diff --git a/extensions/bluebubbles/src/actions.test.ts b/extensions/bluebubbles/src/actions.test.ts
index efb4859fac4..aabc5adf8fe 100644
--- a/extensions/bluebubbles/src/actions.test.ts
+++ b/extensions/bluebubbles/src/actions.test.ts
@@ -3,17 +3,10 @@ import { describe, expect, it, vi, beforeEach } from "vitest";
 import { bluebubblesMessageActions } from "./actions.js";
 import { getCachedBlueBubblesPrivateApiStatus } from "./probe.js";
 
-vi.mock("./accounts.js", () => ({
-  resolveBlueBubblesAccount: vi.fn(({ cfg, accountId }) => {
-    const config = cfg?.channels?.bluebubbles ?? {};
-    return {
-      accountId: accountId ?? "default",
-      enabled: config.enabled !== false,
-      configured: Boolean(config.serverUrl && config.password),
-      config,
-    };
-  }),
-}));
+vi.mock("./accounts.js", async () => {
+  const { createBlueBubblesAccountsMockModule } = await import("./test-harness.js");
+  return createBlueBubblesAccountsMockModule();
+});
 
 vi.mock("./reactions.js", () => ({
   sendBlueBubblesReaction: vi.fn().mockResolvedValue(undefined),
diff --git a/extensions/bluebubbles/src/chat.test.ts b/extensions/bluebubbles/src/chat.test.ts
index f372ca4614e..d22ded63613 100644
--- a/extensions/bluebubbles/src/chat.test.ts
+++ b/extensions/bluebubbles/src/chat.test.ts
@@ -1,6 +1,16 @@
 import { describe, expect, it, vi } from "vitest";
 import "./test-mocks.js";
-import { markBlueBubblesChatRead, sendBlueBubblesTyping, setGroupIconBlueBubbles } from "./chat.js";
+import {
+  addBlueBubblesParticipant,
+  editBlueBubblesMessage,
+  leaveBlueBubblesChat,
+  markBlueBubblesChatRead,
+  removeBlueBubblesParticipant,
+  renameBlueBubblesChat,
+  sendBlueBubblesTyping,
+  setGroupIconBlueBubbles,
+  unsendBlueBubblesMessage,
+} from "./chat.js";
 import { getCachedBlueBubblesPrivateApiStatus } from "./probe.js";
 import { installBlueBubblesFetchTestHooks } from "./test-harness.js";
 
@@ -278,6 +288,188 @@ describe("chat", () => {
     });
   });
 
+  describe("editBlueBubblesMessage", () => {
+    it("throws when required args are missing", async () => {
+      await expect(editBlueBubblesMessage("", "updated", {})).rejects.toThrow("messageGuid");
+      await expect(editBlueBubblesMessage("message-guid", "   ", {})).rejects.toThrow("newText");
+    });
+
+    it("sends edit request with default payload values", async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        text: () => Promise.resolve(""),
+      });
+
+      await editBlueBubblesMessage(" message-guid ", " updated text ", {
+        serverUrl: "http://localhost:1234",
+        password: "test-password",
+      });
+
+      expect(mockFetch).toHaveBeenCalledWith(
+        expect.stringContaining("/api/v1/message/message-guid/edit"),
+        expect.objectContaining({
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+        }),
+      );
+      const body = JSON.parse(mockFetch.mock.calls[0][1].body);
+      expect(body).toEqual({
+        editedMessage: "updated text",
+        backwardsCompatibilityMessage: "Edited to: updated text",
+        partIndex: 0,
+      });
+    });
+
+    it("supports custom part index and backwards compatibility message", async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        text: () => Promise.resolve(""),
+      });
+
+      await editBlueBubblesMessage("message-guid", "new text", {
+        serverUrl: "http://localhost:1234",
+        password: "test-password",
+        partIndex: 3,
+        backwardsCompatMessage: "custom-backwards-message",
+      });
+
+      const body = JSON.parse(mockFetch.mock.calls[0][1].body);
+      expect(body.partIndex).toBe(3);
+      expect(body.backwardsCompatibilityMessage).toBe("custom-backwards-message");
+    });
+
+    it("throws on non-ok response", async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: false,
+        status: 422,
+        text: () => Promise.resolve("Unprocessable"),
+      });
+
+      await expect(
+        editBlueBubblesMessage("message-guid", "new text", {
+          serverUrl: "http://localhost:1234",
+          password: "test-password",
+        }),
+      ).rejects.toThrow("edit failed (422): Unprocessable");
+    });
+  });
+
+  describe("unsendBlueBubblesMessage", () => {
+    it("throws when messageGuid is missing", async () => {
+      await expect(unsendBlueBubblesMessage("", {})).rejects.toThrow("messageGuid");
+    });
+
+    it("sends unsend request with default part index", async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        text: () => Promise.resolve(""),
+      });
+
+      await unsendBlueBubblesMessage(" msg-123 ", {
+        serverUrl: "http://localhost:1234",
+        password: "test-password",
+      });
+
+      expect(mockFetch).toHaveBeenCalledWith(
+        expect.stringContaining("/api/v1/message/msg-123/unsend"),
+        expect.objectContaining({
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+        }),
+      );
+      const body = JSON.parse(mockFetch.mock.calls[0][1].body);
+      expect(body.partIndex).toBe(0);
+    });
+
+    it("uses custom part index", async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        text: () => Promise.resolve(""),
+      });
+
+      await unsendBlueBubblesMessage("msg-123", {
+        serverUrl: "http://localhost:1234",
+        password: "test-password",
+        partIndex: 2,
+      });
+
+      const body = JSON.parse(mockFetch.mock.calls[0][1].body);
+      expect(body.partIndex).toBe(2);
+    });
+  });
+
+  describe("group chat mutation actions", () => {
+    it("renames chat", async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        text: () => Promise.resolve(""),
+      });
+
+      await renameBlueBubblesChat(" chat-guid ", "New Group Name", {
+        serverUrl: "http://localhost:1234",
+        password: "test-password",
+      });
+
+      expect(mockFetch).toHaveBeenCalledWith(
+        expect.stringContaining("/api/v1/chat/chat-guid"),
+        expect.objectContaining({ method: "PUT" }),
+      );
+      const body = JSON.parse(mockFetch.mock.calls[0][1].body);
+      expect(body.displayName).toBe("New Group Name");
+    });
+
+    it("adds and removes participant using matching endpoint", async () => {
+      mockFetch
+        .mockResolvedValueOnce({
+          ok: true,
+          text: () => Promise.resolve(""),
+        })
+        .mockResolvedValueOnce({
+          ok: true,
+          text: () => Promise.resolve(""),
+        });
+
+      await addBlueBubblesParticipant("chat-guid", "+15551234567", {
+        serverUrl: "http://localhost:1234",
+        password: "test-password",
+      });
+      await removeBlueBubblesParticipant("chat-guid", "+15551234567", {
+        serverUrl: "http://localhost:1234",
+        password: "test-password",
+      });
+
+      expect(mockFetch).toHaveBeenCalledTimes(2);
+      expect(mockFetch.mock.calls[0][0]).toContain("/api/v1/chat/chat-guid/participant");
+      expect(mockFetch.mock.calls[0][1].method).toBe("POST");
+      expect(mockFetch.mock.calls[1][0]).toContain("/api/v1/chat/chat-guid/participant");
+      expect(mockFetch.mock.calls[1][1].method).toBe("DELETE");
+
+      const addBody = JSON.parse(mockFetch.mock.calls[0][1].body);
+      const removeBody = JSON.parse(mockFetch.mock.calls[1][1].body);
+      expect(addBody.address).toBe("+15551234567");
+      expect(removeBody.address).toBe("+15551234567");
+    });
+
+    it("leaves chat without JSON body", async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        text: () => Promise.resolve(""),
+      });
+
+      await leaveBlueBubblesChat("chat-guid", {
+        serverUrl: "http://localhost:1234",
+        password: "test-password",
+      });
+
+      expect(mockFetch).toHaveBeenCalledWith(
+        expect.stringContaining("/api/v1/chat/chat-guid/leave"),
+        expect.objectContaining({ method: "POST" }),
+      );
+      expect(mockFetch.mock.calls[0][1].body).toBeUndefined();
+      expect(mockFetch.mock.calls[0][1].headers).toBeUndefined();
+    });
+  });
+
   describe("setGroupIconBlueBubbles", () => {
     it("throws when chatGuid is empty", async () => {
       await expect(
diff --git a/extensions/bluebubbles/src/chat.ts b/extensions/bluebubbles/src/chat.ts
index 354e7076722..f5f83b1b6ae 100644
--- a/extensions/bluebubbles/src/chat.ts
+++ b/extensions/bluebubbles/src/chat.ts
@@ -26,6 +26,41 @@ function assertPrivateApiEnabled(accountId: string, feature: string): void {
   }
 }
 
+function resolvePartIndex(partIndex: number | undefined): number {
+  return typeof partIndex === "number" ? partIndex : 0;
+}
+
+async function sendPrivateApiJsonRequest(params: {
+  opts: BlueBubblesChatOpts;
+  feature: string;
+  action: string;
+  path: string;
+  method: "POST" | "PUT" | "DELETE";
+  payload?: unknown;
+}): Promise<void> {
+  const { baseUrl, password, accountId } = resolveAccount(params.opts);
+  assertPrivateApiEnabled(accountId, params.feature);
+  const url = buildBlueBubblesApiUrl({
+    baseUrl,
+    path: params.path,
+    password,
+  });
+
+  const request: RequestInit = { method: params.method };
+  if (params.payload !== undefined) {
+    request.headers = { "Content-Type": "application/json" };
+    request.body = JSON.stringify(params.payload);
+  }
+
+  const res = await blueBubblesFetchWithTimeout(url, request, params.opts.timeoutMs);
+  if (!res.ok) {
+    const errorText = await res.text().catch(() => "");
+    throw new Error(
+      `BlueBubbles ${params.action} failed (${res.status}): ${errorText || "unknown"}`,
+    );
+  }
+}
+
 export async function markBlueBubblesChatRead(
   chatGuid: string,
   opts: BlueBubblesChatOpts = {},
@@ -97,34 +132,18 @@ export async function editBlueBubblesMessage(
     throw new Error("BlueBubbles edit requires newText");
   }
 
-  const { baseUrl, password, accountId } = resolveAccount(opts);
-  assertPrivateApiEnabled(accountId, "edit");
-  const url = buildBlueBubblesApiUrl({
-    baseUrl,
+  await sendPrivateApiJsonRequest({
+    opts,
+    feature: "edit",
+    action: "edit",
+    method: "POST",
     path: `/api/v1/message/${encodeURIComponent(trimmedGuid)}/edit`,
-    password,
-  });
-
-  const payload = {
-    editedMessage: trimmedText,
-    backwardsCompatibilityMessage: opts.backwardsCompatMessage ?? `Edited to: ${trimmedText}`,
-    partIndex: typeof opts.partIndex === "number" ? opts.partIndex : 0,
-  };
-
-  const res = await blueBubblesFetchWithTimeout(
-    url,
-    {
-      method: "POST",
-      headers: { "Content-Type": "application/json" },
-      body: JSON.stringify(payload),
+    payload: {
+      editedMessage: trimmedText,
+      backwardsCompatibilityMessage: opts.backwardsCompatMessage ?? `Edited to: ${trimmedText}`,
+      partIndex: resolvePartIndex(opts.partIndex),
     },
-    opts.timeoutMs,
-  );
-
-  if (!res.ok) {
-    const errorText = await res.text().catch(() => "");
-    throw new Error(`BlueBubbles edit failed (${res.status}): ${errorText || "unknown"}`);
-  }
+  });
 }
 
 /**
@@ -140,32 +159,14 @@ export async function unsendBlueBubblesMessage(
     throw new Error("BlueBubbles unsend requires messageGuid");
   }
 
-  const { baseUrl, password, accountId } = resolveAccount(opts);
-  assertPrivateApiEnabled(accountId, "unsend");
-  const url = buildBlueBubblesApiUrl({
-    baseUrl,
+  await sendPrivateApiJsonRequest({
+    opts,
+    feature: "unsend",
+    action: "unsend",
+    method: "POST",
     path: `/api/v1/message/${encodeURIComponent(trimmedGuid)}/unsend`,
-    password,
+    payload: { partIndex: resolvePartIndex(opts.partIndex) },
   });
-
-  const payload = {
-    partIndex: typeof opts.partIndex === "number" ? opts.partIndex : 0,
-  };
-
-  const res = await blueBubblesFetchWithTimeout(
-    url,
-    {
-      method: "POST",
-      headers: { "Content-Type": "application/json" },
-      body: JSON.stringify(payload),
-    },
-    opts.timeoutMs,
-  );
-
-  if (!res.ok) {
-    const errorText = await res.text().catch(() => "");
-    throw new Error(`BlueBubbles unsend failed (${res.status}): ${errorText || "unknown"}`);
-  }
 }
 
 /**
@@ -181,28 +182,14 @@ export async function renameBlueBubblesChat(
     throw new Error("BlueBubbles rename requires chatGuid");
   }
 
-  const { baseUrl, password, accountId } = resolveAccount(opts);
-  assertPrivateApiEnabled(accountId, "renameGroup");
-  const url = buildBlueBubblesApiUrl({
-    baseUrl,
+  await sendPrivateApiJsonRequest({
+    opts,
+    feature: "renameGroup",
+    action: "rename",
+    method: "PUT",
     path: `/api/v1/chat/${encodeURIComponent(trimmedGuid)}`,
-    password,
+    payload: { displayName },
   });
-
-  const res = await blueBubblesFetchWithTimeout(
-    url,
-    {
-      method: "PUT",
-      headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ displayName }),
-    },
-    opts.timeoutMs,
-  );
-
-  if (!res.ok) {
-    const errorText = await res.text().catch(() => "");
-    throw new Error(`BlueBubbles rename failed (${res.status}): ${errorText || "unknown"}`);
-  }
 }
 
 /**
@@ -222,28 +209,14 @@ export async function addBlueBubblesParticipant(
     throw new Error("BlueBubbles addParticipant requires address");
   }
 
-  const { baseUrl, password, accountId } = resolveAccount(opts);
-  assertPrivateApiEnabled(accountId, "addParticipant");
-  const url = buildBlueBubblesApiUrl({
-    baseUrl,
+  await sendPrivateApiJsonRequest({
+    opts,
+    feature: "addParticipant",
+    action: "addParticipant",
+    method: "POST",
     path: `/api/v1/chat/${encodeURIComponent(trimmedGuid)}/participant`,
-    password,
+    payload: { address: trimmedAddress },
   });
-
-  const res = await blueBubblesFetchWithTimeout(
-    url,
-    {
-      method: "POST",
-      headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ address: trimmedAddress }),
-    },
-    opts.timeoutMs,
-  );
-
-  if (!res.ok) {
-    const errorText = await res.text().catch(() => "");
-    throw new Error(`BlueBubbles addParticipant failed (${res.status}): ${errorText || "unknown"}`);
-  }
 }
 
 /**
@@ -263,30 +236,14 @@ export async function removeBlueBubblesParticipant(
     throw new Error("BlueBubbles removeParticipant requires address");
   }
 
-  const { baseUrl, password, accountId } = resolveAccount(opts);
-  assertPrivateApiEnabled(accountId, "removeParticipant");
-  const url = buildBlueBubblesApiUrl({
-    baseUrl,
+  await sendPrivateApiJsonRequest({
+    opts,
+    feature: "removeParticipant",
+    action: "removeParticipant",
+    method: "DELETE",
     path: `/api/v1/chat/${encodeURIComponent(trimmedGuid)}/participant`,
-    password,
+    payload: { address: trimmedAddress },
   });
-
-  const res = await blueBubblesFetchWithTimeout(
-    url,
-    {
-      method: "DELETE",
-      headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ address: trimmedAddress }),
-    },
-    opts.timeoutMs,
-  );
-
-  if (!res.ok) {
-    const errorText = await res.text().catch(() => "");
-    throw new Error(
-      `BlueBubbles removeParticipant failed (${res.status}): ${errorText || "unknown"}`,
-    );
-  }
 }
 
 /**
@@ -301,20 +258,13 @@ export async function leaveBlueBubblesChat(
     throw new Error("BlueBubbles leaveChat requires chatGuid");
   }
 
-  const { baseUrl, password, accountId } = resolveAccount(opts);
-  assertPrivateApiEnabled(accountId, "leaveGroup");
-  const url = buildBlueBubblesApiUrl({
-    baseUrl,
+  await sendPrivateApiJsonRequest({
+    opts,
+    feature: "leaveGroup",
+    action: "leaveChat",
+    method: "POST",
     path: `/api/v1/chat/${encodeURIComponent(trimmedGuid)}/leave`,
-    password,
   });
-
-  const res = await blueBubblesFetchWithTimeout(url, { method: "POST" }, opts.timeoutMs);
-
-  if (!res.ok) {
-    const errorText = await res.text().catch(() => "");
-    throw new Error(`BlueBubbles leaveChat failed (${res.status}): ${errorText || "unknown"}`);
-  }
 }
 
 /**
diff --git a/extensions/bluebubbles/src/reactions.test.ts b/extensions/bluebubbles/src/reactions.test.ts
index 643a926b889..0ea99f911f6 100644
--- a/extensions/bluebubbles/src/reactions.test.ts
+++ b/extensions/bluebubbles/src/reactions.test.ts
@@ -1,17 +1,10 @@
 import { describe, expect, it, vi, beforeEach, afterEach } from "vitest";
 import { sendBlueBubblesReaction } from "./reactions.js";
 
-vi.mock("./accounts.js", () => ({
-  resolveBlueBubblesAccount: vi.fn(({ cfg, accountId }) => {
-    const config = cfg?.channels?.bluebubbles ?? {};
-    return {
-      accountId: accountId ?? "default",
-      enabled: config.enabled !== false,
-      configured: Boolean(config.serverUrl && config.password),
-      config,
-    };
-  }),
-}));
+vi.mock("./accounts.js", async () => {
+  const { createBlueBubblesAccountsMockModule } = await import("./test-harness.js");
+  return createBlueBubblesAccountsMockModule();
+});
 
 const mockFetch = vi.fn();
 
diff --git a/extensions/bluebubbles/src/targets.ts b/extensions/bluebubbles/src/targets.ts
index be9d0fa6770..b136de3095c 100644
--- a/extensions/bluebubbles/src/targets.ts
+++ b/extensions/bluebubbles/src/targets.ts
@@ -78,6 +78,40 @@ function looksLikeRawChatIdentifier(value: string): boolean {
   return CHAT_IDENTIFIER_UUID_RE.test(trimmed) || CHAT_IDENTIFIER_HEX_RE.test(trimmed);
 }
 
+function parseGroupTarget(params: {
+  trimmed: string;
+  lower: string;
+  requireValue: boolean;
+}): { kind: "chat_id"; chatId: number } | { kind: "chat_guid"; chatGuid: string } | null {
+  if (!params.lower.startsWith("group:")) {
+    return null;
+  }
+  const value = stripPrefix(params.trimmed, "group:");
+  const chatId = Number.parseInt(value, 10);
+  if (Number.isFinite(chatId)) {
+    return { kind: "chat_id", chatId };
+  }
+  if (value) {
+    return { kind: "chat_guid", chatGuid: value };
+  }
+  if (params.requireValue) {
+    throw new Error("group target is required");
+  }
+  return null;
+}
+
+function parseRawChatIdentifierTarget(
+  trimmed: string,
+): { kind: "chat_identifier"; chatIdentifier: string } | null {
+  if (/^chat\d+$/i.test(trimmed)) {
+    return { kind: "chat_identifier", chatIdentifier: trimmed };
+  }
+  if (looksLikeRawChatIdentifier(trimmed)) {
+    return { kind: "chat_identifier", chatIdentifier: trimmed };
+  }
+  return null;
+}
+
 export function normalizeBlueBubblesHandle(raw: string): string {
   const trimmed = raw.trim();
   if (!trimmed) {
@@ -239,16 +273,9 @@ export function parseBlueBubblesTarget(raw: string): BlueBubblesTarget {
     return chatTarget;
   }
 
-  if (lower.startsWith("group:")) {
-    const value = stripPrefix(trimmed, "group:");
-    const chatId = Number.parseInt(value, 10);
-    if (Number.isFinite(chatId)) {
-      return { kind: "chat_id", chatId };
-    }
-    if (!value) {
-      throw new Error("group target is required");
-    }
-    return { kind: "chat_guid", chatGuid: value };
+  const groupTarget = parseGroupTarget({ trimmed, lower, requireValue: true });
+  if (groupTarget) {
+    return groupTarget;
   }
 
   const rawChatGuid = parseRawChatGuid(trimmed);
@@ -256,15 +283,9 @@ export function parseBlueBubblesTarget(raw: string): BlueBubblesTarget {
     return { kind: "chat_guid", chatGuid: rawChatGuid };
   }
 
-  // Handle chat<digits> pattern (e.g., "chat660250192681427962") as chat_identifier
-  // These are BlueBubbles chat identifiers (the third part of a chat GUID), not numeric IDs
-  if (/^chat\d+$/i.test(trimmed)) {
-    return { kind: "chat_identifier", chatIdentifier: trimmed };
-  }
-
-  // Handle UUID/hex chat identifiers (e.g., "8b9c1a10536d4d86a336ea03ab7151cc")
-  if (looksLikeRawChatIdentifier(trimmed)) {
-    return { kind: "chat_identifier", chatIdentifier: trimmed };
+  const rawChatIdentifierTarget = parseRawChatIdentifierTarget(trimmed);
+  if (rawChatIdentifierTarget) {
+    return rawChatIdentifierTarget;
   }
 
   return { kind: "handle", to: trimmed, service: "auto" };
@@ -298,26 +319,14 @@ export function parseBlueBubblesAllowTarget(raw: string): BlueBubblesAllowTarget
     return chatTarget;
   }
 
-  if (lower.startsWith("group:")) {
-    const value = stripPrefix(trimmed, "group:");
-    const chatId = Number.parseInt(value, 10);
-    if (Number.isFinite(chatId)) {
-      return { kind: "chat_id", chatId };
-    }
-    if (value) {
-      return { kind: "chat_guid", chatGuid: value };
-    }
+  const groupTarget = parseGroupTarget({ trimmed, lower, requireValue: false });
+  if (groupTarget) {
+    return groupTarget;
   }
 
-  // Handle chat<digits> pattern (e.g., "chat660250192681427962") as chat_identifier
-  // These are BlueBubbles chat identifiers (the third part of a chat GUID), not numeric IDs
-  if (/^chat\d+$/i.test(trimmed)) {
-    return { kind: "chat_identifier", chatIdentifier: trimmed };
-  }
-
-  // Handle UUID/hex chat identifiers (e.g., "8b9c1a10536d4d86a336ea03ab7151cc")
-  if (looksLikeRawChatIdentifier(trimmed)) {
-    return { kind: "chat_identifier", chatIdentifier: trimmed };
+  const rawChatIdentifierTarget = parseRawChatIdentifierTarget(trimmed);
+  if (rawChatIdentifierTarget) {
+    return rawChatIdentifierTarget;
   }
 
   return { kind: "handle", handle: normalizeBlueBubblesHandle(trimmed) };