diff --git a/extensions/telegram/src/bot-message-dispatch.test.ts b/extensions/telegram/src/bot-message-dispatch.test.ts
index 2936fa3bafd..70d26e95ec7 100644
--- a/extensions/telegram/src/bot-message-dispatch.test.ts
+++ b/extensions/telegram/src/bot-message-dispatch.test.ts
@@ -2124,7 +2124,6 @@ describe("dispatchTelegramMessage draft streaming", () => {
       secondStarted = resolve;
     });
     let firstAbortSignal: AbortSignal | undefined;
-    let sideAbortSignal: AbortSignal | undefined;
     dispatchReplyWithBufferedBlockDispatcher
       .mockImplementationOnce(async ({ replyOptions }) => {
         firstAbortSignal = replyOptions?.abortSignal;
@@ -2283,6 +2282,70 @@ describe("dispatchTelegramMessage draft streaming", () => {
     await Promise.all([firstPromise, sidePromise]);
   });
 
+  it("lets authorized /stop abort active non-interrupting side dispatch", async () => {
+    const historyKey = "telegram:group:-100123";
+    const groupHistories = new Map([[historyKey, []]]);
+    let sideStarted: (() => void) | undefined;
+    const sideStartGate = new Promise<void>((resolve) => {
+      sideStarted = resolve;
+    });
+    let releaseSide: (() => void) | undefined;
+    const sideGate = new Promise<void>((resolve) => {
+      releaseSide = resolve;
+    });
+    let sideAbortSignal: AbortSignal | undefined;
+    dispatchReplyWithBufferedBlockDispatcher.mockImplementationOnce(async ({ replyOptions }) => {
+      sideAbortSignal = replyOptions?.abortSignal;
+      sideStarted?.();
+      await sideGate;
+      return {
+        queuedFinal: false,
+        counts: { block: 0, final: 0, tool: 0 },
+      };
+    });
+    deliverReplies.mockResolvedValue({ delivered: true });
+
+    const createGroupContext = (messageId: number, body: string) =>
+      createContext({
+        ctxPayload: {
+          SessionKey: "agent:main:telegram:group:-100123",
+          ChatType: "group",
+          MessageSid: String(messageId),
+          RawBody: body,
+          BodyForAgent: body,
+          CommandBody: body,
+          CommandAuthorized: true,
+        } as unknown as TelegramMessageContext["ctxPayload"],
+        msg: {
+          chat: { id: -100123, type: "supergroup" },
+          message_id: messageId,
+          text: body,
+        } as unknown as TelegramMessageContext["msg"],
+        chatId: -100123,
+        isGroup: true,
+        historyKey,
+        historyLimit: 10,
+        groupHistories,
+        threadSpec: { id: undefined, scope: "none" },
+      });
+
+    const sidePromise = dispatchWithContext({
+      context: createGroupContext(100, "/btw what changed?"),
+      streamMode: "off",
+    });
+    await sideStartGate;
+    expect(sideAbortSignal?.aborted).toBe(false);
+
+    await dispatchWithContext({
+      context: createGroupContext(101, "/stop"),
+      streamMode: "off",
+    });
+
+    expect(sideAbortSignal?.aborted).toBe(true);
+    releaseSide?.();
+    await sidePromise;
+  });
+
   it("keeps queued room events abortable after their source dispatch returns", async () => {
     const historyKey = "telegram:group:-100123";
     const groupHistories = new Map([[historyKey, []]]);
diff --git a/extensions/telegram/src/telegram-reply-fence.test.ts b/extensions/telegram/src/telegram-reply-fence.test.ts
index 93132707cad..6543927e312 100644
--- a/extensions/telegram/src/telegram-reply-fence.test.ts
+++ b/extensions/telegram/src/telegram-reply-fence.test.ts
@@ -1,5 +1,11 @@
 import { describe, expect, it } from "vitest";
-import { shouldSupersedeTelegramReplyFence } from "./telegram-reply-fence.js";
+import {
+  beginTelegramReplyFence,
+  buildTelegramNonInterruptingReplyFenceKey,
+  resetTelegramReplyFenceForTests,
+  shouldSupersedeTelegramReplyFence,
+  supersedeTelegramReplyFence,
+} from "./telegram-reply-fence.js";
 
 describe("shouldSupersedeTelegramReplyFence", () => {
   it("keeps non-interrupting side and status commands from superseding active runs", () => {
@@ -44,3 +50,30 @@ describe("shouldSupersedeTelegramReplyFence", () => {
     ).toBe(true);
   });
 });
+
+describe("telegram reply fence supersede", () => {
+  it("cascades base supersedes to non-interrupting child fences", () => {
+    resetTelegramReplyFenceForTests();
+    const activeKey = "agent:main:telegram:group:-100123";
+    const sideController = new AbortController();
+    const mainController = new AbortController();
+    beginTelegramReplyFence({
+      key: activeKey,
+      supersede: true,
+      abortController: mainController,
+    });
+    beginTelegramReplyFence({
+      key: buildTelegramNonInterruptingReplyFenceKey({
+        activeKey,
+        laneKey: "default\0telegram:-100123:btw:100",
+      }),
+      supersede: false,
+      abortController: sideController,
+    });
+
+    expect(supersedeTelegramReplyFence(activeKey)).toBe(true);
+    expect(mainController.signal.aborted).toBe(true);
+    expect(sideController.signal.aborted).toBe(true);
+    resetTelegramReplyFenceForTests();
+  });
+});
diff --git a/extensions/telegram/src/telegram-reply-fence.ts b/extensions/telegram/src/telegram-reply-fence.ts
index e21f0d72b37..57eb94f99e8 100644
--- a/extensions/telegram/src/telegram-reply-fence.ts
+++ b/extensions/telegram/src/telegram-reply-fence.ts
@@ -31,7 +31,11 @@ export function buildTelegramNonInterruptingReplyFenceKey(params: {
   activeKey: string;
   laneKey: string;
 }): string {
-  return `${params.activeKey}\0non-interrupting\0${params.laneKey}`;
+  return `${buildTelegramNonInterruptingReplyFenceKeyPrefix(params.activeKey)}${params.laneKey}`;
+}
+
+function buildTelegramNonInterruptingReplyFenceKeyPrefix(activeKey: string): string {
+  return `${activeKey}\0non-interrupting\0`;
 }
 
 function normalizeTelegramFenceKey(value: unknown): string | undefined {
@@ -98,6 +102,7 @@ export function beginTelegramReplyFence(params: {
   if (params.supersede) {
     state.generation += 1;
     abortTelegramReplyFenceControllers(state);
+    supersedeTelegramNonInterruptingReplyFenceChildren(params.key);
   }
   if (params.abortController) {
     (state.abortControllers ??= new Set()).add(params.abortController);
@@ -114,7 +119,7 @@ export function beginTelegramReplyFence(params: {
   return state.generation;
 }
 
-export function supersedeTelegramReplyFence(key: string): boolean {
+function supersedeTelegramReplyFenceState(key: string): boolean {
   const state = telegramReplyFenceByKey.get(key);
   if (!state) {
     return false;
@@ -125,6 +130,23 @@ export function supersedeTelegramReplyFence(key: string): boolean {
   return true;
 }
 
+function supersedeTelegramNonInterruptingReplyFenceChildren(key: string): boolean {
+  let superseded = false;
+  const childPrefix = buildTelegramNonInterruptingReplyFenceKeyPrefix(key);
+  for (const childKey of [...telegramReplyFenceByKey.keys()]) {
+    if (childKey.startsWith(childPrefix)) {
+      superseded = supersedeTelegramReplyFenceState(childKey) || superseded;
+    }
+  }
+  return superseded;
+}
+
+export function supersedeTelegramReplyFence(key: string): boolean {
+  let superseded = supersedeTelegramReplyFenceState(key);
+  superseded = supersedeTelegramNonInterruptingReplyFenceChildren(key) || superseded;
+  return superseded;
+}
+
 export function supersedeTelegramReplyFenceLane(laneKey: string): boolean {
   const keys = [...(telegramReplyFenceKeysByLane.get(laneKey) ?? [])];
   let superseded = false;