mcp-builder
Build high-quality MCP servers in Python FastMCP or TypeScript to connect LLMs to external services
182k GitHub starsupdated Apr 21, 2026
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Build high-quality MCP servers in Python FastMCP or TypeScript to connect LLMs to external services
Run zero-downtime database migrations with data transformations and rollback procedures
Design and review PostgreSQL schemas with the right data types, indexes, constraints, and features
Optimize React and Next.js performance using Vercel Engineering guidelines when writing or reviewing code
Building high-performance async Python APIs with FastAPI and Pydantic V2. Invoke to create REST endpoints, define Pydantic models, implement authentication flows, set up async SQLAlchemy database operations, add JWT authentication, build WebSocket endpoints, or generate OpenAPI documentation. Trigger terms: FastAPI, Pydantic, async Python, Python API, REST API Python, SQLAlchemy async, JWT authentication, OpenAPI, Swagger Python.
Build cross-platform Flutter 3 apps in Dart with Riverpod/Bloc, GoRouter, and performance tuning
Creates and configures NestJS modules, controllers, services, DTOs, guards, and interceptors for enterprise-grade TypeScript backend applications. Use when building NestJS REST APIs or GraphQL services, implementing dependency injection, scaffolding modular architecture, adding JWT/Passport authentication, integrating TypeORM or Prisma, or working with .module.ts, .controller.ts, and .service.ts files. Invoke for guards, interceptors, pipes, validation, Swagger documentation, and unit/E2E testing in NestJS projects.
Building PHP applications with modern PHP 8.3+ features, Laravel, or Symfony frameworks. Invokes strict typing, PHPStan level 9, async patterns with Swoole, and PSR standards. Creates controllers, configures middleware, generates migrations, writes PHPUnit/Pest tests, defines typed DTOs and value objects, sets up dependency injection, and scaffolds REST/GraphQL APIs. Use when working with Eloquent, Doctrine, Composer, Psalm, ReactPHP, or any PHP API development.
Build and optimize React Native and Expo apps with navigation, native modules, and fast FlatLists
Build advanced TypeScript type systems with generics, type guards, branded types and end-to-end type-safe tRPC
Set up Python projects with uv, ruff, and ty, and migrate from pip, Poetry, mypy, or black
Apply this skill whenever writing, reviewing, or refactoring Laravel PHP code. This includes creating or modifying controllers, models, migrations, form requests, policies, jobs, scheduled commands, service classes, and Eloquent queries. Triggers for N+1 and query performance issues, caching strategies, authorization and security patterns, validation, error handling, queue and job configuration, route definitions, and architectural decisions. Also use for Laravel code reviews and refactoring existing Laravel code to follow best practices. Covers any task involving Laravel backend PHP code patterns.
Handle Go errors idiomatically with %w wrapping, errors.Is/As, custom types, panic/recover, and slog
MUST be used for Vue.js tasks. Strongly recommends Composition API with `<script setup>` and TypeScript as the standard approach. Covers Vue 3, SSR, Volar, vue-tsc. Load for any Vue, .vue files, Vue Router, Pinia, or Vite with Vue work. ALWAYS use Composition API unless the project explicitly requires Options API.