{"record":{"id":"f521b494c0080d1d","repo":"Yeachan-Heo/oh-my-codex","slug":"omx-warning-failed-to-write-hook-derived-watche","errorCode":null,"errorMessage":"[omx] warning: failed to write hook-derived watcher pid file","messagePattern":"\\[omx\\] warning: failed to write hook-derived watcher pid file","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"src/cli/index.ts","lineNumber":7880,"sourceCode":"  } catch (error: unknown) {\n    console.warn(\"[omx] warning: failed to launch hook-derived watcher\", {\n      cwd,\n      error: error instanceof Error ? error.message : String(error),\n    });\n    return;\n  }\n\n  if (!watcherPid) return;\n\n  await writeFile(\n    pidPath,\n    JSON.stringify(\n      { pid: watcherPid, started_at: new Date().toISOString() },\n      null,\n      2,\n    ),\n  ).catch((error: unknown) => {\n    console.warn(\n      \"[omx] warning: failed to write 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 stopNotifyFallbackWatcher(cwd: string): Promise<void> {\n  const { readFile, unlink } = await import(\"fs/promises\");\n  const pidPath = notifyFallbackPidPath(cwd);\n  if (!existsSync(pidPath)) return;\n\n  try {\n    const pid = parseWatcherPidFile(await readFile(pidPath, \"utf-8\"));\n    if (pid) {\n      tryKillPid(pid, \"SIGTERM\");","sourceCodeStart":7862,"sourceCodeEnd":7898,"githubUrl":"https://github.com/Yeachan-Heo/oh-my-codex/blob/3ad79a8a6fe6e95fdbb8c00e40716fffe4011ce2/src/cli/index.ts#L7862-L7898","documentation":"The hook-derived watcher started but its PID file could not be written (writeFile rejected, caught). Future runs cannot locate/stop this watcher cleanly.","triggerScenarios":"writeFile of {pid, started_at} JSON to state rejects: ENOSPC, EACCES, or the state dir was deleted between mkdir and write.","commonSituations":"Full disks in CI; concurrent cleanup; permission changes mid-run.","solutions":["Free disk space and re-run","Pre-create and verify writability: `touch .omx/state/.write-test`","Avoid running concurrent setup/teardown commands on the same project"],"exampleFix":"// before\ntouch .omx/state/t  # permission denied\n\n# after\nchown -R $USER .omx && touch .omx/state/t && rm .omx/state/t","handlingStrategy":"validation","validationCode":"import { accessSync, constants, existsSync, statSync } from 'node:fs';\nfunction pidFileWritable(path: string): boolean {\n  if (existsSync(path)) { try { accessSync(path, constants.W_OK); return statSync(path).isFile(); } catch { return false; } }\n  try { accessSync(require('node:path').dirname(path), constants.W_OK); return true; } catch { return false; }\n}","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Pre-flight writability checks before spawning watchers","Monitor disk space on long-lived machines"],"tags":["pid-file","write-file","watcher","hook"],"backgroundTag":"file-write-failed","analyzedSha":"3ad79a8a6fe6e95fdbb8c00e40716fffe4011ce2","analyzedAt":"2026-08-27T22:18:39.783Z","schemaVersion":2},"datasetVersion":"2026-08-28T00:17:15.603Z"}