diff --git a/index.ts b/index.ts
index 07f2e28..78a700c 100644
--- a/index.ts
+++ b/index.ts
@@ -26,6 +26,49 @@ const plugin = {
       return await controller.handleInboundClaim(event);
     });
 
+    const registerInternalHook = (
+      api as OpenClawPluginApi & {
+        registerHook?: (
+          events: string | string[],
+          handler: (event: unknown) => Promise<void> | void,
+          opts?: { name?: string; description?: string },
+        ) => void;
+      }
+    ).registerHook;
+    if (typeof registerInternalHook === "function") {
+      registerInternalHook(
+        "message:transcribed",
+        async (event) => {
+          await controller.handleMessageTranscribed(event as {
+            type?: string;
+            action?: string;
+            sessionKey?: string;
+            context?: Record<string, unknown>;
+          });
+        },
+        {
+          name: "codex-transcribed-handoff",
+          description: "Send transcribed inbound audio to the bound Codex thread as text.",
+        },
+      );
+
+      registerInternalHook(
+        "message:preprocessed",
+        async (event) => {
+          await controller.handleMessagePreprocessed(event as {
+            type?: string;
+            action?: string;
+            sessionKey?: string;
+            context?: Record<string, unknown>;
+          });
+        },
+        {
+          name: "codex-preprocessed-audio-fallback",
+          description: "Fallback: transcribe bound inbound audio from mediaPath when transcript events do not arrive.",
+        },
+      );
+    }
+
     api.registerInteractiveHandler({
       channel: "telegram",
       namespace: INTERACTIVE_NAMESPACE,
diff --git a/src/controller.test.ts b/src/controller.test.ts
index 6b590b2..c55f41e 100644
--- a/src/controller.test.ts
+++ b/src/controller.test.ts
@@ -3642,6 +3642,82 @@ describe("Discord controller flows", () => {
     );
   });
 
+  it("starts a turn when a message:transcribed event arrives for a bound session", async () => {
+    const { controller } = await createControllerHarness();
+    await (controller as any).store.upsertBinding({
+      conversation: {
+        channel: "telegram",
+        accountId: "default",
+        conversationId: TEST_TELEGRAM_PEER_ID,
+      },
+      sessionKey: "session-1",
+      threadId: "thread-1",
+      workspaceDir: "/repo/openclaw",
+      updatedAt: Date.now(),
+    });
+    const startTurn = vi.fn(async () => undefined);
+    (controller as any).startTurn = startTurn;
+
+    await controller.handleMessageTranscribed({
+      type: "message",
+      action: "transcribed",
+      sessionKey: "session-1",
+      context: {
+        transcript: "Hello from voice",
+        mediaType: "audio/ogg",
+      },
+    });
+
+    expect(startTurn).toHaveBeenCalledWith(
+      expect.objectContaining({
+        conversation: expect.objectContaining({ conversationId: TEST_TELEGRAM_PEER_ID }),
+        prompt: "Hello from voice",
+        reason: "inbound",
+      }),
+    );
+  });
+
+  it("falls back to runtime transcription on message:preprocessed when transcript is missing", async () => {
+    const { controller } = await createControllerHarness();
+    await (controller as any).store.upsertBinding({
+      conversation: {
+        channel: "telegram",
+        accountId: "default",
+        conversationId: TEST_TELEGRAM_PEER_ID,
+      },
+      sessionKey: "session-1",
+      threadId: "thread-1",
+      workspaceDir: "/repo/openclaw",
+      updatedAt: Date.now(),
+    });
+    const startTurn = vi.fn(async () => undefined);
+    (controller as any).startTurn = startTurn;
+    (controller as any).api.runtime = {
+      mediaUnderstanding: {
+        transcribeAudioFile: vi.fn(async () => ({ text: "Fallback transcript" })),
+      },
+    };
+    (controller as any).api.config = {};
+
+    await controller.handleMessagePreprocessed({
+      type: "message",
+      action: "preprocessed",
+      sessionKey: "session-1",
+      context: {
+        mediaPath: "/tmp/test.ogg",
+        mediaType: "audio/ogg",
+      },
+    });
+
+    expect(startTurn).toHaveBeenCalledWith(
+      expect.objectContaining({
+        conversation: expect.objectContaining({ conversationId: TEST_TELEGRAM_PEER_ID }),
+        prompt: "Fallback transcript",
+        reason: "inbound",
+      }),
+    );
+  });
+
   it("still ignores unsupported binary document attachments", async () => {
     const { controller, stateDir } = await createControllerHarness();
     const filePath = path.join(stateDir, "tmp", "manual.pdf");
diff --git a/src/controller.ts b/src/controller.ts
index c9c5249..49fac7a 100644
--- a/src/controller.ts
+++ b/src/controller.ts
@@ -1409,6 +1409,120 @@ export class CodexPluginController {
     }
   }
 
+  async handleMessageTranscribed(event: {
+    type?: string;
+    action?: string;
+    sessionKey?: string;
+    context?: Record<string, unknown>;
+  }): Promise<void> {
+    try {
+      if (!this.settings.enabled) {
+        return;
+      }
+      if (event.type !== "message" || event.action !== "transcribed") {
+        return;
+      }
+      await this.start();
+      const sessionKey = typeof event.sessionKey === "string" ? event.sessionKey : "";
+      const ctx = event.context ?? {};
+      const transcript = typeof ctx.transcript === "string" ? ctx.transcript.trim() : "";
+      if (!sessionKey || !transcript) {
+        return;
+      }
+      const binding = this.store.listBindings().find((entry) => entry.sessionKey === sessionKey) ?? null;
+      if (!binding) {
+        return;
+      }
+      const mediaType = typeof ctx.mediaType === "string" ? ctx.mediaType : "";
+      const conversation = binding.conversation;
+      this.api.logger.info(
+        `codex message:transcribed starting turn ${this.formatConversationForLog(conversation)} mediaType=${mediaType || "<unknown>"} prompt="${summarizeTextForLog(transcript)}"`,
+      );
+      await this.startTurn({
+        conversation,
+        binding,
+        workspaceDir: binding.workspaceDir,
+        prompt: transcript,
+        reason: "inbound",
+      });
+    } catch (error) {
+      const detail = error instanceof Error ? `${error.message}\n${error.stack ?? ""}`.trim() : String(error);
+      this.api.logger.error(`codex message:transcribed failed: ${detail}`);
+    }
+  }
+
+  async handleMessagePreprocessed(event: {
+    type?: string;
+    action?: string;
+    sessionKey?: string;
+    context?: Record<string, unknown>;
+  }): Promise<void> {
+    try {
+      if (!this.settings.enabled) {
+        return;
+      }
+      if (event.type !== "message" || event.action !== "preprocessed") {
+        return;
+      }
+      await this.start();
+      const sessionKey = typeof event.sessionKey === "string" ? event.sessionKey : "";
+      const ctx = event.context ?? {};
+      const mediaPath = typeof ctx.mediaPath === "string" ? ctx.mediaPath : "";
+      const mediaType = typeof ctx.mediaType === "string" ? ctx.mediaType : "";
+      const existingTranscript = typeof ctx.transcript === "string" ? ctx.transcript.trim() : "";
+      if (
+        !sessionKey ||
+        !mediaPath ||
+        (!mediaType.startsWith("audio/") && !mediaPath.match(/\.(ogg|oga|opus|mp3|wav|m4a)$/i))
+      ) {
+        return;
+      }
+      const binding = this.store.listBindings().find((entry) => entry.sessionKey === sessionKey) ?? null;
+      if (!binding) {
+        return;
+      }
+      const mediaUnderstanding = (this.api as OpenClawPluginApi & {
+        runtime?: {
+          mediaUnderstanding?: {
+            transcribeAudioFile?: (params: {
+              filePath: string;
+              cfg?: unknown;
+              mime?: string;
+            }) => Promise<{ text?: string } | null | undefined>;
+          };
+        };
+        config?: unknown;
+      }).runtime?.mediaUnderstanding;
+      const transcript =
+        existingTranscript ||
+        (await mediaUnderstanding?.transcribeAudioFile?.({
+          filePath: mediaPath,
+          cfg: (this.api as { config?: unknown }).config,
+          mime: mediaType || undefined,
+        }))?.text?.trim() ||
+        "";
+      if (!transcript) {
+        this.api.logger.warn(
+          `codex message:preprocessed audio fallback produced no transcript ${this.formatConversationForLog(binding.conversation)} mediaPath=${mediaPath}`,
+        );
+        return;
+      }
+      this.api.logger.info(
+        `codex message:preprocessed audio fallback starting turn ${this.formatConversationForLog(binding.conversation)} prompt="${summarizeTextForLog(transcript)}"`,
+      );
+      await this.startTurn({
+        conversation: binding.conversation,
+        binding,
+        workspaceDir: binding.workspaceDir,
+        prompt: transcript,
+        reason: "inbound",
+      });
+    } catch (error) {
+      const detail = error instanceof Error ? `${error.message}\n${error.stack ?? ""}`.trim() : String(error);
+      this.api.logger.error(`codex message:preprocessed fallback failed: ${detail}`);
+    }
+  }
+
   async handleTelegramInteractive(ctx: PluginInteractiveTelegramHandlerContext): Promise<void> {
     await this.start();
     const bindingApi = asScopedBindingApi(ctx);