Replace the Project knowledge section with two clearer sections:

- Documentation: docs/ is the project's living specification, not just
  human reference — keep it current with code, and for non-trivial changes
  align docs to the intended end state before implementing (docs-first).
- NAVI.md: a lightweight, pointer-shaped hints file at project root (not a
  source of truth) that tells the agent where to look; capped at ~150 lines
  with a defined structure (Project / Commands / Where to start / Docs index
  / Gotchas / Open decisions), kept distinct from docs/ (spec) and memory
  (global cross-project facts).

Instruction-only: the agent reads NAVI.md via filesystem; no auto-inject.
Applies to navi_code only.

Co-Authored-By: Claude <noreply@anthropic.com>