# Walkup Implementation Plan

## Scope
- React PWA frontend.
- FastAPI backend.
- TeamSnap JavaScript SDK on the client.
- Server-side TeamSnap OAuth code exchange and refresh.
- Backend stores only app-owned data and TeamSnap external IDs.

## Initial Deliverables
- Thin TeamSnap auth/session backend.
- Media upload and clip registration flow.
- Game assignment and operator session APIs.
- Installable React PWA shell with offline-ready game prep scaffolding.
- Docker-based local development stack.

## Known Constraints
- TeamSnap entities should not be durably mirrored on the backend.
- Operator lineup changes are local-session state in v1.
- Browser clip editing is first-class; backend finalizes playback assets.