Cult UI – Shadcn UI Components, Blocks & Templates
Open-source Shadcn UI components, animated blocks, and full templates you can copy-paste into any TypeScript/Next.js project.
UI Component Library
Summary
Vercel Labs' UI SDK is a framework-agnostic library of UI behaviors (keyboard nav, focus, selection, popups, drag-and-drop) with ARIA support, designed specifically for AI agents to build accessible interfaces. Ships with adapters for React, Vue, Svelte, Solid, and Web Components.
Highlights
- Framework-agnostic core with adapters for React, Vue, Svelte, Solid, and Web Components
- Designed for AI agents: includes a skill system (npx skills add) so agents can learn to build UIs with it
- Components defined as behaviors using definePrimitive with state, api, and slots, rendered via createParts
- Bundles keyboard navigation, focus management, selection, dismissal, popups, and drag-and-drop with ARIA
- Currently in beta; the createParts API produces identical rendering code across all five frameworks
auto-generated
Context
Audience
Frontend developers and AI agent builders looking for accessible, framework-agnostic UI primitives
DomainFrontend UI Engineering
Formatopen source library with documentation
Accessopen source on GitHub, npm install
Source Overview
UI SDK is a Vercel Labs library providing keyboard navigation, focus, selection, dismissal, popup, and drag-and-drop behaviors with ARIA support.
It ships a core package plus adapters for React, Vue, Svelte, Solid, and Web Components. The project is in beta, with components defined as behaviors and rendered through a createParts API.
Topics
Related
ARIA accessibility patternsWeb ComponentsAI agent toolingHeadless UI librariesVercel Labs
