CLAUDE.md Only ~25%
Stack info + conventions + structure + rules + state — all prose, all mixed together
AI has to figure out the rest
⏱ Parse package.json for actual deps
⏱ Scan directory tree for structure
⏱ Guess architecture from file names
⏱ Re-discover everything next session
Claude only
What does ~25% mean?
AI makes up the other 75%
Without full context, AI hallucinates, makes assumptions, and introduces errors you won't find until production.
.faf + CLAUDE.md 100%
Structure — stack, architecture, project type. YAML. Machine-readable. Scorable.
Instructions only — conventions, rules, current focus. Pure prose. No data.
AI knows instantly
✓ Full stack context in <1ms
✓ Architecture understood, no scanning
✓ Human rules separate from data
✓ Zero drift — faf sync keeps aligned
Claude Cursor Gemini Windsurf Any AI
What does 100% mean?
AI is optimised for your project
Full context, every session, any tool. No guessing. No drift.