- CommandDef now uses cmd[] array instead of exec string — no shell splitting
- validateArgs() checks every request arg against allowed list; rejects unknown values
- spawn() called with shell:false (execFile semantics); cwd from config
- Audit log (JSON) per call to stdout → captured by systemd journal
- commands.yml.example updated to new schema with 4 read-only commands
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>