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---
name: frontend-code
description: Frontend architecture, UI/UX implementation, and web performance
---
# Frontend Code Skill
This skill specializes in browser-based development including HTML, CSS, React, Vue, Angular, etc.
## When to use this skill
- When building responsive, accessible user interfaces.
- When managing client-side state and routing.
- When addressing Core Web Vitals (LCP, FID, CLS).
## Guidelines
- Assume a mobile-first philosophy for responsive design.
- Semantic HTML is critical for Accessibility (a11y) and SEO. Avoid using generic `div` elements when native elements apply.
- Minimize main-thread blocking JavaScript to maintain 60 FPS interactions.
- Scope CSS to components (CSS Modules, CSS-in-JS, Shadow DOM) to avoid global style leaking.
