This skill provides general guidelines for designing backend controller layers across any framework. It should be used when implementing REST endpoints, handling HTTP status codes, managing pagination, or structuring API request/response handling.
Procedural rules and patterns for NestJS backend development. This skill should be used when creating new NestJS modules, services, resolvers, or controllers. It covers component generation with NestJS CLI, TDD patterns, module structure conventions, Lambda handler patterns, and configuration standards. Use this skill alongside nestjs-graphql for GraphQL-specific patterns.
Production-grade backend patterns for Node.js, Python, Go, and Java/Spring frameworks
Design routing and code-splitting strategies that scale to large applications with minimal load-time overhead.
REST, GraphQL, and hybrid API architecture patterns for building scalable and maintainable APIs
Comprehensive backend development guide for Node.js/Express/TypeScript microservices. Use when creating routes, controllers, services, repositories, middleware, or working with Express APIs, Prisma database access, Sentry error tracking, Zod validation, unifiedConfig, dependency injection, or async patterns. Covers layered architecture (routes → controllers → services → repositories), BaseController pattern, error handling, performance monitoring, testing strategies, and migration from legacy patterns.
Comprehensive Ruby on Rails conventions, design patterns, and idiomatic code standards. Use this skill when writing any Rails code including controllers, models, services, or when making architectural decisions about code organization, naming conventions, and Rails best practices. Trigger keywords: rails conventions, design patterns, idiomatic code, best practices, code organization, naming conventions, MVC patterns, Rails architecture
tRPC v11 patterns for Next.js applications with command-query separation. This skill should be used when creating routers, procedures, implementing RBAC, handling errors, or using server caller patterns. Covers rbacProcedure, input validation, output schemas, error mapping, cache invalidation, and type inference.
Spring Boot and Java best practices for SpecFlux backend. Use when developing REST APIs, services, repositories, or any Java code. Applies DDD architecture, OpenAPI-first workflow, transaction management, and test-driven development.
Build backends with Node.js, Python, Go (NestJS, FastAPI, Django). Use for REST/GraphQL/gRPC APIs, auth (OAuth, JWT), databases, microservices, security (OWASP), Docker/K8s.
Expert guidance for ElysiaJS web framework development. Use when building REST APIs, GraphQL services, or WebSocket applications with Elysia on Bun. Covers routing, lifecycle hooks, TypeBox validation, Eden type-safe clients, authentication with JWT/Bearer, all official plugins (OpenAPI, CORS, JWT, static, cron, GraphQL, tRPC), testing patterns, and production deployment. Assumes bun-expert skill is active for Bun runtime expertise.
Build Next.js applications with App Router, Server and Client Components, data fetching, routing, and TypeScript. Use when implementing Next.js pages, layouts, API routes, or React Server Components.
Provides patterns for structuring the API layer in React applications. This skill should be used when setting up API clients, defining API request declarations, or integrating with TanStack Query for data fetching.
Builds high-performance FastAPI applications with async/await, Pydantic v2, dependency injection, and SQLAlchemy. Use when creating Python REST APIs, async backends, or microservices.
Comprehensive guide to building production-ready REST APIs in Rails with serialization, authentication, versioning, rate limiting, and testing
TypeScript patterns for full-stack Next.js applications. This skill should be used when implementing type-safe API contracts, utility types, Zod schema integration, tRPC type inference, or type derivation patterns. Covers RouterOutputs/RouterInputs, branded types, discriminated unions, and server-first typing strategies.
Build production-ready RESTful APIs with Express.js including routing, middleware, validation, and error handling for scalable backend services
Create Express.js API endpoints for IntelliFill following established patterns (Prisma, Supabase auth, Joi validation, Bull queues). Use when creating new API routes, services, or middleware.
FastAPI, REST APIs, GraphQL, data service design, and API best practices
Builds production Express.js APIs with TypeScript, middleware patterns, authentication, and error handling. Use when creating Node.js backends, REST APIs, or Express applications.
Backend development - APIs, authentication, business logic
