diff --git a/extensions/bluebubbles/src/attachments.test.ts b/extensions/bluebubbles/src/attachments.test.ts
index 47f6e6d03cc..17060229930 100644
--- a/extensions/bluebubbles/src/attachments.test.ts
+++ b/extensions/bluebubbles/src/attachments.test.ts
@@ -4,7 +4,12 @@ import "./test-mocks.js";
 import { downloadBlueBubblesAttachment, sendBlueBubblesAttachment } from "./attachments.js";
 import { getCachedBlueBubblesPrivateApiStatus } from "./probe.js";
 import { setBlueBubblesRuntime } from "./runtime.js";
-import { installBlueBubblesFetchTestHooks } from "./test-harness.js";
+import {
+  BLUE_BUBBLES_PRIVATE_API_STATUS,
+  installBlueBubblesFetchTestHooks,
+  mockBlueBubblesPrivateApiStatus,
+  mockBlueBubblesPrivateApiStatusOnce,
+} from "./test-harness.js";
 import type { BlueBubblesAttachment } from "./types.js";
 
 const mockFetch = vi.fn();
@@ -278,7 +283,10 @@ describe("sendBlueBubblesAttachment", () => {
     fetchRemoteMediaMock.mockClear();
     setBlueBubblesRuntime(runtimeStub);
     vi.mocked(getCachedBlueBubblesPrivateApiStatus).mockReset();
-    vi.mocked(getCachedBlueBubblesPrivateApiStatus).mockReturnValue(null);
+    mockBlueBubblesPrivateApiStatus(
+      vi.mocked(getCachedBlueBubblesPrivateApiStatus),
+      BLUE_BUBBLES_PRIVATE_API_STATUS.unknown,
+    );
   });
 
   afterEach(() => {
@@ -381,7 +389,10 @@ describe("sendBlueBubblesAttachment", () => {
   });
 
   it("downgrades attachment reply threading when private API is disabled", async () => {
-    vi.mocked(getCachedBlueBubblesPrivateApiStatus).mockReturnValueOnce(false);
+    mockBlueBubblesPrivateApiStatusOnce(
+      vi.mocked(getCachedBlueBubblesPrivateApiStatus),
+      BLUE_BUBBLES_PRIVATE_API_STATUS.disabled,
+    );
     mockFetch.mockResolvedValueOnce({
       ok: true,
       text: () => Promise.resolve(JSON.stringify({ messageId: "msg-4" })),
@@ -402,4 +413,32 @@ describe("sendBlueBubblesAttachment", () => {
     expect(bodyText).not.toContain('name="selectedMessageGuid"');
     expect(bodyText).not.toContain('name="partIndex"');
   });
+
+  it("warns and downgrades attachment reply threading when private API status is unknown", async () => {
+    const runtimeLog = vi.fn();
+    setBlueBubblesRuntime({
+      ...runtimeStub,
+      log: runtimeLog,
+    } as unknown as PluginRuntime);
+    mockFetch.mockResolvedValueOnce({
+      ok: true,
+      text: () => Promise.resolve(JSON.stringify({ messageId: "msg-5" })),
+    });
+
+    await sendBlueBubblesAttachment({
+      to: "chat_guid:iMessage;-;+15551234567",
+      buffer: new Uint8Array([1, 2, 3]),
+      filename: "photo.jpg",
+      contentType: "image/jpeg",
+      replyToMessageGuid: "reply-guid-unknown",
+      opts: { serverUrl: "http://localhost:1234", password: "test" },
+    });
+
+    expect(runtimeLog).toHaveBeenCalledTimes(1);
+    expect(runtimeLog.mock.calls[0]?.[0]).toContain("Private API status unknown");
+    const body = mockFetch.mock.calls[0][1]?.body as Uint8Array;
+    const bodyText = decodeBody(body);
+    expect(bodyText).not.toContain('name="selectedMessageGuid"');
+    expect(bodyText).not.toContain('name="partIndex"');
+  });
 });
diff --git a/extensions/bluebubbles/src/attachments.ts b/extensions/bluebubbles/src/attachments.ts
index 5d5841c8295..3b8850f2154 100644
--- a/extensions/bluebubbles/src/attachments.ts
+++ b/extensions/bluebubbles/src/attachments.ts
@@ -3,9 +3,12 @@ import path from "node:path";
 import type { OpenClawConfig } from "openclaw/plugin-sdk";
 import { resolveBlueBubblesServerAccount } from "./account-resolve.js";
 import { postMultipartFormData } from "./multipart.js";
-import { getCachedBlueBubblesPrivateApiStatus } from "./probe.js";
+import {
+  getCachedBlueBubblesPrivateApiStatus,
+  isBlueBubblesPrivateApiStatusEnabled,
+} from "./probe.js";
 import { resolveRequestUrl } from "./request-url.js";
-import { getBlueBubblesRuntime } from "./runtime.js";
+import { getBlueBubblesRuntime, warnBlueBubbles } from "./runtime.js";
 import { extractBlueBubblesMessageId, resolveBlueBubblesSendTarget } from "./send-helpers.js";
 import { resolveChatGuidForTarget } from "./send.js";
 import {
@@ -139,6 +142,7 @@ export async function sendBlueBubblesAttachment(params: {
   contentType = contentType?.trim() || undefined;
   const { baseUrl, password, accountId } = resolveAccount(opts);
   const privateApiStatus = getCachedBlueBubblesPrivateApiStatus(accountId);
+  const privateApiEnabled = isBlueBubblesPrivateApiStatusEnabled(privateApiStatus);
 
   // Validate voice memo format when requested (BlueBubbles converts MP3 -> CAF when isAudioMessage).
   const isAudioMessage = wantsVoice;
@@ -207,7 +211,7 @@ export async function sendBlueBubblesAttachment(params: {
   addField("chatGuid", chatGuid);
   addField("name", filename);
   addField("tempGuid", `temp-${Date.now()}-${crypto.randomUUID().slice(0, 8)}`);
-  if (privateApiStatus === true) {
+  if (privateApiEnabled) {
     addField("method", "private-api");
   }
 
@@ -217,9 +221,13 @@ export async function sendBlueBubblesAttachment(params: {
   }
 
   const trimmedReplyTo = replyToMessageGuid?.trim();
-  if (trimmedReplyTo && privateApiStatus === true) {
+  if (trimmedReplyTo && privateApiEnabled) {
     addField("selectedMessageGuid", trimmedReplyTo);
     addField("partIndex", typeof replyToPartIndex === "number" ? String(replyToPartIndex) : "0");
+  } else if (trimmedReplyTo && privateApiStatus === null) {
+    warnBlueBubbles(
+      "Private API status unknown; sending attachment without reply threading metadata. Run a status probe to restore private-api reply features.",
+    );
   }
 
   // Add optional caption
diff --git a/extensions/bluebubbles/src/monitor-processing.ts b/extensions/bluebubbles/src/monitor-processing.ts
index 8f58c7ab552..67fb50a78c6 100644
--- a/extensions/bluebubbles/src/monitor-processing.ts
+++ b/extensions/bluebubbles/src/monitor-processing.ts
@@ -39,7 +39,7 @@ import type {
   BlueBubblesRuntimeEnv,
   WebhookTarget,
 } from "./monitor-shared.js";
-import { getCachedBlueBubblesPrivateApiStatus } from "./probe.js";
+import { isBlueBubblesPrivateApiEnabled } from "./probe.js";
 import { normalizeBlueBubblesReactionInput, sendBlueBubblesReaction } from "./reactions.js";
 import { resolveChatGuidForTarget, sendMessageBlueBubbles } from "./send.js";
 import { formatBlueBubblesChatTarget, isAllowedBlueBubblesSender } from "./targets.js";
@@ -420,7 +420,7 @@ export async function processMessage(
   target: WebhookTarget,
 ): Promise<void> {
   const { account, config, runtime, core, statusSink } = target;
-  const privateApiEnabled = getCachedBlueBubblesPrivateApiStatus(account.accountId) === true;
+  const privateApiEnabled = isBlueBubblesPrivateApiEnabled(account.accountId);
 
   const groupFlag = resolveGroupFlagFromChatGuid(message.chatGuid);
   const isGroup = typeof groupFlag === "boolean" ? groupFlag : message.isGroup;
diff --git a/extensions/bluebubbles/src/probe.ts b/extensions/bluebubbles/src/probe.ts
index e60c47dc643..5ee95a26821 100644
--- a/extensions/bluebubbles/src/probe.ts
+++ b/extensions/bluebubbles/src/probe.ts
@@ -96,6 +96,14 @@ export function getCachedBlueBubblesPrivateApiStatus(accountId?: string): boolea
   return info.private_api;
 }
 
+export function isBlueBubblesPrivateApiStatusEnabled(status: boolean | null): boolean {
+  return status === true;
+}
+
+export function isBlueBubblesPrivateApiEnabled(accountId?: string): boolean {
+  return isBlueBubblesPrivateApiStatusEnabled(getCachedBlueBubblesPrivateApiStatus(accountId));
+}
+
 /**
  * Parse macOS version string (e.g., "15.0.1" or "26.0") into major version number.
  */
diff --git a/extensions/bluebubbles/src/runtime.ts b/extensions/bluebubbles/src/runtime.ts
index 2f183c74e4d..439e62d2503 100644
--- a/extensions/bluebubbles/src/runtime.ts
+++ b/extensions/bluebubbles/src/runtime.ts
@@ -6,9 +6,27 @@ export function setBlueBubblesRuntime(next: PluginRuntime): void {
   runtime = next;
 }
 
+export function clearBlueBubblesRuntime(): void {
+  runtime = null;
+}
+
+export function tryGetBlueBubblesRuntime(): PluginRuntime | null {
+  return runtime;
+}
+
 export function getBlueBubblesRuntime(): PluginRuntime {
   if (!runtime) {
     throw new Error("BlueBubbles runtime not initialized");
   }
   return runtime;
 }
+
+export function warnBlueBubbles(message: string): void {
+  const formatted = `[bluebubbles] ${message}`;
+  const log = runtime?.log;
+  if (typeof log === "function") {
+    log(formatted);
+    return;
+  }
+  console.warn(formatted);
+}
diff --git a/extensions/bluebubbles/src/send.test.ts b/extensions/bluebubbles/src/send.test.ts
index 7a2edeaf850..9872372641e 100644
--- a/extensions/bluebubbles/src/send.test.ts
+++ b/extensions/bluebubbles/src/send.test.ts
@@ -1,15 +1,22 @@
+import type { PluginRuntime } from "openclaw/plugin-sdk";
 import { beforeEach, describe, expect, it, vi } from "vitest";
 import "./test-mocks.js";
 import { getCachedBlueBubblesPrivateApiStatus } from "./probe.js";
+import { clearBlueBubblesRuntime, setBlueBubblesRuntime } from "./runtime.js";
 import { sendMessageBlueBubbles, resolveChatGuidForTarget } from "./send.js";
-import { installBlueBubblesFetchTestHooks } from "./test-harness.js";
+import {
+  BLUE_BUBBLES_PRIVATE_API_STATUS,
+  installBlueBubblesFetchTestHooks,
+  mockBlueBubblesPrivateApiStatusOnce,
+} from "./test-harness.js";
 import type { BlueBubblesSendTarget } from "./types.js";
 
 const mockFetch = vi.fn();
+const privateApiStatusMock = vi.mocked(getCachedBlueBubblesPrivateApiStatus);
 
 installBlueBubblesFetchTestHooks({
   mockFetch,
-  privateApiStatusMock: vi.mocked(getCachedBlueBubblesPrivateApiStatus),
+  privateApiStatusMock,
 });
 
 function mockResolvedHandleTarget(
@@ -527,7 +534,10 @@ describe("send", () => {
     });
 
     it("uses private-api when reply metadata is present", async () => {
-      vi.mocked(getCachedBlueBubblesPrivateApiStatus).mockReturnValueOnce(true);
+      mockBlueBubblesPrivateApiStatusOnce(
+        privateApiStatusMock,
+        BLUE_BUBBLES_PRIVATE_API_STATUS.enabled,
+      );
       mockResolvedHandleTarget();
       mockSendResponse({ data: { guid: "msg-uuid-124" } });
 
@@ -549,7 +559,10 @@ describe("send", () => {
     });
 
     it("downgrades threaded reply to plain send when private API is disabled", async () => {
-      vi.mocked(getCachedBlueBubblesPrivateApiStatus).mockReturnValueOnce(false);
+      mockBlueBubblesPrivateApiStatusOnce(
+        privateApiStatusMock,
+        BLUE_BUBBLES_PRIVATE_API_STATUS.disabled,
+      );
       mockResolvedHandleTarget();
       mockSendResponse({ data: { guid: "msg-uuid-plain" } });
 
@@ -569,7 +582,10 @@ describe("send", () => {
     });
 
     it("normalizes effect names and uses private-api for effects", async () => {
-      vi.mocked(getCachedBlueBubblesPrivateApiStatus).mockReturnValueOnce(true);
+      mockBlueBubblesPrivateApiStatusOnce(
+        privateApiStatusMock,
+        BLUE_BUBBLES_PRIVATE_API_STATUS.enabled,
+      );
       mockResolvedHandleTarget();
       mockSendResponse({ data: { guid: "msg-uuid-125" } });
 
@@ -589,6 +605,8 @@ describe("send", () => {
     });
 
     it("warns and downgrades private-api features when status is unknown", async () => {
+      const runtimeLog = vi.fn();
+      setBlueBubblesRuntime({ log: runtimeLog } as unknown as PluginRuntime);
       const warnSpy = vi.spyOn(console, "warn").mockImplementation(() => {});
       mockResolvedHandleTarget();
       mockSendResponse({ data: { guid: "msg-uuid-unknown" } });
@@ -602,8 +620,9 @@ describe("send", () => {
         });
 
         expect(result.messageId).toBe("msg-uuid-unknown");
-        expect(warnSpy).toHaveBeenCalledTimes(1);
-        expect(warnSpy.mock.calls[0]?.[0]).toContain("Private API status unknown");
+        expect(runtimeLog).toHaveBeenCalledTimes(1);
+        expect(runtimeLog.mock.calls[0]?.[0]).toContain("Private API status unknown");
+        expect(warnSpy).not.toHaveBeenCalled();
 
         const sendCall = mockFetch.mock.calls[1];
         const body = JSON.parse(sendCall[1].body);
@@ -612,6 +631,7 @@ describe("send", () => {
         expect(body.partIndex).toBeUndefined();
         expect(body.effectId).toBeUndefined();
       } finally {
+        clearBlueBubblesRuntime();
         warnSpy.mockRestore();
       }
     });
diff --git a/extensions/bluebubbles/src/send.ts b/extensions/bluebubbles/src/send.ts
index 1530d1702c2..4719fb416f8 100644
--- a/extensions/bluebubbles/src/send.ts
+++ b/extensions/bluebubbles/src/send.ts
@@ -2,7 +2,11 @@ import crypto from "node:crypto";
 import type { OpenClawConfig } from "openclaw/plugin-sdk";
 import { stripMarkdown } from "openclaw/plugin-sdk";
 import { resolveBlueBubblesAccount } from "./accounts.js";
-import { getCachedBlueBubblesPrivateApiStatus } from "./probe.js";
+import {
+  getCachedBlueBubblesPrivateApiStatus,
+  isBlueBubblesPrivateApiStatusEnabled,
+} from "./probe.js";
+import { warnBlueBubbles } from "./runtime.js";
 import { extractBlueBubblesMessageId, resolveBlueBubblesSendTarget } from "./send-helpers.js";
 import { extractHandleFromChatGuid, normalizeBlueBubblesHandle } from "./targets.js";
 import {
@@ -71,6 +75,38 @@ function resolveEffectId(raw?: string): string | undefined {
   return raw;
 }
 
+type PrivateApiDecision = {
+  canUsePrivateApi: boolean;
+  throwEffectDisabledError: boolean;
+  warningMessage?: string;
+};
+
+function resolvePrivateApiDecision(params: {
+  privateApiStatus: boolean | null;
+  wantsReplyThread: boolean;
+  wantsEffect: boolean;
+}): PrivateApiDecision {
+  const { privateApiStatus, wantsReplyThread, wantsEffect } = params;
+  const needsPrivateApi = wantsReplyThread || wantsEffect;
+  const canUsePrivateApi =
+    needsPrivateApi && isBlueBubblesPrivateApiStatusEnabled(privateApiStatus);
+  const throwEffectDisabledError = wantsEffect && privateApiStatus === false;
+  if (!needsPrivateApi || privateApiStatus !== null) {
+    return { canUsePrivateApi, throwEffectDisabledError };
+  }
+  const requested = [
+    wantsReplyThread ? "reply threading" : null,
+    wantsEffect ? "message effects" : null,
+  ]
+    .filter(Boolean)
+    .join(" + ");
+  return {
+    canUsePrivateApi,
+    throwEffectDisabledError,
+    warningMessage: `Private API status unknown; sending without ${requested}. Run a status probe to restore private-api features.`,
+  };
+}
+
 type BlueBubblesChatRecord = Record<string, unknown>;
 
 function extractChatGuid(chat: BlueBubblesChatRecord): string | null {
@@ -372,41 +408,36 @@ export async function sendMessageBlueBubbles(
   const effectId = resolveEffectId(opts.effectId);
   const wantsReplyThread = Boolean(opts.replyToMessageGuid?.trim());
   const wantsEffect = Boolean(effectId);
-  const needsPrivateApi = wantsReplyThread || wantsEffect;
-  const canUsePrivateApi = needsPrivateApi && privateApiStatus === true;
-  if (wantsEffect && privateApiStatus === false) {
+  const privateApiDecision = resolvePrivateApiDecision({
+    privateApiStatus,
+    wantsReplyThread,
+    wantsEffect,
+  });
+  if (privateApiDecision.throwEffectDisabledError) {
     throw new Error(
       "BlueBubbles send failed: reply/effect requires Private API, but it is disabled on the BlueBubbles server.",
     );
   }
-  if (needsPrivateApi && privateApiStatus === null) {
-    const requested = [
-      wantsReplyThread ? "reply threading" : null,
-      wantsEffect ? "message effects" : null,
-    ]
-      .filter(Boolean)
-      .join(" + ");
-    console.warn(
-      `[bluebubbles] Private API status unknown; sending without ${requested}. Run a status probe to restore private-api features.`,
-    );
+  if (privateApiDecision.warningMessage) {
+    warnBlueBubbles(privateApiDecision.warningMessage);
   }
   const payload: Record<string, unknown> = {
     chatGuid,
     tempGuid: crypto.randomUUID(),
     message: strippedText,
   };
-  if (canUsePrivateApi) {
+  if (privateApiDecision.canUsePrivateApi) {
     payload.method = "private-api";
   }
 
   // Add reply threading support
-  if (wantsReplyThread && canUsePrivateApi) {
+  if (wantsReplyThread && privateApiDecision.canUsePrivateApi) {
     payload.selectedMessageGuid = opts.replyToMessageGuid;
     payload.partIndex = typeof opts.replyToPartIndex === "number" ? opts.replyToPartIndex : 0;
   }
 
   // Add message effects support
-  if (effectId && canUsePrivateApi) {
+  if (effectId && privateApiDecision.canUsePrivateApi) {
     payload.effectId = effectId;
   }
 
diff --git a/extensions/bluebubbles/src/test-harness.ts b/extensions/bluebubbles/src/test-harness.ts
index 627b04197ba..7c6938a9681 100644
--- a/extensions/bluebubbles/src/test-harness.ts
+++ b/extensions/bluebubbles/src/test-harness.ts
@@ -1,6 +1,31 @@
 import type { Mock } from "vitest";
 import { afterEach, beforeEach, vi } from "vitest";
 
+export const BLUE_BUBBLES_PRIVATE_API_STATUS = {
+  enabled: true as const,
+  disabled: false as const,
+  unknown: null as const,
+};
+
+type BlueBubblesPrivateApiStatusMock = {
+  mockReturnValue: (value: boolean | null) => unknown;
+  mockReturnValueOnce: (value: boolean | null) => unknown;
+};
+
+export function mockBlueBubblesPrivateApiStatus(
+  mock: Pick<BlueBubblesPrivateApiStatusMock, "mockReturnValue">,
+  value: boolean | null,
+) {
+  mock.mockReturnValue(value);
+}
+
+export function mockBlueBubblesPrivateApiStatusOnce(
+  mock: Pick<BlueBubblesPrivateApiStatusMock, "mockReturnValueOnce">,
+  value: boolean | null,
+) {
+  mock.mockReturnValueOnce(value);
+}
+
 export function resolveBlueBubblesAccountFromConfig(params: {
   cfg?: { channels?: { bluebubbles?: Record<string, unknown> } };
   accountId?: string;
@@ -26,7 +51,9 @@ type BlueBubblesProbeMockModule = {
 
 export function createBlueBubblesProbeMockModule(): BlueBubblesProbeMockModule {
   return {
-    getCachedBlueBubblesPrivateApiStatus: vi.fn().mockReturnValue(null),
+    getCachedBlueBubblesPrivateApiStatus: vi
+      .fn()
+      .mockReturnValue(BLUE_BUBBLES_PRIVATE_API_STATUS.unknown),
   };
 }
 
@@ -41,7 +68,7 @@ export function installBlueBubblesFetchTestHooks(params: {
     vi.stubGlobal("fetch", params.mockFetch);
     params.mockFetch.mockReset();
     params.privateApiStatusMock.mockReset();
-    params.privateApiStatusMock.mockReturnValue(null);
+    params.privateApiStatusMock.mockReturnValue(BLUE_BUBBLES_PRIVATE_API_STATUS.unknown);
   });
 
   afterEach(() => {