{"record":{"id":"b6a49824a0826d4f","repo":"Yeachan-Heo/oh-my-codex","slug":"omx-warning-failed-to-stop-hook-derived-watcher","errorCode":null,"errorMessage":"[omx] warning: failed to stop hook-derived watcher process","messagePattern":"\\[omx\\] warning: failed to stop hook-derived watcher process","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"src/cli/index.ts","lineNumber":7936,"sourceCode":"      },\n    );\n  });\n}\n\nasync function stopHookDerivedWatcher(cwd: string): Promise<void> {\n  const { readFile, unlink } = await import(\"fs/promises\");\n  const pidPath = hookDerivedWatcherPidPath(cwd);\n  if (!existsSync(pidPath)) return;\n\n  try {\n    const parsed = JSON.parse(await readFile(pidPath, \"utf-8\")) as {\n      pid?: number;\n    };\n    if (parsed && typeof parsed.pid === \"number\") {\n      process.kill(parsed.pid, \"SIGTERM\");\n    }\n  } catch (error: unknown) {\n    console.warn(\"[omx] warning: failed to stop hook-derived watcher process\", {\n      path: pidPath,\n      error: error instanceof Error ? error.message : String(error),\n    });\n  }\n\n  await unlink(pidPath).catch((error: unknown) => {\n    console.warn(\n      \"[omx] warning: failed to remove hook-derived watcher pid file\",\n      {\n        path: pidPath,\n        error: error instanceof Error ? error.message : String(error),\n      },\n    );\n  });\n}\n\nasync function flushNotifyFallbackOnce(\n  cwd: string,","sourceCodeStart":7918,"sourceCodeEnd":7954,"githubUrl":"https://github.com/Yeachan-Heo/oh-my-codex/blob/3ad79a8a6fe6e95fdbb8c00e40716fffe4011ce2/src/cli/index.ts#L7918-L7954","documentation":"Stopping the hook-derived watcher failed: either the pid file could not be read/parsed or process.kill(parsed.pid,'SIGTERM') threw. The watcher likely keeps running in the background.","triggerScenarios":"readFile or process.kill throws (ENOENT on a concurrently-removed file, EPERM, EINVAL from a bad PID) in the stop-hook-derived-watcher path.","commonSituations":"Concurrent omx teardown racing on the same pid file; watcher started by a different user; PID file with non-numeric pid field.","solutions":["Kill the watcher manually: `pkill -f hook-derived-watcher`","Delete the stale pid file under .omx/state","Serialize teardown operations per project"],"exampleFix":"// before\n# warning: failed to stop hook-derived watcher process\n\n# after\npkill -f hook-derived-watcher; rm -f .omx/state/hook-derived-watcher.pid","handlingStrategy":"try-catch","validationCode":"function validWatcherRecord(raw: string): { pid: number } | null {\n  try { const p = JSON.parse(raw); return typeof p?.pid === 'number' && Number.isInteger(p.pid) ? p : null; } catch { return null; }\n}","typeGuard":null,"tryCatchPattern":"try { if (parsed?.pid) process.kill(parsed.pid,'SIGTERM'); } catch (e: any) { if (e?.code !== 'ESRCH') console.warn('[omx] warning: failed to stop hook-derived watcher process', { error: e }); }","preventionTips":["Serialize stop/start of watchers","Validate pid records before kill","Clean state after abnormal exits"],"tags":["watcher","signal","hook","teardown"],"backgroundTag":"stale-pid-file","analyzedSha":"3ad79a8a6fe6e95fdbb8c00e40716fffe4011ce2","analyzedAt":"2026-08-27T22:18:39.783Z","schemaVersion":2},"datasetVersion":"2026-08-28T00:17:15.603Z"}