Project templates for Claude Code — Next.js, Spring Boot, and Flutter, each with preconfigured agents, skills, rules, and hooks
Skill Claude CodeCodex
WCAG 2.2 accessibility patterns — semantic HTML, ARIA, keyboard navigation, focus management, screen readers, and color contrast. Use when user mentions accessibility, a11y, WCAG, ARIA, screen reader, keyboard navigation, or focus management.
Skill Claude CodeCodex
Comprehensive frontend code review for TypeScript 6 and React 19.2 — clean code principles, component patterns, type safety, accessibility, and performance. Use when user says "review code", "refactor", "check this PR", or before merging changes.
Skill Claude CodeCodex
Frontend design patterns with React 19.2 and TypeScript 6 examples (Composition, Compound Components, Custom Hooks, Render Props, HOC, State Machines). Use when user asks "implement pattern", "use composition", or when designing reusable components.
Skill Claude CodeCodex
Frontend performance patterns for Core Web Vitals (LCP, INP, CLS), Turbopack optimization, bundle splitting, Cache Components strategy, and rendering performance. Use when user mentions performance, slow loading, large bundle, Core Web Vitals, or "optimize".
Skill Claude CodeCodex
React 19.2 + Next.js 16 development - Server Components, Cache Components, proxy.ts, View Transitions, App Router, TypeScript 6, and Tailwind CSS v4. Use when building frontend apps, creating components, or asking "how do I set up X?".
Skill Claude CodeCodex
Activated when building Flutter apps, creating widgets, implementing state management, setting up navigation, configuring themes, writing tests, or asking "how do I set up X" in a Flutter/Dart context. Covers UI, Riverpod, GoRouter, Dio, Freezed, Drift, Material 3 theming, testing, and Clean Architecture patterns.
Skill Claude CodeCodex
REST API design patterns — resource modeling, HTTP methods, status codes, pagination, RFC 9457 errors, OpenAPI documentation, versioning. Use when user asks about API design, endpoints, error handling, or documentation.
Skill Claude CodeCodex
Data access patterns with Spring Data JPA, Hibernate 7.1, Flyway migrations, HikariCP tuning, N+1 prevention, caching, and query optimization. Use when user mentions database, JPA, queries, migrations, N+1, or slow queries.
Skill Claude CodeCodex
Backend observability patterns — structured logging, Micrometer metrics, OpenTelemetry tracing, Spring Boot Actuator, Kubernetes health probes, alerting, and dashboards. Use when user mentions logging, metrics, tracing, monitoring, health checks, or Prometheus.
Skill Claude CodeCodex
Spring Boot 4.0 + Java 25 development - auto-configuration, starters, Actuator, profiles, externalized config, security, and production patterns. Use when building backend apps, creating endpoints, configuring Spring, or asking "how do I set up X?".
Skill Claude CodeCodex
Backend testing patterns with JUnit 6, Mockito 6, Testcontainers 2.0, Spring Boot slice tests, RestTestClient, and security testing. Use when user mentions testing, coverage, TDD, integration tests, or "write tests for".