Cursor rules library

Strict TypeScript, React 19, functional components, and accessible UI patterns for Cursor.

Next.js 15 App Router conventions — server components, metadata, and route handlers.

FastAPI best practices — Pydantic models, async routes, and typed dependencies.

Express API patterns with TypeScript, middleware, and error handling.

Idiomatic Rust — ownership, error handling with Result, and clippy-friendly code.

Go service conventions — context propagation, interfaces, and table-driven tests.

Rules for building MCP servers and agentic tools — tool schemas, error surfaces, and safety.

Unit and integration testing patterns — meaningful assertions, no trivial tests.

Tailwind utility-first styling with consistent spacing, responsive design, and a11y.

SQL style guide — migrations, indexes, and parameterized queries.

Security-first coding — input validation, secrets handling, and OWASP awareness.

Clear API docs, README structure, and changelog conventions.