fix(stability): patch regex retries and timeout abort handling

src/cron/service.issue-regressions.test.ts

@@ -683,6 +683,55 @@ describe("Cron issue regressions", () => {
     expect(job?.state.lastStatus).toBe("ok");
   });
 
+  it("aborts isolated runs when cron timeout fires", async () => {
+    vi.useRealTimers();
+    const store = await makeStorePath();
+    const scheduledAt = Date.parse("2026-02-15T13:00:00.000Z");
+    const cronJob = createIsolatedRegressionJob({
+      id: "abort-on-timeout",
+      name: "abort timeout",
+      scheduledAt,
+      schedule: { kind: "at", at: new Date(scheduledAt).toISOString() },
+      payload: { kind: "agentTurn", message: "work", timeoutSeconds: 0.01 },
+      state: { nextRunAtMs: scheduledAt },
+    });
+    await writeCronJobs(store.storePath, [cronJob]);
+
+    let now = scheduledAt;
+    let observedAbortSignal: AbortSignal | undefined;
+    const state = createCronServiceState({
+      cronEnabled: true,
+      storePath: store.storePath,
+      log: noopLogger,
+      nowMs: () => now,
+      enqueueSystemEvent: vi.fn(),
+      requestHeartbeatNow: vi.fn(),
+      runIsolatedAgentJob: vi.fn(async ({ abortSignal }) => {
+        observedAbortSignal = abortSignal;
+        await new Promise<void>((resolve) => {
+          if (!abortSignal) {
+            return;
+          }
+          if (abortSignal.aborted) {
+            resolve();
+            return;
+          }
+          abortSignal.addEventListener("abort", () => resolve(), { once: true });
+        });
+        now += 5;
+        return { status: "ok" as const, summary: "late" };
+      }),
+    });
+
+    await onTimer(state);
+
+    expect(observedAbortSignal).toBeDefined();
+    expect(observedAbortSignal?.aborted).toBe(true);
+    const job = state.store?.jobs.find((entry) => entry.id === "abort-on-timeout");
+    expect(job?.state.lastStatus).toBe("error");
+    expect(job?.state.lastError).toContain("timed out");
+  });
+
   it("retries cron schedule computation from the next second when the first attempt returns undefined (#17821)", () => {
     const scheduledAt = Date.parse("2026-02-15T13:00:00.000Z");
     const cronJob = createIsolatedRegressionJob({