test(cron): stabilize regression harness

src/cron/isolated-agent/run.test-harness.ts

@@ -1,4 +1,5 @@
 import { vi, type Mock } from "vitest";
+import { resolveFastModeState as resolveFastModeStateImpl } from "../../agents/fast-mode.js";
 import { LiveSessionModelSwitchError } from "../../agents/live-model-switch-error.js";
 
 type CronSessionEntry = {
@@ -237,7 +238,7 @@ export function resetRunCronIsolatedAgentTurnHarness(): void {
     formattedTime: "2026-02-10 12:00",
     timeLine: "Current time: 2026-02-10 12:00 UTC",
   });
-  resolveFastModeStateMock.mockReturnValue({ enabled: false });
+  resolveFastModeStateMock.mockImplementation((params) => resolveFastModeStateImpl(params));
   resolveNestedAgentLaneMock.mockReturnValue(undefined);
   resolveAgentTimeoutMsMock.mockReturnValue(60_000);
   deriveSessionTotalTokensMock.mockReturnValue(30);

src/cron/service/ops.regression.test.ts

@@ -1,6 +1,10 @@
 import fs from "node:fs/promises";
 import { describe, expect, it, vi } from "vitest";
-import { clearCommandLane, setCommandLaneConcurrency } from "../../process/command-queue.js";
+import {
+  clearCommandLane,
+  setCommandLaneConcurrency,
+  waitForActiveTasks,
+} from "../../process/command-queue.js";
 import { CommandLane } from "../../process/lanes.js";
 import {
   createAbortAwareIsolatedRunner,
@@ -351,6 +355,7 @@ describe("cron service ops regressions", () => {
 
     secondRun.resolve({ status: "ok", summary: "second queued run" });
     await bothFinished.promise;
+    await waitForActiveTasks(5_000);
     const jobs = state.store?.jobs ?? [];
     expect(jobs.find((job) => job.id === first.id)?.state.lastStatus).toBe("ok");
     expect(jobs.find((job) => job.id === second.id)?.state.lastStatus).toBe("ok");