Onchain OS Audit Log

Provide the audit log file path for developers to troubleshoot issues offline.

Response

Tell the user:

1. Log file path: ~/.onchainos/audit.jsonl (or $ONCHAINOS_HOME/audit.jsonl if the env var is set)
2. Format: JSON Lines, one JSON object per line
3. First line (device header): {"type":"device","os":"<os>","arch":"<arch>","version":"<cli_version>"} — written once when the log file is created; preserved across rotations
4. Entry fields: ts (local time with timezone, e.g. 2026-03-18 +8.0 18:00:00.123), source (cli/mcp), command, ok, duration_ms, args (redacted), error
5. Rotation: max 10,000 lines, auto-keeps the device header + most recent 5,000 entries

Do NOT read or display the file contents in the conversation.