diff --git a/src/cron/isolated-agent/delivery-dispatch.double-announce.test.ts b/src/cron/isolated-agent/delivery-dispatch.double-announce.test.ts
index 3b93dc67964..f0df85b6fe6 100644
--- a/src/cron/isolated-agent/delivery-dispatch.double-announce.test.ts
+++ b/src/cron/isolated-agent/delivery-dispatch.double-announce.test.ts
@@ -426,8 +426,8 @@ describe("dispatchCronDelivery — double-announce guard", () => {
 
     // NO_REPLY must be filtered out before reaching the outbound adapter.
     expect(deliverOutboundPayloads).not.toHaveBeenCalled();
-    // No delivery was sent, so delivered stays false.
-    expect(state.delivered).toBe(false);
+    // Mark as silently delivered so the job is persisted as successful.
+    expect(state.delivered).toBe(true);
     // deliveryAttempted must be true so the heartbeat timer does not fire
     // a fallback enqueueSystemEvent with the NO_REPLY sentinel text.
     expect(state.deliveryAttempted).toBe(true);
@@ -454,7 +454,7 @@ describe("dispatchCronDelivery — double-announce guard", () => {
     const state = await dispatchCronDelivery(params);
 
     expect(deliverOutboundPayloads).not.toHaveBeenCalled();
-    expect(state.delivered).toBe(false);
+    expect(state.delivered).toBe(true);
     expect(state.deliveryAttempted).toBe(true);
 
     expect(
diff --git a/src/cron/isolated-agent/delivery-dispatch.ts b/src/cron/isolated-agent/delivery-dispatch.ts
index fad44594333..60fc76c0f5d 100644
--- a/src/cron/isolated-agent/delivery-dispatch.ts
+++ b/src/cron/isolated-agent/delivery-dispatch.ts
@@ -325,10 +325,17 @@ export async function dispatchCronDelivery(
         (p) => !isSilentReplyText(p.text, SILENT_REPLY_TOKEN),
       );
       if (payloadsForDelivery.length === 0) {
-        // Mark attempted so the heartbeat timer does not fire a fallback
-        // enqueueSystemEvent with the NO_REPLY sentinel text.
+        // Mark as silently delivered so the heartbeat timer does not fire a fallback
+        // and the job is persisted as successfully delivered.
         deliveryAttempted = true;
-        return null;
+        delivered = true;
+        return params.withRunSession({
+          status: "ok",
+          summary,
+          outputText,
+          delivered: true,
+          ...params.telemetry,
+        });
       }
       if (params.isAborted()) {
         return params.withRunSession({