What problem does it solve? Modern frontend development spans multiple frameworks, rendering models, and state management approaches, making it hard to apply the correct pattern consistently. This Skill provides structured guidance for React 19, Next.js 16, and Vue 3.5 so components, server actions, and composables follow current best practices. ## Core Features & Use Cases - Framework Patterns: Covers React 19 server components and cache(), Next.js 16 App Router and Server Actions, and Vue 3.5 Composition API with Pinia. - Component Architecture: Guides design tokens, CVA variants, compound components, and accessibility requirements. - Performance & Verification: Addresses code splitting, memoization, bundle size checks, and Playwright-based visual verification. - Use Case: When building a Next.js page that fetches data, use this Skill to structure an async server component with Suspense boundaries and a validated Server Action using zod. ## Quick Start Ask the AI to create a React 19 server component with Suspense loading states and a CVA-based button variant for your project.