# REPO_MAP.md (Auto-Generated Modular Index) > Hard Rule: Max 200 lines per file. Read ONLY the contract and target feature folder. | Path | Lines | Layer / Responsibility | |------|-------|------------------------| | `contracts/DESIGN_SYSTEM.md` | 8 ✅ | contract | | `contracts/OPENAPI.yaml` | 4 ✅ | contract | | `contracts/PRD.md` | 6 ✅ | contract | | `contracts/WEB_REFERENCES.md` | 8 ✅ | contract | | `backend/app/modules/core/router.py` | 2 ✅ | backend-module | | `frontend/src/features/PreviewApp.html` | 36 ✅ | frontend-fsd | | `frontend/src/features/PreviewDev.html` | 36 ✅ | frontend-fsd | | `frontend/assets/hero.jpg` | 17652 ⚠️ OVER 200L | frontend-fsd | | `frontend/assets/logo.jpg` | 12227 ⚠️ OVER 200L | frontend-fsd |