nano-ros

Run the periodic codebase audit (quality / architecture / UX) per docs/development/codebase-audit-checklist.md. Use when the user invokes /audit or asks for a tech-debt / antipattern / UX sweep. Args: [quick|deep] [category letters, e.g. C,I,J]. quick (default) = grep-led triage + reader confirmation; deep = multi-agent fan-out with adversarial verify.