vitest

# Vitest Setup Detect the project type, generate the right Vitest configuration, and produce working test infrastructure. Not a reference card — this skill creates files. ## Workflow 1. **Detect** — scan the project to determine type and existing setup 2. **Configure** — generate vitest.config.ts tailored to the environment 3. **Scaffold** — create test setup, utilities, and a sample test 4. **Wire up** — add package.json scripts and TypeScript config ## Step 1: Detect Project Type Read these files to determine the project: ``` package.json → dependencies, scripts, type field tsconfig.json → paths, compiler options wrangler.toml → Cloudflare Workers project vite.config.ts → existing Vite setup (extend, don't replace) vitest.config.ts → already configured? just fill gaps jest.config.* → migration candidate src/ → source structure ``` Classify as one of: | Type | Signals | Environment | |------|---------|-------------| | **Cloudflare Workers** | wrangler.toml, @cloudflare/workers-types, cloudflare vite plugin | `node` with Workers-specific setup | | **React (Vite)** | @vitejs/plugin-react, react-dom | `jsdom` or `happy-dom` | | **React (SSR/TanStack Start)** | @tanstack/start, vinxi | Split: `node` for server, `jsdom` for client | | **Node/Hono API** | hono, express, no react-dom | `node` | | **Library** | exports field, no framework deps | `node` | If a `vite.config.ts` already exists, extend it rather than...