diff --git a/src/cron/delivery.test.ts b/src/cron/delivery.test.ts
index 970589f228e..1d2ffd0ac8d 100644
--- a/src/cron/delivery.test.ts
+++ b/src/cron/delivery.test.ts
@@ -166,6 +166,33 @@ describe("resolveFailureDestination", () => {
     expect(plan).toBeNull();
   });
 
+  it("keeps failure destinations for topic-routed announce jobs", () => {
+    const plan = resolveFailureDestination(
+      makeJob({
+        delivery: {
+          mode: "announce",
+          channel: "telegram",
+          to: "-1003700845925",
+          threadId: "15",
+          accountId: "bot-a",
+          failureDestination: {
+            mode: "announce",
+            channel: "telegram",
+            to: "-1003700845925",
+            accountId: "bot-a",
+          },
+        },
+      }),
+      undefined,
+    );
+    expect(plan).toEqual({
+      mode: "announce",
+      channel: "telegram",
+      to: "-1003700845925",
+      accountId: "bot-a",
+    });
+  });
+
   it("returns null when webhook failure destination matches the primary webhook target", () => {
     const plan = resolveFailureDestination(
       makeJob({
diff --git a/src/cron/delivery.ts b/src/cron/delivery.ts
index b71589d10ce..6347bd87b82 100644
--- a/src/cron/delivery.ts
+++ b/src/cron/delivery.ts
@@ -237,6 +237,7 @@ function isSameDeliveryTarget(
   const primaryChannel = delivery.channel;
   const primaryTo = delivery.to;
   const primaryAccountId = delivery.accountId;
+  const primaryThreadId = normalizeThreadId(delivery.threadId);
 
   if (failurePlan.mode === "webhook") {
     return primaryMode === "webhook" && primaryTo === failurePlan.to;
@@ -246,6 +247,7 @@ function isSameDeliveryTarget(
   const failureChannelNormalized = failurePlan.channel ?? "last";
 
   return (
+    primaryThreadId === undefined &&
     failureChannelNormalized === primaryChannelNormalized &&
     failurePlan.to === primaryTo &&
     failurePlan.accountId === primaryAccountId
diff --git a/src/gateway/protocol/schema/cron.ts b/src/gateway/protocol/schema/cron.ts
index 3cba5a65781..a3e76ed0cb3 100644
--- a/src/gateway/protocol/schema/cron.ts
+++ b/src/gateway/protocol/schema/cron.ts
@@ -171,6 +171,7 @@ export const CronFailureDestinationSchema = Type.Object(
 
 const CronDeliverySharedProperties = {
   channel: Type.Optional(Type.Union([Type.Literal("last"), NonEmptyString])),
+  threadId: Type.Optional(Type.Union([Type.String(), Type.Number()])),
   accountId: Type.Optional(NonEmptyString),
   bestEffort: Type.Optional(Type.Boolean()),
   failureDestination: Type.Optional(CronFailureDestinationSchema),
diff --git a/src/gateway/server.cron.test.ts b/src/gateway/server.cron.test.ts
index 2590f63c23d..55908758acd 100644
--- a/src/gateway/server.cron.test.ts
+++ b/src/gateway/server.cron.test.ts
@@ -359,6 +359,69 @@ describe("gateway server cron", () => {
       expect(merged?.delivery?.channel).toBe("telegram");
       expect(merged?.delivery?.to).toBe("19098680");
 
+      const threadIdRes = await rpcReq(ws, "cron.add", {
+        name: "thread id roundtrip",
+        enabled: true,
+        schedule: { kind: "every", everyMs: 60_000 },
+        sessionTarget: "isolated",
+        wakeMode: "next-heartbeat",
+        payload: { kind: "agentTurn", message: "hello" },
+        delivery: {
+          mode: "announce",
+          channel: "telegram",
+          to: "-1003700845925",
+          threadId: 15,
+        },
+      });
+      expect(threadIdRes.ok).toBe(true);
+      const threadIdAdded = threadIdRes.payload as
+        | {
+            id?: unknown;
+            delivery?: { threadId?: unknown; mode?: unknown; channel?: unknown; to?: unknown };
+          }
+        | undefined;
+      const threadIdJobId = typeof threadIdAdded?.id === "string" ? threadIdAdded.id : "";
+      expect(threadIdJobId.length > 0).toBe(true);
+      expect(threadIdAdded?.delivery?.mode).toBe("announce");
+      expect(threadIdAdded?.delivery?.channel).toBe("telegram");
+      expect(threadIdAdded?.delivery?.to).toBe("-1003700845925");
+      expect(threadIdAdded?.delivery?.threadId).toBe(15);
+
+      const threadIdUpdateRes = await rpcReq(ws, "cron.update", {
+        id: threadIdJobId,
+        patch: {
+          delivery: { threadId: "16" },
+        },
+      });
+      expect(threadIdUpdateRes.ok).toBe(true);
+      const threadIdUpdated = threadIdUpdateRes.payload as
+        | {
+            delivery?: { mode?: unknown; channel?: unknown; to?: unknown; threadId?: unknown };
+          }
+        | undefined;
+      expect(threadIdUpdated?.delivery?.mode).toBe("announce");
+      expect(threadIdUpdated?.delivery?.channel).toBe("telegram");
+      expect(threadIdUpdated?.delivery?.to).toBe("-1003700845925");
+      expect(threadIdUpdated?.delivery?.threadId).toBe("16");
+
+      const threadIdListRes = await rpcReq(ws, "cron.list", {
+        includeDisabled: true,
+        query: "thread id roundtrip",
+      });
+      expect(threadIdListRes.ok).toBe(true);
+      const threadIdJobs = (threadIdListRes.payload as { jobs?: unknown } | null)?.jobs;
+      expect(Array.isArray(threadIdJobs)).toBe(true);
+      const threadIdListed = (
+        threadIdJobs as Array<{
+          id?: unknown;
+          delivery?: { threadId?: unknown; mode?: unknown; channel?: unknown; to?: unknown };
+        }>
+      ).find((job) => job.id === threadIdJobId);
+      expect(threadIdListed?.delivery?.mode).toBe("announce");
+      expect(threadIdListed?.delivery?.channel).toBe("telegram");
+      expect(threadIdListed?.delivery?.to).toBe("-1003700845925");
+      expect(threadIdListed?.delivery?.threadId).toBe("16");
+
       const modelOnlyPatchRes = await rpcReq(ws, "cron.update", {
         id: mergeJobId,
         patch: {