diff --git a/src/agents/embedded-agent-runner/run-state.ts b/src/agents/embedded-agent-runner/run-state.ts
index 1c29d865927..c3345659e77 100644
--- a/src/agents/embedded-agent-runner/run-state.ts
+++ b/src/agents/embedded-agent-runner/run-state.ts
@@ -43,6 +43,14 @@ export type EmbeddedRunWaiter = {
   timer: NodeJS.Timeout;
 };
 
+export type AbandonedEmbeddedRun = {
+  sessionId: string;
+  sessionKey?: string;
+  sessionFile?: string;
+  abandonedAtMs: number;
+  reason: "timeout";
+};
+
 const EMBEDDED_RUN_STATE_KEY = Symbol.for("openclaw.embeddedRunState");
 
 const embeddedRunState = resolveGlobalSingleton(EMBEDDED_RUN_STATE_KEY, () => ({
@@ -50,6 +58,9 @@ const embeddedRunState = resolveGlobalSingleton(EMBEDDED_RUN_STATE_KEY, () => ({
   snapshots: new Map<string, ActiveEmbeddedRunSnapshot>(),
   sessionIdsByKey: new Map<string, string>(),
   sessionIdsByFile: new Map<string, string>(),
+  abandonedRunsBySessionId: new Map<string, AbandonedEmbeddedRun>(),
+  abandonedRunSessionIdsByKey: new Map<string, string>(),
+  abandonedRunSessionIdsByFile: new Map<string, string>(),
   waiters: new Map<string, Set<EmbeddedRunWaiter>>(),
   modelSwitchRequests: new Map<string, EmbeddedRunModelSwitchRequest>(),
 }));
@@ -66,6 +77,15 @@ export const ACTIVE_EMBEDDED_RUN_SESSION_IDS_BY_KEY =
 export const ACTIVE_EMBEDDED_RUN_SESSION_IDS_BY_FILE =
   embeddedRunState.sessionIdsByFile ??
   (embeddedRunState.sessionIdsByFile = new Map<string, string>());
+export const ABANDONED_EMBEDDED_RUNS_BY_SESSION_ID =
+  embeddedRunState.abandonedRunsBySessionId ??
+  (embeddedRunState.abandonedRunsBySessionId = new Map<string, AbandonedEmbeddedRun>());
+export const ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_KEY =
+  embeddedRunState.abandonedRunSessionIdsByKey ??
+  (embeddedRunState.abandonedRunSessionIdsByKey = new Map<string, string>());
+export const ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_FILE =
+  embeddedRunState.abandonedRunSessionIdsByFile ??
+  (embeddedRunState.abandonedRunSessionIdsByFile = new Map<string, string>());
 export const EMBEDDED_RUN_WAITERS =
   embeddedRunState.waiters ??
   (embeddedRunState.waiters = new Map<string, Set<EmbeddedRunWaiter>>());
diff --git a/src/agents/embedded-agent-runner/run/attempt.ts b/src/agents/embedded-agent-runner/run/attempt.ts
index 37fb36b7ad4..b172d2eb684 100644
--- a/src/agents/embedded-agent-runner/run/attempt.ts
+++ b/src/agents/embedded-agent-runner/run/attempt.ts
@@ -232,6 +232,7 @@ import { createEmbeddedAgentResourceLoader } from "../resource-loader.js";
 import {
   clearActiveEmbeddedRun,
   type EmbeddedAgentQueueHandle,
+  markActiveEmbeddedRunAbandoned,
   setActiveEmbeddedRun,
   updateActiveEmbeddedRunSessionFile,
   updateActiveEmbeddedRunSnapshot,
@@ -2892,6 +2893,7 @@ export async function runEmbeddedAttempt(
           }
         }
       };
+      let queueHandleForAbandonment: EmbeddedAgentQueueHandle | undefined;
       const abortRun = (isTimeout = false, reason?: unknown) => {
         aborted = true;
         if (isTimeout) {
@@ -2907,7 +2909,14 @@ export async function runEmbeddedAttempt(
         }
         abortCompaction();
         void abortActiveSession();
-        if (isTimeout) {
+        if (isTimeout && queueHandleForAbandonment) {
+          markActiveEmbeddedRunAbandoned({
+            sessionId: params.sessionId,
+            handle: queueHandleForAbandonment,
+            sessionKey: params.sessionKey,
+            sessionFile: params.sessionFile,
+            reason: "timeout",
+          });
           void sessionLockController.releaseHeldLockForAbort().catch((err) => {
             log.warn(
               `failed to release session lock on timeout abort: runId=${params.runId} ${String(err)}`,
@@ -3092,6 +3101,7 @@ export async function runEmbeddedAttempt(
       if (params.replyOperation) {
         params.replyOperation.attachBackend(queueHandle);
       }
+      queueHandleForAbandonment = queueHandle;
       setActiveEmbeddedRun(params.sessionId, queueHandle, params.sessionKey, params.sessionFile);
 
       let abortWarnTimer: NodeJS.Timeout | undefined;
diff --git a/src/agents/embedded-agent-runner/runs.test.ts b/src/agents/embedded-agent-runner/runs.test.ts
index 33a09393819..1a200d10230 100644
--- a/src/agents/embedded-agent-runner/runs.test.ts
+++ b/src/agents/embedded-agent-runner/runs.test.ts
@@ -18,10 +18,14 @@ import {
   abortAndDrainEmbeddedAgentRun,
   abortEmbeddedAgentRun,
   clearActiveEmbeddedRun,
+  clearEmbeddedRunAbandonment,
   consumeEmbeddedRunModelSwitch,
   getActiveEmbeddedRunSnapshot,
   isEmbeddedAgentRunHandleActive,
+  isEmbeddedRunAbandoned,
   formatEmbeddedAgentQueueFailureSummary,
+  markActiveEmbeddedRunAbandoned,
+  markEmbeddedRunAbandoned,
   queueEmbeddedAgentMessageWithOutcome,
   queueEmbeddedAgentMessageWithOutcomeAsync,
   requestEmbeddedRunModelSwitch,
@@ -412,6 +416,56 @@ describe("embedded-agent runner run registry", () => {
     expect(resolveActiveEmbeddedRunHandleSessionId("agent:main:main")).toBeUndefined();
   });
 
+  it("tracks timeout abandonment by session id, key, and file until a new run starts", () => {
+    const sessionFile = "/tmp/openclaw-abandoned-session.jsonl";
+    const handle = createRunHandle();
+
+    markEmbeddedRunAbandoned({
+      sessionId: "session-timeout",
+      sessionKey: "agent:main:main",
+      sessionFile,
+      reason: "timeout",
+    });
+
+    expect(isEmbeddedRunAbandoned({ sessionId: "session-timeout" })).toBe(true);
+    expect(isEmbeddedRunAbandoned({ sessionKey: "agent:main:main" })).toBe(true);
+    expect(isEmbeddedRunAbandoned({ sessionFile })).toBe(true);
+
+    setActiveEmbeddedRun("session-next", handle, "agent:main:main", sessionFile);
+
+    expect(isEmbeddedRunAbandoned({ sessionId: "session-timeout" })).toBe(false);
+    expect(isEmbeddedRunAbandoned({ sessionKey: "agent:main:main" })).toBe(false);
+    expect(isEmbeddedRunAbandoned({ sessionFile })).toBe(false);
+
+    markEmbeddedRunAbandoned({
+      sessionId: "session-next",
+      sessionKey: "agent:main:main",
+      reason: "timeout",
+    });
+    clearEmbeddedRunAbandonment({ sessionId: "session-next" });
+
+    expect(isEmbeddedRunAbandoned({ sessionKey: "agent:main:main" })).toBe(false);
+  });
+
+  it("ignores timeout abandonment from a stale replaced handle", () => {
+    const oldHandle = createRunHandle();
+    const newHandle = createRunHandle();
+
+    setActiveEmbeddedRun("session-replaced", oldHandle, "agent:main:main");
+    setActiveEmbeddedRun("session-replaced", newHandle, "agent:main:main");
+
+    expect(
+      markActiveEmbeddedRunAbandoned({
+        sessionId: "session-replaced",
+        handle: oldHandle,
+        sessionKey: "agent:main:main",
+        reason: "timeout",
+      }),
+    ).toBe(false);
+
+    expect(isEmbeddedRunAbandoned({ sessionKey: "agent:main:main" })).toBe(false);
+  });
+
   it("treats repeated clears for a completed run handle as idempotent", () => {
     const debugSpy = vi.spyOn(diagnosticLogger, "debug").mockImplementation(() => undefined);
     const handle = createRunHandle();
diff --git a/src/agents/embedded-agent-runner/runs.ts b/src/agents/embedded-agent-runner/runs.ts
index 54e354f47c3..cfe9f884d47 100644
--- a/src/agents/embedded-agent-runner/runs.ts
+++ b/src/agents/embedded-agent-runner/runs.ts
@@ -24,10 +24,14 @@ import {
   ACTIVE_EMBEDDED_RUN_SESSION_IDS_BY_FILE,
   ACTIVE_EMBEDDED_RUN_SESSION_IDS_BY_KEY,
   ACTIVE_EMBEDDED_RUN_SNAPSHOTS,
+  ABANDONED_EMBEDDED_RUNS_BY_SESSION_ID,
+  ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_FILE,
+  ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_KEY,
   EMBEDDED_RUN_MODEL_SWITCH_REQUESTS,
   EMBEDDED_RUN_WAITERS,
   getActiveEmbeddedRunCount,
   type ActiveEmbeddedRunSnapshot,
+  type AbandonedEmbeddedRun,
   type EmbeddedAgentQueueHandle,
   type EmbeddedAgentQueueMessageOptions,
   type EmbeddedRunModelSwitchRequest,
@@ -136,6 +140,135 @@ function setActiveRunSessionFile(sessionFile: string | undefined, sessionId: str
   );
 }
 
+function clearEmbeddedRunAbandonmentBySessionId(sessionId: string): void {
+  const abandonedRun = ABANDONED_EMBEDDED_RUNS_BY_SESSION_ID.get(sessionId);
+  if (!abandonedRun) {
+    return;
+  }
+  ABANDONED_EMBEDDED_RUNS_BY_SESSION_ID.delete(sessionId);
+  const normalizedSessionKey = abandonedRun.sessionKey?.trim();
+  if (
+    normalizedSessionKey &&
+    ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_KEY.get(normalizedSessionKey) === sessionId
+  ) {
+    ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_KEY.delete(normalizedSessionKey);
+  }
+  const normalizedSessionFile = abandonedRun.sessionFile?.trim();
+  if (normalizedSessionFile) {
+    const sessionFileKey = resolveEmbeddedSessionFileKey(normalizedSessionFile);
+    if (ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_FILE.get(sessionFileKey) === sessionId) {
+      ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_FILE.delete(sessionFileKey);
+    }
+  }
+}
+
+function clearEmbeddedRunAbandonmentBySessionKey(sessionKey: string | undefined): void {
+  const normalizedSessionKey = sessionKey?.trim();
+  if (!normalizedSessionKey) {
+    return;
+  }
+  const sessionId = ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_KEY.get(normalizedSessionKey);
+  if (sessionId) {
+    clearEmbeddedRunAbandonmentBySessionId(sessionId);
+  }
+}
+
+function clearEmbeddedRunAbandonmentBySessionFile(sessionFile: string | undefined): void {
+  const normalizedSessionFile = sessionFile?.trim();
+  if (!normalizedSessionFile) {
+    return;
+  }
+  const sessionFileKey = resolveEmbeddedSessionFileKey(normalizedSessionFile);
+  const sessionId = ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_FILE.get(sessionFileKey);
+  if (sessionId) {
+    clearEmbeddedRunAbandonmentBySessionId(sessionId);
+  }
+}
+
+export function clearEmbeddedRunAbandonment(params: {
+  sessionId?: string;
+  sessionKey?: string;
+  sessionFile?: string;
+}): void {
+  const normalizedSessionId = params.sessionId?.trim();
+  if (normalizedSessionId) {
+    clearEmbeddedRunAbandonmentBySessionId(normalizedSessionId);
+  }
+  clearEmbeddedRunAbandonmentBySessionKey(params.sessionKey);
+  clearEmbeddedRunAbandonmentBySessionFile(params.sessionFile);
+}
+
+export function markEmbeddedRunAbandoned(params: {
+  sessionId: string;
+  sessionKey?: string;
+  sessionFile?: string;
+  reason: AbandonedEmbeddedRun["reason"];
+}): void {
+  const sessionId = params.sessionId.trim();
+  if (!sessionId) {
+    return;
+  }
+  clearEmbeddedRunAbandonment({
+    sessionId,
+    sessionKey: params.sessionKey,
+    sessionFile: params.sessionFile,
+  });
+  const abandonedRun: AbandonedEmbeddedRun = {
+    sessionId,
+    abandonedAtMs: Date.now(),
+    reason: params.reason,
+    ...(params.sessionKey?.trim() ? { sessionKey: params.sessionKey.trim() } : {}),
+    ...(params.sessionFile?.trim() ? { sessionFile: params.sessionFile.trim() } : {}),
+  };
+  ABANDONED_EMBEDDED_RUNS_BY_SESSION_ID.set(sessionId, abandonedRun);
+  if (abandonedRun.sessionKey) {
+    ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_KEY.set(abandonedRun.sessionKey, sessionId);
+  }
+  if (abandonedRun.sessionFile) {
+    ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_FILE.set(
+      resolveEmbeddedSessionFileKey(abandonedRun.sessionFile),
+      sessionId,
+    );
+  }
+}
+
+export function markActiveEmbeddedRunAbandoned(params: {
+  sessionId: string;
+  handle: EmbeddedAgentQueueHandle;
+  sessionKey?: string;
+  sessionFile?: string;
+  reason: AbandonedEmbeddedRun["reason"];
+}): boolean {
+  const sessionId = params.sessionId.trim();
+  if (!sessionId || ACTIVE_EMBEDDED_RUNS.get(sessionId) !== params.handle) {
+    return false;
+  }
+  markEmbeddedRunAbandoned(params);
+  return true;
+}
+
+export function isEmbeddedRunAbandoned(params: {
+  sessionId?: string;
+  sessionKey?: string;
+  sessionFile?: string;
+}): boolean {
+  const normalizedSessionId = params.sessionId?.trim();
+  if (normalizedSessionId && ABANDONED_EMBEDDED_RUNS_BY_SESSION_ID.has(normalizedSessionId)) {
+    return true;
+  }
+  const normalizedSessionKey = params.sessionKey?.trim();
+  if (normalizedSessionKey && ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_KEY.has(normalizedSessionKey)) {
+    return true;
+  }
+  const normalizedSessionFile = params.sessionFile?.trim();
+  return Boolean(
+    normalizedSessionFile &&
+    ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_FILE.has(
+      resolveEmbeddedSessionFileKey(normalizedSessionFile),
+    ),
+  );
+}
+
 function clearActiveRunSessionFiles(sessionId: string, sessionFile?: string): void {
   const normalizedSessionFile = sessionFile?.trim();
   if (normalizedSessionFile) {
@@ -586,6 +719,7 @@ export function setActiveEmbeddedRun(
   sessionFile?: string,
 ) {
   const wasActive = ACTIVE_EMBEDDED_RUNS.has(sessionId);
+  clearEmbeddedRunAbandonment({ sessionId, sessionKey, sessionFile });
   ACTIVE_EMBEDDED_RUNS.set(sessionId, handle);
   setActiveRunSessionKey(sessionKey, sessionId);
   clearActiveRunSessionFiles(sessionId);
@@ -692,6 +826,9 @@ export const testing = {
     ACTIVE_EMBEDDED_RUN_SNAPSHOTS.clear();
     ACTIVE_EMBEDDED_RUN_SESSION_IDS_BY_KEY.clear();
     ACTIVE_EMBEDDED_RUN_SESSION_IDS_BY_FILE.clear();
+    ABANDONED_EMBEDDED_RUNS_BY_SESSION_ID.clear();
+    ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_KEY.clear();
+    ABANDONED_EMBEDDED_RUN_SESSION_IDS_BY_FILE.clear();
     EMBEDDED_RUN_MODEL_SWITCH_REQUESTS.clear();
   },
 };
diff --git a/src/agents/subagent-announce-delivery.runtime.ts b/src/agents/subagent-announce-delivery.runtime.ts
index fe7df3c2044..e4ecc4167e7 100644
--- a/src/agents/subagent-announce-delivery.runtime.ts
+++ b/src/agents/subagent-announce-delivery.runtime.ts
@@ -15,6 +15,7 @@ export { getGlobalHookRunner } from "../plugins/hook-runner-global.js";
 export {
   formatEmbeddedAgentQueueFailureSummary,
   isEmbeddedAgentRunActive,
+  isEmbeddedRunAbandoned,
   queueEmbeddedAgentMessageWithOutcomeAsync,
   resolveActiveEmbeddedRunSessionId,
 } from "./embedded-agent-runner/runs.js";
diff --git a/src/agents/subagent-announce-delivery.test.ts b/src/agents/subagent-announce-delivery.test.ts
index 81142b2059d..087e0c16a6e 100644
--- a/src/agents/subagent-announce-delivery.test.ts
+++ b/src/agents/subagent-announce-delivery.test.ts
@@ -195,6 +195,7 @@ async function deliverSlackThreadAnnouncement(params: {
   sendMessage?: typeof runtimeSendMessage;
   internalEvents?: AgentInternalEvent[];
   sourceTool?: string;
+  requesterAbandoned?: boolean;
 }) {
   testing.setDepsForTest({
     callGateway: params.callGateway,
@@ -202,6 +203,7 @@ async function deliverSlackThreadAnnouncement(params: {
       sessionId: params.sessionId,
       isActive: params.isActive,
     }),
+    isRequesterSessionAbandoned: () => params.requesterAbandoned === true,
     getRuntimeConfig: () => ({}) as never,
     sendMessage: params.sendMessage ?? runtimeSendMessage,
     ...(params.queueEmbeddedAgentMessageWithOutcome
@@ -276,6 +278,7 @@ async function deliverTelegramDirectMessageCompletion(params: {
   requesterSessionKey?: string;
   sourceTool?: string;
   runtimeConfig?: Record<string, unknown>;
+  requesterAbandoned?: boolean;
   origin?: {
     channel: "telegram";
     to: string;
@@ -298,6 +301,7 @@ async function deliverTelegramDirectMessageCompletion(params: {
           : (params.requesterSessionId ?? "requester-session-telegram"),
       isActive: params.isActive === true,
     }),
+    isRequesterSessionAbandoned: () => params.requesterAbandoned === true,
     getRuntimeConfig: () => (params.runtimeConfig ?? {}) as never,
     sendMessage: params.sendMessage ?? runtimeSendMessage,
     ...(params.queueEmbeddedAgentMessageWithOutcome
@@ -1987,6 +1991,59 @@ describe("deliverSubagentAnnouncement completion delivery", () => {
     expect(sendMessage).not.toHaveBeenCalled();
   });
 
+  it("does not restart an abandoned requester session for late completion delivery", async () => {
+    const callGateway = createGatewayMock({
+      result: {
+        payloads: [{ text: "child completion output" }],
+      },
+    });
+    const sendMessage = createSendMessageMock();
+    const queueEmbeddedAgentMessageWithOutcome = createQueueOutcomeMock(true);
+    const result = await deliverTelegramDirectMessageCompletion({
+      callGateway,
+      sendMessage,
+      requesterAbandoned: true,
+      isActive: false,
+      queueEmbeddedAgentMessageWithOutcome,
+      internalEvents: [
+        {
+          type: "task_completion",
+          source: "subagent",
+          childSessionKey: "agent:worker:subagent:child",
+          childSessionId: "child-session-id",
+          announceType: "subagent task",
+          taskLabel: "telegram late completion",
+          status: "ok",
+          statusLabel: "completed successfully",
+          result: "child completion output",
+          replyInstruction: "Summarize the result.",
+        },
+      ],
+    });
+
+    expectRecordFields(result, {
+      delivered: false,
+      path: "none",
+      error: "requester session abandoned after timeout",
+    });
+    expect(result.phases).toEqual([
+      expect.objectContaining({
+        phase: "direct-primary",
+        delivered: false,
+        path: "none",
+        error: "requester session abandoned after timeout",
+      }),
+      expect.objectContaining({
+        phase: "steer-fallback",
+        delivered: false,
+        path: "none",
+      }),
+    ]);
+    expect(callGateway).not.toHaveBeenCalled();
+    expect(sendMessage).not.toHaveBeenCalled();
+    expect(queueEmbeddedAgentMessageWithOutcome).not.toHaveBeenCalled();
+  });
+
   it("uses steer fallback when a completion handoff has no visible output", async () => {
     const callGateway = createGatewayMock({
       result: {
diff --git a/src/agents/subagent-announce-delivery.ts b/src/agents/subagent-announce-delivery.ts
index 02e0e3f74e2..a72e4d54c78 100644
--- a/src/agents/subagent-announce-delivery.ts
+++ b/src/agents/subagent-announce-delivery.ts
@@ -43,6 +43,7 @@ import {
   dispatchGatewayMethodInProcess,
   getGlobalHookRunner,
   isEmbeddedAgentRunActive,
+  isEmbeddedRunAbandoned,
   getRuntimeConfig,
   formatEmbeddedAgentQueueFailureSummary,
   loadSessionStore,
@@ -73,6 +74,7 @@ type SubagentAnnounceDeliveryDeps = {
     sessionId?: string;
     isActive: boolean;
   };
+  isRequesterSessionAbandoned: (requesterSessionKey: string, sessionId?: string) => boolean;
   queueEmbeddedAgentMessageWithOutcome: (
     sessionId: string,
     text: string,
@@ -93,6 +95,8 @@ const defaultSubagentAnnounceDeliveryDeps: SubagentAnnounceDeliveryDeps = {
       isActive: Boolean(sessionId && isEmbeddedAgentRunActive(sessionId)),
     };
   },
+  isRequesterSessionAbandoned: (requesterSessionKey, sessionId) =>
+    isEmbeddedRunAbandoned({ sessionKey: requesterSessionKey, sessionId }),
   queueEmbeddedAgentMessageWithOutcome: queueEmbeddedAgentMessageWithOutcomeAsync,
   sendMessage,
 };
@@ -569,6 +573,9 @@ async function maybeSteerSubagentAnnounce(params: {
   const { cfg, entry } = loadRequesterSessionEntry(params.requesterSessionKey);
   const canonicalKey = resolveRequesterStoreKey(cfg, params.requesterSessionKey);
   const { sessionId, isActive } = resolveRequesterSessionActivity(canonicalKey);
+  if (subagentAnnounceDeliveryDeps.isRequesterSessionAbandoned(canonicalKey, sessionId)) {
+    return { status: "none" };
+  }
   if (!sessionId || !isActive) {
     return { status: "none" };
   }
@@ -1055,6 +1062,19 @@ async function sendSubagentAnnounceDirectly(params: {
       completionRouteRequiresMessageToolDelivery ||
       (agentMediatedCompletion && expectedMediaUrls.length > 0);
     const requesterActivity = resolveRequesterSessionActivity(canonicalRequesterSessionKey);
+    if (
+      params.expectsCompletionMessage &&
+      subagentAnnounceDeliveryDeps.isRequesterSessionAbandoned(
+        canonicalRequesterSessionKey,
+        requesterActivity.sessionId,
+      )
+    ) {
+      return {
+        delivered: false,
+        path: "none",
+        error: "requester session abandoned after timeout",
+      };
+    }
     let activeRequesterWakeFailed = false;
     const tryGeneratedMediaDirectDelivery = async (announceResponse?: unknown) => {
       if (requesterActivity.isActive && !activeRequesterWakeFailed) {