shadcn/ui is a collection of accessible, customizable React components built on Radix UI and Tailwind CSS. Components are copied into your project (no npm package); you own and edit the code. Works with Next.js (App Router), Vite, and other React frameworks.
Principles: Open code (AI-ready), composable API, beautiful defaults, distribution via CLI and schema. Requires Tailwind v4 and path alias @/. We do not use tailwind.config.js; theme and setup are CSS-only (@import "tailwindcss" + @theme).
Choose framework (Next.js, Vite, etc.), style (new-york recommended), base color, and CSS variables. Then add components as needed.
Install and use shadcn/ui with Tailwind v4 and Next.js (App Router), Vite, or manual setup; configure components.json, add components via CLI, theming with CSS only. Use when adding shadcn/ui, installing shadcn, using Button, Card, Dialog, Form, or other shadcn components, or when the user mentions shadcn, shadcn/ui, or Radix UI with Tailwind. Source: enderpuentes/ai-agent-skills.