Agent skill · design visual · am-will
Frontend Responsive Design Standards
Build responsive, mobile-first layouts using fluid containers, flexible units, media queries, and touch-friendly design that works across all screen sizes. Use this skill when creating or modifying UI layouts, responsive grids, breakpoint styles, mobile navigation, or any interface that needs to adapt to different screen sizes. Apply when working with responsive CSS, media queries, viewport settings, flexbox/grid layouts, mobile-first styling, breakpoint definitions (mobile, tablet, desktop), touch target sizing, relative units (rem, em, %), image optimization for different screens, or testing layouts across multiple devices. Use for any task involving multi-device support, responsive design patterns, or adaptive layouts.
Why this skill is useful
Provides specific responsive design patterns and standards that the AI wouldn't reliably generate on its own.
What it needs
About 6k tokens when loaded. Last updated 2026-07-14. 1,014 stars on the source repository.
What this skill does
Frontend Responsive Design Standards Rule: Mobile-first development with consistent breakpoints, fluid layouts, relative units, and touch-friendly targets. When to use this skill When creating or modifying layouts that need to work on mobile, tablet, and desktop When implementing mobile-first design patterns starting with mobile layout When writing media queries or breakpoint-specific styles When using flexible units (rem, em, %) instead of fixed pixels for scalability When implementing fluid layouts with percentage-based widths or flexbox/grid When ensuring touch targets meet minimum size requirements (44x44px) for mobile When optimizing images and assets for different screen sizes and mobile networks When testing UI across multiple device sizes and breakpoints When maintaining readable typography across all screen sizes When prioritizing content display on smaller screens through layout decisions When using responsive design utilities in CSS frameworks (Tailwind, Bootstrap responsive classes) This Skill provides Codex with specific guidance on how to adhere to coding standards as they relate to how it should handle frontend responsive. Mobile-First Development - Mandatory Always start with mobile layout, then enhance for larger screens. Bad (desktop-first): Good (mobile-first): Why mobile-first: Forces content prioritization Better performance on mobile (no overriding) Progressive enhancement over graceful degradation Standard Breakpoints Identify and use project breakpoints consistently: Common breakpoint systems: Tailwind: Bootstrap: Check existing codebase for breakpoint definitions before creating new ones. Usage (Tailwind): Usage (CSS): Never use arbitrary breakpoints like 850px or 1150px unless explicitly required. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills am-will/frontend-responsive-ui