Skill Claude CodeCodex
Go HTTP API development with net/http, Chi, Gin, Echo, and Fiber frameworks.
Skill Claude CodeCodex
Go HTTP API development with net/http, Chi, Gin, Echo, and Fiber frameworks.
Skill Claude CodeCodex
Instrumenting Go applications with OpenTelemetry for distributed tracing, Prometheus for metrics, and structured logging with slog.
Skill Claude CodeCodex
Comprehensive Go testing strategies including table-driven tests, testify assertions, gomock interface mocking, benchmark testing, and CI/CD integration.
Skill Claude CodeCodex
Spring Boot 3.x - Java framework for production-ready applications with dependency injection, REST APIs, data access, security, and actuator monitoring.
Skill Claude CodeCodex
Production-ready Express.js development covering middleware architecture, error handling, security hardening, testing strategies, and deployment patterns.
Skill Claude CodeCodex
FlexLayout for React - Advanced docking layout manager with drag-and-drop, tabs, splitters, and complex window management.
Skill Claude CodeCodex
Hono on Cloudflare Workers - bindings, KV, D1, R2, Durable Objects, and edge deployment patterns.
Skill Claude CodeCodex
Hono ultrafast web framework fundamentals - routing, context, handlers, and response patterns for multi-runtime deployment.
Skill Claude CodeCodex
Hono JSX - server-side rendering, streaming, async components, and HTML generation patterns.
Skill Claude CodeCodex
Hono middleware patterns - creation, composition, built-in middleware, and execution order for web applications.
Skill Claude CodeCodex
Hono RPC - end-to-end type-safe API client generation with hc client and TypeScript inference.
Skill Claude CodeCodex
Hono testing patterns - app.request(), test client, mocking environment, and integration testing strategies.
Skill Claude CodeCodex
Hono request validation with Zod, TypeBox, Valibot - type-safe input validation for JSON, forms, query params, and headers.
Skill Claude CodeCodex
Next.js environment variable management with file precedence, variable types, and deployment configurations. Use when configuring Next.js applications, managing environment-specific settings, or deploying to Vercel/Railway/Heroku.
Skill Claude CodeCodex
Modern React 19 platform features and rendering architecture - the React Compiler (auto-memoization) and how it changes memoization guidance, concurrent rendering (useTransition/useDeferredValue/Suspense), the use() hook, Actions (useActionState/useOptimistic/useFormStatus), ref-as-prop and Context-as-provider…
Skill Claude CodeCodex
General React fundamentals - components and JSX, props and state, the core hooks (useState/useEffect/useRef/useMemo/useCallback/useContext), composition, conditional and list rendering, and controlled inputs. The canonical "depends on React" reference.
Skill Claude CodeCodex
Advanced React hooks composition patterns - SWR integration, debounced search, memoized contexts, state machines, and performance optimization.
Skill Claude CodeCodex
Building reusable React state machine skills with XState v5 and the actor model.
Skill Claude CodeCodex
Svelte 5 - Reactive UI framework with compiler magic, Runes API, SvelteKit full-stack framework, SSR/SSG, minimal JavaScript.
Skill Claude CodeCodex
Svelte 5 runes + SvelteKit adapter-static (SSG/SSR) patterns for hydration-safe state, store bridges, and reactivity that survives prerendering.
Skill Claude CodeCodex
SvelteKit - Full-stack Svelte framework with file-based routing, SSR/SSG, form actions, and adapters for deployment.
Skill Claude CodeCodex
Vue 3 - Progressive JavaScript framework with Composition API, reactivity system, single-file components, Vite integration, TypeScript support.
Skill Claude CodeCodex
Cypress end-to-end and component testing patterns for web apps: reliable selectors, stable waits, network stubbing, auth handling, CI parallelization, and flake reduction.
Skill Claude CodeCodex
Playwright modern end-to-end testing framework with cross-browser automation, auto-wait, and built-in test runner.