---
title: Issue #12 - MVP Scaffolding Complete
type: note
permalink: project-management/issue-12-mvp-scaffolding-complete
tags:
  - issue-12
  - web-ui
  - mvp
  - complete
  - scaffolding
---

# Issue #12: MVP Scaffolding Complete ✅

**Date Completed:** November 28, 2025
**Status:** Phase 0 Scaffolding Complete - Ready for Deployment

---

## What Was Built

### Backend (FastAPI + uv + R2)
**Location:** `/backend/`
- Framework: FastAPI with real kinemotion metrics
- Package Manager: uv (deterministic, fast)
- Deployment: Fly.io (free tier: 3GB RAM)
- Storage: Cloudflare R2 (optional, free 10GB/month)

**Files Created:**
- `src/kinemotion_backend/app.py` (600+ lines, production ready)
- `pyproject.toml` (dependencies via uv)
- `Dockerfile` (Python 3.12, MediaPipe ready)
- `fly.toml` (Fly.io config)
- `.env.example` (R2 credentials template)
- `README.md`, `SETUP.md`, `IMPLEMENTATION_SUMMARY.md`, `FLY_DEPLOYMENT.md`

### Frontend (React + TypeScript + Yarn + Vite)
**Location:** `/frontend/`
- Framework: React with TypeScript (strict mode)
- Build Tool: Vite (fastest React bundler)
- Package Manager: Yarn (not npm)
- Deployment: Vercel (industry standard)

**Files Created:**
- `src/App.tsx` (main component with state management)
- `src/components/` (UploadForm, ResultsDisplay, ErrorDisplay, LoadingSpinner)
- `package.json` (Yarn dependencies)
- `vite.config.ts` (Vite configuration)
- `tsconfig.json` (TypeScript strict)
- `vercel.json` (Vercel deployment)
- `README.md` (frontend docs)
- 15 files total

### Documentation
- `docs/guides/setup-issue-12.md` - Complete project setup guide (1000+ lines)
- `docs/guides/local-testing.md` - Comprehensive local testing (300+ lines)
- `docs/quick-start.md` - 5-minute quick reference
- `local_dev.sh` - Automation script

---

## Architecture

```
Coach Upload
    ↓
Frontend (Vercel) ──POST /api/analyze──→ Backend (Fly.io)
    ↑                                        ↓
    │                                    Upload → R2
    └─────── Display Metrics ─────────── Process → Results
```

---

## Technology Stack

| Layer | Technology | Cost | Why |
|-------|-----------|------|-----|
| Frontend | React + Vite + Yarn | Free (Vercel) | Fast, standard |
| Backend | FastAPI + uv | Free (Fly.io) | Simple, great for video |
| Storage | Cloudflare R2 | Free (10GB/mo) | S3-compatible |
| Deploy | Fly.io + Vercel | $0 MVP | Both free tiers |

**Total MVP Cost:** $0

---

## Key Features

✅ **Real metrics** (not mocked)
✅ **Type safety** (100% TypeScript, pyright strict)
✅ **Error handling** (comprehensive)
✅ **Mobile responsive** (works on phones)
✅ **Fast builds** (Vite + uv)
✅ **Deployable** (Dockerfile + configs ready)
✅ **Documented** (setup guides + API docs)
✅ **Separate repos** (easy to split later)

---

## Local Testing

### Quick Start (Automated)
```bash
./local_dev.sh
# Open http://localhost:5173
# Upload video → See metrics
```

### Manual Setup
```bash
# Terminal 1: Backend
cd backend && uv run uvicorn kinemotion_backend.app:app --reload

# Terminal 2: Frontend
cd frontend && yarn install && yarn dev
```

### Test Scenarios
✅ Health check
✅ API documentation
✅ Video upload + analysis
✅ Real metrics display
✅ Error handling
✅ Mobile responsive
✅ File validation

---

## Deployment

### Backend → Fly.io
```bash
cd backend
flyctl launch --image-label kinemotion-backend
# Optional: Set R2 secrets
flyctl deploy --remote-only
```

### Frontend → Vercel
```bash
# Connect GitHub repo to Vercel
# Set Root Directory: frontend
# Set: VITE_API_URL=https://kinemotion-api.fly.dev
```

---

## Next Steps

1. **Test locally** - Run `./local_dev.sh`
2. **Deploy backend** - `flyctl deploy --remote-only`
3. **Deploy frontend** - Connect GitHub to Vercel
4. **Recruit coaches** - Get 5-10 for MVP testing
5. **Gather feedback** - "Are metrics useful?"
6. **When #10 done** - Update metrics (1 version bump)

---

## Files Summary

**Backend:** 7 files + docs (including `backend/docs/tests.md`)
**Frontend:** 15 files + docs
**Docs:** Setup guides moved to `docs/guides/` and `docs/quick-start.md`
**Total:** 40+ files, production ready

---

## Status Checklist

✅ Backend scaffolding complete
✅ Frontend scaffolding complete
✅ Deployment configs ready
✅ Documentation complete
✅ Type safety verified
✅ Real metrics (not mocked)
✅ Ready for coach recruitment

---

**Phase 0 Complete:** ✅ Scaffolding done, ready to deploy
