API Development Agent Skills

MCP Builder

Constructs high-quality Model Context Protocol (MCP) servers to enable seamless integration between LLMs and external services.

GraphQL API Design

Designs efficient GraphQL schemas, implements optimized resolver patterns, and manages query complexity for high-performance APIs.

Backend JWT Authentication

Implements secure JWT authentication middleware and user isolation patterns for Python-based backends.

REST API Design

Architects intuitive, scalable, and standardized RESTful web services using industry-best practices for resource modeling and HTTP semantics.

Express.js Server Fundamentals

Bootstraps production-ready Express.js servers with TypeScript, security middleware, and robust routing patterns.

API Architecture & Design

Architects robust, production-ready API systems by implementing versioning, security, rate limiting, and observability best practices.

REST API Design Patterns

Implements standardized RESTful API structures, including pagination, filtering, and robust error handling patterns for backend services.

Authentication & Authorization Patterns

Implements secure user authentication, token management, and role-based access control using industry-standard patterns.

Express Middleware Patterns

Implements production-ready Express.js middleware for authentication, validation, error handling, and security.

Architecture Patterns Specialist

Identifies, analyzes, and applies standardized software architecture patterns to ensure scalable and maintainable codebases.

Canary Schema & API Workflow

Synchronizes OpenAPI schema changes across TypeScript monorepos by automating type generation, client updates, and data layer propagation.

DHH Rails Style

Implements 37signals' opinionated Ruby on Rails conventions to build lean, maintainable, and REST-pure applications.

Andrew Kane Ruby Gem Writer

Builds production-ready Ruby gems using Andrew Kane's proven patterns for simplicity, minimal dependencies, and clean API design.

Ashby API Guide

Provides comprehensive documentation and implementation patterns for interacting with the Ashby Applicant Tracking System (ATS) via MCP tools.

Zod 4 Schema Validation

Implements robust TypeScript-first schema validation and parsing using optimized Zod v4 patterns.

Tool Design for Agents

Provides architectural principles and best practices for designing high-performance tools and MCP interfaces for AI agents.

Agent Tool Design

Optimizes AI agent performance through expert tool architecture, consolidation strategies, and high-precision Model Context Protocol (MCP) design.

Zod Schema Validation

Implements runtime type safety and schema validation for TypeScript applications using Zod.

Mapper Runtime Validation

Validates data mappers by comparing raw API payloads against mapped outputs to detect missing fields and type mismatches.

Backend TDD Implementation Engineer

Executes backend development tasks using a strict Test-Driven Development (TDD) workflow and structured task management.

Zustand Store Action Generator

Automates the creation of asynchronous Zustand store actions with built-in loading states, error handling, and toast notifications.

MCP Server Development

Guides the creation of robust Model Context Protocol (MCP) servers and tool integrations for LLM-driven workflows.

Functional Dependency Injection Pattern

Enforces the fn(args, deps) architectural pattern to promote testability and maintainable code through explicit dependency injection.

Backend Design

Architects robust backend systems, scalable APIs, and production-ready data models with a focus on reliability and security.

TypeScript Clean Architecture API Development

Builds and extends scalable TypeScript Express APIs using Clean Architecture, Inversify DI, and Prisma ORM.

Backend Error Handling

Standardizes typed and composable backend error handling with automated HTTP boundary mapping.

Rust Type-Driven Design

Leverages the Rust type system to encode invariants and make invalid states unrepresentable at compile-time.

Microservices Architecture Patterns

Implements robust microservices architectures using proven design patterns for service boundaries, event-driven communication, and distributed system resilience.

Symfony BLL Service Generator

Generates standardized Business Logic Layer (BLL) services for Symfony StarterKit projects to bridge API calls and application logic.

AlgoKit Utils Integration

Streamlines Algorand blockchain interactions in TypeScript and Python using the official AlgoKit Utils library.