victorcodess/nexus-ui

Nexus UI is a component library built specifically for developers creating AI-powered applications in React. The problem it solves is that general-purpose UI toolkits were not designed with AI chat interfaces in mind, so developers had to cobble together their own solutions for things like streaming text, voice input, file attachments, and conversation threads. Nexus UI provides ready-made building blocks for exactly those needs. The library includes components like PromptInput (a chat text box that resizes automatically), Thread (a scrolling conversation view that sticks to the latest message), Message (individual chat bubbles with avatars and markdown support), Citation (inline source references with hover previews), and Reasoning (a collapsible panel showing an AI's step-by-step thinking). There is also a ModelSelector dropdown for switching between AI models and a TextShimmer effect to indicate when the AI is generating a response. It is designed to integrate with the Vercel AI SDK and ElevenLabs voice services. The components follow the same copy-paste philosophy as shadcn/ui, meaning you add them to your project as source code you own outright rather than importing an external package at runtime. A developer building a chatbot interface, an AI assistant with document uploads, or any streaming conversational UI would reach for this library. The tech stack is TypeScript, React 19, Tailwind CSS v4, Radix UI primitives, and Next.js.