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assistant-ui/assistant-ui

assistant-ui 的概述與路由器，這是一個基於可組合原語建構 AI 聊天介面的 React 函式庫。適用於高層級、跨領域或架構概覽的問題：選擇套件、挑選執行環境，或理解分層模型（RuntimeCore、Runtime、Context 鉤子、原語）與訊息模型。

assistant-ui 是什麼？

assistant-ui/assistant-ui 是 assistant-ui React 函式庫的頂層路由器與概述技能。assistant-ui 提供一組可組合的原語，讓開發者能輕鬆建構自訂的 AI 聊天介面。此技能專為回答高層級、跨領域或架構概覽問題而設計，例如選擇正確的套件（`@assistant-ui/react` 核心、`@assistant-ui/react-ai-sdk`、`@assistant-ui/react-langgraph`、`assistant-stream`、`assistant-cloud`）、挑選執行環境（如 `useChatRuntime`、`useLangGraphRuntime`），或理解其分層模型（RuntimeCore、Runtime、React Context 鉤子、UI 原語）。它也涵蓋了核心元件，如 `AssistantRuntimeProvider`、`ThreadPrimitive`、`MessagePrimitive`、`ComposerPrimitive` 以及 `useAui`、`useAuiState`、`useAuiEvent` 等鉤子。對於更深度的具體實作任務（例如設定、執行環境、原語、工具、串流、雲端、執行緒列表或更新），此技能會將使用者引導至專注的兄弟技能，確保架構概覽與實作細節之間有明確的分工。

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npx skills add https://github.com/assistant-ui/skills/tree/main/skills/assistant-ui
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assistant-ui 是做什麼的？

assistant-ui 的概述與路由器，這是一個基於可組合原語建構 AI 聊天介面的 React 函式庫。適用於高層級、跨領域或架構概覽的問題：選擇套件、挑選執行環境，或理解分層模型（RuntimeCore、Runtime、Context 鉤子、原語）與訊息模型。涵蓋 @assistant-ui/react 核心，以及 @assistant-ui/react-ai-sdk、@assistant-ui/react-langgraph、assistant-stream 和 assistant-cloud；AssistantRuntimeProvider；原語 ThreadPrimitive、MessagePrimitive、ComposerPrimitive；鉤子 useAui、useAuiState、useAuiEvent；以及跨 useChatRuntime、useExternalStoreRuntime、useLangGraphRuntime、useLocalRuntime 的執行環境選擇。對於特定領域的問題，請轉向專注的兄弟技能：設定、執行環境、原語、工具、串流、雲端、執行緒列表或更新。不適用於已由上述兄弟技能負責的實際操作任務。

Individual skills in this repo

This repo contains 7 individual skills — each has its own dedicated page.

assistant-ui/primitives

Builds and customizes assistant-ui chat UI from composable, unstyled @assistant-ui/react primitives that follow Radix-style part composition. Use when assembling or styling a custom Thread, Composer, message rendering, action bar, or branch picker from building blocks: ThreadPrimitive (.Root, .Viewport, .Messages, .Empty, .ScrollToBottom), ComposerPrimitive (.Input, .Send, .Cancel, .Attachments), MessagePrimitive (.Parts/.Content, .Error), ActionBarPrimitive (.Copy, .Edit, .Reload, .Speak, feedback, .ExportMarkdown), BranchPickerPrimitive, AttachmentPrimitive, ThreadListPrimitive, ThreadListItemPrimitive. Covers MessagePrimitive.Parts children render functions for text, image, reasoning, and tool-call parts; conditional rendering with AuiIf (deprecated .If); and gotchas like wrapping in AssistantRuntimeProvider and adding className since primitives ship unstyled. For prebuilt drop-in UI and scaffolding use setup; for multi-thread sidebar behavior use thread-list.

assistant-ui/runtime

Guide for assistant-ui runtime system and state management. Use when working with runtimes, accessing state, or managing thread/message data.

assistant-ui/setup

Installs and configures assistant-ui in a project via the CLI, and picks the right runtime for a backend. Use for first-time install, scaffold, or config: `npx assistant-ui@latest create my-app` (templates default, minimal, cloud, cloud-clerk, langgraph, mcp), `npx assistant-ui@latest init [--yes] [--overwrite]` in an existing Next.js app, or `npx assistant-ui@latest add` registry components (markdown-text, thread-list). Also use to choose a runtime hook for a backend: useChatRuntime (AI SDK), useLangGraphRuntime, useAgUiRuntime, useA2ARuntime, useLocalRuntime (custom streaming API), or useExternalStoreRuntime (Redux/Zustand). Covers Vite/TanStack Start setup, shadcn styling, the playground --preset flag, and avoiding the deprecated @assistant-ui/styles and @assistant-ui/react-ui packages. For upgrading an existing install or post-upgrade breakage use update; for building UI from raw parts use primitives.

assistant-ui/streaming

Streaming backends and wire protocols for assistant-ui via the assistant-stream package. Use when building a custom (non-AI-SDK) streaming endpoint with createAssistantStreamResponse or createAssistantStreamController, emitting parts through appendText/appendReasoning/appendSource/appendFile/addToolCallPart and setResponse; choosing between the AI SDK Data Stream format (toUIMessageStreamResponse) and the native Assistant Transport format; encoding or decoding streams with DataStreamEncoder/DataStreamDecoder, AssistantTransportEncoder/AssistantTransportDecoder, PlainTextEncoder, or UIMessageStreamDecoder; or wiring streamed chunks into useLocalRuntime or useChatRuntime. Use specifically for debugging stream wire issues: text-delta, part-start, result events, text/event-stream content-type, SSE format, tool calls not rendering, or partial text not showing. For general non-stream debugging route to the relevant focused skill, not the parent overview.

assistant-ui/thread-list

Implements multi-thread (conversation history) management in assistant-ui apps: rendering the prebuilt `ThreadList` next to `Thread`, or building a custom sidebar with `ThreadListPrimitive` and `ThreadListItemPrimitive` (Root, New, Items, Trigger, Title, Archive, Unarchive, Delete). Covers thread CRUD through the `useAui()`/`useAuiState()` API: `switchToThread`, `switchToNewThread`, and per item `rename`, `archive`, `unarchive`, `delete`, `generateTitle`, `initialize`, plus reading `s.threads.threadIds`/`archivedThreadIds`/`mainThreadId`. Includes cloud-backed persistence via `useChatRuntime` + `AssistantCloud` and a local `useRemoteThreadListRuntime` + `InMemoryThreadListAdapter` path. Use when a user wants a thread list/sidebar, switching, searching, sorting, drag-and-drop, or renaming/archiving/deleting conversations. For single-thread state, messages, or composer use runtime; for cloud auth/persistence setup use cloud.

assistant-ui/tools

Registers LLM tools and renders custom tool-call UI in assistant-ui (@assistant-ui/react). Use when adding frontend-only tools with makeAssistantTool / useAssistantTool (browser actions like clipboard, navigation, localStorage, async-generator streaming, AbortSignal), rendering backend AI SDK tool() calls with makeAssistantToolUI / useAssistantToolUI (status.type running/complete/incomplete/requires-action, args, result, artifact via ToolCallMessagePartProps), building generative UI from tool results, or implementing human-in-the-loop and approval flows (addResult, resume with context.human(), respondToApproval for server-side needsApproval gates). Covers registering tool components inside AssistantRuntimeProvider and the case-sensitive toolName matching that connects a tool to its UI. Reach for this when tool UI is not rendering, a tool is not being called, or a result is not showing.

assistant-ui/update

Upgrades an existing assistant-ui project to current releases and executes the resulting migrations. Use when the user wants to update, upgrade, bump, or migrate @assistant-ui/react, @assistant-ui/react-ai-sdk, ai, or @ai-sdk/react, hits peer-dependency conflicts or post-upgrade type errors, or must apply renamed APIs after a version jump. Detects installed versus latest versions via npm ls / npm view, then routes through breaking-change references for each jump (AI SDK v4/v5 to v6; assistant-ui 0.8.x to 0.14.x): useAssistantApi to useAui, runtime.threadList to runtime.threads, ThreadPrimitive.ViewportSlack removal, the primitives components prop to children render functions, toDataStreamResponse to toUIMessageStreamResponse, maxSteps to stopWhen: stepCountIs(n). Runs npx assistant-ui@latest upgrade, pnpm/npm add @latest, and npx tsc --noEmit to verify. For a first-time install or fresh scaffold (not an upgrade) use setup instead.

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