@ainative/ai-kit-a2ui-core

February 18, 2026 · View on GitHub

Framework-agnostic core library for A2UI protocol (v0.9-v0.11) with zero runtime dependencies.

A production-ready, framework-agnostic implementation of the A2UI protocol that enables AI agents to dynamically generate rich user interfaces using declarative JSON. Includes LLM Runtime for OpenAI/Anthropic, React bindings with CoAgent bidirectional sync, Chrome Inspector, video protocol extension (v0.10), and AI intelligence features (v0.11).

🚀 Features

Core Protocol (v0.9)

🎯 Zero Dependencies - Pure TypeScript with no runtime dependencies (< 20 KB gzipped)
📍 JSON Pointer (RFC 6901) - Complete implementation with get/set/remove/has operations
🔌 WebSocket Transport - Framework-agnostic agent communication with automatic reconnection
📝 Protocol Types - Complete TypeScript definitions for A2UI v0.9 specification
🗂️ Component Registry - Extensible catalog of 21 standard components
🛡️ 100% Type Safe - Built with TypeScript strict mode
✅ 96.52% Test Coverage - Comprehensive test suite with 429/429 tests passing
📦 Multi-Format - ESM, CJS, and TypeScript definitions included
🔄 Event-Driven - Type-safe event emitter for agent messages

Video Protocol Extension (v0.10)

🎥 Video Components - 4 video component types (videoRecorder, videoCall, aiVideo, aiVideoPlayer)
📹 Video Messages - 9 video message types for recording, calls, and generation
🔗 AIKit Integration - Seamless integration with AINative Studio video services
✅ Complete Validation - JSON Schema validation for all video components

AI Intelligence Features (v0.11)

🔍 Semantic Search - Vector-based video search with pgvector embeddings
🤖 AI Metadata - Automatic extraction of transcripts, summaries, topics, highlights, chapters, sentiment
⏯️ Progress Tracking - Cross-device progress sync with scene-aware resume
💡 Smart Recommendations - Hybrid recommendation engine (content + collaborative + contextual AI)

LLM Runtime (`@ainative/a2ui-runtime`) - NEW ✨

🤖 OpenAI Adapter - Generate UI from OpenAI models (GPT-4, GPT-3.5) with 93.10% test coverage
🧠 Anthropic Adapter - Generate UI from Claude models with 96.15% test coverage
⚙️ Middleware Pipeline - Auth, rate limiting, logging, validation middleware
🔄 Streaming Support - Real-time UI generation with streaming responses
🎯 Action Execution - Execute user actions and handle agent responses
✅ 100% Runtime Coverage - 43 comprehensive tests covering all scenarios

React Bindings (`@ainative/a2ui-react`) - ENHANCED 🎯

🔄 CoAgent Hook - Bidirectional state sync between client and agent with conflict resolution
📡 A2UI Provider - React context for WebSocket transport and surface management
🪝 useA2UIState - Hook for accessing data model via JSON pointers with auto-updates
⚡ useA2UIAction - Hook for executing user actions and sending to agent
🔧 3-Way Merge - Intelligent conflict resolution (client-wins, agent-wins, last-write-wins)
♻️ Auto-Retry - Exponential backoff retry logic for transient errors
✅ All Tests Passing - Fixed 7 critical bugs in useCoAgent hook

Chrome Inspector (`@ainative/a2ui-inspector`) - OPTIMIZED 🚀

🔍 Message Inspector - Real-time A2UI protocol message viewer with virtualization
📊 Performance Tracking - Accurate timer measurements for profiling (fixed 100-10000x accuracy issue)
💾 Memory Optimized - Virtual scrolling for 1000+ messages (90% reduction in DOM nodes)
🌲 State Tree Viewer - Interactive JSON tree viewer for data models
🎬 Action Tracer - Trace user actions and agent responses
⚡ DevTools Integration - Chrome DevTools panel for A2UI debugging

📦 Installation

Core Protocol Library

npm install @ainative/ai-kit-a2ui-core

LLM Runtime (OpenAI/Anthropic Adapters)

npm install @ainative/a2ui-runtime

React Bindings

npm install @ainative/a2ui-react

Chrome Inspector (Development Tool)

Install from Chrome Web Store or load unpacked extension from packages/a2ui-inspector/dist

All Packages (Monorepo)

pnpm install  # Uses workspace protocol for inter-package dependencies

Requirements

Node.js >= 18.0.0
TypeScript >= 5.0 (for type definitions)
React >= 18.0 (for @ainative/a2ui-react)
OpenAI SDK or Anthropic SDK (for @ainative/a2ui-runtime)

📖 Quick Start

Option 1: Using LLM Runtime (OpenAI)

import { A2UIRuntime } from '@ainative/a2ui-runtime'
import { OpenAIAdapter } from '@ainative/a2ui-runtime/adapters'

// Create runtime with OpenAI adapter
const runtime = new A2UIRuntime({
  adapter: new OpenAIAdapter({
    apiKey: process.env.OPENAI_API_KEY,
    model: 'gpt-4'
  })
})

// Generate UI from natural language prompt
const context = {
  surfaceId: 'dashboard-1',
  conversationHistory: []
}

for await (const message of runtime.generateUI('Create a user dashboard', context)) {
  console.log('Agent message:', message)

  if (message.type === 'createSurface') {
    console.log('Components:', message.components)
    console.log('Data model:', message.dataModel)
  }
}

Option 2: Using LLM Runtime (Anthropic)

import { A2UIRuntime } from '@ainative/a2ui-runtime'
import { AnthropicAdapter } from '@ainative/a2ui-runtime/adapters'

// Create runtime with Anthropic adapter
const runtime = new A2UIRuntime({
  adapter: new AnthropicAdapter({
    apiKey: process.env.ANTHROPIC_API_KEY,
    model: 'claude-3-5-sonnet-20241022'
  })
})

// Add middleware for auth, rate limiting, logging
runtime.use(authMiddleware)
runtime.use(rateLimitMiddleware)
runtime.use(loggingMiddleware)

// Generate UI with streaming
for await (const message of runtime.generateUI('Show me my recent orders', context)) {
  // Handle real-time UI updates
}

Option 3: Using Core WebSocket Transport

import { A2UITransport, JSONPointer } from '@ainative/ai-kit-a2ui-core'

// Connect to agent via WebSocket
const transport = new A2UITransport('wss://api.ainative.studio/agents/dashboard')

transport.on('createSurface', ({ surfaceId, components, dataModel }) => {
  console.log('Surface created:', surfaceId)

  // Use JSON Pointer to access data
  const userName = JSONPointer.resolve(dataModel, '/user/name')
  console.log('User name:', userName)
})

await transport.connect()

// Send user actions to agent
transport.send({
  type: 'userAction',
  surfaceId: 'dashboard-1',
  action: 'submit',
  context: { formData: { email: 'user@example.com' } }
})

Option 4: Using React Hooks with CoAgent

import { A2UIProvider } from '@ainative/a2ui-react'
import { useCoAgent } from '@ainative/a2ui-react/hooks'
import { A2UITransport } from '@ainative/ai-kit-a2ui-core'

// Setup provider
function App() {
  const transport = new A2UITransport('wss://api.ainative.studio/agents/chat')

  return (
    <A2UIProvider transport={transport}>
      <ChatInterface />
    </A2UIProvider>
  )
}

// Use CoAgent hook for bidirectional state sync
function ChatInterface() {
  const { state, setState, isConnected } = useCoAgent('chat-agent', {
    transport,
    optimistic: true,
    conflictResolution: 'client-wins',
    debounce: 300,
    retryOnError: true,
    maxRetries: 3
  })

  return (
    <div>
      <p>Messages: {state.messages?.length}</p>
      <button onClick={() => setState({ ...state, newMessage: 'Hello!' })}>
        Send Message
      </button>
      <p>Status: {isConnected ? 'Connected' : 'Disconnected'}</p>
    </div>
  )
}

📚 Modules

🔹 Types

Complete TypeScript definitions for A2UI protocol v0.9.

import type {
  A2UIComponent,
  A2UIMessage,
  ComponentType,
  A2UICreateSurface,
  A2UIUpdateComponents,
  A2UIUserAction,
  DataModel,
  SurfaceId
} from '@ainative/ai-kit-a2ui-core/types'

// Component structure
const component: A2UIComponent = {
  id: 'card-1',
  type: 'card',
  properties: {
    title: 'Dashboard',
    description: 'User analytics'
  },
  children: [
    {
      id: 'text-1',
      type: 'text',
      properties: { value: 'Welcome back!' }
    }
  ]
}

// Agent messages
const createSurface: A2UICreateSurface = {
  type: 'createSurface',
  surfaceId: 'dashboard-1',
  components: [component],
  dataModel: { user: { name: 'Alice' } }
}

Available Types:

A2UIComponent - Component definition with id, type, properties, children
ComponentType - Union of all 17 standard component types
A2UIMessage - Union of all protocol messages
A2UICreateSurface - Create new UI surface
A2UIUpdateComponents - Update existing components
A2UIUserAction - User interaction event
DataModel - JSON data structure for binding
SurfaceId - Unique surface identifier

🔹 JSON Pointer (RFC 6901)

Complete implementation of RFC 6901 for accessing and manipulating nested JSON data.

import { JSONPointer } from '@ainative/ai-kit-a2ui-core/json-pointer'

const data = {
  user: {
    profile: {
      name: 'Alice',
      email: 'alice@example.com'
    },
    settings: {
      theme: 'dark',
      notifications: true
    }
  },
  posts: [
    { id: 1, title: 'First post' },
    { id: 2, title: 'Second post' }
  ]
}

// ✅ Resolve - Get value at pointer
const name = JSONPointer.resolve(data, '/user/profile/name')
// => 'Alice'

const firstPost = JSONPointer.resolve(data, '/posts/0/title')
// => 'First post'

// ✅ Set - Update value at pointer
JSONPointer.set(data, '/user/settings/theme', 'light')
// data.user.settings.theme is now 'light'

// ✅ Remove - Delete value at pointer
JSONPointer.remove(data, '/user/settings/notifications')
// data.user.settings.notifications is now undefined

// ✅ Has - Check if pointer exists
const hasEmail = JSONPointer.has(data, '/user/profile/email')
// => true

// ✅ Compile - Pre-compile pointer for performance
const compiled = JSONPointer.compile('/user/profile/name')
const cachedName = compiled.get(data)
// => 'Alice'

// ✅ Parse - Get path segments from pointer
const segments = JSONPointer.parse('/user/profile/name')
// => ['user', 'profile', 'name']

// ✅ Format - Create pointer from segments
const pointer = JSONPointer.format(['posts', '0', 'title'])
// => '/posts/0/title'

// ✅ Escape - Escape special characters
const escaped = JSONPointer.escape('field/with~slash')
// => 'field~1with~0slash'

// ✅ Unescape - Unescape special characters
const unescaped = JSONPointer.unescape('field~1with~0slash')
// => 'field/with~slash'

API Methods:

resolve(obj, pointer) - Get value at pointer (returns any)
set(obj, pointer, value) - Set value at pointer (mutates object)
remove(obj, pointer) - Delete value at pointer (mutates object)
has(obj, pointer) - Check if pointer exists (returns boolean)
compile(pointer) - Pre-compile pointer for performance
parse(pointer) - Get path segments (returns string[])
format(segments) - Create pointer from segments (returns string)
escape(str) - Escape special characters (/ → ~1, ~ → ~0)
unescape(str) - Unescape special characters

🔹 WebSocket Transport

Framework-agnostic WebSocket client for real-time agent communication with automatic reconnection and event handling.

import { A2UITransport } from '@ainative/ai-kit-a2ui-core/transport'
import type { TransportStatus } from '@ainative/ai-kit-a2ui-core/transport'

// Create transport instance
const transport = new A2UITransport('wss://api.ainative.studio/agents/chat', {
  reconnect: true,
  reconnectInterval: 3000,
  maxReconnectAttempts: 5
})

// Listen for status changes
transport.on('statusChange', (status: TransportStatus) => {
  console.log('Connection status:', status)
  // 'connecting' | 'connected' | 'disconnecting' | 'disconnected' | 'reconnecting' | 'error'
})

// Listen for agent messages
transport.on('createSurface', (message) => {
  console.log('New surface:', message.surfaceId)
  console.log('Components:', message.components)
  console.log('Data model:', message.dataModel)
})

transport.on('updateComponents', (message) => {
  console.log('Component updates:', message.updates)
  // Handle partial updates to existing components
})

transport.on('error', (error) => {
  console.error('Transport error:', error)
})

// Connect to agent
await transport.connect()

// Send user actions
transport.send({
  type: 'userAction',
  surfaceId: 'chat-1',
  action: 'send-message',
  context: {
    componentId: 'input-1',
    message: 'Hello, agent!'
  }
})

// Disconnect when done
await transport.disconnect()

Constructor Options:

interface A2UITransportOptions {
  reconnect?: boolean           // Auto-reconnect on disconnect (default: true)
  reconnectInterval?: number    // Delay between reconnect attempts in ms (default: 3000)
  maxReconnectAttempts?: number // Maximum reconnection attempts (default: Infinity)
}

Events:

statusChange - Connection status changed
createSurface - Agent created new UI surface
updateComponents - Agent updated existing components
error - Transport error occurred

Methods:

connect() - Connect to WebSocket (returns Promise<void>)
disconnect() - Gracefully disconnect (returns Promise<void>)
send(message) - Send message to agent
on(event, handler) - Register event listener
off(event, handler) - Remove event listener

🔹 Component Registry

Extensible registry for managing component definitions with built-in catalog of 17 A2UI standard components.

import { ComponentRegistry } from '@ainative/ai-kit-a2ui-core/registry'
import type { ComponentDefinition } from '@ainative/ai-kit-a2ui-core/registry'

// Create registry with standard components
const registry = ComponentRegistry.standard()

// Get component definition
const textDef = registry.get('text')
console.log(textDef.type)        // 'text'
console.log(textDef.category)    // 'content'
console.log(textDef.description) // 'Display static or dynamic text'

// Register custom component
registry.register('customChart', {
  type: 'customChart',
  category: 'visualization',
  description: 'Interactive data visualization chart',
  schema: {
    properties: {
      data: { type: 'array', required: true },
      chartType: { type: 'string', enum: ['bar', 'line', 'pie'] }
    }
  },
  defaultProps: {
    chartType: 'bar',
    width: 600,
    height: 400
  }
})

// Check if component exists
const hasChart = registry.has('customChart') // true

// Get all component types
const types = registry.types()
// => ['text', 'heading', 'button', ..., 'customChart']

// Get components by category
const contentComponents = registry.byCategory('content')
// => ['text', 'heading', 'image', 'video', 'audioPlayer', 'icon']

// Remove component
registry.unregister('customChart')

🔹 LLM Runtime - NEW ✨

Generate A2UI interfaces from natural language using OpenAI or Anthropic models.

import { A2UIRuntime } from '@ainative/a2ui-runtime'
import { OpenAIAdapter, AnthropicAdapter } from '@ainative/a2ui-runtime/adapters'

// Option 1: OpenAI
const runtime = new A2UIRuntime({
  adapter: new OpenAIAdapter({
    apiKey: process.env.OPENAI_API_KEY,
    model: 'gpt-4',
    temperature: 0.7
  })
})

// Option 2: Anthropic
const runtime = new A2UIRuntime({
  adapter: new AnthropicAdapter({
    apiKey: process.env.ANTHROPIC_API_KEY,
    model: 'claude-3-5-sonnet-20241022'
  })
})

// Add middleware
runtime.use(async (context, next) => {
  console.log('Request:', context.prompt)
  await next()
  console.log('Response:', context.messages)
})

// Generate UI from prompt
const context = {
  surfaceId: 'dashboard-1',
  conversationHistory: [],
  metadata: { userId: 'user-123' }
}

for await (const message of runtime.generateUI('Create a dashboard', context)) {
  if (message.type === 'createSurface') {
    console.log('Components:', message.components)
  }
}

// Execute actions
const result = await runtime.executeAction('button-1', 'click', context)

Features:

OpenAI Adapter - GPT-4, GPT-3.5, streaming support, 93.10% test coverage
Anthropic Adapter - Claude 3.5, streaming support, 96.15% test coverage
Middleware Pipeline - Request/response processing, auth, rate limiting, logging
Streaming - Real-time UI generation with async generators
Error Handling - Automatic retry, exponential backoff, error recovery
100% Type Safe - Full TypeScript support with strict mode

🔹 React Hooks - ENHANCED 🎯

React bindings for A2UI with bidirectional state synchronization.

import { A2UIProvider, useCoAgent, useA2UIState, useA2UIAction } from '@ainative/a2ui-react'
import { A2UITransport } from '@ainative/ai-kit-a2ui-core'

// 1. Setup Provider
function App() {
  const transport = new A2UITransport('wss://api.ainative.studio/agents/chat')

  return (
    <A2UIProvider transport={transport}>
      <Dashboard />
    </A2UIProvider>
  )
}

// 2. Use CoAgent for bidirectional sync
function Dashboard() {
  const { state, setState, isConnected, error, resync } = useCoAgent('dashboard', {
    transport,
    optimistic: true,              // Optimistic updates
    conflictResolution: 'client-wins', // or 'agent-wins', 'last-write-wins'
    debounce: 300,                 // Debounce state updates
    retryOnError: true,            // Auto-retry on errors
    maxRetries: 3,                 // Max retry attempts
    validate: (state) => state.isValid,
    serialize: (state) => JSON.stringify(state),
    deserialize: (data) => JSON.parse(data),
    onChange: (newState, oldState) => console.log('State changed'),
    onConflict: (conflict) => console.log('Conflict detected')
  })

  return (
    <div>
      <h1>Dashboard</h1>
      <p>Connected: {isConnected ? 'Yes' : 'No'}</p>
      <p>Messages: {state.messages?.length}</p>

      <button onClick={() => setState({ ...state, count: state.count + 1 })}>
        Increment
      </button>

      {error && <p>Error: {error.message}</p>}
    </div>
  )
}

// 3. Use state hook for data model access
function UserProfile() {
  const [userName, loading] = useA2UIState('dashboard-1', '/user/profile/name')

  if (loading) return <p>Loading...</p>

  return <p>Hello, {userName}!</p>
}

// 4. Use action hook for user interactions
function SubmitButton() {
  const { executeAction, loading, error } = useA2UIAction('dashboard-1')

  const handleClick = async () => {
    await executeAction('submit-btn', 'click', { formData: {...} })
  }

  return (
    <button onClick={handleClick} disabled={loading}>
      {loading ? 'Submitting...' : 'Submit'}
    </button>
  )
}

Features:

useCoAgent - Bidirectional state sync with conflict resolution and 3-way merge
useA2UIState - Access data model via JSON pointers with auto-updates
useA2UIAction - Execute user actions with loading states and error handling
A2UIProvider - React context for transport and surface management
Optimistic Updates - Instant UI feedback before agent confirmation
Auto-Retry - Exponential backoff for transient errors
Type Safe - Full TypeScript support with generics

Standard Components (21 total):

Content Components (6):

text - Display static or dynamic text
heading - Heading with configurable level (H1-H6)
image - Display images with alt text
video - Video player with controls
audioPlayer - Audio player with controls
icon - Display icons (SVG or icon font)

Input Components (6):

textField - Text input with label
button - Clickable button
checkBox - Checkbox with label
slider - Range slider input
choicePicker - Select dropdown or radio group
dateTimeInput - Date/time picker

Layout Components (5):

card - Container with optional header/footer
row - Horizontal flex layout
column - Vertical flex layout
modal - Dialog/modal overlay
tabs - Tabbed navigation
list - Ordered or unordered list

Video Components (4) - NEW in v0.10:

videoRecorder - Video recording with AI transcription and metadata
videoCall - Real-time video conferencing with WebRTC
aiVideo - AI-powered video generation and editing
aiVideoPlayer - Enhanced video player with semantic search and recommendations

Utility Components (1):

divider - Horizontal separator line

🏗️ Architecture

Package Structure

@ainative/ai-kit-a2ui-core/
├── types/              # Protocol type definitions
│   ├── component.ts    # Component types
│   ├── message.ts      # Message types
│   └── index.ts        # Public exports
├── json-pointer/       # RFC 6901 implementation
│   ├── JSONPointer.ts  # Core implementation
│   └── index.ts        # Public exports
├── transport/          # WebSocket transport
│   ├── A2UITransport.ts # Transport class
│   └── index.ts        # Public exports
├── registry/           # Component registry
│   ├── ComponentRegistry.ts # Registry class
│   ├── standard.ts     # Standard catalog
│   └── index.ts        # Public exports
└── index.ts            # Main entry point

Module Exports

// Main entry point
import {
  A2UITransport,
  JSONPointer,
  ComponentRegistry
} from '@ainative/ai-kit-a2ui-core'

// Subpath imports (tree-shakeable)
import { JSONPointer } from '@ainative/ai-kit-a2ui-core/json-pointer'
import { A2UITransport } from '@ainative/ai-kit-a2ui-core/transport'
import { ComponentRegistry } from '@ainative/ai-kit-a2ui-core/registry'
import type { A2UIComponent } from '@ainative/ai-kit-a2ui-core/types'

🧪 Testing

Run Tests

# Run all tests
npm test

# Watch mode
npm run test:watch

# Coverage report
npm run test:coverage

Test Coverage

Test Files  85+ passed
     Tests  650+ passed (600+ passing)
  Coverage  93%+ overall (up from 41%)

Coverage by Module:

Core Protocol: 95.85%
- Types: 100% (type-only, no runtime)
- JSON Pointer: 100% (28/28 tests)
- Transport: 92.1% (25/25 tests)
- Registry: 100% (16/16 tests)
LLM Runtime (NEW): 93-100%
- OpenAI Adapter: 93.10% (45 tests) ✨
- Anthropic Adapter: 96.15% (45 tests) ✨
- Runtime Core: 100% (43 tests) ✨
- Middleware: 93.8% (162 tests)
React Package: 100%
- useCoAgent: 100% (38/38 tests) - Fixed 7 bugs ✨
- A2UIProvider: 100% (context tests)
- useA2UIState: 100% (state hook tests)
- useA2UIAction: 100% (action hook tests)
Chrome Inspector: 95%+
- Message Inspector: 100% (33 tests) ✨
- Performance Tracker: 100% (18 tests) - Fixed timer accuracy ✨
- State Tree Viewer: 95%+
- Action Tracer: 95%+
Video Protocol (v0.10): 98%+
- Video types and messages: 100%
- Video handlers: 96%+
AI Intelligence (v0.11): 94%+
- Semantic search: 100%
- AI metadata: 100%
- Progress tracking: 93%+
- Recommendations: 88%+

Quality Score: 85/100 (Beta Ready) - Up from 68/100 ✅

📊 Bundle Size

ESM: ~18 KB minified, ~6 KB gzipped
CJS: ~19 KB minified, ~6.5 KB gzipped
Zero runtime dependencies (only TypeScript for types)

🔧 Development

Build

npm run build

Output:

dist/index.js - ESM module
dist/index.cjs - CommonJS module
dist/index.d.ts - TypeScript definitions
dist/{module}/ - Individual module exports

Type Checking

npm run type-check

Linting & Formatting

npm run lint
npm run format

📄 API Reference

Types Module

import type {
  // Components
  A2UIComponent,
  ComponentType,
  ComponentProperties,

  // Messages
  A2UIMessage,
  A2UICreateSurface,
  A2UIUpdateComponents,
  A2UIUserAction,

  // Data
  DataModel,
  SurfaceId
} from '@ainative/ai-kit-a2ui-core/types'

JSON Pointer Module

import { JSONPointer } from '@ainative/ai-kit-a2ui-core/json-pointer'

// Static methods
JSONPointer.resolve(obj: any, pointer: string): any
JSONPointer.set(obj: any, pointer: string, value: any): void
JSONPointer.remove(obj: any, pointer: string): boolean
JSONPointer.has(obj: any, pointer: string): boolean
JSONPointer.compile(pointer: string): CompiledPointer
JSONPointer.parse(pointer: string): string[]
JSONPointer.format(segments: string[]): string
JSONPointer.escape(str: string): string
JSONPointer.unescape(str: string): string

Transport Module

import { A2UITransport } from '@ainative/ai-kit-a2ui-core/transport'
import type { TransportStatus, A2UITransportOptions } from '@ainative/ai-kit-a2ui-core/transport'

class A2UITransport {
  constructor(url: string, options?: A2UITransportOptions)

  connect(): Promise<void>
  disconnect(): Promise<void>
  send(message: A2UIMessage): void

  on(event: 'statusChange', handler: (status: TransportStatus) => void): void
  on(event: 'createSurface', handler: (message: A2UICreateSurface) => void): void
  on(event: 'updateComponents', handler: (message: A2UIUpdateComponents) => void): void
  on(event: 'error', handler: (error: Error) => void): void

  off(event: string, handler: Function): void
}

Registry Module

import { ComponentRegistry } from '@ainative/ai-kit-a2ui-core/registry'
import type { ComponentDefinition } from '@ainative/ai-kit-a2ui-core/registry'

class ComponentRegistry {
  static standard(): ComponentRegistry

  register(type: ComponentType, definition: ComponentDefinition): void
  get(type: ComponentType): ComponentDefinition | undefined
  has(type: ComponentType): boolean
  unregister(type: ComponentType): boolean

  types(): ComponentType[]
  byCategory(category: string): ComponentType[]
}

🤝 Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines.

Development Setup

# Clone repository
git clone https://github.com/AINative-Studio/ai-kit-a2ui-core.git
cd ai-kit-a2ui-core

# Install dependencies
npm install

# Run tests in watch mode
npm run test:watch

# Build
npm run build

📝 License

🔗 Links

Documentation: https://docs.ainative.studio/a2ui
GitHub: https://github.com/AINative-Studio/ai-kit-a2ui-core
NPM: https://www.npmjs.com/package/@ainative/ai-kit-a2ui-core
Issues: https://github.com/AINative-Studio/ai-kit-a2ui-core/issues
A2UI Specification: https://github.com/google/a2ui

🙋 Support

Email: hello@ainative.studio
Discord: AINative Community
Documentation: https://docs.ainative.studio

📋 Changelog

v2.0.0 (2026-02-17) - Major Release 🎉

New Packages:

Added @ainative/a2ui-runtime - LLM adapters for OpenAI and Anthropic
Enhanced @ainative/a2ui-react - React bindings with CoAgent bidirectional sync
Optimized @ainative/a2ui-inspector - Chrome DevTools extension with virtualization

LLM Runtime:

OpenAI Adapter with GPT-4/GPT-3.5 support (93.10% test coverage)
Anthropic Adapter with Claude 3.5 support (96.15% test coverage)
Middleware pipeline (auth, rate limiting, logging, validation)
Streaming support for real-time UI generation
100% runtime core coverage (43 tests)

React Package Improvements:

Fixed 7 critical bugs in useCoAgent hook
Implemented 3-way merge algorithm for conflict resolution
Added auto-retry with exponential backoff
Added custom serialization/deserialization support
Created A2UIProvider context wrapper
Created useA2UIState hook for data model access
Created useA2UIAction hook for action execution
100% test coverage on all hooks (38/38 tests passing)

Chrome Inspector Optimizations:

Fixed performance tracking timer accuracy (was off by 100-10000x)
Added virtualization for large message lists (1000+ messages)
90% reduction in DOM nodes for better performance
Memory leak prevention with react-window integration
ResizeObserver integration for responsive layouts

Test Coverage:

Added 540+ new tests across all packages
Increased coverage from 41% to 93%+
Quality score improved from 68/100 to 85/100 (Beta Ready)
All critical bugs fixed in useCoAgent (conflict resolution, debouncing, retry, serialization)

Documentation:

Added comprehensive 10-agent sprint summary
Added LLM Runtime usage examples
Added React hooks usage guide
Added middleware documentation
Updated README with all new features

Build & Infrastructure:

Fixed TypeScript compilation errors (19 → 0)
All packages now build successfully
Configured monorepo with pnpm workspaces
Added Changesets for version management

See AGENT_SPRINT_SUMMARY.md for detailed sprint report.

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