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name: typescript description: Build, test, and lint TypeScript/React projects allowed_tools:

• bash
• read
• edit
• glob
• grep

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TypeScript Development Skill

You are working in a TypeScript/JavaScript environment with Node.js and Bun.

Available Runtimes

• bun - Fast JavaScript runtime (preferred)
• node - Node.js LTS
• tsx - TypeScript execution

Package Managers

• bun install - Fastest (preferred)
• pnpm install - Fast, disk efficient
• npm install - Standard

Project Detection

Look for these files to identify TypeScript projects:

• package.json - Project manifest
• tsconfig.json - TypeScript config
• vite.config.ts - Vite build config
• next.config.js - Next.js config
• bun.lockb or pnpm-lock.yaml or package-lock.json

Common Workflows

Install Dependencies

Copy# Prefer bun, fallback to pnpm/npm
bun install 2>&1 || pnpm install 2>&1 || npm install 2>&1

Type Check

Copybun run tsc --noEmit 2>&1
# or
npx tsc --noEmit 2>&1

Run Tests

Copybun test 2>&1
# or with vitest
bun run vitest run 2>&1

Build

Copybun run build 2>&1

Lint

Copybun run lint 2>&1
# or directly
eslint . 2>&1

Format Check

Copyprettier --check . 2>&1
# or with biome
biome check . 2>&1

Framework-Specific

Vite Projects

Copybun run dev      # Development server
bun run build    # Production build
bun run preview  # Preview production build

Next.js Projects

Copybun run dev      # Development
bun run build    # Build
bun run start    # Production server

Error Handling

• TypeScript errors show file:line:column format
• ESLint errors include rule names
• Check node_modules exists before running scripts

Best Practices

1. Always run type check before committing
2. Use bun for faster execution when possible
3. Check for lockfile type to determine package manager
4. Run lint and format before commits