OpenUI
10890

API Reference

Reference for every OpenUI package, grouped by what it does.

Where to start

Core

@openuidev/lang-core

Framework-agnostic parser, prompt generation, and runtime for OpenUI Lang. Docs on GitHub.

Renderers

@openuidev/react-lang

Define component libraries, generate prompts, and render streamed OpenUI Lang in React.

@openuidev/vue-lang

Vue 3 bindings to define components and render streamed OpenUI Lang.

@openuidev/svelte-lang

Svelte 5 bindings to define components and render streamed OpenUI Lang.

@openuidev/angular-lang

Angular bindings to define components and render streamed OpenUI Lang.

Chat

@openuidev/react-headless

Chat state, thread hooks, and stream adapters, with no UI.

@openuidev/react-ui

AgentInterface, a ready-made chat surface with thread history.

Agent integrations

@openuidev/assistant-ui

OpenUI tool renderers and model instructions for assistant-ui apps.

@openuidev/langchain

Relay LangChain and LangGraph agent streams to an OpenUI frontend.

@openuidev/a2ui

A2UI v1.0 client that uses OpenUI Lang for component payloads.

Server

@openuidev/server

Autofix and conversation history for OpenUI Gateway.

Component libraries

@openuidev/react-email

Email components and prompt options for model-generated emails.

Tooling

@openuidev/cli

Scaffold apps, generate prompts and library specs, and deploy.

@openuidev/devtools

Development-only widget that shows captured errors and stack traces.

@openuidev/browser-bundle

Script-tag bundle for CDN, iframe, and no-build embeds. Docs on GitHub.

@openuidev/react-lang

API reference for the OpenUI Lang runtime, library, parser, and renderer.

On this page

Where to startCoreRenderersChatAgent integrationsServerComponent librariesTooling