Nexus UI

An open-source component library for building AI-powered interfaces. Composable, copy-paste primitives for chat, streaming, and multimodal experiences — built on React, Tailwind CSS v4, and Radix UI.

Components are distributed via the shadcn registry and installed as source code into the user's project.

IMPORTANT: Run CLI commands using the project's package runner: npx shadcn@latest, pnpm dlx shadcn@latest, or bunx --bun shadcn@latest — based on the project's packageManager.

Installation

1. Add the registry

Add the Nexus UI registry to the project's components.json: