{"record":{"id":"cba7bf37f17269b6","repo":"thedotmack/claude-mem","slug":"could-not-restrict-permissions-on-path-to-0600","errorCode":null,"errorMessage":"Could not restrict permissions on ${path} to 0600: ${chmodError instanceof Error ? chmodError.message : String(chmodError)}","messagePattern":"Could not restrict permissions on (.+?) to 0600: (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"src/npx-cli/commands/install.ts","lineNumber":824,"sourceCode":"      }\n    }\n\n    const target = envNested\n      ? (document.env as Record<string, unknown>)\n      : document;\n    for (const [key, value] of Object.entries(updates)) {\n      target[key] = value;\n    }\n\n    writeSettingsJsonAtomic(path, document);\n    // settings.json can carry tokens (CMEM Pro setup token, provider API\n    // keys); a fresh file inherits the umask (usually 0644), leaving them\n    // world-readable. Tighten to owner-only. Fail-soft: a chmod failure must\n    // never fail the settings write itself, but it is not silent.\n    try {\n      chmodSync(path, 0o600);\n    } catch (chmodError: unknown) {\n      log.warn(`Could not restrict permissions on ${path} to 0600: ${chmodError instanceof Error ? chmodError.message : String(chmodError)}`);\n    }\n    return true;\n  } catch (error: unknown) {\n    log.error(`Failed to write settings to ${path}: ${error instanceof Error ? error.message : String(error)}`);\n    return false;\n  }\n}\n\ntype ProviderId = 'claude' | 'gemini' | 'openrouter';\n/**\n * What the installer prompt may offer. `cmem` is a prompt-only sentinel: picking\n * it configures the generic OpenAI-compatible path (base URL + model + key) and\n * persists CLAUDE_MEM_PROVIDER='openrouter'. The worker only understands\n * 'claude' | 'gemini' | 'openrouter', so 'cmem' must never reach settings.json.\n */\ntype ProviderChoice = ProviderId | 'cmem';\ntype ClaudeAccessMode = 'subscription' | 'api-key';\ntype ClaudeApiMode = 'direct' | 'gateway';","sourceCodeStart":806,"sourceCodeEnd":842,"githubUrl":"https://github.com/thedotmack/claude-mem/blob/e2d1df569a8f04075d40e92461128ece7cf04c82/src/npx-cli/commands/install.ts#L806-L842","documentation":"After atomically writing settings.json, the installer tries chmod 0o600 because the file can contain tokens (CMEM Pro setup token, provider API keys) and a umask-default 0644 file would be world-readable. This warning means chmodSync failed — the settings write itself succeeded, but the file may be readable by other users. Deliberately fail-soft, not silent.","triggerScenarios":"chmodSync throwing: filesystems that do not support POSIX modes (Windows FAT, some network mounts, exFAT), the file deleted/moved by another process between write and chmod, or running without ownership of the file.","commonSituations":"HOME on a Windows drive or SMB/NFS mount without Unix permissions; container with a volume that ignores mode bits; another agent rotating the settings file concurrently.","solutions":["Fix manually: `chmod 600 ~/.claude-mem/settings.json` (on POSIX) and verify with `stat -c %a`.","On Windows/network filesystems, rely on ACLs instead: restrict the folder so only your user can read it.","If secrets were written while the file was group/world-readable, rotate them (API keys, `npx claude-mem server keys rotate`) — the warning means exposure was possible.","Move ~/.claude-mem onto a POSIX filesystem if the host mount permanently ignores modes."],"exampleFix":"# after seeing this warning, tighten manually and verify:\nchmod 600 ~/.claude-mem/settings.json\nstat -c '%a %n' ~/.claude-mem/settings.json  # expect: 600","handlingStrategy":"try-catch","validationCode":"// Verify post-conditions after install instead of trusting the chmod:\nimport { statSync } from 'node:fs';\nconst mode = statSync(`${process.env.HOME}/.claude-mem/settings.json`).mode & 0o777;\nif (mode !== 0o600) {\n  // on POSIX tighten manually; on Windows/ACL fs rely on folder ACLs\n}","typeGuard":null,"tryCatchPattern":"// The correct pattern is exactly what the installer does — fail-soft but loud:\ntry { chmodSync(path, 0o600); }\ncatch (e) { log.warn(`permissions not restricted: ${e instanceof Error ? e.message : e}`); }","preventionTips":["Keep ~/.claude-mem on a POSIX filesystem (not FAT/exFAT/SMB) if you store tokens there.","After any warning, rotate secrets that may have been world-readable, then chmod 600.","On Windows, restrict the parent folder's ACL to your user as the equivalent control.","Include a mode check in provisioning scripts: fail the pipeline when mode != 600."],"tags":["permissions","security","chmod","install","settings"],"backgroundTag":"file-permission-error","analyzedSha":"e2d1df569a8f04075d40e92461128ece7cf04c82","analyzedAt":"2026-08-20T23:58:13.836Z","schemaVersion":2},"datasetVersion":"2026-08-29T07:17:48.351Z"}