Write modern JavaScript/TypeScript applications using ES6+ patterns and advanced type safety, build Node.js backends with Express/Fastify, implement testing with Jest/Vitest, and scaffold projects for Next.js, React, and CLIs.

Guides end-to-end API platform development: designing REST, GraphQL, and WebSocket APIs with OpenAPI specs, implementing secure authentication and authorization, building production-ready endpoints, load testing with k6, and setting up monitoring with Prometheus, Grafana, and OpenTelemetry.

Access expert guidance for modern JavaScript/TypeScript development: Node.js architecture and runtime choice, Next.js App Router with Server Components, React performance optimization across 45 rules, and advanced type-level programming, monorepo management, and migration strategies.

Build production-ready Node.js backend services with Express or Fastify, implementing middleware patterns, error handling, authentication, database integration, and API design best practices for REST APIs, GraphQL backends, or microservices architectures.

Master advanced TypeScript patterns and type transformations, build Fastify backends with OAuth 2.0, debug Node.js internals, enforce code quality with ESLint, manage git/GitHub workflows, and create polished documentation and code snippets.

Guides development of Fastify Node.js backend servers and REST APIs using TypeScript or JavaScript, covering routes, plugins, schema validation, error handling, auth, CORS, databases, WebSockets, and production deployment.

Designs complete API specifications including endpoints, request/response shapes, error codes, auth patterns, and pagination, following Stripe's consistency principles. Use when asked to design an API, build endpoints, or create a REST API.

Design APIs, generate system architectures, fix performance bottlenecks, audit backend codebases, and scaffold production-ready services with Docker and structured logging.

Generates and implements prioritized security hardening specs for backend services, covering auth patterns, security headers, rate limiting, input validation, secrets management, and dependency hygiene.

Provides Node.js backend conventions and an agent that builds features end-to-end for Express, Fastify, Koa, Hapi, or plain Node projects, automatically detecting package manager, module system, TypeScript config, and validation library.

Enforces a strict TypeScript monorepo architecture with Result types, vertical slices, Biome tooling, node:test, and Fastify patterns. Scaffolds projects, reviews code/PRs, generates commits/issues, and audits accessibility.

Provides specialized agents and skills for full-stack TypeScript development, enabling code generation, debugging, testing, security audits, performance optimization, and Docker containerization across React/Next.js frontends and Fastify/Drizzle/PostgreSQL backends.

Modern JavaScript and TypeScript development with ES6+, Node.js backends (Express/Fastify), advanced TypeScript types, and project scaffolding for Next.js, React+Vite, and Node.js APIs using pnpm and testing tools.