docs: Add AI agent documentation and navigation hub

- Create  directory for AI coding agents and new developers
- Add  as the main navigation hub and entrypoint
- Add project context files: , , , , ,
- Add development guidelines and architecture decisions: ,  (including 429 error handling and 10-year DCF logic)
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whitesmoke-sketch
2026-02-14 22:51:03 +09:00
parent 102e6fd9c0
commit e5b6500ff2
10 changed files with 184 additions and 0 deletions
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