UIX Components — AI Chat UI in 3 Lines

You are an expert in the UIX protocol and component library. UIX is an AI-to-UI Intermediate Representation (IR) protocol layer that bridges multiple AI protocols into a unified component system.

Core Concept

AI Agent Events (Vercel AI SDK / AG-UI / Anthropic / ...)
    ↓ adapter
UIX IR (LucidConversation[])
    ↓ render
React Components (AgentChat)

Quick Start — The 3-Line Pattern

The fastest way to build an AI chat UI:

With Vercel AI SDK

import { AgentChat } from '@uix-ai/agent'
import { useVercelChat } from '@uix-ai/adapter-vercel/react'

export default function Chat() {
  const { conversations, status, send, stop } = useVercelChat({ api: '/api/chat' })
  return <AgentChat conversations={conversations} status={status} onSend={send} onStop={stop} />
}

With AG-UI Protocol

import { AgentChat } from '@uix-ai/agent'
import { useAGUI } from '@uix-ai/adapter-agui/react'

export default function Chat() {
  const { conversations, status, send, stop } = useAGUI({ url: '/api/agent' })
  return <AgentChat conversations={conversations} status={status} onSend={send} onStop={stop} />
}

Without Any Adapter (Manual IR)

import { AgentChat } from '@uix-ai/agent'
import type { LucidConversation } from '@uix-ai/core'

const conversations: LucidConversation[] = [
  { id: '1', role: 'user', status: 'completed', blocks: [{ id: 'b1', type: 'text', status: 'completed', content: { text: 'Hello' } }] },
  { id: '2', role: 'assistant', status: 'completed', blocks: [{ id: 'b2', type: 'text', status: 'completed', content: { text: 'Hi! How can I help?' } }] },
]

export default function Chat() {
  return <AgentChat conversations={conversations} onSend={(msg) => console.log(msg)} />
}

UIX IR Type System

LucidConversation

interface LucidConversation {
  id: string
  role: 'user' | 'assistant' | 'system'
  status: 'streaming' | 'completed' | 'error'
  blocks: LucidBlock[]
  agentName?: string
  agentAvatar?: string
  timestamp?: number
}

LucidBlock

interface LucidBlock {
  id: string
  type: 'text' | 'tool' | 'thinking' | 'image' | 'file' | 'error' | 'source'
  status: 'streaming' | 'completed' | 'error'
  content: TextBlockContent | ToolBlockContent | ThinkingBlockContent | ...
}

Block Types

Type Guards

import { isTextBlock, isToolBlock, isThinkingBlock, isStreaming, isCompleted } from '@uix-ai/core'

if (isTextBlock(block)) {
  // block.content is TextBlockContent
}
if (isStreaming(conversation)) {
  // show streaming indicator
}

AgentChat Props

interface AgentChatProps {
  // Required
  conversations: LucidConversation[]
  onSend: (message: string) => void

  // Optional - status & control
  status?: 'idle' | 'streaming' | 'error'
  onStop?: () => void
  onRetry?: (conversationId: string) => void

  // Optional - agent info
  agent?: { name: string; avatar?: string; description?: string }

  // Optional - tool approval
  onToolApprove?: (blockId: string) => void
  onToolDeny?: (blockId: string) => void

  // Optional - customization
  placeholder?: string
  emptyState?: React.ReactNode
  renderBlock?: (block: LucidBlock) => React.ReactNode | null
  showHeader?: boolean
  autoScroll?: boolean
}

Composable Components

When you need more control than AgentChat, use individual components:

Layout

Messages

Avatars

Input

Adapter Reference

Vercel AI SDK Adapter

// React hook (recommended)
import { useVercelChat } from '@uix-ai/adapter-vercel/react'
const { conversations, status, send, stop, setMessages } = useVercelChat({
  api: '/api/chat',
  // all useChat options supported
})

// Manual conversion
import { fromVercelMessages, toVercelMessages } from '@uix-ai/adapter-vercel'
const lucidConversations = fromVercelMessages(vercelMessages)
const vercelMessages = toVercelMessages(lucidConversations)

AG-UI Adapter

// React hook (recommended)
import { useAGUI } from '@uix-ai/adapter-agui/react'
const { conversations, status, send, stop, reset } = useAGUI({
  url: '/api/agent',
  threadId: 'optional-thread-id',
  headers: { Authorization: 'Bearer ...' },
})

// Manual event processing
import { AGUIEventProcessor } from '@uix-ai/adapter-agui'
const processor = new AGUIEventProcessor()
processor.process(event) // feed AG-UI events
const conversations = processor.getConversations()

A2UI Adapter (Experimental)

import { fromA2UIPayload, toA2UIPayload } from '@uix-ai/adapter-a2ui'

// Google A2UI → UIX IR
const conversation = fromA2UIPayload(a2uiPayload)

// UIX IR → Google A2UI
const payload = toA2UIPayload(conversation)

Common Patterns

Next.js App Router + Vercel AI SDK

// app/api/chat/route.ts
import { streamText } from 'ai'
import { anthropic } from '@ai-sdk/anthropic'

export async function POST(req: Request) {
  const { messages } = await req.json()
  const result = streamText({
    model: anthropic('claude-sonnet-4-20250514'),
    messages,
  })
  return result.toDataStreamResponse()
}

// app/page.tsx
'use client'
import { AgentChat } from '@uix-ai/agent'
import { useVercelChat } from '@uix-ai/adapter-vercel/react'

export default function Page() {
  const { conversations, status, send, stop } = useVercelChat({ api: '/api/chat' })
  return (
    <div className="h-screen">
      <AgentChat
        conversations={conversations}
        status={status}
        onSend={send}
        onStop={stop}
        agent={{ name: 'Claude', description: 'AI Assistant' }}
      />
    </div>
  )
}

Custom Block Rendering

<AgentChat
  conversations={conversations}
  onSend={send}
  renderBlock={(block) => {
    if (block.type === 'tool' && block.content.name === 'weather') {
      return <WeatherCard data={block.content.output} />
    }
    return null // fall back to default rendering
  }}
/>

Multiple Conversations (Sidebar + Chat)

import { ChatList, ChatWindow } from '@uix-ai/agent'

function App() {
  const [activeId, setActiveId] = useState<string>()
  return (
    <div className="flex h-screen">
      <ChatList conversations={allConversations} activeId={activeId} onSelect={setActiveId} />
      <ChatWindow conversation={activeConversation} onSend={send} />