_url = f"{parsed.scheme}://{parsed.netloc}"
+                        oauth_server_urls[tool_id] = base_url
+                    else:
+                        statuses[tool_id] = "needs_auth"
+                else:
+                    statuses[tool_id] = "configured"
+
+            if oauth_server_urls:
+                unique_urls = list(set(oauth_server_urls.values()))
+                sessions = list(
+                    _connector_sessions.find(
+                        {"user_id": user, "server_url": {"$in": unique_urls}},
+                        {"server_url": 1, "tokens": 1},
+                    )
+                )
+                url_has_tokens = {
+                    doc["server_url"]: bool(doc.get("tokens", {}).get("access_token"))
+                    for doc in sessions
+                }
+                for tool_id, base_url in oauth_server_urls.items():
+                    if url_has_tokens.get(base_url):
+                        statuses[tool_id] = "connected"
+                    else:
+                        statuses[tool_id] = "needs_auth"
+
+            return make_response(jsonify({"success": True, "statuses": statuses}), 200)
+        except Exception as e:
+            current_app.logger.error(
+                "Error checking MCP auth status: %s", e, exc_info=True
+            )
+            return make_response(
+                jsonify({"success": False, "error": "Failed to check auth status"}),
+                500,
             )

application/api/user/tools/routes.py

@@ -4,9 +4,13 @@ from bson.objectid import ObjectId
 from flask import current_app, jsonify, make_response, request
 from flask_restx import fields, Namespace, Resource
 
+from application.agents.tools.spec_parser import parse_spec
 from application.agents.tools.tool_manager import ToolManager
 from application.api import api
 from application.api.user.base import user_tools_collection
+from application.core.url_validation import SSRFError, validate_url
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.user_tools import UserToolsRepository
 from application.security.encryption import decrypt_credentials, encrypt_credentials
 from application.utils import check_required_fields, validate_function_name
 
@@ -14,6 +18,114 @@ tool_config = {}
 tool_manager = ToolManager(config=tool_config)
 
 
+def _encrypt_secret_fields(config, config_requirements, user_id):
+    secret_keys = [
+        key for key, spec in config_requirements.items()
+        if spec.get("secret") and key in config and config[key]
+    ]
+    if not secret_keys:
+        return config
+
+    storage_config = config.copy()
+    secret_values = {k: config[k] for k in secret_keys}
+    storage_config["encrypted_credentials"] = encrypt_credentials(secret_values, user_id)
+    for key in secret_keys:
+        storage_config.pop(key, None)
+    return storage_config
+
+
+def _validate_config(config, config_requirements, has_existing_secrets=False):
+    errors = {}
+    for key, spec in config_requirements.items():
+        depends_on = spec.get("depends_on")
+        if depends_on:
+            if not all(config.get(dk) == dv for dk, dv in depends_on.items()):
+                continue
+        if spec.get("required") and not config.get(key):
+            if has_existing_secrets and spec.get("secret"):
+                continue
+            errors[key] = f"{spec.get('label', key)} is required"
+        value = config.get(key)
+        if value is not None and value != "":
+            if spec.get("type") == "number":
+                try:
+                    num = float(value)
+                    if key == "timeout" and (num < 1 or num > 300):
+                        errors[key] = "Timeout must be between 1 and 300"
+                except (ValueError, TypeError):
+                    errors[key] = f"{spec.get('label', key)} must be a number"
+            if spec.get("enum") and value not in spec["enum"]:
+                errors[key] = f"Invalid value for {spec.get('label', key)}"
+    return errors
+
+
+def _merge_secrets_on_update(new_config, existing_config, config_requirements, user_id):
+    """Merge incoming config with existing encrypted secrets and re-encrypt.
+
+    For updates, the client may omit unchanged secret values.  This helper
+    decrypts any previously stored secrets, overlays whatever the client *did*
+    send, strips plain-text secrets from the stored config, and re-encrypts
+    the merged result.
+
+    Returns the final ``config`` dict ready for persistence.
+    """
+    secret_keys = [
+        key for key, spec in config_requirements.items()
+        if spec.get("secret")
+    ]
+
+    if not secret_keys:
+        return new_config
+
+    existing_secrets = {}
+    if "encrypted_credentials" in existing_config:
+        existing_secrets = decrypt_credentials(
+            existing_config["encrypted_credentials"], user_id
+        )
+
+    merged_secrets = existing_secrets.copy()
+    for key in secret_keys:
+        if key in new_config and new_config[key]:
+            merged_secrets[key] = new_config[key]
+
+    # Start from existing non-secret values, then overlay incoming non-secrets
+    storage_config = {
+        k: v for k, v in existing_config.items()
+        if k not in secret_keys and k != "encrypted_credentials"
+    }
+    storage_config.update(
+        {k: v for k, v in new_config.items() if k not in secret_keys}
+    )
+
+    if merged_secrets:
+        storage_config["encrypted_credentials"] = encrypt_credentials(
+            merged_secrets, user_id
+        )
+    else:
+        storage_config.pop("encrypted_credentials", None)
+
+    storage_config.pop("has_encrypted_credentials", None)
+    return storage_config
+
+
+def transform_actions(actions_metadata):
+    """Set default flags on action metadata for storage.
+
+    Marks each action as active, sets ``filled_by_llm`` and ``value`` on every
+    parameter property. Used by both the generic create_tool and MCP save routes.
+    """
+    transformed = []
+    for action in actions_metadata:
+        action["active"] = True
+        if "parameters" in action:
+            props = action["parameters"].get("properties", {})
+            for param_details in props.values():
+                param_details["filled_by_llm"] = True
+                param_details["value"] = ""
+        transformed.append(action)
+    return transformed
+
+
 tools_ns = Namespace("tools", description="Tool management operations", path="/api")
 
 
@@ -21,6 +133,8 @@ tools_ns = Namespace("tools", description="Tool management operations", path="/a
 class AvailableTools(Resource):
     @api.doc(description="Get available tools for a user")
     def get(self):
+        if not request.decoded_token:
+            return make_response(jsonify({"success": False}), 401)
         try:
             tools_metadata = []
             for tool_name, tool_instance in tool_manager.tools.items():
@@ -28,12 +142,15 @@ class AvailableTools(Resource):
                 lines = doc.split("\n", 1)
                 name = lines[0].strip()
                 description = lines[1].strip() if len(lines) > 1 else ""
+                config_req = tool_instance.get_config_requirements()
+                actions = tool_instance.get_actions_metadata()
                 tools_metadata.append(
                     {
                         "name": tool_name,
                         "displayName": name,
                         "description": description,
-                        "configRequirements": tool_instance.get_config_requirements(),
+                        "configRequirements": config_req,
+                        "actions": actions,
                     }
                 )
         except Exception as err:
@@ -59,6 +176,21 @@ class GetTools(Resource):
                 tool_copy = {**tool}
                 tool_copy["id"] = str(tool["_id"])
                 tool_copy.pop("_id", None)
+
+                config_req = tool_copy.get("configRequirements", {})
+                if not config_req:
+                    tool_instance = tool_manager.tools.get(tool_copy.get("name"))
+                    if tool_instance:
+                        config_req = tool_instance.get_config_requirements()
+                        tool_copy["configRequirements"] = config_req
+
+                has_secrets = any(
+                    spec.get("secret") for spec in config_req.values()
+                ) if config_req else False
+                if has_secrets and "encrypted_credentials" in tool_copy.get("config", {}):
+                    tool_copy["config"]["has_encrypted_credentials"] = True
+                    tool_copy["config"].pop("encrypted_credentials", None)
+
                 user_tools.append(tool_copy)
         except Exception as err:
             current_app.logger.error(f"Error getting user tools: {err}", exc_info=True)
@@ -109,29 +241,48 @@ class CreateTool(Resource):
         if missing_fields:
             return missing_fields
         try:
+            if data["name"] == "mcp_tool":
+                server_url = (data.get("config", {}).get("server_url") or "").strip()
+                if server_url:
+                    try:
+                        validate_url(server_url)
+                    except SSRFError:
+                        return make_response(
+                            jsonify({"success": False, "message": "Invalid server URL"}),
+                            400,
+                        )
             tool_instance = tool_manager.tools.get(data["name"])
             if not tool_instance:
                 return make_response(
                     jsonify({"success": False, "message": "Tool not found"}), 404
                 )
             actions_metadata = tool_instance.get_actions_metadata()
-            transformed_actions = []
-            for action in actions_metadata:
-                action["active"] = True
-                if "parameters" in action:
-                    if "properties" in action["parameters"]:
-                        for param_name, param_details in action["parameters"][
-                            "properties"
-                        ].items():
-                            param_details["filled_by_llm"] = True
-                            param_details["value"] = ""
-                transformed_actions.append(action)
+            transformed_actions = transform_actions(actions_metadata)
         except Exception as err:
             current_app.logger.error(
                 f"Error getting tool actions: {err}", exc_info=True
             )
             return make_response(jsonify({"success": False}), 400)
         try:
+            config_requirements = tool_instance.get_config_requirements()
+            if config_requirements:
+                validation_errors = _validate_config(
+                    data["config"], config_requirements
+                )
+                if validation_errors:
+                    return make_response(
+                        jsonify(
+                            {
+                                "success": False,
+                                "message": "Validation failed",
+                                "errors": validation_errors,
+                            }
+                        ),
+                        400,
+                    )
+            storage_config = _encrypt_secret_fields(
+                data["config"], config_requirements, user
+            )
             new_tool = {
                 "user": user,
                 "name": data["name"],
@@ -139,11 +290,19 @@ class CreateTool(Resource):
                 "description": data["description"],
                 "customName": data.get("customName", ""),
                 "actions": transformed_actions,
-                "config": data["config"],
+                "config": storage_config,
+                "configRequirements": config_requirements,
                 "status": data["status"],
             }
             resp = user_tools_collection.insert_one(new_tool)
             new_id = str(resp.inserted_id)
+            dual_write(
+                UserToolsRepository,
+                lambda repo, u=user, t=new_tool: repo.create(
+                    u, t["name"], config=t.get("config"),
+                    custom_name=t.get("customName"), display_name=t.get("displayName"),
+                ),
+            )
         except Exception as err:
             current_app.logger.error(f"Error creating tool: {err}", exc_info=True)
             return make_response(jsonify({"success": False}), 400)
@@ -209,57 +368,37 @@ class UpdateTool(Resource):
                 tool_doc = user_tools_collection.find_one(
                     {"_id": ObjectId(data["id"]), "user": user}
                 )
-                if tool_doc and tool_doc.get("name") == "mcp_tool":
-                    config = data["config"]
-                    existing_config = tool_doc.get("config", {})
-                    storage_config = existing_config.copy()
+                if not tool_doc:
+                    return make_response(
+                        jsonify({"success": False, "message": "Tool not found"}),
+                        404,
+                    )
+                tool_name = tool_doc.get("name", data.get("name"))
+                tool_instance = tool_manager.tools.get(tool_name)
+                config_requirements = (
+                    tool_instance.get_config_requirements() if tool_instance else {}
+                )
+                existing_config = tool_doc.get("config", {})
+                has_existing_secrets = "encrypted_credentials" in existing_config
 
-                    storage_config.update(config)
-                    existing_credentials = {}
-                    if "encrypted_credentials" in existing_config:
-                        existing_credentials = decrypt_credentials(
-                            existing_config["encrypted_credentials"], user
+                if config_requirements:
+                    validation_errors = _validate_config(
+                        data["config"], config_requirements,
+                        has_existing_secrets=has_existing_secrets,
+                    )
+                    if validation_errors:
+                        return make_response(
+                            jsonify({
+                                "success": False,
+                                "message": "Validation failed",
+                                "errors": validation_errors,
+                            }),
+                            400,
                         )
-                    auth_credentials = existing_credentials.copy()
-                    auth_type = storage_config.get("auth_type", "none")
-                    if auth_type == "api_key":
-                        if "api_key" in config and config["api_key"]:
-                            auth_credentials["api_key"] = config["api_key"]
-                        if "api_key_header" in config:
-                            auth_credentials["api_key_header"] = config[
-                                "api_key_header"
-                            ]
-                    elif auth_type == "bearer":
-                        if "bearer_token" in config and config["bearer_token"]:
-                            auth_credentials["bearer_token"] = config["bearer_token"]
-                        elif "encrypted_token" in config and config["encrypted_token"]:
-                            auth_credentials["bearer_token"] = config["encrypted_token"]
-                    elif auth_type == "basic":
-                        if "username" in config and config["username"]:
-                            auth_credentials["username"] = config["username"]
-                        if "password" in config and config["password"]:
-                            auth_credentials["password"] = config["password"]
-                    if auth_type != "none" and auth_credentials:
-                        encrypted_credentials_string = encrypt_credentials(
-                            auth_credentials, user
-                        )
-                        storage_config["encrypted_credentials"] = (
-                            encrypted_credentials_string
-                        )
-                    elif auth_type == "none":
-                        storage_config.pop("encrypted_credentials", None)
-                    for field in [
-                        "api_key",
-                        "bearer_token",
-                        "encrypted_token",
-                        "username",
-                        "password",
-                        "api_key_header",
-                    ]:
-                        storage_config.pop(field, None)
-                    update_data["config"] = storage_config
-                else:
-                    update_data["config"] = data["config"]
+
+                update_data["config"] = _merge_secrets_on_update(
+                    data["config"], existing_config, config_requirements, user
+                )
             if "status" in data:
                 update_data["status"] = data["status"]
             user_tools_collection.update_one(
@@ -297,9 +436,52 @@ class UpdateToolConfig(Resource):
         if missing_fields:
             return missing_fields
         try:
+            tool_doc = user_tools_collection.find_one(
+                {"_id": ObjectId(data["id"]), "user": user}
+            )
+            if not tool_doc:
+                return make_response(jsonify({"success": False}), 404)
+
+            tool_name = tool_doc.get("name")
+            if tool_name == "mcp_tool":
+                server_url = (data["config"].get("server_url") or "").strip()
+                if server_url:
+                    try:
+                        validate_url(server_url)
+                    except SSRFError:
+                        return make_response(
+                            jsonify({"success": False, "message": "Invalid server URL"}),
+                            400,
+                        )
+            tool_instance = tool_manager.tools.get(tool_name)
+            config_requirements = (
+                tool_instance.get_config_requirements() if tool_instance else {}
+            )
+            existing_config = tool_doc.get("config", {})
+            has_existing_secrets = "encrypted_credentials" in existing_config
+
+            if config_requirements:
+                validation_errors = _validate_config(
+                    data["config"], config_requirements,
+                    has_existing_secrets=has_existing_secrets,
+                )
+                if validation_errors:
+                    return make_response(
+                        jsonify({
+                            "success": False,
+                            "message": "Validation failed",
+                            "errors": validation_errors,
+                        }),
+                        400,
+                    )
+
+            final_config = _merge_secrets_on_update(
+                data["config"], existing_config, config_requirements, user
+            )
+
             user_tools_collection.update_one(
                 {"_id": ObjectId(data["id"]), "user": user},
-                {"$set": {"config": data["config"]}},
+                {"$set": {"config": final_config}},
             )
         except Exception as err:
             current_app.logger.error(
@@ -408,9 +590,147 @@ class DeleteTool(Resource):
             result = user_tools_collection.delete_one(
                 {"_id": ObjectId(data["id"]), "user": user}
             )
+            dual_write(
+                UserToolsRepository,
+                lambda repo, tid=data["id"], u=user: repo.delete(tid, u),
+            )
             if result.deleted_count == 0:
-                return {"success": False, "message": "Tool not found"}, 404
+                return make_response(
+                    jsonify({"success": False, "message": "Tool not found"}), 404
+                )
         except Exception as err:
             current_app.logger.error(f"Error deleting tool: {err}", exc_info=True)
-            return {"success": False}, 400
-        return {"success": True}, 200
+            return make_response(jsonify({"success": False}), 400)
+        return make_response(jsonify({"success": True}), 200)
+
+
+@tools_ns.route("/parse_spec")
+class ParseSpec(Resource):
+    @api.doc(
+        description="Parse an API specification (OpenAPI 3.x or Swagger 2.0) and return actions"
+    )
+    def post(self):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        if "file" in request.files:
+            file = request.files["file"]
+            if not file.filename:
+                return make_response(
+                    jsonify({"success": False, "message": "No file selected"}), 400
+                )
+            try:
+                spec_content = file.read().decode("utf-8")
+            except UnicodeDecodeError:
+                return make_response(
+                    jsonify({"success": False, "message": "Invalid file encoding"}), 400
+                )
+        elif request.is_json:
+            data = request.get_json()
+            spec_content = data.get("spec_content", "")
+        else:
+            return make_response(
+                jsonify({"success": False, "message": "No spec provided"}), 400
+            )
+        if not spec_content or not spec_content.strip():
+            return make_response(
+                jsonify({"success": False, "message": "Empty spec content"}), 400
+            )
+        try:
+            metadata, actions = parse_spec(spec_content)
+            return make_response(
+                jsonify(
+                    {
+                        "success": True,
+                        "metadata": metadata,
+                        "actions": actions,
+                    }
+                ),
+                200,
+            )
+        except ValueError as e:
+            current_app.logger.error(f"Spec validation error: {e}")
+            return make_response(jsonify({"success": False, "error": "Invalid specification format"}), 400)
+        except Exception as err:
+            current_app.logger.error(f"Error parsing spec: {err}", exc_info=True)
+            return make_response(jsonify({"success": False, "error": "Failed to parse specification"}), 500)
+
+
+@tools_ns.route("/artifact/<artifact_id>")
+class GetArtifact(Resource):
+    @api.doc(description="Get artifact data by artifact ID. Returns all todos for the tool when fetching a todo artifact.")
+    def get(self, artifact_id: str):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user_id = decoded_token.get("sub")
+
+        try:
+            obj_id = ObjectId(artifact_id)
+        except Exception:
+            return make_response(
+                jsonify({"success": False, "message": "Invalid artifact ID"}), 400
+            )
+
+        from application.core.mongo_db import MongoDB
+        from application.core.settings import settings
+
+        db = MongoDB.get_client()[settings.MONGO_DB_NAME]
+
+        note_doc = db["notes"].find_one({"_id": obj_id, "user_id": user_id})
+        if note_doc:
+            content = note_doc.get("note", "")
+            line_count = len(content.split("\n")) if content else 0
+            artifact = {
+                "artifact_type": "note",
+                "data": {
+                    "content": content,
+                    "line_count": line_count,
+                    "updated_at": (
+                        note_doc["updated_at"].isoformat()
+                        if note_doc.get("updated_at")
+                        else None
+                    ),
+                },
+            }
+            return make_response(jsonify({"success": True, "artifact": artifact}), 200)
+
+        todo_doc = db["todos"].find_one({"_id": obj_id, "user_id": user_id})
+        if todo_doc:
+            tool_id = todo_doc.get("tool_id")
+            query = {"user_id": user_id, "tool_id": tool_id}
+            all_todos = list(db["todos"].find(query))
+            items = []
+            open_count = 0
+            completed_count = 0
+            for t in all_todos:
+                status = t.get("status", "open")
+                if status == "open":
+                    open_count += 1
+                elif status == "completed":
+                    completed_count += 1
+                items.append({
+                    "todo_id": t.get("todo_id"),
+                    "title": t.get("title", ""),
+                    "status": status,
+                    "created_at": (
+                        t["created_at"].isoformat() if t.get("created_at") else None
+                    ),
+                    "updated_at": (
+                        t["updated_at"].isoformat() if t.get("updated_at") else None
+                    ),
+                })
+            artifact = {
+                "artifact_type": "todo_list",
+                "data": {
+                    "items": items,
+                    "total_count": len(items),
+                    "open_count": open_count,
+                    "completed_count": completed_count,
+                },
+            }
+            return make_response(jsonify({"success": True, "artifact": artifact}), 200)
+
+        return make_response(
+            jsonify({"success": False, "message": "Artifact not found"}), 404
+        )

application/api/user/utils.py

@@ -0,0 +1,387 @@
+"""Centralized utilities for API routes."""
+
+from functools import wraps
+from typing import Any, Callable, Dict, List, Optional, Tuple
+
+from bson.errors import InvalidId
+from bson.objectid import ObjectId
+from flask import (
+    Response,
+    current_app,
+    has_app_context,
+    jsonify,
+    make_response,
+    request,
+)
+from pymongo.collection import Collection
+
+
+def get_user_id() -> Optional[str]:
+    """
+    Extract user ID from decoded JWT token.
+
+    Returns:
+        User ID string or None if not authenticated
+    """
+    decoded_token = getattr(request, "decoded_token", None)
+    return decoded_token.get("sub") if decoded_token else None
+
+
+def require_auth(func: Callable) -> Callable:
+    """
+    Decorator to require authentication for route handlers.
+
+    Usage:
+        @require_auth
+        def get(self):
+            user_id = get_user_id()
+            ...
+    """
+
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        user_id = get_user_id()
+        if not user_id:
+            return error_response("Unauthorized", 401)
+        return func(*args, **kwargs)
+
+    return wrapper
+
+
+def success_response(
+    data: Optional[Dict[str, Any]] = None, status: int = 200
+) -> Response:
+    """
+    Create a standardized success response.
+
+    Args:
+        data: Optional data dictionary to include in response
+        status: HTTP status code (default: 200)
+
+    Returns:
+        Flask Response object
+
+    Example:
+        return success_response({"users": [...], "total": 10})
+    """
+    response = {"success": True}
+    if data:
+        response.update(data)
+    return make_response(jsonify(response), status)
+
+
+def error_response(message: str, status: int = 400, **kwargs) -> Response:
+    """
+    Create a standardized error response.
+
+    Args:
+        message: Error message string
+        status: HTTP status code (default: 400)
+        **kwargs: Additional fields to include in response
+
+    Returns:
+        Flask Response object
+
+    Example:
+        return error_response("Resource not found", 404)
+        return error_response("Invalid input", 400, errors=["field1", "field2"])
+    """
+    response = {"success": False, "message": message}
+    response.update(kwargs)
+    return make_response(jsonify(response), status)
+
+
+def validate_object_id(
+    id_string: str, resource_name: str = "Resource"
+) -> Tuple[Optional[ObjectId], Optional[Response]]:
+    """
+    Validate and convert string to ObjectId.
+
+    Args:
+        id_string: String to convert
+        resource_name: Name of resource for error message
+
+    Returns:
+        Tuple of (ObjectId or None, error_response or None)
+
+    Example:
+        obj_id, error = validate_object_id(workflow_id, "Workflow")
+        if error:
+            return error
+    """
+    try:
+        return ObjectId(id_string), None
+    except (InvalidId, TypeError):
+        return None, error_response(f"Invalid {resource_name} ID format")
+
+
+def validate_pagination(
+    default_limit: int = 20, max_limit: int = 100
+) -> Tuple[int, int, Optional[Response]]:
+    """
+    Extract and validate pagination parameters from request.
+
+    Args:
+        default_limit: Default items per page
+        max_limit: Maximum allowed items per page
+
+    Returns:
+        Tuple of (limit, skip, error_response or None)
+
+    Example:
+        limit, skip, error = validate_pagination()
+        if error:
+            return error
+    """
+    try:
+        limit = min(int(request.args.get("limit", default_limit)), max_limit)
+        skip = int(request.args.get("skip", 0))
+        if limit < 1 or skip < 0:
+            return 0, 0, error_response("Invalid pagination parameters")
+        return limit, skip, None
+    except ValueError:
+        return 0, 0, error_response("Invalid pagination parameters")
+
+
+def check_resource_ownership(
+    collection: Collection,
+    resource_id: ObjectId,
+    user_id: str,
+    resource_name: str = "Resource",
+) -> Tuple[Optional[Dict], Optional[Response]]:
+    """
+    Check if resource exists and belongs to user.
+
+    Args:
+        collection: MongoDB collection
+        resource_id: Resource ObjectId
+        user_id: User ID string
+        resource_name: Name of resource for error messages
+
+    Returns:
+        Tuple of (resource_dict or None, error_response or None)
+
+    Example:
+        workflow, error = check_resource_ownership(
+            workflows_collection,
+            workflow_id,
+            user_id,
+            "Workflow"
+        )
+        if error:
+            return error
+    """
+    resource = collection.find_one({"_id": resource_id, "user": user_id})
+    if not resource:
+        return None, error_response(f"{resource_name} not found", 404)
+    return resource, None
+
+
+def serialize_object_id(
+    obj: Dict[str, Any], id_field: str = "_id", new_field: str = "id"
+) -> Dict[str, Any]:
+    """
+    Convert ObjectId to string in a dictionary.
+
+    Args:
+        obj: Dictionary containing ObjectId
+        id_field: Field name containing ObjectId
+        new_field: New field name for string ID
+
+    Returns:
+        Modified dictionary
+
+    Example:
+        user = serialize_object_id(user_doc)
+        # user["id"] = "507f1f77bcf86cd799439011"
+    """
+    if id_field in obj:
+        obj[new_field] = str(obj[id_field])
+        if id_field != new_field:
+            obj.pop(id_field, None)
+    return obj
+
+
+def serialize_list(items: List[Dict], serializer: Callable[[Dict], Dict]) -> List[Dict]:
+    """
+    Apply serializer function to list of items.
+
+    Args:
+        items: List of dictionaries
+        serializer: Function to apply to each item
+
+    Returns:
+        List of serialized items
+
+    Example:
+        workflows = serialize_list(workflow_docs, serialize_workflow)
+    """
+    return [serializer(item) for item in items]
+
+
+def paginated_response(
+    collection: Collection,
+    query: Dict[str, Any],
+    serializer: Callable[[Dict], Dict],
+    limit: int,
+    skip: int,
+    sort_field: str = "created_at",
+    sort_order: int = -1,
+    response_key: str = "items",
+) -> Response:
+    """
+    Create paginated response for collection query.
+
+    Args:
+        collection: MongoDB collection
+        query: Query dictionary
+        serializer: Function to serialize each item
+        limit: Items per page
+        skip: Number of items to skip
+        sort_field: Field to sort by
+        sort_order: Sort order (1=asc, -1=desc)
+        response_key: Key name for items in response
+
+    Returns:
+        Flask Response with paginated data
+
+    Example:
+        return paginated_response(
+            workflows_collection,
+            {"user": user_id},
+            serialize_workflow,
+            limit, skip,
+            response_key="workflows"
+        )
+    """
+    items = list(
+        collection.find(query).sort(sort_field, sort_order).skip(skip).limit(limit)
+    )
+    total = collection.count_documents(query)
+
+    return success_response(
+        {
+            response_key: serialize_list(items, serializer),
+            "total": total,
+            "limit": limit,
+            "skip": skip,
+        }
+    )
+
+
+def require_fields(required: List[str]) -> Callable:
+    """
+    Decorator to validate required fields in request JSON.
+
+    Args:
+        required: List of required field names
+
+    Returns:
+        Decorator function
+
+    Example:
+        @require_fields(["name", "description"])
+        def post(self):
+            data = request.get_json()
+            ...
+    """
+
+    def decorator(func: Callable) -> Callable:
+        @wraps(func)
+        def wrapper(*args, **kwargs):
+            data = request.get_json()
+            if not data:
+                return error_response("Request body required")
+            missing = [field for field in required if not data.get(field)]
+            if missing:
+                return error_response(f"Missing required fields: {', '.join(missing)}")
+            return func(*args, **kwargs)
+
+        return wrapper
+
+    return decorator
+
+
+def safe_db_operation(
+    operation: Callable, error_message: str = "Database operation failed"
+) -> Tuple[Any, Optional[Response]]:
+    """
+    Safely execute database operation with error handling.
+
+    Args:
+        operation: Function to execute
+        error_message: Error message if operation fails
+
+    Returns:
+        Tuple of (result or None, error_response or None)
+
+    Example:
+        result, error = safe_db_operation(
+            lambda: collection.insert_one(doc),
+            "Failed to create resource"
+        )
+        if error:
+            return error
+    """
+    try:
+        result = operation()
+        return result, None
+    except Exception as err:
+        if has_app_context():
+            current_app.logger.error(f"{error_message}: {err}", exc_info=True)
+        return None, error_response(error_message)
+
+
+def validate_enum(
+    value: Any, allowed: List[Any], field_name: str
+) -> Optional[Response]:
+    """
+    Validate that value is in allowed list.
+
+    Args:
+        value: Value to validate
+        allowed: List of allowed values
+        field_name: Field name for error message
+
+    Returns:
+        error_response if invalid, None if valid
+
+    Example:
+        error = validate_enum(status, ["draft", "published"], "status")
+        if error:
+            return error
+    """
+    if value not in allowed:
+        allowed_str = ", ".join(f"'{v}'" for v in allowed)
+        return error_response(f"Invalid {field_name}. Must be one of: {allowed_str}")
+    return None
+
+
+def extract_sort_params(
+    default_field: str = "created_at",
+    default_order: str = "desc",
+    allowed_fields: Optional[List[str]] = None,
+) -> Tuple[str, int]:
+    """
+    Extract and validate sort parameters from request.
+
+    Args:
+        default_field: Default sort field
+        default_order: Default sort order ("asc" or "desc")
+        allowed_fields: List of allowed sort fields (None = no validation)
+
+    Returns:
+        Tuple of (sort_field, sort_order)
+
+    Example:
+        sort_field, sort_order = extract_sort_params(
+            allowed_fields=["name", "date", "status"]
+        )
+    """
+    sort_field = request.args.get("sort", default_field)
+    sort_order_str = request.args.get("order", default_order).lower()
+
+    if allowed_fields and sort_field not in allowed_fields:
+        sort_field = default_field
+    sort_order = -1 if sort_order_str == "desc" else 1
+    return sort_field, sort_order

application/api/user/workflows/__init__.py

@@ -0,0 +1,3 @@
+from .routes import workflows_ns
+
+__all__ = ["workflows_ns"]

application/api/user/workflows/routes.py

@@ -0,0 +1,745 @@
+"""Workflow management routes."""
+
+from datetime import datetime, timezone
+from typing import Any, Dict, List, Optional, Set
+
+from flask import current_app, request
+from flask_restx import Namespace, Resource
+
+from application.api.user.base import (
+    workflow_edges_collection,
+    workflow_nodes_collection,
+    workflows_collection,
+)
+from application.storage.db.dual_write import dual_write
+from application.storage.db.repositories.workflow_edges import WorkflowEdgesRepository
+from application.storage.db.repositories.workflow_nodes import WorkflowNodesRepository
+from application.storage.db.repositories.workflows import WorkflowsRepository
+from application.core.json_schema_utils import (
+    JsonSchemaValidationError,
+    normalize_json_schema_payload,
+)
+from application.core.model_utils import get_model_capabilities
+from application.api.user.utils import (
+    check_resource_ownership,
+    error_response,
+    get_user_id,
+    require_auth,
+    require_fields,
+    safe_db_operation,
+    success_response,
+    validate_object_id,
+)
+
+workflows_ns = Namespace("workflows", path="/api")
+
+
+def _workflow_error_response(message: str, err: Exception):
+    current_app.logger.error(f"{message}: {err}", exc_info=True)
+    return error_response(message)
+
+
+# ---------------------------------------------------------------------------
+# Postgres dual-write helpers
+#
+# Workflows are unusual relative to other Phase 3 tables: a single user
+# action (create / update) writes to three collections in concert
+# (workflows + workflow_nodes + workflow_edges) and the edges reference
+# nodes by user-provided string ids. The Postgres mirror needs to:
+#
+# 1. Run all three writes inside one PG transaction (so the just-created
+#    nodes are visible when we resolve their UUIDs for the edge insert).
+# 2. Translate edge source_id/target_id strings → workflow_nodes.id UUIDs
+#    after the bulk_create returns them.
+#
+# Each helper opens exactly one ``dual_write`` call (one PG txn) and uses
+# the connection from whichever repo it was instantiated with to spin up
+# any sibling repos it needs.
+# ---------------------------------------------------------------------------
+
+
+def _dual_write_workflow_create(
+    mongo_workflow_id: str,
+    user_id: str,
+    name: str,
+    description: str,
+    nodes_data: List[Dict],
+    edges_data: List[Dict],
+    graph_version: int = 1,
+) -> None:
+    """Mirror a Mongo workflow create into Postgres."""
+
+    def _do(repo: WorkflowsRepository) -> None:
+        conn = repo._conn
+        wf = repo.create(
+            user_id,
+            name,
+            description=description,
+            legacy_mongo_id=mongo_workflow_id,
+        )
+        _write_graph(conn, wf["id"], graph_version, nodes_data, edges_data)
+
+    dual_write(WorkflowsRepository, _do)
+
+
+def _dual_write_workflow_update(
+    mongo_workflow_id: str,
+    user_id: str,
+    name: str,
+    description: str,
+    nodes_data: List[Dict],
+    edges_data: List[Dict],
+    next_graph_version: int,
+) -> None:
+    """Mirror a Mongo workflow update into Postgres.
+
+    Mirrors the Mongo route: insert the new graph_version's nodes/edges,
+    bump the workflow's name/description/current_graph_version, then drop
+    every other graph_version's nodes/edges.
+    """
+
+    def _do(repo: WorkflowsRepository) -> None:
+        conn = repo._conn
+        wf = _resolve_pg_workflow(conn, mongo_workflow_id)
+        if wf is None:
+            return
+        _write_graph(conn, wf["id"], next_graph_version, nodes_data, edges_data)
+        repo.update(wf["id"], user_id, {
+            "name": name,
+            "description": description,
+            "current_graph_version": next_graph_version,
+        })
+        WorkflowNodesRepository(conn).delete_other_versions(
+            wf["id"], next_graph_version,
+        )
+        WorkflowEdgesRepository(conn).delete_other_versions(
+            wf["id"], next_graph_version,
+        )
+
+    dual_write(WorkflowsRepository, _do)
+
+
+def _dual_write_workflow_delete(mongo_workflow_id: str, user_id: str) -> None:
+    """Mirror a Mongo workflow delete into Postgres.
+
+    The CASCADE on workflows.id → workflow_nodes/workflow_edges takes
+    care of the children automatically.
+    """
+
+    def _do(repo: WorkflowsRepository) -> None:
+        wf = _resolve_pg_workflow(repo._conn, mongo_workflow_id)
+        if wf is not None:
+            repo.delete(wf["id"], user_id)
+
+    dual_write(WorkflowsRepository, _do)
+
+
+def _resolve_pg_workflow(conn, mongo_workflow_id: str) -> Optional[Dict]:
+    """Look up a Postgres workflow by its Mongo ObjectId string."""
+    from sqlalchemy import text as _text
+    row = conn.execute(
+        _text("SELECT id FROM workflows WHERE legacy_mongo_id = :legacy_id"),
+        {"legacy_id": mongo_workflow_id},
+    ).fetchone()
+    return {"id": str(row[0])} if row else None
+
+
+def _write_graph(
+    conn,
+    pg_workflow_id: str,
+    graph_version: int,
+    nodes_data: List[Dict],
+    edges_data: List[Dict],
+) -> None:
+    """Bulk-create nodes + edges for one graph version inside one txn.
+
+    Edges arrive with source/target as user-provided node-id strings
+    (the same shape the Mongo route stores). We bulk-insert nodes first,
+    capture their ``node_id → UUID`` map from the returned rows, then
+    translate edge source/target strings to those UUIDs before the edge
+    bulk insert. Edges referencing missing nodes are dropped (logged).
+    """
+    nodes_repo = WorkflowNodesRepository(conn)
+    edges_repo = WorkflowEdgesRepository(conn)
+
+    if nodes_data:
+        created_nodes = nodes_repo.bulk_create(
+            pg_workflow_id, graph_version,
+            [
+                {
+                    "node_id": n["id"],
+                    "node_type": n["type"],
+                    "title": n.get("title", ""),
+                    "description": n.get("description", ""),
+                    "position": n.get("position", {"x": 0, "y": 0}),
+                    "config": n.get("data", {}),
+                    "legacy_mongo_id": n.get("legacy_mongo_id"),
+                }
+                for n in nodes_data
+            ],
+        )
+        node_uuid_by_str = {n["node_id"]: n["id"] for n in created_nodes}
+    else:
+        node_uuid_by_str = {}
+
+    if edges_data:
+        translated_edges: List[Dict] = []
+        for e in edges_data:
+            src = e.get("source")
+            tgt = e.get("target")
+            from_uuid = node_uuid_by_str.get(src)
+            to_uuid = node_uuid_by_str.get(tgt)
+            if not from_uuid or not to_uuid:
+                current_app.logger.warning(
+                    "PG dual-write: dropping edge %s; node refs unresolved "
+                    "(source=%s, target=%s)",
+                    e.get("id"), src, tgt,
+                )
+                continue
+            translated_edges.append({
+                "edge_id": e["id"],
+                "from_node_id": from_uuid,
+                "to_node_id": to_uuid,
+                "source_handle": e.get("sourceHandle"),
+                "target_handle": e.get("targetHandle"),
+            })
+        if translated_edges:
+            edges_repo.bulk_create(pg_workflow_id, graph_version, translated_edges)
+
+
+def serialize_workflow(w: Dict) -> Dict:
+    """Serialize workflow document to API response format."""
+    return {
+        "id": str(w["_id"]),
+        "name": w.get("name"),
+        "description": w.get("description"),
+        "created_at": w["created_at"].isoformat() if w.get("created_at") else None,
+        "updated_at": w["updated_at"].isoformat() if w.get("updated_at") else None,
+    }
+
+
+def serialize_node(n: Dict) -> Dict:
+    """Serialize workflow node document to API response format."""
+    return {
+        "id": n["id"],
+        "type": n["type"],
+        "title": n.get("title"),
+        "description": n.get("description"),
+        "position": n.get("position"),
+        "data": n.get("config", {}),
+    }
+
+
+def serialize_edge(e: Dict) -> Dict:
+    """Serialize workflow edge document to API response format."""
+    return {
+        "id": e["id"],
+        "source": e.get("source_id"),
+        "target": e.get("target_id"),
+        "sourceHandle": e.get("source_handle"),
+        "targetHandle": e.get("target_handle"),
+    }
+
+
+def get_workflow_graph_version(workflow: Dict) -> int:
+    """Get current graph version with legacy fallback."""
+    raw_version = workflow.get("current_graph_version", 1)
+    try:
+        version = int(raw_version)
+        return version if version > 0 else 1
+    except (ValueError, TypeError):
+        return 1
+
+
+def fetch_graph_documents(collection, workflow_id: str, graph_version: int) -> List[Dict]:
+    """Fetch graph docs for active version, with fallback for legacy unversioned data."""
+    docs = list(
+        collection.find({"workflow_id": workflow_id, "graph_version": graph_version})
+    )
+    if docs:
+        return docs
+    if graph_version == 1:
+        return list(
+            collection.find(
+                {"workflow_id": workflow_id, "graph_version": {"$exists": False}}
+            )
+        )
+    return docs
+
+
+def validate_json_schema_payload(
+    json_schema: Any,
+) -> tuple[Optional[Dict[str, Any]], Optional[str]]:
+    """Validate and normalize optional JSON schema payload for structured output."""
+    if json_schema is None:
+        return None, None
+    try:
+        return normalize_json_schema_payload(json_schema), None
+    except JsonSchemaValidationError as exc:
+        return None, str(exc)
+
+
+def normalize_agent_node_json_schemas(nodes: List[Dict]) -> List[Dict]:
+    """Normalize agent-node JSON schema payloads before persistence."""
+    normalized_nodes: List[Dict] = []
+    for node in nodes:
+        if not isinstance(node, dict):
+            normalized_nodes.append(node)
+            continue
+
+        normalized_node = dict(node)
+        if normalized_node.get("type") != "agent":
+            normalized_nodes.append(normalized_node)
+            continue
+
+        raw_config = normalized_node.get("data")
+        if not isinstance(raw_config, dict) or "json_schema" not in raw_config:
+            normalized_nodes.append(normalized_node)
+            continue
+
+        normalized_config = dict(raw_config)
+        try:
+            normalized_config["json_schema"] = normalize_json_schema_payload(
+                raw_config.get("json_schema")
+            )
+        except JsonSchemaValidationError:
+            # Validation runs before normalization; keep original on unexpected shape.
+            normalized_config["json_schema"] = raw_config.get("json_schema")
+        normalized_node["data"] = normalized_config
+        normalized_nodes.append(normalized_node)
+
+    return normalized_nodes
+
+
+def validate_workflow_structure(nodes: List[Dict], edges: List[Dict]) -> List[str]:
+    """Validate workflow graph structure."""
+    errors = []
+
+    if not nodes:
+        errors.append("Workflow must have at least one node")
+        return errors
+
+    start_nodes = [n for n in nodes if n.get("type") == "start"]
+    if len(start_nodes) != 1:
+        errors.append("Workflow must have exactly one start node")
+
+    end_nodes = [n for n in nodes if n.get("type") == "end"]
+    if not end_nodes:
+        errors.append("Workflow must have at least one end node")
+
+    node_ids = {n.get("id") for n in nodes}
+    node_map = {n.get("id"): n for n in nodes}
+    end_ids = {n.get("id") for n in end_nodes}
+
+    for edge in edges:
+        source_id = edge.get("source")
+        target_id = edge.get("target")
+        if source_id not in node_ids:
+            errors.append(f"Edge references non-existent source: {source_id}")
+        if target_id not in node_ids:
+            errors.append(f"Edge references non-existent target: {target_id}")
+
+    if start_nodes:
+        start_id = start_nodes[0].get("id")
+        if not any(e.get("source") == start_id for e in edges):
+            errors.append("Start node must have at least one outgoing edge")
+
+    condition_nodes = [n for n in nodes if n.get("type") == "condition"]
+    for cnode in condition_nodes:
+        cnode_id = cnode.get("id")
+        cnode_title = cnode.get("title", cnode_id)
+        outgoing = [e for e in edges if e.get("source") == cnode_id]
+        if len(outgoing) < 2:
+            errors.append(
+                f"Condition node '{cnode_title}' must have at least 2 outgoing edges"
+            )
+        node_data = cnode.get("data", {}) or {}
+        cases = node_data.get("cases", [])
+        if not isinstance(cases, list):
+            cases = []
+        if not cases or not any(
+            isinstance(c, dict) and str(c.get("expression", "")).strip() for c in cases
+        ):
+            errors.append(
+                f"Condition node '{cnode_title}' must have at least one case with an expression"
+            )
+
+        case_handles: Set[str] = set()
+        duplicate_case_handles: Set[str] = set()
+        for case in cases:
+            if not isinstance(case, dict):
+                continue
+            raw_handle = case.get("sourceHandle", "")
+            handle = raw_handle.strip() if isinstance(raw_handle, str) else ""
+            if not handle:
+                errors.append(
+                    f"Condition node '{cnode_title}' has a case without a branch handle"
+                )
+                continue
+            if handle in case_handles:
+                duplicate_case_handles.add(handle)
+            case_handles.add(handle)
+
+        for handle in duplicate_case_handles:
+            errors.append(
+                f"Condition node '{cnode_title}' has duplicate case handle '{handle}'"
+            )
+
+        outgoing_by_handle: Dict[str, List[Dict]] = {}
+        for out_edge in outgoing:
+            raw_handle = out_edge.get("sourceHandle", "")
+            handle = raw_handle.strip() if isinstance(raw_handle, str) else ""
+            outgoing_by_handle.setdefault(handle, []).append(out_edge)
+
+        for handle, handle_edges in outgoing_by_handle.items():
+            if not handle:
+                errors.append(
+                    f"Condition node '{cnode_title}' has an outgoing edge without sourceHandle"
+                )
+                continue
+            if handle != "else" and handle not in case_handles:
+                errors.append(
+                    f"Condition node '{cnode_title}' has a connection from unknown branch '{handle}'"
+                )
+            if len(handle_edges) > 1:
+                errors.append(
+                    f"Condition node '{cnode_title}' has multiple outgoing edges from branch '{handle}'"
+                )
+
+        if "else" not in outgoing_by_handle:
+            errors.append(f"Condition node '{cnode_title}' must have an 'else' branch")
+
+        for case in cases:
+            if not isinstance(case, dict):
+                continue
+            raw_handle = case.get("sourceHandle", "")
+            handle = raw_handle.strip() if isinstance(raw_handle, str) else ""
+            if not handle:
+                continue
+
+            raw_expression = case.get("expression", "")
+            has_expression = isinstance(raw_expression, str) and bool(
+                raw_expression.strip()
+            )
+            has_outgoing = bool(outgoing_by_handle.get(handle))
+            if has_expression and not has_outgoing:
+                errors.append(
+                    f"Condition node '{cnode_title}' case '{handle}' has an expression but no outgoing edge"
+                )
+            if not has_expression and has_outgoing:
+                errors.append(
+                    f"Condition node '{cnode_title}' case '{handle}' has an outgoing edge but no expression"
+                )
+
+        for handle, handle_edges in outgoing_by_handle.items():
+            if not handle:
+                continue
+            for out_edge in handle_edges:
+                target = out_edge.get("target")
+                if target and not _can_reach_end(target, edges, node_map, end_ids):
+                    errors.append(
+                        f"Branch '{handle}' of condition '{cnode_title}' "
+                        f"must eventually reach an end node"
+                    )
+
+    agent_nodes = [n for n in nodes if n.get("type") == "agent"]
+    for agent_node in agent_nodes:
+        agent_title = agent_node.get("title", agent_node.get("id", "unknown"))
+        raw_config = agent_node.get("data", {}) or {}
+        if not isinstance(raw_config, dict):
+            errors.append(f"Agent node '{agent_title}' has invalid configuration")
+            continue
+        normalized_schema, schema_error = validate_json_schema_payload(
+            raw_config.get("json_schema")
+        )
+        has_json_schema = normalized_schema is not None
+
+        model_id = raw_config.get("model_id")
+        if has_json_schema and isinstance(model_id, str) and model_id.strip():
+            capabilities = get_model_capabilities(model_id.strip())
+            if capabilities and not capabilities.get("supports_structured_output", False):
+                errors.append(
+                    f"Agent node '{agent_title}' selected model does not support structured output"
+                )
+        if schema_error:
+            errors.append(f"Agent node '{agent_title}' JSON schema {schema_error}")
+
+    for node in nodes:
+        if not node.get("id"):
+            errors.append("All nodes must have an id")
+        if not node.get("type"):
+            errors.append(f"Node {node.get('id', 'unknown')} must have a type")
+
+    return errors
+
+
+def _can_reach_end(
+    node_id: str, edges: List[Dict], node_map: Dict, end_ids: set, visited: set = None
+) -> bool:
+    if visited is None:
+        visited = set()
+    if node_id in end_ids:
+        return True
+    if node_id in visited or node_id not in node_map:
+        return False
+    visited.add(node_id)
+    outgoing = [e.get("target") for e in edges if e.get("source") == node_id]
+    return any(_can_reach_end(t, edges, node_map, end_ids, visited) for t in outgoing if t)
+
+
+def create_workflow_nodes(
+    workflow_id: str, nodes_data: List[Dict], graph_version: int
+) -> List[Dict]:
+    """Insert workflow nodes into Mongo and return rows with Mongo ids."""
+    if nodes_data:
+        mongo_nodes = [
+            {
+                "id": n["id"],
+                "workflow_id": workflow_id,
+                "graph_version": graph_version,
+                "type": n["type"],
+                "title": n.get("title", ""),
+                "description": n.get("description", ""),
+                "position": n.get("position", {"x": 0, "y": 0}),
+                "config": n.get("data", {}),
+            }
+            for n in nodes_data
+        ]
+        result = workflow_nodes_collection.insert_many(mongo_nodes)
+        return [
+            {**node, "legacy_mongo_id": str(inserted_id)}
+            for node, inserted_id in zip(nodes_data, result.inserted_ids)
+        ]
+    return []
+
+
+def create_workflow_edges(
+    workflow_id: str, edges_data: List[Dict], graph_version: int
+) -> None:
+    """Insert workflow edges into database."""
+    if edges_data:
+        workflow_edges_collection.insert_many(
+            [
+                {
+                    "id": e["id"],
+                    "workflow_id": workflow_id,
+                    "graph_version": graph_version,
+                    "source_id": e.get("source"),
+                    "target_id": e.get("target"),
+                    "source_handle": e.get("sourceHandle"),
+                    "target_handle": e.get("targetHandle"),
+                }
+                for e in edges_data
+            ]
+        )
+
+
+@workflows_ns.route("/workflows")
+class WorkflowList(Resource):
+
+    @require_auth
+    @require_fields(["name"])
+    def post(self):
+        """Create a new workflow with nodes and edges."""
+        user_id = get_user_id()
+        data = request.get_json()
+
+        name = data.get("name", "").strip()
+        nodes_data = data.get("nodes", [])
+        edges_data = data.get("edges", [])
+
+        validation_errors = validate_workflow_structure(nodes_data, edges_data)
+        if validation_errors:
+            return error_response(
+                "Workflow validation failed", errors=validation_errors
+            )
+        nodes_data = normalize_agent_node_json_schemas(nodes_data)
+
+        now = datetime.now(timezone.utc)
+        workflow_doc = {
+            "name": name,
+            "description": data.get("description", ""),
+            "user": user_id,
+            "created_at": now,
+            "updated_at": now,
+            "current_graph_version": 1,
+        }
+
+        result, error = safe_db_operation(
+            lambda: workflows_collection.insert_one(workflow_doc),
+            "Failed to create workflow",
+        )
+        if error:
+            return error
+
+        workflow_id = str(result.inserted_id)
+
+        try:
+            created_nodes = create_workflow_nodes(workflow_id, nodes_data, 1)
+            create_workflow_edges(workflow_id, edges_data, 1)
+        except Exception as err:
+            workflow_nodes_collection.delete_many({"workflow_id": workflow_id})
+            workflow_edges_collection.delete_many({"workflow_id": workflow_id})
+            workflows_collection.delete_one({"_id": result.inserted_id})
+            return _workflow_error_response("Failed to create workflow structure", err)
+
+        _dual_write_workflow_create(
+            workflow_id,
+            user_id,
+            name,
+            data.get("description", ""),
+            created_nodes,
+            edges_data,
+        )
+
+        return success_response({"id": workflow_id}, 201)
+
+
+@workflows_ns.route("/workflows/<string:workflow_id>")
+class WorkflowDetail(Resource):
+
+    @require_auth
+    def get(self, workflow_id: str):
+        """Get workflow details with nodes and edges."""
+        user_id = get_user_id()
+        obj_id, error = validate_object_id(workflow_id, "Workflow")
+        if error:
+            return error
+
+        workflow, error = check_resource_ownership(
+            workflows_collection, obj_id, user_id, "Workflow"
+        )
+        if error:
+            return error
+
+        graph_version = get_workflow_graph_version(workflow)
+        nodes = fetch_graph_documents(
+            workflow_nodes_collection, workflow_id, graph_version
+        )
+        edges = fetch_graph_documents(
+            workflow_edges_collection, workflow_id, graph_version
+        )
+
+        return success_response(
+            {
+                "workflow": serialize_workflow(workflow),
+                "nodes": [serialize_node(n) for n in nodes],
+                "edges": [serialize_edge(e) for e in edges],
+            }
+        )
+
+    @require_auth
+    @require_fields(["name"])
+    def put(self, workflow_id: str):
+        """Update workflow and replace nodes/edges."""
+        user_id = get_user_id()
+        obj_id, error = validate_object_id(workflow_id, "Workflow")
+        if error:
+            return error
+
+        workflow, error = check_resource_ownership(
+            workflows_collection, obj_id, user_id, "Workflow"
+        )
+        if error:
+            return error
+
+        data = request.get_json()
+        name = data.get("name", "").strip()
+        nodes_data = data.get("nodes", [])
+        edges_data = data.get("edges", [])
+
+        validation_errors = validate_workflow_structure(nodes_data, edges_data)
+        if validation_errors:
+            return error_response(
+                "Workflow validation failed", errors=validation_errors
+            )
+        nodes_data = normalize_agent_node_json_schemas(nodes_data)
+
+        current_graph_version = get_workflow_graph_version(workflow)
+        next_graph_version = current_graph_version + 1
+        try:
+            created_nodes = create_workflow_nodes(
+                workflow_id, nodes_data, next_graph_version,
+            )
+            create_workflow_edges(workflow_id, edges_data, next_graph_version)
+        except Exception as err:
+            workflow_nodes_collection.delete_many(
+                {"workflow_id": workflow_id, "graph_version": next_graph_version}
+            )
+            workflow_edges_collection.delete_many(
+                {"workflow_id": workflow_id, "graph_version": next_graph_version}
+            )
+            return _workflow_error_response("Failed to update workflow structure", err)
+
+        now = datetime.now(timezone.utc)
+        _, error = safe_db_operation(
+            lambda: workflows_collection.update_one(
+                {"_id": obj_id},
+                {
+                    "$set": {
+                        "name": name,
+                        "description": data.get("description", ""),
+                        "updated_at": now,
+                        "current_graph_version": next_graph_version,
+                    }
+                },
+            ),
+            "Failed to update workflow",
+        )
+        if error:
+            workflow_nodes_collection.delete_many(
+                {"workflow_id": workflow_id, "graph_version": next_graph_version}
+            )
+            workflow_edges_collection.delete_many(
+                {"workflow_id": workflow_id, "graph_version": next_graph_version}
+            )
+            return error
+
+        try:
+            workflow_nodes_collection.delete_many(
+                {"workflow_id": workflow_id, "graph_version": {"$ne": next_graph_version}}
+            )
+            workflow_edges_collection.delete_many(
+                {"workflow_id": workflow_id, "graph_version": {"$ne": next_graph_version}}
+            )
+        except Exception as cleanup_err:
+            current_app.logger.warning(
+                f"Failed to clean old workflow graph versions for {workflow_id}: {cleanup_err}"
+            )
+
+        _dual_write_workflow_update(
+            workflow_id,
+            user_id,
+            name,
+            data.get("description", ""),
+            created_nodes,
+            edges_data,
+            next_graph_version,
+        )
+
+        return success_response()
+
+    @require_auth
+    def delete(self, workflow_id: str):
+        """Delete workflow and its graph."""
+        user_id = get_user_id()
+        obj_id, error = validate_object_id(workflow_id, "Workflow")
+        if error:
+            return error
+
+        workflow, error = check_resource_ownership(
+            workflows_collection, obj_id, user_id, "Workflow"
+        )
+        if error:
+            return error
+
+        try:
+            workflow_nodes_collection.delete_many({"workflow_id": workflow_id})
+            workflow_edges_collection.delete_many({"workflow_id": workflow_id})
+            workflows_collection.delete_one({"_id": workflow["_id"], "user": user_id})
+        except Exception as err:
+            return _workflow_error_response("Failed to delete workflow", err)
+
+        _dual_write_workflow_delete(workflow_id, user_id)
+
+        return success_response()

application/api/v1/__init__.py

@@ -0,0 +1,3 @@
+from application.api.v1.routes import v1_bp
+
+__all__ = ["v1_bp"]

application/api/v1/routes.py

@@ -0,0 +1,333 @@
+"""Standard chat completions API routes.
+
+Exposes ``/v1/chat/completions`` and ``/v1/models`` endpoints that
+follow the widely-adopted chat completions protocol so external tools
+(opencode, continue, etc.) can connect to DocsGPT agents.
+"""
+
+import json
+import logging
+import time
+import traceback
+from typing import Any, Dict, Generator, Optional
+
+from flask import Blueprint, jsonify, make_response, request, Response
+
+from application.api.answer.routes.base import BaseAnswerResource
+from application.api.answer.services.stream_processor import StreamProcessor
+from application.api.v1.translator import (
+    translate_request,
+    translate_response,
+    translate_stream_event,
+)
+from application.core.mongo_db import MongoDB
+from application.core.settings import settings
+
+logger = logging.getLogger(__name__)
+
+v1_bp = Blueprint("v1", __name__, url_prefix="/v1")
+
+
+def _extract_bearer_token() -> Optional[str]:
+    """Extract API key from Authorization: Bearer header."""
+    auth = request.headers.get("Authorization", "")
+    if auth.startswith("Bearer "):
+        return auth[7:].strip()
+    return None
+
+
+def _lookup_agent(api_key: str) -> Optional[Dict]:
+    """Look up the agent document for this API key."""
+    try:
+        mongo = MongoDB.get_client()
+        db = mongo[settings.MONGO_DB_NAME]
+        return db["agents"].find_one({"key": api_key})
+    except Exception:
+        logger.warning("Failed to look up agent for API key", exc_info=True)
+        return None
+
+
+def _get_model_name(agent: Optional[Dict], api_key: str) -> str:
+    """Return agent name for display as model name."""
+    if agent:
+        return agent.get("name", api_key)
+    return api_key
+
+
+class _V1AnswerHelper(BaseAnswerResource):
+    """Thin wrapper to access complete_stream / process_response_stream."""
+    pass
+
+
+@v1_bp.route("/chat/completions", methods=["POST"])
+def chat_completions():
+    """Handle POST /v1/chat/completions."""
+    api_key = _extract_bearer_token()
+    if not api_key:
+        return make_response(
+            jsonify({"error": {"message": "Missing Authorization header", "type": "auth_error"}}),
+            401,
+        )
+
+    data = request.get_json()
+    if not data or not data.get("messages"):
+        return make_response(
+            jsonify({"error": {"message": "messages field is required", "type": "invalid_request"}}),
+            400,
+        )
+
+    is_stream = data.get("stream", False)
+    agent_doc = _lookup_agent(api_key)
+    model_name = _get_model_name(agent_doc, api_key)
+
+    try:
+        internal_data = translate_request(data, api_key)
+    except Exception as e:
+        logger.error(f"/v1/chat/completions translate error: {e}", exc_info=True)
+        return make_response(
+            jsonify({"error": {"message": "Failed to process request", "type": "invalid_request"}}),
+            400,
+        )
+
+    # Link decoded_token to the agent's owner so continuation state,
+    # logs, and tool execution use the correct user identity.
+    agent_user = agent_doc.get("user") if agent_doc else None
+    decoded_token = {"sub": agent_user or "api_key_user"}
+
+    try:
+        processor = StreamProcessor(internal_data, decoded_token)
+
+        if internal_data.get("tool_actions"):
+            # Continuation mode
+            conversation_id = internal_data.get("conversation_id")
+            if not conversation_id:
+                return make_response(
+                    jsonify({"error": {"message": "conversation_id required for tool continuation", "type": "invalid_request"}}),
+                    400,
+                )
+            (
+                agent,
+                messages,
+                tools_dict,
+                pending_tool_calls,
+                tool_actions,
+            ) = processor.resume_from_tool_actions(
+                internal_data["tool_actions"], conversation_id
+            )
+            continuation = {
+                "messages": messages,
+                "tools_dict": tools_dict,
+                "pending_tool_calls": pending_tool_calls,
+                "tool_actions": tool_actions,
+            }
+            question = ""
+        else:
+            # Normal mode
+            question = internal_data.get("question", "")
+            agent = processor.build_agent(question)
+            continuation = None
+
+        if not processor.decoded_token:
+            return make_response(
+                jsonify({"error": {"message": "Unauthorized", "type": "auth_error"}}),
+                401,
+            )
+
+        helper = _V1AnswerHelper()
+        usage_error = helper.check_usage(processor.agent_config)
+        if usage_error:
+            return usage_error
+
+        should_save_conversation = bool(internal_data.get("save_conversation", False))
+
+        if is_stream:
+            return Response(
+                _stream_response(
+                    helper,
+                    question,
+                    agent,
+                    processor,
+                    model_name,
+                    continuation,
+                    should_save_conversation,
+                ),
+                mimetype="text/event-stream",
+                headers={
+                    "Cache-Control": "no-cache",
+                    "X-Accel-Buffering": "no",
+                },
+            )
+        else:
+            return _non_stream_response(
+                helper,
+                question,
+                agent,
+                processor,
+                model_name,
+                continuation,
+                should_save_conversation,
+            )
+
+    except ValueError as e:
+        logger.error(
+            f"/v1/chat/completions error: {e} - {traceback.format_exc()}",
+            extra={"error": str(e)},
+        )
+        return make_response(
+            jsonify({"error": {"message": "Failed to process request", "type": "invalid_request"}}),
+            400,
+        )
+    except Exception as e:
+        logger.error(
+            f"/v1/chat/completions error: {e} - {traceback.format_exc()}",
+            extra={"error": str(e)},
+        )
+        return make_response(
+            jsonify({"error": {"message": "Internal server error", "type": "server_error"}}),
+            500,
+        )
+
+
+def _stream_response(
+    helper: _V1AnswerHelper,
+    question: str,
+    agent: Any,
+    processor: StreamProcessor,
+    model_name: str,
+    continuation: Optional[Dict],
+    should_save_conversation: bool,
+) -> Generator[str, None, None]:
+    """Generate translated SSE chunks for streaming response."""
+    completion_id = f"chatcmpl-{int(time.time())}"
+
+    internal_stream = helper.complete_stream(
+        question=question,
+        agent=agent,
+        conversation_id=processor.conversation_id,
+        user_api_key=processor.agent_config.get("user_api_key"),
+        decoded_token=processor.decoded_token,
+        agent_id=processor.agent_id,
+        model_id=processor.model_id,
+        should_save_conversation=should_save_conversation,
+        _continuation=continuation,
+    )
+
+    for line in internal_stream:
+        if not line.strip():
+            continue
+        # Parse the internal SSE event
+        event_str = line.replace("data: ", "").strip()
+        try:
+            event_data = json.loads(event_str)
+        except (json.JSONDecodeError, TypeError):
+            continue
+
+        # Update completion_id when we get the conversation id
+        if event_data.get("type") == "id":
+            conv_id = event_data.get("id", "")
+            if conv_id:
+                completion_id = f"chatcmpl-{conv_id}"
+
+        # Translate to standard format
+        translated = translate_stream_event(event_data, completion_id, model_name)
+        for chunk in translated:
+            yield chunk
+
+
+def _non_stream_response(
+    helper: _V1AnswerHelper,
+    question: str,
+    agent: Any,
+    processor: StreamProcessor,
+    model_name: str,
+    continuation: Optional[Dict],
+    should_save_conversation: bool,
+) -> Response:
+    """Collect full response and return as single JSON."""
+    stream = helper.complete_stream(
+        question=question,
+        agent=agent,
+        conversation_id=processor.conversation_id,
+        user_api_key=processor.agent_config.get("user_api_key"),
+        decoded_token=processor.decoded_token,
+        agent_id=processor.agent_id,
+        model_id=processor.model_id,
+        should_save_conversation=should_save_conversation,
+        _continuation=continuation,
+    )
+
+    result = helper.process_response_stream(stream)
+
+    if result["error"]:
+        return make_response(
+            jsonify({"error": {"message": result["error"], "type": "server_error"}}),
+            500,
+        )
+
+    extra = result.get("extra")
+    pending = extra.get("pending_tool_calls") if isinstance(extra, dict) else None
+
+    response = translate_response(
+        conversation_id=result["conversation_id"],
+        answer=result["answer"] or "",
+        sources=result["sources"],
+        tool_calls=result["tool_calls"],
+        thought=result["thought"] or "",
+        model_name=model_name,
+        pending_tool_calls=pending,
+    )
+    return make_response(jsonify(response), 200)
+
+
+@v1_bp.route("/models", methods=["GET"])
+def list_models():
+    """Handle GET /v1/models — return agents as models."""
+    api_key = _extract_bearer_token()
+    if not api_key:
+        return make_response(
+            jsonify({"error": {"message": "Missing Authorization header", "type": "auth_error"}}),
+            401,
+        )
+
+    try:
+        mongo = MongoDB.get_client()
+        db = mongo[settings.MONGO_DB_NAME]
+        agents_collection = db["agents"]
+
+        # Find the agent for this api_key
+        agent = agents_collection.find_one({"key": api_key})
+        if not agent:
+            return make_response(
+                jsonify({"error": {"message": "Invalid API key", "type": "auth_error"}}),
+                401,
+            )
+
+        user = agent.get("user")
+
+        # Return all agents belonging to this user
+        user_agents = list(agents_collection.find({"user": user}))
+
+        models = []
+        for ag in user_agents:
+            created = ag.get("createdAt")
+            created_ts = int(created.timestamp()) if created else int(time.time())
+            model_id = str(ag.get("_id") or ag.get("id") or "")
+            models.append({
+                "id": model_id,
+                "object": "model",
+                "created": created_ts,
+                "owned_by": "docsgpt",
+                "name": ag.get("name", ""),
+                "description": ag.get("description", ""),
+            })
+
+        return make_response(
+            jsonify({"object": "list", "data": models}),
+            200,
+        )
+    except Exception as e:
+        logger.error(f"/v1/models error: {e}", exc_info=True)
+        return make_response(
+            jsonify({"error": {"message": "Internal server error", "type": "server_error"}}),
+            500,
+        )

application/api/v1/translator.py

@@ -0,0 +1,433 @@
+"""Translate between standard chat completions format and DocsGPT internals.
+
+This module handles:
+- Request translation (chat completions -> DocsGPT internal format)
+- Response translation (DocsGPT response -> chat completions format)
+- Streaming event translation (DocsGPT SSE -> standard SSE chunks)
+"""
+
+import json
+import time
+from typing import Any, Dict, List, Optional
+
+def _get_client_tool_name(tc: Dict) -> str:
+    """Return the original tool name for client-facing responses.
+
+    For client-side tools the ``tool_name`` field carries the name the
+    client originally registered.  Fall back to ``action_name`` (which
+    is now the clean LLM-visible name) or ``name``.
+    """
+    return tc.get("tool_name", tc.get("action_name", tc.get("name", "")))
+
+
+# ---------------------------------------------------------------------------
+# Request translation
+# ---------------------------------------------------------------------------
+
+
+def is_continuation(messages: List[Dict]) -> bool:
+    """Check if messages represent a tool-call continuation.
+
+    A continuation is detected when the last message(s) have ``role: "tool"``
+    immediately after an assistant message with ``tool_calls``.
+    """
+    if not messages:
+        return False
+    # Walk backwards: if we see tool messages before hitting a non-tool, non-assistant message
+    # and there's an assistant message with tool_calls, it's a continuation.
+    i = len(messages) - 1
+    while i >= 0 and messages[i].get("role") == "tool":
+        i -= 1
+    if i < 0:
+        return False
+    return (
+        messages[i].get("role") == "assistant"
+        and bool(messages[i].get("tool_calls"))
+    )
+
+
+def extract_tool_results(messages: List[Dict]) -> List[Dict]:
+    """Extract tool results from trailing tool messages for continuation.
+
+    Returns a list of ``tool_actions`` dicts with ``call_id`` and ``result``.
+    """
+    results = []
+    for msg in reversed(messages):
+        if msg.get("role") != "tool":
+            break
+        call_id = msg.get("tool_call_id", "")
+        content = msg.get("content", "")
+        if isinstance(content, str):
+            try:
+                content = json.loads(content)
+            except (json.JSONDecodeError, TypeError):
+                pass
+        results.append({"call_id": call_id, "result": content})
+    results.reverse()
+    return results
+
+
+def extract_conversation_id(messages: List[Dict]) -> Optional[str]:
+    """Try to extract conversation_id from the assistant message before tool results.
+
+    The conversation_id may be stored in a custom field on the assistant message
+    from a previous response cycle.
+    """
+    for msg in reversed(messages):
+        if msg.get("role") == "assistant":
+            # Check docsgpt extension
+            return msg.get("docsgpt", {}).get("conversation_id")
+    return None
+
+
+def extract_system_prompt(messages: List[Dict]) -> Optional[str]:
+    """Extract the first system message content from the messages array.
+
+    Returns None if no system message is present.
+    """
+    for msg in messages:
+        if msg.get("role") == "system":
+            return msg.get("content", "")
+    return None
+
+
+def convert_history(messages: List[Dict]) -> List[Dict]:
+    """Convert chat completions messages array to DocsGPT history format.
+
+    DocsGPT history is a list of ``{prompt, response}`` dicts.
+    Excludes the last user message (that becomes the ``question``).
+    """
+    history = []
+    i = 0
+    while i < len(messages):
+        msg = messages[i]
+        if msg.get("role") == "system":
+            i += 1
+            continue
+        if msg.get("role") == "user":
+            # Look ahead for assistant response
+            if i + 1 < len(messages) and messages[i + 1].get("role") == "assistant":
+                content = messages[i + 1].get("content") or ""
+                history.append({
+                    "prompt": msg.get("content", ""),
+                    "response": content,
+                })
+                i += 2
+                continue
+            # Last user message without response — skip (it's the question)
+            i += 1
+            continue
+        i += 1
+    return history
+
+
+def translate_request(
+    data: Dict[str, Any], api_key: str
+) -> Dict[str, Any]:
+    """Translate a chat completions request to DocsGPT internal format.
+
+    Args:
+        data: The incoming request body.
+        api_key: Agent API key from the Authorization header.
+
+    Returns:
+        Dict suitable for passing to ``StreamProcessor``.
+    """
+    messages = data.get("messages", [])
+
+    # Check for continuation (tool results after assistant tool_calls)
+    if is_continuation(messages):
+        tool_actions = extract_tool_results(messages)
+        conversation_id = extract_conversation_id(messages)
+        if not conversation_id:
+            conversation_id = data.get("conversation_id")
+        result = {
+            "conversation_id": conversation_id,
+            "tool_actions": tool_actions,
+            "api_key": api_key,
+        }
+        # Carry tools forward for next iteration
+        if data.get("tools"):
+            result["client_tools"] = data["tools"]
+        return result
+
+    # Normal request — extract question from last user message
+    question = ""
+    for msg in reversed(messages):
+        if msg.get("role") == "user":
+            question = msg.get("content", "")
+            break
+
+    history = convert_history(messages)
+    system_prompt_override = extract_system_prompt(messages)
+
+    docsgpt = data.get("docsgpt", {})
+
+    result = {
+        "question": question,
+        "api_key": api_key,
+        "history": json.dumps(history),
+        # Conversations are NOT persisted by default on the v1 endpoint.
+        # Callers opt in via ``docsgpt.save_conversation: true``.
+        "save_conversation": bool(docsgpt.get("save_conversation", False)),
+    }
+
+    if system_prompt_override is not None:
+        result["system_prompt_override"] = system_prompt_override
+
+    # Client tools
+    if data.get("tools"):
+        result["client_tools"] = data["tools"]
+
+    # DocsGPT extensions
+    if docsgpt.get("attachments"):
+        result["attachments"] = docsgpt["attachments"]
+
+    return result
+
+
+# ---------------------------------------------------------------------------
+# Response translation (non-streaming)
+# ---------------------------------------------------------------------------
+
+
+def translate_response(
+    conversation_id: str,
+    answer: str,
+    sources: Optional[List[Dict]],
+    tool_calls: Optional[List[Dict]],
+    thought: str,
+    model_name: str,
+    pending_tool_calls: Optional[List[Dict]] = None,
+) -> Dict[str, Any]:
+    """Translate DocsGPT response to chat completions format.
+
+    Args:
+        conversation_id: The DocsGPT conversation ID.
+        answer: The assistant's text response.
+        sources: RAG retrieval sources.
+        tool_calls: Completed tool call results.
+        thought: Reasoning/thinking tokens.
+        model_name: Model/agent identifier.
+        pending_tool_calls: Pending client-side tool calls (if paused).
+
+    Returns:
+        Dict in the standard chat completions response format.
+    """
+    created = int(time.time())
+    completion_id = f"chatcmpl-{conversation_id}" if conversation_id else f"chatcmpl-{created}"
+
+    # Build message
+    message: Dict[str, Any] = {"role": "assistant"}
+
+    if pending_tool_calls:
+        # Tool calls pending — return them for client execution
+        message["content"] = None
+        message["tool_calls"] = [
+            {
+                "id": tc.get("call_id", ""),
+                "type": "function",
+                "function": {
+                    "name": _get_client_tool_name(tc),
+                    "arguments": (
+                        json.dumps(tc["arguments"])
+                        if isinstance(tc.get("arguments"), dict)
+                        else tc.get("arguments", "{}")
+                    ),
+                },
+            }
+            for tc in pending_tool_calls
+        ]
+        finish_reason = "tool_calls"
+    else:
+        message["content"] = answer
+        if thought:
+            message["reasoning_content"] = thought
+        finish_reason = "stop"
+
+    result: Dict[str, Any] = {
+        "id": completion_id,
+        "object": "chat.completion",
+        "created": created,
+        "model": model_name,
+        "choices": [
+            {
+                "index": 0,
+                "message": message,
+                "finish_reason": finish_reason,
+            }
+        ],
+        "usage": {
+            "prompt_tokens": 0,
+            "completion_tokens": 0,
+            "total_tokens": 0,
+        },
+    }
+
+    # DocsGPT extensions
+    docsgpt: Dict[str, Any] = {}
+    if conversation_id:
+        docsgpt["conversation_id"] = conversation_id
+    if sources:
+        docsgpt["sources"] = sources
+    if tool_calls:
+        docsgpt["tool_calls"] = tool_calls
+    if docsgpt:
+        result["docsgpt"] = docsgpt
+
+    return result
+
+
+# ---------------------------------------------------------------------------
+# Streaming event translation
+# ---------------------------------------------------------------------------
+
+
+def _make_chunk(
+    completion_id: str,
+    model_name: str,
+    delta: Dict[str, Any],
+    finish_reason: Optional[str] = None,
+) -> str:
+    """Build a single SSE chunk in the standard streaming format."""
+    chunk = {
+        "id": completion_id,
+        "object": "chat.completion.chunk",
+        "created": int(time.time()),
+        "model": model_name,
+        "choices": [
+            {
+                "index": 0,
+                "delta": delta,
+                "finish_reason": finish_reason,
+            }
+        ],
+    }
+    return f"data: {json.dumps(chunk)}\n\n"
+
+
+def _make_docsgpt_chunk(data: Dict[str, Any]) -> str:
+    """Build a DocsGPT extension SSE chunk."""
+    return f"data: {json.dumps({'docsgpt': data})}\n\n"
+
+
+def translate_stream_event(
+    event_data: Dict[str, Any],
+    completion_id: str,
+    model_name: str,
+) -> List[str]:
+    """Translate a DocsGPT SSE event dict to standard streaming chunks.
+
+    May return 0, 1, or 2 chunks per input event. For example, a completed
+    tool call produces both a docsgpt extension chunk and nothing on the
+    standard side (since server-side tool calls aren't surfaced in standard
+    format).
+
+    Args:
+        event_data: Parsed DocsGPT event dict.
+        completion_id: The completion ID for this response.
+        model_name: Model/agent identifier.
+
+    Returns:
+        List of SSE-formatted strings to send to the client.
+    """
+    event_type = event_data.get("type")
+    chunks: List[str] = []
+
+    if event_type == "answer":
+        chunks.append(
+            _make_chunk(completion_id, model_name, {"content": event_data.get("answer", "")})
+        )
+
+    elif event_type == "thought":
+        chunks.append(
+            _make_chunk(
+                completion_id, model_name,
+                {"reasoning_content": event_data.get("thought", "")},
+            )
+        )
+
+    elif event_type == "source":
+        chunks.append(
+            _make_docsgpt_chunk({
+                "type": "source",
+                "sources": event_data.get("source", []),
+            })
+        )
+
+    elif event_type == "tool_call":
+        tc_data = event_data.get("data", {})
+        status = tc_data.get("status")
+
+        if status == "requires_client_execution":
+            # Standard: stream as tool_calls delta
+            args = tc_data.get("arguments", {})
+            args_str = json.dumps(args) if isinstance(args, dict) else str(args)
+            chunks.append(
+                _make_chunk(completion_id, model_name, {
+                    "tool_calls": [{
+                        "index": 0,
+                        "id": tc_data.get("call_id", ""),
+                        "type": "function",
+                        "function": {
+                            "name": _get_client_tool_name(tc_data),
+                            "arguments": args_str,
+                        },
+                    }],
+                })
+            )
+        elif status == "awaiting_approval":
+            # Extension: approval needed
+            chunks.append(_make_docsgpt_chunk({"type": "tool_call", "data": tc_data}))
+        elif status in ("completed", "pending", "error", "denied", "skipped"):
+            # Extension: tool call progress
+            chunks.append(_make_docsgpt_chunk({"type": "tool_call", "data": tc_data}))
+
+    elif event_type == "tool_calls_pending":
+        # Standard: finish_reason = tool_calls
+        chunks.append(
+            _make_chunk(completion_id, model_name, {}, finish_reason="tool_calls")
+        )
+        # Also emit as docsgpt extension
+        chunks.append(
+            _make_docsgpt_chunk({
+                "type": "tool_calls_pending",
+                "pending_tool_calls": event_data.get("data", {}).get("pending_tool_calls", []),
+            })
+        )
+
+    elif event_type == "end":
+        chunks.append(
+            _make_chunk(completion_id, model_name, {}, finish_reason="stop")
+        )
+        chunks.append("data: [DONE]\n\n")
+
+    elif event_type == "id":
+        chunks.append(
+            _make_docsgpt_chunk({
+                "type": "id",
+                "conversation_id": event_data.get("id", ""),
+            })
+        )
+
+    elif event_type == "error":
+        # Emit as standard error (non-standard but widely supported)
+        error_data = {
+            "error": {
+                "message": event_data.get("error", "An error occurred"),
+                "type": "server_error",
+            }
+        }
+        chunks.append(f"data: {json.dumps(error_data)}\n\n")
+
+    elif event_type == "structured_answer":
+        chunks.append(
+            _make_chunk(
+                completion_id, model_name,
+                {"content": event_data.get("answer", "")},
+            )
+        )
+
+    # Skip: tool_calls (redundant), research_plan, research_progress
+
+    return chunks

application/app.py

@@ -17,8 +17,13 @@ from application.api.answer import answer  # noqa: E402
 from application.api.internal.routes import internal  # noqa: E402
 from application.api.user.routes import user  # noqa: E402
 from application.api.connector.routes import connector  # noqa: E402
+from application.api.v1 import v1_bp  # noqa: E402
 from application.celery_init import celery  # noqa: E402
 from application.core.settings import settings  # noqa: E402
+from application.stt.upload_limits import (  # noqa: E402
+    build_stt_file_size_limit_message,
+    should_reject_stt_request,
+)
 
 
 if platform.system() == "Windows":
@@ -32,6 +37,7 @@ app.register_blueprint(user)
 app.register_blueprint(answer)
 app.register_blueprint(internal)
 app.register_blueprint(connector)
+app.register_blueprint(v1_bp)
 app.config.update(
     UPLOAD_FOLDER="inputs",
     CELERY_BROKER_URL=settings.CELERY_BROKER_URL,
@@ -68,6 +74,11 @@ def home():
         return "Welcome to DocsGPT Backend!"
 
 
+@app.route("/api/health")
+def health():
+    return jsonify({"status": "ok"})
+
+
 @app.route("/api/config")
 def get_config():
     response = {
@@ -88,6 +99,23 @@ def generate_token():
     return jsonify({"error": "Token generation not allowed in current auth mode"}), 400
 
 
+@app.before_request
+def enforce_stt_request_size_limits():
+    if request.method == "OPTIONS":
+        return None
+    if should_reject_stt_request(request.path, request.content_length):
+        return (
+            jsonify(
+                {
+                    "success": False,
+                    "message": build_stt_file_size_limit_message(),
+                }
+            ),
+            413,
+        )
+    return None
+
+
 @app.before_request
 def authenticate_request():
     if request.method == "OPTIONS":

application/auth.py

@@ -19,9 +19,9 @@ def handle_auth(request, data={}):
                 options={"verify_exp": False},
             )
             return decoded_token
-        except Exception as e:
+        except Exception:
             return {
-                "message": f"Authentication error: {str(e)}",
+                "message": "Authentication error: invalid token",
                 "error": "invalid_token",
             }
     else:

application/celery_init.py

@@ -1,6 +1,6 @@
 from celery import Celery
 from application.core.settings import settings
-from celery.signals import setup_logging
+from celery.signals import setup_logging, worker_process_init
 
 
 def make_celery(app_name=__name__):
@@ -20,4 +20,24 @@ def config_loggers(*args, **kwargs):
     setup_logging()
 
 
+@worker_process_init.connect
+def _dispose_db_engine_on_fork(*args, **kwargs):
+    """Dispose the SQLAlchemy engine pool in each forked Celery worker.
+
+    SQLAlchemy connection pools are not fork-safe: file descriptors shared
+    between the parent and a forked worker will corrupt the pool. Disposing
+    on ``worker_process_init`` gives every worker its own fresh pool on
+    first use.
+
+    Imported lazily so Celery workers that don't touch Postgres (or where
+    ``POSTGRES_URI`` is unset) don't fail at startup.
+    """
+    try:
+        from application.storage.db.engine import dispose_engine
+    except Exception:
+        return
+    dispose_engine()
+
+
 celery = make_celery()
+celery.config_from_object("application.celeryconfig")

application/celeryconfig.py

@@ -6,3 +6,6 @@ result_backend = os.getenv("CELERY_RESULT_BACKEND")
 task_serializer = 'json'
 result_serializer = 'json'
 accept_content = ['json']
+
+# Autodiscover tasks
+imports = ('application.api.user.tasks',)

application/core/db_uri.py

@@ -0,0 +1,89 @@
+"""Normalize user-supplied Postgres URIs for different drivers.
+
+DocsGPT has two Postgres connection strings pointing at potentially
+different databases:
+
+* ``POSTGRES_URI`` feeds SQLAlchemy, which needs the
+  ``postgresql+psycopg://`` dialect prefix to pick the psycopg v3 driver.
+* ``PGVECTOR_CONNECTION_STRING`` feeds ``psycopg.connect()`` directly
+  (via libpq) in ``application/vectorstore/pgvector.py``. libpq only
+  understands ``postgres://`` and ``postgresql://`` — the SQLAlchemy
+  dialect prefix is an invalid URI from its point of view.
+
+The two fields therefore need opposite normalization so operators don't
+have to know which driver a given field feeds. Each normalizer also
+silently upgrades the legacy ``postgresql+psycopg2://`` prefix since
+psycopg2 is no longer in the project.
+
+This module is deliberately separate from ``application/core/settings.py``
+so the Settings class stays focused on field declarations, and the
+URI-rewriting logic can be unit-tested without triggering ``.env``
+file loading from importing Settings.
+"""
+
+from __future__ import annotations
+
+
+def _rewrite_uri_prefixes(v, rewrites):
+    """Shared URI prefix rewriter used by both normalizers below.
+
+    Strips whitespace, returns ``None`` for empty / ``"none"`` values,
+    applies the first matching rewrite, and passes unrecognised input
+    through so downstream consumers (SQLAlchemy, libpq) can produce
+    their own error messages rather than us silently eating a
+    misconfiguration.
+    """
+    if v is None:
+        return None
+    if not isinstance(v, str):
+        return v
+    v = v.strip()
+    if not v or v.lower() == "none":
+        return None
+    for prefix, target in rewrites:
+        if v.startswith(prefix):
+            return target + v[len(prefix):]
+    return v
+
+
+# POSTGRES_URI feeds SQLAlchemy, which needs a ``postgresql+psycopg://``
+# dialect prefix to select the psycopg v3 driver. Normalize the
+# operator-friendly forms TOWARD that dialect.
+_POSTGRES_URI_REWRITES = (
+    ("postgresql+psycopg2://", "postgresql+psycopg://"),
+    ("postgresql://", "postgresql+psycopg://"),
+    ("postgres://", "postgresql+psycopg://"),
+)
+
+
+# PGVECTOR_CONNECTION_STRING feeds ``psycopg.connect()`` directly in
+# application/vectorstore/pgvector.py — NOT SQLAlchemy. libpq only
+# understands ``postgres://`` and ``postgresql://``; the SQLAlchemy
+# dialect prefix is an invalid URI from libpq's point of view. Strip it
+# if the operator accidentally copied their POSTGRES_URI value here.
+_PGVECTOR_CONNECTION_STRING_REWRITES = (
+    ("postgresql+psycopg2://", "postgresql://"),
+    ("postgresql+psycopg://", "postgresql://"),
+)
+
+
+def normalize_postgres_uri(v):
+    """Normalize a user-supplied POSTGRES_URI to the SQLAlchemy psycopg3 form.
+
+    Accepts the forms operators naturally write (``postgres://``,
+    ``postgresql://``) and rewrites them to ``postgresql+psycopg://``.
+    Unknown schemes pass through unchanged so SQLAlchemy can produce its
+    own dialect-not-found error.
+    """
+    return _rewrite_uri_prefixes(v, _POSTGRES_URI_REWRITES)
+
+
+def normalize_pgvector_connection_string(v):
+    """Normalize a user-supplied PGVECTOR_CONNECTION_STRING for libpq.
+
+    Strips the SQLAlchemy dialect prefix if the operator accidentally
+    copied their POSTGRES_URI value here — libpq can't parse it.
+    User-friendly forms (``postgres://``, ``postgresql://``) pass
+    through unchanged since libpq accepts them natively.
+    """
+    return _rewrite_uri_prefixes(v, _PGVECTOR_CONNECTION_STRING_REWRITES)

application/core/json_schema_utils.py

@@ -0,0 +1,34 @@
+from typing import Any, Dict, Optional
+
+
+class JsonSchemaValidationError(ValueError):
+    """Raised when a JSON schema payload is invalid."""
+
+
+def normalize_json_schema_payload(json_schema: Any) -> Optional[Dict[str, Any]]:
+    """
+    Normalize accepted JSON schema payload shapes to a plain schema object.
+
+    Accepted inputs:
+    - None
+    - A raw schema object with a top-level "type"
+    - A wrapped payload with a top-level "schema" object
+    """
+    if json_schema is None:
+        return None
+
+    if not isinstance(json_schema, dict):
+        raise JsonSchemaValidationError("must be a valid JSON object")
+
+    wrapped_schema = json_schema.get("schema")
+    if wrapped_schema is not None:
+        if not isinstance(wrapped_schema, dict):
+            raise JsonSchemaValidationError('field "schema" must be a valid JSON object')
+        return wrapped_schema
+
+    if "type" not in json_schema:
+        raise JsonSchemaValidationError(
+            'must include either a "type" or "schema" field'
+        )
+
+    return json_schema

application/core/model_configs.py

@@ -8,8 +8,8 @@ from application.core.model_settings import (
     ModelProvider,
 )
 
-OPENAI_ATTACHMENTS = [
-    "application/pdf",
+# Base image attachment types supported by most vision-capable LLMs
+IMAGE_ATTACHMENTS = [
     "image/png",
     "image/jpeg",
     "image/jpg",
@@ -17,14 +17,17 @@ OPENAI_ATTACHMENTS = [
     "image/gif",
 ]
 
-GOOGLE_ATTACHMENTS = [
-    "application/pdf",
-    "image/png",
-    "image/jpeg",
-    "image/jpg",
-    "image/webp",
-    "image/gif",
-]
+# PDF excluded: most OpenAI-compatible endpoints don't support native PDF uploads.
+# When excluded, PDFs are synthetically processed by converting pages to images.
+OPENAI_ATTACHMENTS = IMAGE_ATTACHMENTS
+
+GOOGLE_ATTACHMENTS = ["application/pdf"] + IMAGE_ATTACHMENTS
+
+ANTHROPIC_ATTACHMENTS = IMAGE_ATTACHMENTS
+
+OPENROUTER_ATTACHMENTS = IMAGE_ATTACHMENTS
+
+NOVITA_ATTACHMENTS = IMAGE_ATTACHMENTS
 
 
 OPENAI_MODELS = [
@@ -63,6 +66,7 @@ ANTHROPIC_MODELS = [
         description="Latest Claude 3.5 Sonnet with enhanced capabilities",
         capabilities=ModelCapabilities(
             supports_tools=True,
+            supported_attachment_types=ANTHROPIC_ATTACHMENTS,
             context_window=200000,
         ),
     ),
@@ -73,6 +77,7 @@ ANTHROPIC_MODELS = [
         description="Balanced performance and capability",
         capabilities=ModelCapabilities(
             supports_tools=True,
+            supported_attachment_types=ANTHROPIC_ATTACHMENTS,
             context_window=200000,
         ),
     ),
@@ -83,6 +88,7 @@ ANTHROPIC_MODELS = [
         description="Most capable Claude model",
         capabilities=ModelCapabilities(
             supports_tools=True,
+            supported_attachment_types=ANTHROPIC_ATTACHMENTS,
             context_window=200000,
         ),
     ),
@@ -93,6 +99,7 @@ ANTHROPIC_MODELS = [
         description="Fastest Claude model",
         capabilities=ModelCapabilities(
             supports_tools=True,
+            supported_attachment_types=ANTHROPIC_ATTACHMENTS,
             context_window=200000,
         ),
     ),
@@ -151,23 +158,78 @@ GROQ_MODELS = [
         ),
     ),
     AvailableModel(
-        id="llama-3.1-8b-instant",
+        id="openai/gpt-oss-120b",
         provider=ModelProvider.GROQ,
-        display_name="Llama 3.1 8B",
-        description="Ultra-fast inference",
+        display_name="GPT-OSS 120B",
+        description="Open-source GPT model optimized for speed",
         capabilities=ModelCapabilities(
             supports_tools=True,
             context_window=128000,
         ),
     ),
+]
+
+
+OPENROUTER_MODELS = [
     AvailableModel(
-        id="mixtral-8x7b-32768",
-        provider=ModelProvider.GROQ,
-        display_name="Mixtral 8x7B",
-        description="High-speed inference with tools",
+        id="qwen/qwen3-coder:free",
+        provider=ModelProvider.OPENROUTER,
+        display_name="Qwen 3 Coder",
+        description="Latest Qwen model with high-speed inference",
         capabilities=ModelCapabilities(
             supports_tools=True,
-            context_window=32768,
+            context_window=128000,
+            supported_attachment_types=OPENROUTER_ATTACHMENTS
+        ),
+    ),
+    AvailableModel(
+        id="google/gemma-3-27b-it:free",
+        provider=ModelProvider.OPENROUTER,
+        display_name="Gemma 3 27B",
+        description="Latest Gemma model with high-speed inference",
+        capabilities=ModelCapabilities(
+            supports_tools=True,
+            context_window=128000,
+            supported_attachment_types=OPENROUTER_ATTACHMENTS
+        ),
+    ),
+]
+
+NOVITA_MODELS = [
+    AvailableModel(
+        id="moonshotai/kimi-k2.5",
+        provider=ModelProvider.NOVITA,
+        display_name="Kimi K2.5",
+        description="MoE model with function calling, structured output, reasoning, and vision",
+        capabilities=ModelCapabilities(
+            supports_tools=True,
+            supports_structured_output=True,
+            supported_attachment_types=NOVITA_ATTACHMENTS,
+            context_window=262144,
+        ),
+    ),
+    AvailableModel(
+        id="zai-org/glm-5",
+        provider=ModelProvider.NOVITA,
+        display_name="GLM-5",
+        description="MoE model with function calling, structured output, and reasoning",
+        capabilities=ModelCapabilities(
+            supports_tools=True,
+            supports_structured_output=True,
+            supported_attachment_types=[],
+            context_window=202800,
+        ),
+    ),
+    AvailableModel(
+        id="minimax/minimax-m2.5",
+        provider=ModelProvider.NOVITA,
+        display_name="MiniMax M2.5",
+        description="MoE model with function calling, structured output, and reasoning",
+        capabilities=ModelCapabilities(
+            supports_tools=True,
+            supports_structured_output=True,
+            supported_attachment_types=[],
+            context_window=204800,
         ),
     ),
 ]
@@ -187,3 +249,18 @@ AZURE_OPENAI_MODELS = [
         ),
     ),
 ]
+
+
+def create_custom_openai_model(model_name: str, base_url: str) -> AvailableModel:
+    """Create a custom OpenAI-compatible model (e.g., LM Studio, Ollama)."""
+    return AvailableModel(
+        id=model_name,
+        provider=ModelProvider.OPENAI,
+        display_name=model_name,
+        description=f"Custom OpenAI-compatible model at {base_url}",
+        base_url=base_url,
+        capabilities=ModelCapabilities(
+            supports_tools=True,
+            supported_attachment_types=OPENAI_ATTACHMENTS,
+        ),
+    )

application/core/model_settings.py

@@ -8,6 +8,7 @@ logger = logging.getLogger(__name__)
 
 class ModelProvider(str, Enum):
     OPENAI = "openai"
+    OPENROUTER = "openrouter"
     AZURE_OPENAI = "azure_openai"
     ANTHROPIC = "anthropic"
     GROQ = "groq"
@@ -84,9 +85,13 @@ class ModelRegistry:
 
         self.models.clear()
 
-        self._add_docsgpt_models(settings)
-        if settings.OPENAI_API_KEY or (
-            settings.LLM_PROVIDER == "openai" and settings.API_KEY
+        # Skip DocsGPT model if using custom OpenAI-compatible endpoint
+        if not settings.OPENAI_BASE_URL:
+            self._add_docsgpt_models(settings)
+        if (
+            settings.OPENAI_API_KEY
+            or (settings.LLM_PROVIDER == "openai" and settings.API_KEY)
+            or settings.OPENAI_BASE_URL
         ):
             self._add_openai_models(settings)
         if settings.OPENAI_API_BASE or (
@@ -105,39 +110,73 @@ class ModelRegistry:
             settings.LLM_PROVIDER == "groq" and settings.API_KEY
         ):
             self._add_groq_models(settings)
+        if settings.OPEN_ROUTER_API_KEY or (
+            settings.LLM_PROVIDER == "openrouter" and settings.API_KEY
+        ):
+            self._add_openrouter_models(settings)
+        if settings.NOVITA_API_KEY or (
+            settings.LLM_PROVIDER == "novita" and settings.API_KEY
+        ):
+            self._add_novita_models(settings)
         if settings.HUGGINGFACE_API_KEY or (
             settings.LLM_PROVIDER == "huggingface" and settings.API_KEY
         ):
             self._add_huggingface_models(settings)
         # Default model selection
-
-        if settings.LLM_NAME and settings.LLM_NAME in self.models:
-            self.default_model_id = settings.LLM_NAME
-        elif settings.LLM_PROVIDER and settings.API_KEY:
-            for model_id, model in self.models.items():
-                if model.provider.value == settings.LLM_PROVIDER:
-                    self.default_model_id = model_id
+        if settings.LLM_NAME:
+            # Parse LLM_NAME (may be comma-separated)
+            model_names = self._parse_model_names(settings.LLM_NAME)
+            # First model in the list becomes default
+            for model_name in model_names:
+                if model_name in self.models:
+                    self.default_model_id = model_name
                     break
-        else:
+            # Backward compat: try exact match if no parsed model found
+            if not self.default_model_id and settings.LLM_NAME in self.models:
+                self.default_model_id = settings.LLM_NAME
+
+        if not self.default_model_id:
+            if settings.LLM_PROVIDER and settings.API_KEY:
+                for model_id, model in self.models.items():
+                    if model.provider.value == settings.LLM_PROVIDER:
+                        self.default_model_id = model_id
+                        break
+
+        if not self.default_model_id and self.models:
             self.default_model_id = next(iter(self.models.keys()))
         logger.info(
             f"ModelRegistry loaded {len(self.models)} models, default: {self.default_model_id}"
         )
 
     def _add_openai_models(self, settings):
-        from application.core.model_configs import OPENAI_MODELS
+        from application.core.model_configs import (
+            OPENAI_MODELS,
+            create_custom_openai_model,
+        )
 
-        if settings.OPENAI_API_KEY:
-            for model in OPENAI_MODELS:
-                self.models[model.id] = model
-            return
-        if settings.LLM_PROVIDER == "openai" and settings.LLM_NAME:
-            for model in OPENAI_MODELS:
-                if model.id == settings.LLM_NAME:
+        # Check if using local OpenAI-compatible endpoint (Ollama, LM Studio, etc.)
+        using_local_endpoint = bool(
+            settings.OPENAI_BASE_URL and settings.OPENAI_BASE_URL.strip()
+        )
+
+        if using_local_endpoint:
+            # When OPENAI_BASE_URL is set, ONLY register custom models from LLM_NAME
+            # Do NOT add standard OpenAI models (gpt-5.1, etc.)
+            if settings.LLM_NAME:
+                model_names = self._parse_model_names(settings.LLM_NAME)
+                for model_name in model_names:
+                    custom_model = create_custom_openai_model(
+                        model_name, settings.OPENAI_BASE_URL
+                    )
+                    self.models[model_name] = custom_model
+                    logger.info(
+                        f"Registered custom OpenAI model: {model_name} at {settings.OPENAI_BASE_URL}"
+                    )
+        else:
+            # Standard OpenAI API usage - add standard models if API key is valid
+            if settings.OPENAI_API_KEY:
+                for model in OPENAI_MODELS:
                     self.models[model.id] = model
-                    return
-        for model in OPENAI_MODELS:
-            self.models[model.id] = model
 
     def _add_azure_openai_models(self, settings):
         from application.core.model_configs import AZURE_OPENAI_MODELS
@@ -194,6 +233,36 @@ class ModelRegistry:
                     return
         for model in GROQ_MODELS:
             self.models[model.id] = model
+    
+    def _add_openrouter_models(self, settings):
+        from application.core.model_configs import OPENROUTER_MODELS
+
+        if settings.OPEN_ROUTER_API_KEY:
+            for model in OPENROUTER_MODELS:
+                self.models[model.id] = model
+            return
+        if settings.LLM_PROVIDER == "openrouter" and settings.LLM_NAME:
+            for model in OPENROUTER_MODELS:
+                if model.id == settings.LLM_NAME:
+                    self.models[model.id] = model
+                    return
+        for model in OPENROUTER_MODELS:
+            self.models[model.id] = model
+
+    def _add_novita_models(self, settings):
+        from application.core.model_configs import NOVITA_MODELS
+
+        if settings.NOVITA_API_KEY:
+            for model in NOVITA_MODELS:
+                self.models[model.id] = model
+            return
+        if settings.LLM_PROVIDER == "novita" and settings.LLM_NAME:
+            for model in NOVITA_MODELS:
+                if model.id == settings.LLM_NAME:
+                    self.models[model.id] = model
+                    return
+        for model in NOVITA_MODELS:
+            self.models[model.id] = model
 
     def _add_docsgpt_models(self, settings):
         model_id = "docsgpt-local"
@@ -223,6 +292,15 @@ class ModelRegistry:
         )
         self.models[model_id] = model
 
+    def _parse_model_names(self, llm_name: str) -> List[str]:
+        """
+        Parse LLM_NAME which may contain comma-separated model names.
+        E.g., 'deepseek-r1:1.5b,gemma:2b' -> ['deepseek-r1:1.5b', 'gemma:2b']
+        """
+        if not llm_name:
+            return []
+        return [name.strip() for name in llm_name.split(",") if name.strip()]
+
     def get_model(self, model_id: str) -> Optional[AvailableModel]:
         return self.models.get(model_id)
 

application/core/model_utils.py

@@ -9,6 +9,8 @@ def get_api_key_for_provider(provider: str) -> Optional[str]:
 
     provider_key_map = {
         "openai": settings.OPENAI_API_KEY,
+        "openrouter": settings.OPEN_ROUTER_API_KEY,
+        "novita": settings.NOVITA_API_KEY,
         "anthropic": settings.ANTHROPIC_API_KEY,
         "google": settings.GOOGLE_API_KEY,
         "groq": settings.GROQ_API_KEY,

application/core/settings.py

@@ -2,24 +2,37 @@ import os
 from pathlib import Path
 from typing import Optional
 
-from pydantic_settings import BaseSettings
+from pydantic import field_validator
+from pydantic_settings import BaseSettings, SettingsConfigDict
 
-current_dir = os.path.dirname(
-    os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+current_dir = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+
+from application.core.db_uri import (  # noqa: E402
+    normalize_pgvector_connection_string,
+    normalize_postgres_uri,
 )
 
 
 class Settings(BaseSettings):
+    model_config = SettingsConfigDict(extra="ignore")
+
     AUTH_TYPE: Optional[str] = None  # simple_jwt, session_jwt, or None
     LLM_PROVIDER: str = "docsgpt"
-    LLM_NAME: Optional[str] = (
-        None  # if LLM_PROVIDER is openai, LLM_NAME can be gpt-4 or gpt-3.5-turbo
-    )
+    LLM_NAME: Optional[str] = None  # if LLM_PROVIDER is openai, LLM_NAME can be gpt-4 or gpt-3.5-turbo
     EMBEDDINGS_NAME: str = "huggingface_sentence-transformers/all-mpnet-base-v2"
+    EMBEDDINGS_BASE_URL: Optional[str] = None  # Remote embeddings API URL (OpenAI-compatible)
+    EMBEDDINGS_KEY: Optional[str] = None  # api key for embeddings (if using openai, just copy API_KEY)
+
     CELERY_BROKER_URL: str = "redis://localhost:6379/0"
     CELERY_RESULT_BACKEND: str = "redis://localhost:6379/1"
     MONGO_URI: str = "mongodb://localhost:27017/docsgpt"
     MONGO_DB_NAME: str = "docsgpt"
+    # User-data Postgres DB.
+    POSTGRES_URI: Optional[str] = None
+
+    # MongoDB→Postgres migration: dual-write to Postgres (Mongo stays source of truth)
+    USE_POSTGRES: bool = False
     LLM_PATH: str = os.path.join(current_dir, "models/docsgpt-7b-f16.gguf")
     DEFAULT_MAX_HISTORY: int = 150
     DEFAULT_LLM_TOKEN_LIMIT: int = 128000  # Fallback when model not found in registry
@@ -35,9 +48,9 @@ class Settings(BaseSettings):
     UPLOAD_FOLDER: str = "inputs"
     PARSE_PDF_AS_IMAGE: bool = False
     PARSE_IMAGE_REMOTE: bool = False
-    VECTOR_STORE: str = (
-        "faiss"  #  "faiss" or "elasticsearch" or "qdrant" or "milvus" or "lancedb"
-    )
+    DOCLING_OCR_ENABLED: bool = False  # Enable OCR for docling parsers (PDF, images)
+    DOCLING_OCR_ATTACHMENTS_ENABLED: bool = False  # Enable OCR for docling when parsing attachments
+    VECTOR_STORE: str = "faiss"  #  "faiss" or "elasticsearch" or "qdrant" or "milvus" or "lancedb" or "pgvector"
     RETRIEVERS_ENABLED: list = ["classic_rag"]
     AGENT_NAME: str = "classic"
     FALLBACK_LLM_PROVIDER: Optional[str] = None  # provider for fallback llm
@@ -45,16 +58,22 @@ class Settings(BaseSettings):
     FALLBACK_LLM_API_KEY: Optional[str] = None  # api key for fallback llm
 
     # Google Drive integration
-    GOOGLE_CLIENT_ID: Optional[str] = (
-        None  # Replace with your actual Google OAuth client ID
-    )
-    GOOGLE_CLIENT_SECRET: Optional[str] = (
-        None  # Replace with your actual Google OAuth client secret
-    )
+    GOOGLE_CLIENT_ID: Optional[str] = None  # Replace with your actual Google OAuth client ID
+    GOOGLE_CLIENT_SECRET: Optional[str] = None  # Replace with your actual Google OAuth client secret
     CONNECTOR_REDIRECT_BASE_URI: Optional[str] = (
         "http://127.0.0.1:7091/api/connectors/callback"  ##add redirect url as it is to your provider's console(gcp)
     )
 
+    # Microsoft Entra ID (Azure AD) integration
+    MICROSOFT_CLIENT_ID: Optional[str] = None  # Azure AD Application (client) ID
+    MICROSOFT_CLIENT_SECRET: Optional[str] = None  # Azure AD Application client secret
+    MICROSOFT_TENANT_ID: Optional[str] = "common"  # Azure AD Tenant ID (or 'common' for multi-tenant)
+    MICROSOFT_AUTHORITY: Optional[str] = None  # e.g., "https://login.microsoftonline.com/{tenant_id}"
+
+    # Confluence Cloud integration
+    CONFLUENCE_CLIENT_ID: Optional[str] = None
+    CONFLUENCE_CLIENT_SECRET: Optional[str] = None
+
     # GitHub source
     GITHUB_ACCESS_TOKEN: Optional[str] = None  # PAT token with read repo access
 
@@ -62,6 +81,7 @@ class Settings(BaseSettings):
     CACHE_REDIS_URL: str = "redis://localhost:6379/2"
 
     API_URL: str = "http://localhost:7091"  # backend url for celery worker
+    MCP_OAUTH_REDIRECT_URI: Optional[str] = None  # public callback URL for MCP OAuth
     INTERNAL_KEY: Optional[str] = None  # internal api key for worker-to-backend auth
 
     API_KEY: Optional[str] = None  # LLM api key (used by LLM_PROVIDER)
@@ -72,19 +92,14 @@ class Settings(BaseSettings):
     GOOGLE_API_KEY: Optional[str] = None
     GROQ_API_KEY: Optional[str] = None
     HUGGINGFACE_API_KEY: Optional[str] = None
+    OPEN_ROUTER_API_KEY: Optional[str] = None
+    NOVITA_API_KEY: Optional[str] = None
 
-    EMBEDDINGS_KEY: Optional[str] = (
-        None  # api key for embeddings (if using openai, just copy API_KEY)
-    )
     OPENAI_API_BASE: Optional[str] = None  # azure openai api base url
     OPENAI_API_VERSION: Optional[str] = None  # azure openai api version
     AZURE_DEPLOYMENT_NAME: Optional[str] = None  # azure deployment name for answering
-    AZURE_EMBEDDINGS_DEPLOYMENT_NAME: Optional[str] = (
-        None  # azure deployment name for embeddings
-    )
-    OPENAI_BASE_URL: Optional[str] = (
-        None  # openai base url for open ai compatable models
-    )
+    AZURE_EMBEDDINGS_DEPLOYMENT_NAME: Optional[str] = None  # azure deployment name for embeddings
+    OPENAI_BASE_URL: Optional[str] = None  # openai base url for open ai compatable models
 
     # elasticsearch
     ELASTIC_CLOUD_ID: Optional[str] = None  # cloud id for elasticsearch
@@ -117,7 +132,10 @@ class Settings(BaseSettings):
     QDRANT_PATH: Optional[str] = None
     QDRANT_DISTANCE_FUNC: str = "Cosine"
 
-    # PGVector vectorstore config
+    # PGVector vectorstore config. Write the URI in whichever form you
+    # prefer — ``postgres://``, ``postgresql://``, or even the SQLAlchemy
+    # dialect form (``postgresql+psycopg://``) are all accepted and
+    # normalized internally for ``psycopg.connect()``.
     PGVECTOR_CONNECTION_STRING: Optional[str] = None
     # Milvus vectorstore config
     MILVUS_COLLECTION_NAME: Optional[str] = "docsgpt"
@@ -125,10 +143,8 @@ class Settings(BaseSettings):
     MILVUS_TOKEN: Optional[str] = ""
 
     # LanceDB vectorstore config
-    LANCEDB_PATH: str = "/tmp/lancedb"  # Path where LanceDB stores its local data
-    LANCEDB_TABLE_NAME: Optional[str] = (
-        "docsgpts"  # Name of the table to use for storing vectors
-    )
+    LANCEDB_PATH: str = "./data/lancedb"  # Path where LanceDB stores its local data
+    LANCEDB_TABLE_NAME: Optional[str] = "docsgpts"  # Name of the table to use for storing vectors
 
     FLASK_DEBUG_MODE: bool = False
     STORAGE_TYPE: str = "local"  # local or s3
@@ -141,6 +157,12 @@ class Settings(BaseSettings):
 
     TTS_PROVIDER: str = "google_tts"  # google_tts or elevenlabs
     ELEVENLABS_API_KEY: Optional[str] = None
+    STT_PROVIDER: str = "openai"  # openai or faster_whisper
+    OPENAI_STT_MODEL: str = "gpt-4o-mini-transcribe"
+    STT_LANGUAGE: Optional[str] = None
+    STT_MAX_FILE_SIZE_MB: int = 50
+    STT_ENABLE_TIMESTAMPS: bool = False
+    STT_ENABLE_DIARIZATION: bool = False
 
     # Tool pre-fetch settings
     ENABLE_TOOL_PREFETCH: bool = True
@@ -152,6 +174,48 @@ class Settings(BaseSettings):
     COMPRESSION_PROMPT_VERSION: str = "v1.0"  # Track prompt iterations
     COMPRESSION_MAX_HISTORY_POINTS: int = 3  # Keep only last N compression points to prevent DB bloat
 
+    @field_validator("POSTGRES_URI", mode="before")
+    @classmethod
+    def _normalize_postgres_uri_validator(cls, v):
+        return normalize_postgres_uri(v)
 
-path = Path(__file__).parent.parent.absolute()
+    @field_validator("PGVECTOR_CONNECTION_STRING", mode="before")
+    @classmethod
+    def _normalize_pgvector_connection_string_validator(cls, v):
+        return normalize_pgvector_connection_string(v)
+
+    @field_validator(
+        "API_KEY",
+        "OPENAI_API_KEY",
+        "ANTHROPIC_API_KEY",
+        "GOOGLE_API_KEY",
+        "GROQ_API_KEY",
+        "HUGGINGFACE_API_KEY",
+        "NOVITA_API_KEY",
+        "EMBEDDINGS_KEY",
+        "FALLBACK_LLM_API_KEY",
+        "QDRANT_API_KEY",
+        "ELEVENLABS_API_KEY",
+        "INTERNAL_KEY",
+        mode="before",
+    )
+    @classmethod
+    def normalize_api_key(cls, v: Optional[str]) -> Optional[str]:
+        """
+        Normalize API keys: convert 'None', 'none', empty strings,
+        and whitespace-only strings to actual None.
+        Handles Pydantic loading 'None' from .env as string "None".
+        """
+        if v is None:
+            return None
+        if not isinstance(v, str):
+            return v
+        stripped = v.strip()
+        if stripped == "" or stripped.lower() == "none":
+            return None
+        return stripped
+
+
+# Project root is one level above application/
+path = Path(__file__).parent.parent.parent.absolute()
 settings = Settings(_env_file=path.joinpath(".env"), _env_file_encoding="utf-8")

application/core/url_validation.py

@@ -0,0 +1,181 @@
+"""
+URL validation utilities to prevent SSRF (Server-Side Request Forgery) attacks.
+
+This module provides functions to validate URLs before making HTTP requests,
+blocking access to internal networks, cloud metadata services, and other
+potentially dangerous endpoints.
+"""
+
+import ipaddress
+import socket
+from urllib.parse import urlparse
+from typing import Optional, Set
+
+
+class SSRFError(Exception):
+    """Raised when a URL fails SSRF validation."""
+    pass
+
+
+# Blocked hostnames that should never be accessed
+BLOCKED_HOSTNAMES: Set[str] = {
+    "localhost",
+    "localhost.localdomain",
+    "metadata.google.internal",
+    "metadata",
+}
+
+# Cloud metadata IP addresses (AWS, GCP, Azure, etc.)
+METADATA_IPS: Set[str] = {
+    "169.254.169.254",  # AWS, GCP, Azure metadata
+    "169.254.170.2",    # AWS ECS task metadata
+    "fd00:ec2::254",    # AWS IPv6 metadata
+}
+
+# Allowed schemes for external requests
+ALLOWED_SCHEMES: Set[str] = {"http", "https"}
+
+
+def is_private_ip(ip_str: str) -> bool:
+    """
+    Check if an IP address is private, loopback, or link-local.
+
+    Args:
+        ip_str: IP address as a string
+
+    Returns:
+        True if the IP is private/internal, False otherwise
+    """
+    try:
+        ip = ipaddress.ip_address(ip_str)
+        return (
+            ip.is_private or
+            ip.is_loopback or
+            ip.is_link_local or
+            ip.is_reserved or
+            ip.is_multicast or
+            ip.is_unspecified
+        )
+    except ValueError:
+        # If we can't parse it as an IP, return False
+        return False
+
+
+def is_metadata_ip(ip_str: str) -> bool:
+    """
+    Check if an IP address is a cloud metadata service IP.
+
+    Args:
+        ip_str: IP address as a string
+
+    Returns:
+        True if the IP is a metadata service, False otherwise
+    """
+    return ip_str in METADATA_IPS
+
+
+def resolve_hostname(hostname: str) -> Optional[str]:
+    """
+    Resolve a hostname to an IP address.
+
+    Args:
+        hostname: The hostname to resolve
+
+    Returns:
+        The resolved IP address, or None if resolution fails
+    """
+    try:
+        return socket.gethostbyname(hostname)
+    except socket.gaierror:
+        return None
+
+
+def validate_url(url: str, allow_localhost: bool = False) -> str:
+    """
+    Validate a URL to prevent SSRF attacks.
+
+    This function checks that:
+    1. The URL has an allowed scheme (http or https)
+    2. The hostname is not a blocked hostname
+    3. The resolved IP is not a private/internal IP
+    4. The resolved IP is not a cloud metadata service
+
+    Args:
+        url: The URL to validate
+        allow_localhost: If True, allow localhost connections (for testing only)
+
+    Returns:
+        The validated URL (with scheme added if missing)
+
+    Raises:
+        SSRFError: If the URL fails validation
+    """
+    # Ensure URL has a scheme
+    if not urlparse(url).scheme:
+        url = "http://" + url
+
+    parsed = urlparse(url)
+
+    # Check scheme
+    if parsed.scheme not in ALLOWED_SCHEMES:
+        raise SSRFError(f"URL scheme '{parsed.scheme}' is not allowed. Only HTTP(S) is permitted.")
+
+    hostname = parsed.hostname
+    if not hostname:
+        raise SSRFError("URL must have a valid hostname.")
+
+    hostname_lower = hostname.lower()
+
+    # Check blocked hostnames
+    if hostname_lower in BLOCKED_HOSTNAMES and not allow_localhost:
+        raise SSRFError(f"Access to '{hostname}' is not allowed.")
+
+    # Check if hostname is an IP address directly
+    try:
+        ip = ipaddress.ip_address(hostname)
+        ip_str = str(ip)
+
+        if is_metadata_ip(ip_str):
+            raise SSRFError("Access to cloud metadata services is not allowed.")
+
+        if is_private_ip(ip_str) and not allow_localhost:
+            raise SSRFError("Access to private/internal IP addresses is not allowed.")
+
+        return url
+    except ValueError:
+        # Not an IP address, it's a hostname - resolve it
+        pass
+
+    # Resolve hostname and check the IP
+    resolved_ip = resolve_hostname(hostname)
+    if resolved_ip is None:
+        raise SSRFError(f"Unable to resolve hostname: {hostname}")
+
+    if is_metadata_ip(resolved_ip):
+        raise SSRFError("Access to cloud metadata services is not allowed.")
+
+    if is_private_ip(resolved_ip) and not allow_localhost:
+        raise SSRFError("Access to private/internal networks is not allowed.")
+
+    return url
+
+
+def validate_url_safe(url: str, allow_localhost: bool = False) -> tuple[bool, str, Optional[str]]:
+    """
+    Validate a URL and return a tuple with validation result.
+
+    This is a non-throwing version of validate_url for cases where
+    you want to handle validation failures gracefully.
+
+    Args:
+        url: The URL to validate
+        allow_localhost: If True, allow localhost connections (for testing only)
+
+    Returns:
+        Tuple of (is_valid, validated_url_or_original, error_message_or_none)
+    """
+    try:
+        validated = validate_url(url, allow_localhost)
+        return (True, validated, None)
+    except SSRFError as e:
+        return (False, url, str(e))

application/error.py

@@ -13,3 +13,25 @@ def response_error(code_status, message=None):
 
 def bad_request(status_code=400, message=''):
     return response_error(code_status=status_code, message=message)
+
+
+def sanitize_api_error(error) -> str:
+    """
+    Convert technical API errors to user-friendly messages.
+    Works with both Exception objects and error message strings.
+    """
+    error_str = str(error).lower()
+    if "503" in error_str or "unavailable" in error_str or "high demand" in error_str:
+        return "The AI service is temporarily unavailable due to high demand. Please try again in a moment."
+    if "429" in error_str or "rate limit" in error_str or "quota" in error_str:
+        return "Rate limit exceeded. Please wait a moment before trying again."
+    if "401" in error_str or "unauthorized" in error_str or "invalid api key" in error_str:
+        return "Authentication error. Please check your API configuration."
+    if "timeout" in error_str or "timed out" in error_str:
+        return "The request timed out. Please try again."
+    if "connection" in error_str or "network" in error_str:
+        return "Network error. Please check your connection and try again."
+    original = str(error)
+    if len(original) > 200 or "{" in original or "traceback" in error_str:
+        return "An error occurred while processing your request. Please try again later."
+    return original

application/llm/anthropic.py

@@ -1,7 +1,13 @@
+import base64
+import logging
+
 from anthropic import AI_PROMPT, Anthropic, HUMAN_PROMPT
 
 from application.core.settings import settings
 from application.llm.base import BaseLLM
+from application.storage.storage_creator import StorageCreator
+
+logger = logging.getLogger(__name__)
 
 
 class AnthropicLLM(BaseLLM):
@@ -20,6 +26,7 @@ class AnthropicLLM(BaseLLM):
 
         self.HUMAN_PROMPT = HUMAN_PROMPT
         self.AI_PROMPT = AI_PROMPT
+        self.storage = StorageCreator.get_storage()
 
     def _raw_gen(
         self,
@@ -70,3 +77,115 @@ class AnthropicLLM(BaseLLM):
         finally:
             if hasattr(stream_response, "close"):
                 stream_response.close()
+
+    def get_supported_attachment_types(self):
+        """
+        Return a list of MIME types supported by Anthropic Claude for file uploads.
+        Claude supports images but not PDFs natively.
+        PDFs are synthetically supported via PDF-to-image conversion in the handler.
+
+        Returns:
+            list: List of supported MIME types
+        """
+        return [
+            "image/png",
+            "image/jpeg",
+            "image/jpg",
+            "image/webp",
+            "image/gif",
+        ]
+
+    def prepare_messages_with_attachments(self, messages, attachments=None):
+        """
+        Process attachments for Anthropic Claude API.
+        Formats images using Claude's vision message format.
+
+        Args:
+            messages (list): List of message dictionaries.
+            attachments (list): List of attachment dictionaries with content and metadata.
+
+        Returns:
+            list: Messages formatted with image content for Claude API.
+        """
+        if not attachments:
+            return messages
+
+        prepared_messages = messages.copy()
+
+        # Find the last user message to attach images to
+        user_message_index = None
+        for i in range(len(prepared_messages) - 1, -1, -1):
+            if prepared_messages[i].get("role") == "user":
+                user_message_index = i
+                break
+
+        if user_message_index is None:
+            user_message = {"role": "user", "content": []}
+            prepared_messages.append(user_message)
+            user_message_index = len(prepared_messages) - 1
+
+        # Convert content to list format if it's a string
+        if isinstance(prepared_messages[user_message_index].get("content"), str):
+            text_content = prepared_messages[user_message_index]["content"]
+            prepared_messages[user_message_index]["content"] = [
+                {"type": "text", "text": text_content}
+            ]
+        elif not isinstance(prepared_messages[user_message_index].get("content"), list):
+            prepared_messages[user_message_index]["content"] = []
+
+        for attachment in attachments:
+            mime_type = attachment.get("mime_type")
+
+            if mime_type and mime_type.startswith("image/"):
+                try:
+                    # Check if this is a pre-converted image (from PDF-to-image conversion)
+                    # These have 'data' key with base64 already
+                    if "data" in attachment:
+                        base64_image = attachment["data"]
+                    else:
+                        base64_image = self._get_base64_image(attachment)
+
+                    # Claude uses a specific format for images
+                    prepared_messages[user_message_index]["content"].append(
+                        {
+                            "type": "image",
+                            "source": {
+                                "type": "base64",
+                                "media_type": mime_type,
+                                "data": base64_image,
+                            },
+                        }
+                    )
+
+                except Exception as e:
+                    logger.error(
+                        f"Error processing image attachment: {e}", exc_info=True
+                    )
+                    if "content" in attachment:
+                        prepared_messages[user_message_index]["content"].append(
+                            {
+                                "type": "text",
+                                "text": f"[Image could not be processed: {attachment.get('path', 'unknown')}]",
+                            }
+                        )
+
+        return prepared_messages
+
+    def _get_base64_image(self, attachment):
+        """
+        Convert an image file to base64 encoding.
+
+        Args:
+            attachment (dict): Attachment dictionary with path and metadata.
+
+        Returns:
+            str: Base64-encoded image data.
+        """
+        file_path = attachment.get("path")
+        if not file_path:
+            raise ValueError("No file path provided in attachment")
+        try:
+            with self.storage.get_file(file_path) as image_file:
+                return base64.b64encode(image_file.read()).decode("utf-8")
+        except FileNotFoundError:
+            raise FileNotFoundError(f"File not found: {file_path}")

application/llm/base.py

@@ -13,37 +13,81 @@ class BaseLLM(ABC):
     def __init__(
         self,
         decoded_token=None,
+        agent_id=None,
         model_id=None,
         base_url=None,
+        backup_models=None,
     ):
         self.decoded_token = decoded_token
+        self.agent_id = str(agent_id) if agent_id else None
         self.model_id = model_id
         self.base_url = base_url
         self.token_usage = {"prompt_tokens": 0, "generated_tokens": 0}
+        self._backup_models = backup_models or []
         self._fallback_llm = None
-        self._fallback_sequence_index = 0
 
     @property
     def fallback_llm(self):
-        """Lazy-loaded fallback LLM from FALLBACK_* settings."""
-        if self._fallback_llm is None and settings.FALLBACK_LLM_PROVIDER:
-            try:
-                from application.llm.llm_creator import LLMCreator
+        """Lazy-loaded fallback LLM: tries per-agent backup models first,
+        then the global FALLBACK_* settings."""
+        if self._fallback_llm is not None:
+            return self._fallback_llm
 
+        from application.llm.llm_creator import LLMCreator
+        from application.core.model_utils import (
+            get_provider_from_model_id,
+            get_api_key_for_provider,
+        )
+
+        # Try per-agent backup models first
+        for backup_model_id in self._backup_models:
+            try:
+                provider = get_provider_from_model_id(backup_model_id)
+                if not provider:
+                    logger.warning(
+                        f"Could not resolve provider for backup model: {backup_model_id}"
+                    )
+                    continue
+                api_key = get_api_key_for_provider(provider)
+                self._fallback_llm = LLMCreator.create_llm(
+                    provider,
+                    api_key=api_key,
+                    user_api_key=getattr(self, "user_api_key", None),
+                    decoded_token=self.decoded_token,
+                    model_id=backup_model_id,
+                    agent_id=self.agent_id,
+                )
+                logger.info(
+                    f"Fallback LLM initialized from agent backup model: "
+                    f"{provider}/{backup_model_id}"
+                )
+                return self._fallback_llm
+            except Exception as e:
+                logger.warning(
+                    f"Failed to initialize backup model {backup_model_id}: {str(e)}"
+                )
+                continue
+
+        # Fall back to global FALLBACK_* settings
+        if settings.FALLBACK_LLM_PROVIDER:
+            try:
                 self._fallback_llm = LLMCreator.create_llm(
                     settings.FALLBACK_LLM_PROVIDER,
                     api_key=settings.FALLBACK_LLM_API_KEY or settings.API_KEY,
-                    user_api_key=None,
+                    user_api_key=getattr(self, "user_api_key", None),
                     decoded_token=self.decoded_token,
                     model_id=settings.FALLBACK_LLM_NAME,
+                    agent_id=self.agent_id,
                 )
                 logger.info(
-                    f"Fallback LLM initialized: {settings.FALLBACK_LLM_PROVIDER}/{settings.FALLBACK_LLM_NAME}"
+                    f"Fallback LLM initialized from global settings: "
+                    f"{settings.FALLBACK_LLM_PROVIDER}/{settings.FALLBACK_LLM_NAME}"
                 )
             except Exception as e:
                 logger.error(
                     f"Failed to initialize fallback LLM: {str(e)}", exc_info=True
                 )
+
         return self._fallback_llm
 
     @staticmethod
@@ -71,20 +115,60 @@ class BaseLLM(ABC):
                 method = decorator(method)
             return method(self, *args, **kwargs)
 
+        is_stream = "stream" in method_name
+
+        if is_stream:
+            return self._stream_with_fallback(
+                decorated_method, method_name, *args, **kwargs
+            )
+
         try:
             return decorated_method()
         except Exception as e:
             if not self.fallback_llm:
                 logger.error(f"Primary LLM failed and no fallback configured: {str(e)}")
                 raise
+            fallback = self.fallback_llm
             logger.warning(
-                f"Primary LLM failed. Falling back to {settings.FALLBACK_LLM_PROVIDER}/{settings.FALLBACK_LLM_NAME}. Error: {str(e)}"
+                f"Primary LLM failed. Falling back to "
+                f"{fallback.model_id}. Error: {str(e)}"
             )
 
             fallback_method = getattr(
-                self.fallback_llm, method_name.replace("_raw_", "")
+                fallback, method_name.replace("_raw_", "")
             )
-            return fallback_method(*args, **kwargs)
+            fallback_kwargs = {**kwargs, "model": fallback.model_id}
+            return fallback_method(*args, **fallback_kwargs)
+
+    def _stream_with_fallback(
+        self, decorated_method, method_name, *args, **kwargs
+    ):
+        """
+        Wrapper generator that catches mid-stream errors and falls back.
+
+        Unlike non-streaming calls where exceptions are raised immediately,
+        streaming generators raise exceptions during iteration. This wrapper
+        ensures that if the primary LLM fails at any point during streaming
+        (creation or mid-stream), we fall back to the backup model.
+        """
+        try:
+            yield from decorated_method()
+        except Exception as e:
+            if not self.fallback_llm:
+                logger.error(
+                    f"Primary LLM failed and no fallback configured: {str(e)}"
+                )
+                raise
+            fallback = self.fallback_llm
+            logger.warning(
+                f"Primary LLM failed mid-stream. Falling back to "
+                f"{fallback.model_id}. Error: {str(e)}"
+            )
+            fallback_method = getattr(
+                fallback, method_name.replace("_raw_", "")
+            )
+            fallback_kwargs = {**kwargs, "model": fallback.model_id}
+            yield from fallback_method(*args, **fallback_kwargs)
 
     def gen(self, model, messages, stream=False, tools=None, *args, **kwargs):
         decorators = [gen_token_usage, gen_cache]