diff --git a/src/cron/service.store-load-invalid-main-job.test.ts b/src/cron/service.store-load-invalid-main-job.test.ts
new file mode 100644
index 00000000000..39bc3588e44
--- /dev/null
+++ b/src/cron/service.store-load-invalid-main-job.test.ts
@@ -0,0 +1,78 @@
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { CronService } from "./service.js";
+import {
+  createNoopLogger,
+  installCronTestHooks,
+  writeCronStoreSnapshot,
+} from "./service.test-harness.js";
+import type { CronJob } from "./types.js";
+
+const noopLogger = createNoopLogger();
+installCronTestHooks({ logger: noopLogger });
+
+async function makeStorePath() {
+  const dir = await fs.mkdtemp(path.join(os.tmpdir(), "openclaw-cron-store-load-"));
+  return {
+    dir,
+    storePath: path.join(dir, "cron", "jobs.json"),
+  };
+}
+
+describe("CronService store load", () => {
+  let tempDir: string | null = null;
+
+  afterEach(async () => {
+    if (!tempDir) {
+      return;
+    }
+    await fs.rm(tempDir, { recursive: true, force: true });
+    tempDir = null;
+  });
+
+  it("skips invalid main jobs with agentTurn payloads loaded from disk", async () => {
+    const { dir, storePath } = await makeStorePath();
+    tempDir = dir;
+    const enqueueSystemEvent = vi.fn();
+    const requestHeartbeatNow = vi.fn();
+
+    const job = {
+      id: "job-1",
+      enabled: true,
+      createdAtMs: Date.parse("2025-12-13T00:00:00.000Z"),
+      updatedAtMs: Date.parse("2025-12-13T00:00:00.000Z"),
+      schedule: { kind: "at", at: "2025-12-13T00:00:01.000Z" },
+      sessionTarget: "main",
+      wakeMode: "now",
+      payload: { kind: "agentTurn", message: "bad" },
+      state: {},
+      name: "bad",
+    } satisfies CronJob;
+
+    await writeCronStoreSnapshot({ storePath, jobs: [job] });
+
+    const cron = new CronService({
+      storePath,
+      cronEnabled: true,
+      log: noopLogger,
+      enqueueSystemEvent,
+      requestHeartbeatNow,
+      runIsolatedAgentJob: vi.fn(async () => ({ status: "ok" as const })),
+    });
+
+    await cron.start();
+    vi.setSystemTime(new Date("2025-12-13T00:00:01.000Z"));
+    await cron.run("job-1", "due");
+
+    expect(enqueueSystemEvent).not.toHaveBeenCalled();
+    expect(requestHeartbeatNow).not.toHaveBeenCalled();
+
+    const jobs = await cron.list({ includeDisabled: true });
+    expect(jobs[0]?.state.lastStatus).toBe("skipped");
+    expect(jobs[0]?.state.lastError).toMatch(/main job requires/i);
+
+    cron.stop();
+  });
+});