5407c04682
New docs/FEATURE-FLAGS.md captures when to add a flag, where the moving parts live, how to use useFeatureFlag from app code, the 4 states + 4 scope axes, kill-switch flow, naming conventions, and the parts we know aren't built yet (partnerSlug eval context, user-level flags, audit-log integration, server-side cache). CLAUDE.md gets a one-line convention entry under "Code conventions" so future devs notice it when grepping for code rules. NEXT-STEPS.md is updated: the feature-flag backend follow-up is now ticked done with a pointer to FEATURE-FLAGS.md for the remaining sub-tasks, and the "What landed" section reflects the real Infrastructure + Flags pages and the notification drawer.