fix(worker): make cancellation teardown failure-safe

apps/agent-worker/tests/unit/codex-process.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, test, vi } from 'vitest';
+
+import {
+  abortManagedCodexProcess,
+  managedCodexCommand,
+} from '../../src/codex-process';
+
+describe('managed Codex process', () => {
+  test('launches Codex in a job-specific process session', () => {
+    const command = managedCodexCommand({
+      jobId: 'job-1',
+      pidFile: '/home/alice/.codex/job-1.pid',
+      command: ['codex', 'exec', '--json', 'fix it'],
+    });
+
+    expect(command.slice(0, 2)).toEqual(['python3', '-c']);
+    expect(command).toContain('/home/alice/.codex/job-1.pid');
+    expect(command).toContain('job-1');
+    expect(command.slice(-4)).toEqual(['codex', 'exec', '--json', 'fix it']);
+  });
+
+  test('invokes an isolated in-box kill for the matching job', async () => {
+    const execute = vi.fn().mockResolvedValue({ exitCode: 0, output: '' });
+
+    await abortManagedCodexProcess({
+      jobId: 'job-1',
+      pidFile: '/home/alice/.codex/job-1.pid',
+      execute,
+    });
+
+    expect(execute).toHaveBeenCalledOnce();
+    const [command] = execute.mock.calls[0] as [string[]];
+    expect(command.slice(0, 2)).toEqual(['python3', '-c']);
+    expect(command).toContain('/home/alice/.codex/job-1.pid');
+    expect(command).toContain('job-1');
+  });
+});