pnpm install

# Start both frontend and backend
pnpm run dev

# Start separately
cd pkg/be && pnpm run dev   # Backend :8765
cd pkg/fe && pnpm run dev   # Frontend :5173

arche/
├── pkg/
│   ├── be/    # Backend (Hono + Cloudflare Workers)
│   └── fe/    # Frontend (React + TanStack Start)
└── ...