diff --git a/docs/reference/RELEASING.md b/docs/reference/RELEASING.md
index 163759e7513..6b5dc29c9b9 100644
--- a/docs/reference/RELEASING.md
+++ b/docs/reference/RELEASING.md
@@ -38,7 +38,6 @@ When the operator says “release”, immediately do this preflight (no extra qu
 3. **Changelog & docs**
 
 - [ ] Update `CHANGELOG.md` with user-facing highlights (create the file if missing); keep entries strictly descending by version.
-  - Tip: use `pnpm changelog:add -- --section fixes --entry "Your entry. (#12345) Thanks @contrib."` (or `--section changes`) to append deterministically under the current Unreleased block.
 - [ ] Ensure README examples/flags match current CLI behavior (notably new commands or options).
 
 4. **Validation**
diff --git a/package.json b/package.json
index 76d0868422f..66a60a5dc00 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,6 @@
     "build": "pnpm canvas:a2ui:bundle && tsdown && pnpm build:plugin-sdk:dts && node --import tsx scripts/write-plugin-sdk-entry-dts.ts && node --import tsx scripts/canvas-a2ui-copy.ts && node --import tsx scripts/copy-hook-metadata.ts && node --import tsx scripts/copy-export-html-templates.ts && node --import tsx scripts/write-build-info.ts && node --import tsx scripts/write-cli-compat.ts",
     "build:plugin-sdk:dts": "tsc -p tsconfig.plugin-sdk.dts.json",
     "canvas:a2ui:bundle": "bash scripts/bundle-a2ui.sh",
-    "changelog:add": "node --import tsx scripts/changelog-add.ts",
     "check": "pnpm format:check && pnpm tsgo && pnpm lint",
     "check:docs": "pnpm format:docs:check && pnpm lint:docs && pnpm docs:check-links",
     "check:loc": "node --import tsx scripts/check-ts-max-loc.ts --max 500",
diff --git a/scripts/changelog-add.ts b/scripts/changelog-add.ts
deleted file mode 100644
index 2422a00ef4b..00000000000
--- a/scripts/changelog-add.ts
+++ /dev/null
@@ -1,123 +0,0 @@
-import { readFileSync, writeFileSync } from "node:fs";
-import { resolve } from "node:path";
-
-export type UnreleasedSection = "changes" | "fixes";
-
-function normalizeEntry(entry: string): string {
-  const trimmed = entry.trim();
-  if (!trimmed) {
-    throw new Error("entry must not be empty");
-  }
-  return trimmed.startsWith("- ") ? trimmed : `- ${trimmed}`;
-}
-
-function sectionHeading(section: UnreleasedSection): string {
-  return section === "changes" ? "### Changes" : "### Fixes";
-}
-
-export function insertUnreleasedChangelogEntry(
-  changelogContent: string,
-  section: UnreleasedSection,
-  entry: string,
-): string {
-  const normalizedEntry = normalizeEntry(entry);
-  const lines = changelogContent.split(/\r?\n/);
-  const unreleasedHeaderIndex = lines.findIndex((line) =>
-    /^##\s+.+\s+\(Unreleased\)\s*$/.test(line.trim()),
-  );
-  if (unreleasedHeaderIndex < 0) {
-    throw new Error("could not find an '(Unreleased)' changelog section");
-  }
-
-  const unreleasedEndIndex = lines.findIndex(
-    (line, index) => index > unreleasedHeaderIndex && /^##\s+/.test(line.trim()),
-  );
-  const unreleasedLimit = unreleasedEndIndex < 0 ? lines.length : unreleasedEndIndex;
-  const sectionLabel = sectionHeading(section);
-  const sectionStartIndex = lines.findIndex(
-    (line, index) =>
-      index > unreleasedHeaderIndex && index < unreleasedLimit && line.trim() === sectionLabel,
-  );
-  if (sectionStartIndex < 0) {
-    throw new Error(`could not find '${sectionLabel}' under unreleased section`);
-  }
-
-  const sectionEndIndex = lines.findIndex(
-    (line, index) =>
-      index > sectionStartIndex &&
-      index < unreleasedLimit &&
-      (/^###\s+/.test(line.trim()) || /^##\s+/.test(line.trim())),
-  );
-  const targetIndex = sectionEndIndex < 0 ? unreleasedLimit : sectionEndIndex;
-  let insertionIndex = targetIndex;
-  while (insertionIndex > sectionStartIndex + 1 && lines[insertionIndex - 1].trim() === "") {
-    insertionIndex -= 1;
-  }
-
-  if (
-    lines.slice(sectionStartIndex + 1, targetIndex).some((line) => line.trim() === normalizedEntry)
-  ) {
-    return changelogContent;
-  }
-
-  lines.splice(insertionIndex, 0, normalizedEntry);
-  return `${lines.join("\n")}\n`;
-}
-
-type CliArgs = {
-  section: UnreleasedSection;
-  entry: string;
-  file: string;
-};
-
-function parseCliArgs(argv: string[]): CliArgs {
-  let section: UnreleasedSection | null = null;
-  let entry = "";
-  let file = "CHANGELOG.md";
-
-  for (let i = 0; i < argv.length; i += 1) {
-    const arg = argv[i];
-    if (arg === "--section") {
-      const value = argv[i + 1];
-      if (value !== "changes" && value !== "fixes") {
-        throw new Error("--section must be one of: changes, fixes");
-      }
-      section = value;
-      i += 1;
-      continue;
-    }
-    if (arg === "--entry") {
-      entry = argv[i + 1] ?? "";
-      i += 1;
-      continue;
-    }
-    if (arg === "--file") {
-      file = argv[i + 1] ?? file;
-      i += 1;
-      continue;
-    }
-    throw new Error(`unknown argument: ${arg}`);
-  }
-
-  if (!section) {
-    throw new Error("missing --section <changes|fixes>");
-  }
-  if (!entry.trim()) {
-    throw new Error("missing --entry <text>");
-  }
-  return { section, entry, file };
-}
-
-function runCli(): void {
-  const args = parseCliArgs(process.argv.slice(2));
-  const changelogPath = resolve(process.cwd(), args.file);
-  const content = readFileSync(changelogPath, "utf8");
-  const next = insertUnreleasedChangelogEntry(content, args.section, args.entry);
-  if (next !== content) {
-    writeFileSync(changelogPath, next, "utf8");
-  }
-}
-
-if (import.meta.url === `file://${process.argv[1]}`) {
-  runCli();
-}
diff --git a/test/scripts/changelog-add.test.ts b/test/scripts/changelog-add.test.ts
deleted file mode 100644
index f9c0d4755d8..00000000000
--- a/test/scripts/changelog-add.test.ts
+++ /dev/null
@@ -1,45 +0,0 @@
-import { describe, expect, it } from "vitest";
-import { insertUnreleasedChangelogEntry } from "../../scripts/changelog-add.ts";
-
-const SAMPLE = `# Changelog
-
-## 2026.2.24 (Unreleased)
-
-### Changes
-
-- Existing change.
-
-### Fixes
-
-- Existing fix.
-
-## 2026.2.23
-
-### Changes
-
-- Older entry.
-`;
-
-describe("changelog-add", () => {
-  it("inserts a new unreleased fixes entry before the next version section", () => {
-    const next = insertUnreleasedChangelogEntry(
-      SAMPLE,
-      "fixes",
-      "New fix entry. (#123) Thanks @someone.",
-    );
-    expect(next).toContain(
-      "- Existing fix.\n- New fix entry. (#123) Thanks @someone.\n\n## 2026.2.23",
-    );
-  });
-
-  it("normalizes missing bullet prefix", () => {
-    const next = insertUnreleasedChangelogEntry(SAMPLE, "changes", "New change.");
-    expect(next).toContain("- Existing change.\n- New change.\n\n### Fixes");
-  });
-
-  it("does not duplicate identical entry", () => {
-    const once = insertUnreleasedChangelogEntry(SAMPLE, "fixes", "New fix.");
-    const twice = insertUnreleasedChangelogEntry(once, "fixes", "New fix.");
-    expect(twice).toBe(once);
-  });
-});