A tool from Vercel that adds before-and-after screenshots to your PRs. Compare any two URLs side-by-side, capture specific page elements with CSS selectors, and generate visual diffs across mobile, tablet, and custom viewport sizes. Supports interactive before-and-after viewers, markdown table output, full-page scrollable capture, and custom image upload handlers.
npx skills add vercel-labs/before-and-afterwget https://github.com/vercel-labs/before-and-after/archive/refs/heads/main.zip -O before-and-after.zipManages shadcn components and projects — adding, searching, fixing, debugging, styling, and composing UI.
Comprehensive guide for building modern, accessible, and composable UI components with design tokens, theming, and npm publishing.
Component library built on shadcn/ui to create AI-native applications with pre-built components like conversations, messages, and more.
Comprehensive performance optimization guide for Postgres covering query optimization, schema design, connection pooling, and RLS.