diff --git a/src/telegram/bot/delivery.replies.ts b/src/telegram/bot/delivery.replies.ts
index 5573b2916f5..597cf1a5976 100644
--- a/src/telegram/bot/delivery.replies.ts
+++ b/src/telegram/bot/delivery.replies.ts
@@ -33,6 +33,7 @@ const CAPTION_TOO_LONG_RE = /caption is too long/i;
 type DeliveryProgress = {
   hasReplied: boolean;
   hasDelivered: boolean;
+  deliveredCount: number;
 };
 
 type ChunkTextFn = (markdown: string) => ReturnType<typeof markdownToTelegramChunks>;
@@ -85,6 +86,7 @@ function markReplyApplied(progress: DeliveryProgress, replyToId?: number): void
 
 function markDelivered(progress: DeliveryProgress): void {
   progress.hasDelivered = true;
+  progress.deliveredCount += 1;
 }
 
 async function deliverTextReply(params: {
@@ -445,6 +447,7 @@ export async function deliverReplies(params: {
   const progress: DeliveryProgress = {
     hasReplied: false,
     hasDelivered: false,
+    deliveredCount: 0,
   };
   const hookRunner = getGlobalHookRunner();
   const hasMessageSendingHooks = hookRunner?.hasHooks("message_sending") ?? false;
@@ -489,6 +492,7 @@ export async function deliverReplies(params: {
     const contentForSentHook = reply.text || "";
 
     try {
+      const deliveredCountBeforeReply = progress.deliveredCount;
       const replyToId =
         params.replyToMode === "off" ? undefined : resolveTelegramReplyId(reply.replyToId);
       const mediaList = reply.mediaUrls?.length
@@ -537,11 +541,12 @@ export async function deliverReplies(params: {
       }
 
       if (hasMessageSentHooks) {
+        const deliveredThisReply = progress.deliveredCount > deliveredCountBeforeReply;
         void hookRunner?.runMessageSent(
           {
             to: params.chatId,
             content: contentForSentHook,
-            success: true,
+            success: deliveredThisReply,
           },
           {
             channelId: "telegram",
diff --git a/src/telegram/bot/delivery.test.ts b/src/telegram/bot/delivery.test.ts
index 9fe98be8f39..26ccd4b006f 100644
--- a/src/telegram/bot/delivery.test.ts
+++ b/src/telegram/bot/delivery.test.ts
@@ -4,6 +4,11 @@ import type { RuntimeEnv } from "../../runtime.js";
 import { deliverReplies } from "./delivery.js";
 
 const loadWebMedia = vi.fn();
+const messageHookRunner = vi.hoisted(() => ({
+  hasHooks: vi.fn<(name: string) => boolean>(() => false),
+  runMessageSending: vi.fn(),
+  runMessageSent: vi.fn(),
+}));
 const baseDeliveryParams = {
   chatId: "123",
   token: "tok",
@@ -22,6 +27,10 @@ vi.mock("../../web/media.js", () => ({
   loadWebMedia: (...args: unknown[]) => loadWebMedia(...args),
 }));
 
+vi.mock("../../plugins/hook-runner-global.js", () => ({
+  getGlobalHookRunner: () => messageHookRunner,
+}));
+
 vi.mock("grammy", () => ({
   InputFile: class {
     constructor(
@@ -99,6 +108,10 @@ function createVoiceFailureHarness(params: {
 describe("deliverReplies", () => {
   beforeEach(() => {
     loadWebMedia.mockClear();
+    messageHookRunner.hasHooks.mockReset();
+    messageHookRunner.hasHooks.mockReturnValue(false);
+    messageHookRunner.runMessageSending.mockReset();
+    messageHookRunner.runMessageSent.mockReset();
   });
 
   it("skips audioAsVoice-only payloads without logging an error", async () => {
@@ -113,6 +126,29 @@ describe("deliverReplies", () => {
     expect(runtime.error).not.toHaveBeenCalled();
   });
 
+  it("reports message_sent success=false when hooks blank out a text-only reply", async () => {
+    messageHookRunner.hasHooks.mockImplementation(
+      (name: string) => name === "message_sending" || name === "message_sent",
+    );
+    messageHookRunner.runMessageSending.mockResolvedValue({ content: "" });
+
+    const runtime = createRuntime(false);
+    const sendMessage = vi.fn();
+    const bot = createBot({ sendMessage });
+
+    await deliverWith({
+      replies: [{ text: "hello" }],
+      runtime,
+      bot,
+    });
+
+    expect(sendMessage).not.toHaveBeenCalled();
+    expect(messageHookRunner.runMessageSent).toHaveBeenCalledWith(
+      expect.objectContaining({ success: false, content: "" }),
+      expect.objectContaining({ channelId: "telegram", conversationId: "123" }),
+    );
+  });
+
   it("invokes onVoiceRecording before sending a voice note", async () => {
     const events: string[] = [];
     const runtime = createRuntime(false);