backend-buildinglisted

# Backend Building **Stack**: tRPC + Drizzle ORM + Hono + MySQL + OAuth 2.0 A backend-only skill that grafts onto an existing `webapp-building` project. It adds `api/`, `contracts/` directories and optionally `db/` — but **never replaces or modifies** existing frontend files. **Prerequisite**: An existing project created by `webapp-building`. ## Features Features can be installed incrementally. Base infrastructure (Hono server, tRPC, contracts) is always installed automatically on first run. | Feature | What it provides | Dependencies | |---------|-----------------|--------------| | `db` | Drizzle ORM + MySQL — adds `db/`, `api/queries/connection.ts`, `drizzle.config.ts` | — | | `auth` | Kimi OAuth + user management — adds `api/kimi/`, Login page, useAuth, AuthLayout | requires `db` (auto-included) | Default: `init.sh "App"` with no `--features` → defaults to `auth` (= db + auth), preserving backward compat. ## Workflows **Frontend-first** (recommended when UI is already built): 1. `webapp-building` init → develop UI pages and components 2. `backend-building` graft (this skill) — auto-wires tRPC providers and routes 3. Verify with `npm run check`, then add tRPC routers, database tables, wire frontend to API **Full-stack from scratch** (recommended when backend is needed immediately): 1. `webapp-building` init → immediately graft `backend-building` 2. Verify with `npm run check` 3. Develop frontend and backend together **Incremental features** (add capabilities ov