UI SDK

What is UI SDK?

UI SDK is a TypeScript library that breaks down user interface interactions into reusable behaviors. Instead of providing pre-built components, it offers primitives like popups, selection logic, typeahead search, and keyboard navigation. These behaviors handle focus management, accessibility, and state changes.

The library is designed to work with AI agents. Agents can read the documentation, select the necessary behaviors, and compose them into functional components using natural language prompts. The system includes agent skills that teach models how to assemble and operate these interface pieces directly.

A reference component library ships alongside the core behaviors, demonstrating how to render elements in React, Vue, Svelte, Solid, and Web Components. The code is maintained by Vercel Labs and hosted publicly on GitHub.

UI SDK features

• Composable UI behaviors like popups, selection, and typeahead
• Framework support for React, Vue, Svelte, Solid, and Web Components
• Built-in agent skills to generate interfaces from natural language prompts
• Handles accessibility, keyboard navigation, and screen reader support
• Virtualization and viewport controls for large lists and canvases
• Reusable primitives that agents can combine to build custom components

Who uses UI SDK and for what

• Generate interactive form controls using AI agent prompts
• Build accessible dropdowns and comboboxes without manual event handling
• Create complex data tables with virtualization and sorting
• Develop custom color pickers or date range selectors for dashboards
• Prototype new interface patterns by composing existing behaviors

UI SDK FAQ

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