# Learnings - Wave 1

## Task 1: Express Backend Foundation

### What worked well
- Used `bun add` to install dependencies - fast and straightforward
- tsx is already available in devDependencies, so no additional setup needed
- CORS configured to allow `http://localhost:3000` (frontend)
- Health endpoint returns expected JSON: `{"status":"ok"}`

### Dependencies added
- express@5.2.1
- cors@2.8.6
- @types/express@5.0.6
- @types/cors@2.8.19

### Files created/modified
- Created: `server/index.ts`
- Modified: `package.json` (added `"server": "tsx server/index.ts"` script)

### Verification
- `curl http://localhost:3001/api/health` returns `{"status":"ok"}` ✓

### Notes
- Server runs on port 3001 to avoid conflict with frontend on port 3000
- Minimal setup - no authentication, no WebSocket support (as per requirements)
- Evidence saved to `.sisyphus/evidence/task-1-health-check.json`
