extension-backendlisted

# Extension Backend Build a secure, maintainable backend API for a Chrome extension. Recommended stack: **NestJS + MongoDB (Mongoose)**. ## When to Activate Activate this skill when extension work requires: - License verification / payment webhooks - User authentication / account management - Data sync across devices - External API proxy (hide API keys from extension) - Any server-side logic ## Workflow (Execute This) ### Step 1: Ask user to confirm requirements 1. **Do you need a backend?** (explain why: API keys, auth, payments, sync) 2. **Stack preference**: NestJS + MongoDB (recommended) or custom? 3. **Hosting target**: Vercel / Railway / Fly.io / AWS / self-hosted? 4. **Features needed** (pick from): - User auth (Google OAuth via chrome.identity) - License/subscription verification - Payment webhooks (Stripe, Paddle, etc.) - Data sync / storage API - External API proxy - Rate limiting ### Step 2: Fetch framework docs Use `docs-seeker` skill to fetch latest docs: - **NestJS**: https://docs.nestjs.com/ - **Mongoose**: https://mongoosejs.com/docs/ - **TypeScript style**: https://google.github.io/styleguide/tsguide.html - **JavaScript style**: https://google.github.io/styleguide/jsguide.html ### Step 3: Scaffold the backend ```bash npx @nestjs/cli new extension-backend --strict --package-manager pnpm cd extension-backend pnpm add @nestjs/mongoose mongoose @nestjs/config class-validator class-transformer pnpm add helmet @nestjs/throttler pnpm add