New rules added:
- Two LLM work modes: Execution (fazer) vs Review (conferir)
- Rust code only in architecture.md (gbapp chapter)
- Scan and delete misplaced ALL_CAPS.md files
- HTMX-first: minimize JS, delegate to server
- Local assets only: no CDN references
- Documentation validation process for chapters
- No dead code: implement real code, never use _ prefix
- cargo audit must pass with 0 warnings
- diesel only, remove sqlx references
- Library consolidation guidance