Languages & Frameworks for Claude Code

Use this agent when you need to build fault-tolerant, concurrent systems leveraging OTP patterns, GenServer architectures, and Phoenix framework for real-time applications. Specifically:\\n\\n<example>\\nContext: Building a real-time chat application with WebSocket support, process supervision, and multi-node clustering.\\nuser: \"I need to create a Phoenix LiveView chat app with custom GenServer state management, WebSocket channels, and the ability to cluster across multiple nodes. What's the b

Use when developing firmware for resource-constrained microcontrollers, implementing RTOS-based applications, or optimizing real-time systems where hardware constraints, latency guarantees, and reliability are critical. Specifically:\\n\\n<example>\\nContext: A team is building firmware for an STM32F4-based IoT sensor that must operate on battery power for 6 months with strict latency requirements.\\nuser: \"We need firmware for a temperature/humidity sensor running on STM32F4 with 48KB RAM. Mus

Expert Next.js 16 developer specializing in App Router, Server Components, Cache Components, Turbopack, and modern React patterns with TypeScript

Expert React 19.2 frontend engineer specializing in modern hooks, Server Components, Actions, TypeScript, and performance optimization

Use when building cross-platform mobile applications with Flutter 3+ that require custom UI implementation, complex state management, native platform integrations, or performance optimization across iOS/Android/Web. Specifically:\\n\\n<example>\\nContext: Building a feature-rich social media app that needs custom animations, platform-specific native features (biometric auth, camera), and 60fps performance on both iOS and Android\\nuser: \"We need a high-performance Flutter app with custom Materi

| Use this agent when you need to review code changes in a pull request or after writing/modifying code. The agent performs comprehensive code review following established team standards, categorizing findings as Critical Issues, Suggestions, or Praise. It's particularly suited for reviewing backend (Golang/Protobuf/Postgres) and frontend (Flutter/Riverpod/GetX) code. Examples: <example> Context: After implementing a new API endpoint user: "I've added a new user profile update endpoint" assistan

Use when building complete frontend applications across React, Vue, and Angular frameworks requiring multi-framework expertise and full-stack integration. Specifically:\n\n<example>\nContext: Starting a new React frontend for an e-commerce platform with complex state management and real-time updates\nuser: \"Build a React frontend for product catalog with filtering, cart management, and checkout flow. Need TypeScript, responsive design, and 85% test coverage.\"\nassistant: \"I'll create a scalab

Use this agent when you need to build complete features spanning database, API, and frontend layers together as a cohesive unit. Specifically:\\n\\n<example>\\nContext: User wants to build a new user authentication system for a web application that requires database schema, API endpoints, and frontend forms.\\nuser: \"Build a complete user registration feature with PostgreSQL schema, Node.js API endpoints, and React forms including validation and error handling.\"\\nassistant: \"I'll implement t

Use this agent when implementing game systems, optimizing graphics rendering, building multiplayer networking, or developing gameplay mechanics for games targeting specific platforms. Specifically:\\n\\n<example>\\nContext: A Unity game needs to maintain 60 FPS across mobile platforms but currently drops to 30 FPS during heavy particle effects and enemy AI pathfinding.\\nuser: \"Our game is struggling with FPS on mobile. How do we optimize without cutting features?\"\\nassistant: \"I'll profile

Code review and analysis with the sardonic wit and technical elitism of Bertram Gilfoyle from Silicon Valley. Prepare for brutal honesty about your code.

Expert assistant for building Model Context Protocol (MCP) servers in Go using the official SDK.

Use when building Go applications requiring concurrent programming, high-performance systems, microservices, or cloud-native architectures where idiomatic patterns, error handling excellence, and efficiency are critical. Specifically:\\n\\n<example>\\nContext: Building a gRPC-based microservice that handles thousands of concurrent requests with strict latency requirements and needs proper error propagation and graceful shutdown\\nuser: \"Create a gRPC service in Go that can handle 10k concurrent

Use this agent when designing or evolving GraphQL schemas across microservices, implementing federation architectures, or optimizing query performance in distributed graphs. Specifically:\n\n<example>\nContext: A team is building a multi-service architecture and needs to design a federated GraphQL schema.\nuser: \"We have three services (users, orders, products) that need to be exposed through a unified GraphQL API. Can you design the federation structure?\"\nassistant: \"I'll analyze your servi

GraphQL API security and authorization specialist. Use PROACTIVELY for GraphQL security audits, authorization implementation, query validation, and protection against GraphQL-specific attacks. <example> <user_request>Audit our GraphQL API before launch — we're worried about DoS attacks and data leaks through introspection.</user_request> <commentary>The agent will assess query depth/complexity limits, alias/batching overload protection, introspection exposure, CSRF on the GraphQL endpoint, and r

Native iOS development specialist with Swift and SwiftUI. Use PROACTIVELY for iOS applications, UIKit/SwiftUI components, Core Data integration, app lifecycle management, and App Store optimization.

Use this agent when designing enterprise Java architectures, migrating Spring Boot applications, or establishing microservices patterns for scalable cloud-native systems. Specifically:\\n\\n<example>\\nContext: A team needs to refactor a monolithic Spring application into microservices with proper service boundaries and inter-service communication.\\nuser: \"We need to design a microservices architecture for our legacy Spring Boot monolith with 15 services. Current bottlenecks are the shared dat

Expert assistance for building Model Context Protocol servers in Java using reactive streams, the official MCP Java SDK, and Spring Boot integration.

Use this agent when you need to build, optimize, or refactor modern JavaScript code for browser, Node.js, or full-stack applications requiring ES2025 features, async patterns, or performance-critical implementations. Specifically:\\n\\n<example>\\nContext: User has a legacy callback-based Node.js service and wants to modernize it with async/await, implement proper error handling, and optimize memory usage.\\nuser: \"I have an old Node.js service with callback hell. Can you refactor it to use mod

Expert assistant for building Model Context Protocol (MCP) servers in Kotlin using the official SDK.

Use when building Kotlin applications requiring advanced coroutine patterns, multiplatform code sharing, or Android/server-side development with functional programming principles. Specifically:\\n\\n<example>\\nContext: Building a cross-platform mobile application sharing business logic between Android and iOS using Kotlin Multiplatform Mobile (KMM)\\nuser: \"We're creating a social media app targeting both Android and iOS. How do we structure a KMM project to maximize shared code while maintain

Expert Laravel development assistant specializing in modern Laravel 12+ applications with Eloquent, Artisan, testing, and best practices

Use when building Laravel 10+ applications, architecting Eloquent models with complex relationships, implementing queue systems for async processing, or optimizing API performance. Specifically:\\n\\n<example>\\nContext: Building a new Laravel 10 SaaS application from scratch with multi-tenancy, real-time features, and complex database design\\nuser: \"I need to build a Laravel 10 SaaS platform for task management. Requirements: multi-tenant architecture, real-time notifications via WebSockets,

Expert at implementing internationalization (i18n) in web applications using a systematic, checklist-driven approach.

MCP protocol specification and standards specialist. Use PROACTIVELY for protocol design, specification compliance, transport implementation, and maintaining standards across the ecosystem.

MCP server architecture and implementation specialist. Use PROACTIVELY for designing servers, implementing transport layers, tool definitions, completion support, and protocol compliance.

Create, update, refactor, explain or work with code using the .NET version of Microsoft Agent Framework.

Create, update, refactor, explain or work with code using the Python version of Microsoft Agent Framework.

Use this agent when developing iOS and Android mobile applications with focus on native or cross-platform implementation, performance optimization, and platform-specific user experience. This agent covers both platforms (native iOS + native Android, or cross-platform frameworks spanning both); for iOS-only work use ios-developer, and for React Native/Flutter-first cross-platform projects use mobile-developer. Specifically:\\n\\n<example>\\nContext: Project requires building a high-performance na

Use this agent when building cross-platform mobile applications requiring native performance optimization, platform-specific features, and offline-first architecture. Use for React Native and Flutter projects where code sharing must exceed 80% while maintaining iOS and Android native excellence. Specifically:\\n\\n<example>\\nContext: User is starting a new React Native project that needs to support iOS 18+ and Android 15+ with biometric authentication and offline data synchronization.\\nuser: \

Work with Microsoft SQL Server databases using the MS SQL extension.

AI agent that generates simple, high-quality Python Neo4j client libraries from GitHub issues with proper best practices

Neon database architecture specialist. Use PROACTIVELY for database schema design, Drizzle ORM integration, query optimization, and serverless performance tuning. Expert in connection management and database migrations.

Master of Next.js best practices, App Router, Server Components, and performance optimization. Use PROACTIVELY for Next.js architecture decisions, migration strategies, and framework optimization.

NoSQL database specialist for MongoDB, Redis, Cassandra, and document/key-value stores. Use PROACTIVELY for schema design, data modeling, performance optimization, and NoSQL architecture decisions.

Expert assistant for PHP MCP server development using the official PHP SDK with attribute-based discovery

Use this agent when working with PHP 8.3+ projects that require strict typing, modern language features, and enterprise framework expertise (Laravel or Symfony). Use when building scalable applications, optimizing performance, or requiring async/Fiber patterns. Specifically:\\n\\n<example>\\nContext: Developer needs to refactor a legacy PHP codebase to PHP 8.3 with strict types and modern patterns.\\nuser: \"I have a Laravel 10 project that's still using mixed types and older patterns. Can you h

Expert Pimcore development assistant specializing in CMS, DAM, PIM, and E-Commerce solutions with Symfony integration