claude-code-templates

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.

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.

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.

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".

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?"

Flutter accessibility — Semantics, TalkBack, VoiceOver, contrast, touch targets, screen readers. Use when user mentions accessibility, a11y, semantics, screen reader, TalkBack, VoiceOver, or touch targets.

Dart/Flutter code review — clean code, widget patterns, type safety, accessibility, performance. Use when user says "review code", "refactor", "check this PR", or before merging changes.

Flutter design patterns — Composition, Repository, MVVM, Strategy, Observer, Singleton, Factory. Use when user asks "implement pattern", "use composition", or when designing reusable features.

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.

Flutter performance — widget rebuilds, Impeller, app size, startup time, frame rate, DevTools. Use when user mentions performance, slow UI, jank, large APK, startup time, or "optimize".

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.

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.

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.

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?"

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".