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Guide for assistant-ui library - AI chat UI components. Use when asking about architecture, debugging, or understanding the codebase.
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Production-ready CSS transitions for web apps. Use when implementing notification badges, dropdowns, modals, panel reveals, page transitions, card resizes, number pop-ins, text swaps, icon swaps, success checks, avatar group hovers, error state shakes, search/input clear, skeleton loaders, shimmer text, sliding tabs, tooltips, staggered text reveals, card hover tilt, plus-to-menu morph, or accordions. Triggers on "add a transition", "animate the dropdown", "make the modal open smoothly", "swap icon", "page slide", "stagger animation", "open / close transition", "make it animate", "fade between", "success animation", "form error", "shake on invalid", "hover lift", "avatar stack hover", "clear the search", "skeleton loader", "loading shimmer", "shimmer text", "sliding tabs", "segmented control", "tooltip", "reveal text", "tilt card", "3D hover tilt", "cursor glare", "plus to menu", "FAB morph", "accordion", "collapsible", "expand / collapse", "disclosure", "replace this transition", "which transition fits here"
AGH visual-design authority for production UI, static artifacts, prototypes, and reviews. Use when creating or reviewing an AGH surface or changing tokens, typography, spacing, depth, icons, or motion. Do not use for capture-only verification; use agh-ui-screenshot.
Screenshot capture for deterministic PNG evidence and visual-contract bundles for AGH Storybook stories and local UI URLs. Use for visual audits, regression diffs, and design-parity checks. Do not use for interactive E2E flows, remote authenticated sites, or Storybook test execution.
Enforces fresh verification evidence before any completion, fix, or passing claim, and before commits or PR creation. Use when an agent is about to report success, hand off work, or commit code. Do not use for early planning, brainstorming, or tasks that have not yet reached a concrete verification step.
Deep review of branch diffs, working trees, or GitHub PRs at any size. Use when the user asks for CodeRabbit-grade review, an incremental re-review after new pushes, publication of findings to a PR, a cross-LLM peer-review verdict round, or conformance review against spec artifacts. Don't use for applying fixes, reviewing specs or PRDs as documents, or quick single-file feedback.
AGH runtime and contribution guide. Use for sessions, agents, native tools, skills, memory, network, tasks, capabilities, bundles, QA, docs, and repo work. Do not use for unrelated projects.
| name | assistant-ui |
| description | Guide for assistant-ui library - AI chat UI components. Use when asking about architecture, debugging, or understanding the codebase. |
| version | 0.0.1 |
| license | MIT |
Always consult assistant-ui.com/llms.txt for latest API.
React library for building AI chat interfaces with composable primitives.
| Use Case | Best For |
|---|---|
| Chat UI from scratch | Full control over UX |
| Existing AI backend | Connects to any streaming backend |
| Custom message types | Tools, images, files, custom parts |
| Multi-thread apps | Built-in thread list management |
| Production apps | Cloud persistence, auth, analytics |
┌─────────────────────────────────────────────────────────┐
│ UI Components (Primitives) │
│ ThreadPrimitive, MessagePrimitive, ComposerPrimitive │
└─────────────────────────┬───────────────────────────────┘
│
┌─────────────────────────▼───────────────────────────────┐
│ Context Hooks │
│ useAui, useAuiState, useAuiEvent │
└─────────────────────────┬───────────────────────────────┘
│
┌─────────────────────────▼───────────────────────────────┐
│ Runtime Layer │
│ AssistantRuntime → ThreadRuntime → MessageRuntime │
└─────────────────────────┬───────────────────────────────┘
│
┌─────────────────────────▼───────────────────────────────┐
│ Adapters/Backend │
│ AI SDK · LangGraph · Custom · Cloud Persistence │
└─────────────────────────────────────────────────────────┘
Using AI SDK?
├─ Yes → useChatRuntime (recommended)
└─ No
├─ External state (Redux/Zustand)? → useExternalStoreRuntime
├─ LangGraph agent? → useLangGraphRuntime
├─ AG-UI protocol? → useAgUiRuntime
├─ A2A protocol? → useA2ARuntime
└─ Custom API → useLocalRuntime
| Package | Purpose |
|---|---|
@assistant-ui/react | UI primitives & hooks |
@assistant-ui/react-ai-sdk | Vercel AI SDK v6 adapter |
@assistant-ui/react-langgraph | LangGraph adapter |
@assistant-ui/react-markdown | Markdown rendering |
assistant-stream | Streaming protocol |
assistant-cloud | Cloud persistence |
import { AssistantRuntimeProvider } from "@assistant-ui/react";
import { Thread } from "@/components/assistant-ui/thread";
import { useChatRuntime, AssistantChatTransport } from "@assistant-ui/react-ai-sdk";
function App() {
const runtime = useChatRuntime({
transport: new AssistantChatTransport({ api: "/api/chat" }),
});
return (
<AssistantRuntimeProvider runtime={runtime}>
<Thread />
</AssistantRuntimeProvider>
);
}
import { useAui, useAuiState } from "@assistant-ui/react";
const api = useAui();
api.thread().append({ role: "user", content: [{ type: "text", text: "Hi" }] });
api.thread().cancelRun();
const messages = useAuiState(s => s.thread.messages);
const isRunning = useAuiState(s => s.thread.isRunning);
/setup - Installation and configuration/primitives - UI component customization/runtime - State management deep dive/tools - Tool registration and UI/streaming - Streaming protocols/cloud - Persistence and auth/thread-list - Multi-thread management/update - Version updates and migrations