- Rename shop-api-reference.md to storefront-api-reference.md - Update all /api/v1/shop paths to /api/v1/storefront - Add cart, catalog, checkout modules to module-system.md - Update API index to reference Storefront API - Mark Phase 7 as complete in PLAN document Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>