What problem does it solve? Building modern web applications requires coordinating frontend components, backend APIs, databases, and deployment pipelines, which is complex and error-prone without structured guidance. This Skill provides architecture patterns, best practices, and working code examples for the entire full-stack development lifecycle. ## Core Features & Use Cases - Frontend Development: React and Next.js patterns including hooks, component design, state management with React Query and Zustand, and TypeScript typing. - Backend API Development: REST and GraphQL API design with Express or Next.js API routes, Zod validation, JWT/OAuth authentication, and proper error handling. - Database Integration: PostgreSQL and MongoDB data modeling with Prisma ORM, plus Redis caching strategies. - Use Case: Ask for a blog post API and receive a complete Next.js route handler with Zod validation, Prisma schema, migration commands, and setup instructions. ## Quick Start Ask the assistant to create a REST API endpoint for managing users with Next.js, Prisma, and PostgreSQL.