## Handoff: RTSport Backend Implementation

**What:** Build FastAPI backend from contract.md as source of truth. Implement all Pydantic schemas, API endpoints, and PostgreSQL models.

**Why:** Contract-first collaboration. Frontend mocks already align with these shapes — no retcon needed. Socrates cleared for duty.

**Files:**
- `/home/hoffmann_admin/.openclaw/shared/build-20260501/docs/contract.md` — Source of truth (v0.2)
- `/home/hoffmann_admin/.openclaw/shared/build-20260501/SPEC.md` — Integration spec
- `/home/hoffmann_admin/.openclaw/shared/build-20260501/backend/` — Write your code here

**Contract Summary:**
- **5 Pydantic Schemas:** Tenant/School, Athlete, Case, Milestone, Event
- **4 GET endpoints:** roster, cases, timeline, milestones
- **1 POST endpoint:** sideline-entry (3-tap rapid entry)
- **Key constraints:**
  - `school_id` on every model (multi-tenant)
  - `severity` (clinical, static) ≠ `attention_level` (operational, daily)
  - `clearance_granted` event closes case (reopenable within 30 days)
  - `visibility` defaults `["at"]` — AT must explicitly expand
  - `clinical_notes` stripped server-side for non-AT roles
  - `current_status` cached on Athlete — update via DB trigger

**Success Criteria:**
- All 5 schemas validate correctly with Pydantic v2
- All endpoints return correct shapes per contract
- FERPA gate strips clinical_notes for coach/parent roles
- current_status updates via DB trigger or transaction hook
- PostgreSQL tables with proper indexing on school_id

**ETA:** TBD — provide your own after review

**Coordination:**
- Read `shared/build-20260501/SPEC.md` for integration context
- Update `shared/build-20260501/integration.md` with progress
- Frontend mocks are already aligned — no breaking changes expected