diff --git a/src/cron/isolated-agent.delivers-response-has-heartbeat-ok-but-includes.test.ts b/src/cron/isolated-agent.delivers-response-has-heartbeat-ok-but-includes.test.ts
index 1374d98b76e..f42e314831f 100644
--- a/src/cron/isolated-agent.delivers-response-has-heartbeat-ok-but-includes.test.ts
+++ b/src/cron/isolated-agent.delivers-response-has-heartbeat-ok-but-includes.test.ts
@@ -25,6 +25,7 @@ describe("runCronIsolatedAgentTurn", () => {
         lastTo: "123",
       });
       const deps: CliDeps = {
+        sendMessageSlack: vi.fn(),
         sendMessageWhatsApp: vi.fn(),
         sendMessageTelegram: vi.fn().mockResolvedValue({
           messageId: "t1",
diff --git a/src/cron/isolated-agent.skips-delivery-without-whatsapp-recipient-besteffortdeliver-true.e2e.test.ts b/src/cron/isolated-agent.skips-delivery-without-whatsapp-recipient-besteffortdeliver-true.e2e.test.ts
index b9100011845..17bcfc11ec2 100644
--- a/src/cron/isolated-agent.skips-delivery-without-whatsapp-recipient-besteffortdeliver-true.e2e.test.ts
+++ b/src/cron/isolated-agent.skips-delivery-without-whatsapp-recipient-besteffortdeliver-true.e2e.test.ts
@@ -15,6 +15,7 @@ import { setupIsolatedAgentTurnMocks } from "./isolated-agent.test-setup.js";
 
 function createCliDeps(overrides: Partial<CliDeps> = {}): CliDeps {
   return {
+    sendMessageSlack: vi.fn(),
     sendMessageWhatsApp: vi.fn(),
     sendMessageTelegram: vi.fn(),
     sendMessageDiscord: vi.fn(),
diff --git a/src/cron/isolated-agent.uses-last-non-empty-agent-text-as.e2e.test.ts b/src/cron/isolated-agent.uses-last-non-empty-agent-text-as.e2e.test.ts
index cdbd3c7ee28..fa1f446add1 100644
--- a/src/cron/isolated-agent.uses-last-non-empty-agent-text-as.e2e.test.ts
+++ b/src/cron/isolated-agent.uses-last-non-empty-agent-text-as.e2e.test.ts
@@ -21,6 +21,7 @@ const withTempHome = withTempCronHome;
 
 function makeDeps(): CliDeps {
   return {
+    sendMessageSlack: vi.fn(),
     sendMessageWhatsApp: vi.fn(),
     sendMessageTelegram: vi.fn(),
     sendMessageDiscord: vi.fn(),
diff --git a/src/cron/service.delivery-plan.test.ts b/src/cron/service.delivery-plan.test.ts
index 930d444f73a..0337c063461 100644
--- a/src/cron/service.delivery-plan.test.ts
+++ b/src/cron/service.delivery-plan.test.ts
@@ -2,7 +2,8 @@ import fs from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
 import { describe, expect, it, vi } from "vitest";
-import { CronService } from "./service.js";
+import type { ChannelId } from "../channels/plugins/types.js";
+import { CronService, type CronServiceDeps } from "./service.js";
 
 const noopLogger = {
   debug: vi.fn(),
@@ -25,13 +26,13 @@ type DeliveryMode = "none" | "announce";
 
 type DeliveryOverride = {
   mode: DeliveryMode;
-  channel?: string;
+  channel?: ChannelId | "last";
   to?: string;
 };
 
 async function withCronService(
   params: {
-    runIsolatedAgentJob?: () => Promise<{ status: "ok"; summary: string; delivered?: boolean }>;
+    runIsolatedAgentJob?: CronServiceDeps["runIsolatedAgentJob"];
   },
   run: (context: {
     cron: CronService;
@@ -50,7 +51,7 @@ async function withCronService(
     requestHeartbeatNow,
     runIsolatedAgentJob:
       params.runIsolatedAgentJob ??
-      (vi.fn(async () => ({ status: "ok", summary: "done" })) as never),
+      (vi.fn(async () => ({ status: "ok" as const, summary: "done" })) as never),
   });
 
   await cron.start();
@@ -73,6 +74,7 @@ async function addIsolatedAgentTurnJob(
 ) {
   return cron.add({
     name: params.name,
+    enabled: true,
     schedule: { kind: "every", everyMs: 60_000, anchorMs: Date.now() },
     sessionTarget: "isolated",
     wakeMode: params.wakeMode,
@@ -80,7 +82,7 @@ async function addIsolatedAgentTurnJob(
       kind: "agentTurn",
       message: "hello",
       ...params.payload,
-    },
+    } as unknown as { kind: "agentTurn"; message: string },
     ...(params.delivery
       ? {
           delivery: params.delivery as unknown as {
@@ -129,7 +131,7 @@ describe("CronService delivery plan consistency", () => {
     await withCronService(
       {
         runIsolatedAgentJob: vi.fn(async () => ({
-          status: "ok",
+          status: "ok" as const,
           summary: "done",
           delivered: true,
         })),
diff --git a/src/cron/service.every-jobs-fire.test.ts b/src/cron/service.every-jobs-fire.test.ts
index 5b59ad88cb6..b97edc09955 100644
--- a/src/cron/service.every-jobs-fire.test.ts
+++ b/src/cron/service.every-jobs-fire.test.ts
@@ -147,7 +147,7 @@ describe("CronService interval/cron jobs fire on time", () => {
       log: noopLogger,
       enqueueSystemEvent,
       requestHeartbeatNow,
-      runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" })),
+      runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" as const })),
     });
 
     await cron.start();
diff --git a/src/cron/service.get-job.test.ts b/src/cron/service.get-job.test.ts
index a3e56004d46..c03a1380ab2 100644
--- a/src/cron/service.get-job.test.ts
+++ b/src/cron/service.get-job.test.ts
@@ -17,7 +17,7 @@ function createCronService(storePath: string) {
     log: logger,
     enqueueSystemEvent: vi.fn(),
     requestHeartbeatNow: vi.fn(),
-    runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" })),
+    runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" as const })),
   });
 }
 
diff --git a/src/cron/service.issue-16156-list-skips-cron.test.ts b/src/cron/service.issue-16156-list-skips-cron.test.ts
index 87e75448342..ff4bd7d7d7f 100644
--- a/src/cron/service.issue-16156-list-skips-cron.test.ts
+++ b/src/cron/service.issue-16156-list-skips-cron.test.ts
@@ -34,7 +34,7 @@ function createCronFromStorePath(storePath: string) {
     log: noopLogger,
     enqueueSystemEvent: vi.fn(),
     requestHeartbeatNow: vi.fn(),
-    runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" })),
+    runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" as const })),
   });
 }
 
diff --git a/src/cron/service.prevents-duplicate-timers.test.ts b/src/cron/service.prevents-duplicate-timers.test.ts
index a89aa0d8d6e..c5b2f348403 100644
--- a/src/cron/service.prevents-duplicate-timers.test.ts
+++ b/src/cron/service.prevents-duplicate-timers.test.ts
@@ -18,7 +18,7 @@ describe("CronService", () => {
     const store = await makeStorePath();
     const enqueueSystemEvent = vi.fn();
     const requestHeartbeatNow = vi.fn();
-    const runIsolatedAgentJob = vi.fn(async () => ({ status: "ok" }));
+    const runIsolatedAgentJob = vi.fn(async () => ({ status: "ok" as const }));
 
     const cronA = new CronService({
       storePath: store.storePath,
diff --git a/src/cron/service.restart-catchup.test.ts b/src/cron/service.restart-catchup.test.ts
index 78be88509f3..5a430ef8c8b 100644
--- a/src/cron/service.restart-catchup.test.ts
+++ b/src/cron/service.restart-catchup.test.ts
@@ -30,9 +30,9 @@ describe("CronService restart catch-up", () => {
       storePath: params.storePath,
       cronEnabled: true,
       log: noopLogger,
-      enqueueSystemEvent: params.enqueueSystemEvent,
-      requestHeartbeatNow: params.requestHeartbeatNow,
-      runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" })),
+      enqueueSystemEvent: params.enqueueSystemEvent as never,
+      requestHeartbeatNow: params.requestHeartbeatNow as never,
+      runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" as const })) as never,
     });
   }
 
diff --git a/src/cron/service.runs-one-shot-main-job-disables-it.test.ts b/src/cron/service.runs-one-shot-main-job-disables-it.test.ts
index 7d2a2a0b579..7729d2fa30e 100644
--- a/src/cron/service.runs-one-shot-main-job-disables-it.test.ts
+++ b/src/cron/service.runs-one-shot-main-job-disables-it.test.ts
@@ -394,7 +394,7 @@ async function loadLegacyDeliveryMigration(rawJob: Record<string, unknown>) {
     log: noopLogger,
     enqueueSystemEvent: vi.fn(),
     requestHeartbeatNow: vi.fn(),
-    runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" })),
+    runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" as const })),
   });
   await cron.start();
   const jobs = await cron.list({ includeDisabled: true });
@@ -506,7 +506,7 @@ describe("CronService", () => {
     expect(job.state.runningAtMs).toBeTypeOf("number");
 
     if (typeof resolveHeartbeat === "function") {
-      resolveHeartbeat({ status: "ran", durationMs: 123 });
+      (resolveHeartbeat as (res: HeartbeatRunResult) => void)({ status: "ran", durationMs: 123 });
     }
     await runPromise;
 
diff --git a/src/cron/service.skips-main-jobs-empty-systemevent-text.test.ts b/src/cron/service.skips-main-jobs-empty-systemevent-text.test.ts
index f438faa806d..7ebbd1c9632 100644
--- a/src/cron/service.skips-main-jobs-empty-systemevent-text.test.ts
+++ b/src/cron/service.skips-main-jobs-empty-systemevent-text.test.ts
@@ -39,7 +39,7 @@ async function withCronService(
     log: noopLogger,
     enqueueSystemEvent,
     requestHeartbeatNow,
-    runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" })),
+    runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" as const })),
   });
 
   await cron.start();
diff --git a/src/cron/service.store-migration.test.ts b/src/cron/service.store-migration.test.ts
index ddf9971f521..4edbd0f01b2 100644
--- a/src/cron/service.store-migration.test.ts
+++ b/src/cron/service.store-migration.test.ts
@@ -58,7 +58,7 @@ describe("CronService store migrations", () => {
       log: noopLogger,
       enqueueSystemEvent: vi.fn(),
       requestHeartbeatNow: vi.fn(),
-      runIsolatedAgentJob: vi.fn(async () => ({ status: "ok", summary: "ok" })),
+      runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" as const, summary: "ok" })),
     });
 
     await cron.start();
diff --git a/src/cron/service.store.migration.test.ts b/src/cron/service.store.migration.test.ts
index 14adfc9c9ea..7ba59757ef4 100644
--- a/src/cron/service.store.migration.test.ts
+++ b/src/cron/service.store.migration.test.ts
@@ -30,7 +30,7 @@ async function migrateAndLoadFirstJob(storePath: string): Promise<Record<string,
     log: noopLogger,
     enqueueSystemEvent: vi.fn(),
     requestHeartbeatNow: vi.fn(),
-    runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" })),
+    runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" as const })),
   });
 
   await cron.start();