What problem does it solve? Manually auditing front-end code for design consistency, accessibility, and UX best practices is slow and error-prone. This Skill automates the review of UI code against the official Vercel Web Interface Guidelines, producing concise file:line findings with fix suggestions. ## Core Features & Use Cases - Design Compliance Audit: Checks spacing scale (8px baseline grid), typography scale, color tokens, elevation hierarchy, border radius, and icon sizing consistency. - Accessibility (A11y) Checks: Verifies color contrast ratios, visible focus states, alt text, semantic HTML, ARIA labels, form label associations, tab order, and prefers-reduced-motion support. - UX Best Practice Review: Validates hover/active states, loading skeletons, empty and error states, 44x44px touch targets, pointer cursors, and content-jump prevention. - Use Case: During a code review of a React pull request, run this Skill on the changed component files to get a terse list of design and accessibility violations with exact line references before merging. ## Quick Start Ask the AI to review the specified UI files or glob pattern against the Vercel Web Interface Guidelines and list all design, accessibility, and UX issues.