Cursor Rules Marketplace

Opinionated Cursor rules for building scalable React applications. Covers component composition, state management patterns, performance optimization, and testing strategies. Based on patterns from large-scale React apps.

Production-grade Cursor rules used by senior engineers at top tech companies. Covers architecture decisions, code review standards, testing strategies, and security best practices. Battle-tested across 50+ production codebases.

A complete Cursor rules bundle for backend engineers — REST API design, PostgreSQL with Drizzle ORM, authentication with JWT, input validation with Zod, error handling, logging, testing, and Docker deployment. 9 rule files covering the full backend stack.

Cursor rules for Swift 6 and SwiftUI — the Observation framework (@Observable, not ObservableObject), SwiftData (not Core Data), structured concurrency, NavigationStack patterns, and strict concurrency checking that Swift 6 enforces.

Opinionated Cursor rules for Next.js 16 — Cache Components with 'use cache', Partial Prerendering (PPR), the new proxy middleware (renamed from middleware.ts), async params/searchParams, and cacheLife/cacheTag patterns. Targets the actual breaking changes, not rehashed docs.

Cursor rules for Axum 0.8+ web APIs — extractors, state management, Tower middleware, error handling with thiserror, SQLx queries, and the ownership patterns that LLMs consistently get wrong. Includes tracing setup and graceful shutdown.

Cursor rules for idiomatic Go API development — net/http with chi router, structured logging with slog, error handling patterns, context propagation, database/sql with pgx, and the project layout that the Go community actually uses (not the 'standard' layout that isn't standard).

A complete Cursor rules bundle for React developers — React 19 patterns, Next.js 16 App Router, TypeScript strict mode, Tailwind CSS v4, testing with Vitest, and accessibility. 8 rule files that work together as a coherent system.

Cursor rules for FastAPI 0.115+ with Pydantic v2 — dependency injection patterns, async/sync router decisions, response models, error handling, middleware, background tasks, and the SQLAlchemy async session pattern that actually works in production.

Cursor rules for Django 5.1+ with Django REST Framework — fat models with custom managers, lean views, serializer patterns, queryset optimization (select_related/prefetch_related), Celery task patterns, and the security settings LLMs always forget.

25 battle-tested refactoring patterns encoded as Cursor rules. Automatically suggests extract method, replace conditional with polymorphism, introduce parameter object, and more.

Cursor rules for Rails 8 — Solid Queue (default job backend), Solid Cache, Kamal 2 deployment, Hotwire (Turbo + Stimulus), Authentication generator, and the Rails conventions LLMs break by writing controller logic in views.

Cursor rules for Flutter 3.27+ with Riverpod 2, Freezed for immutable models, GoRouter for navigation, and the widget decomposition patterns that prevent the 'god widget' problem LLMs love to create.