Stop Burning Tokens. Master Claude Code in One Afternoon.

# Project: [Your App Name]

## Stack
React 19 + Next.js 15 (App Router), TypeScript strict, Tailwind CSS
Database: Prisma + PostgreSQL | Auth: NextAuth v5

## Rules
- ALWAYS use Server Components by default. Add "use client" only when needed
- NEVER use `any` type. Use `unknown` + type narrowing
- Components go in /src/components/[Feature]/[Component].tsx
- API routes: /src/app/api/[resource]/route.ts
- All async functions must have try/catch with proper error types

## Testing
- Vitest + React Testing Library for unit tests
- Test files: [Component].test.tsx colocated with component
- Run: npm test -- --watch

## Forbidden
- No default exports except pages/layouts
- No console.log in committed code (use logger util)
- No direct DOM manipulation
- No `git push --force` or `rm -rf`

// .claude/settings.json
{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Bash",
        "command": "echo '$TOOL_INPUT' | jq -r '.command' | grep -qE '(rm -rf|git reset --hard|git push.*force|DROP TABLE)' && echo 'BLOCKED: Destructive command detected' && exit 1 || exit 0"
      }
    ]
  }
}