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assistant-ui/streaming

Streaming-Backends und Wire-Protokolle für assistant-ui über das assistant-stream-Paket. Verwenden Sie dies beim Erstellen eines benutzerdefinierten (nicht AI-SDK) Streaming-Endpunkts mit createAssistantStreamResponse oder createAssistantStreamController.

Was ist streaming?

Dieses Skill konzentriert sich auf die Streaming-Aspekte von assistant-ui über das assistant-stream-Paket. Es ist speziell für Entwickler gedacht, die benutzerdefinierte Streaming-Endpunkte außerhalb des AI SDK erstellen müssen, indem sie die Funktionen createAssistantStreamResponse oder createAssistantStreamController verwenden. Der Skill detailliert, wie man Teile wie Text, Reasoning, Quellen, Dateien und Tool-Aufrufe mit Methoden wie appendText, appendReasoning, appendSource, appendFile, addToolCallPart und setResponse ausgibt. Er unterstützt sowohl das AI SDK Data Stream Format (toUIMessageStreamResponse) als auch das native Assistant Transport Format. Darüber hinaus bietet er Encoder und Decoder für verschiedene Stream-Formate (DataStreamEncoder/DataStreamDecoder, AssistantTransportEncoder/AssistantTransportDecoder, PlainTextEncoder, UIMessageStreamDecoder) und zeigt, wie gestreamte Chunks in useLocalRuntime oder useChatRuntime integriert werden. Er ist besonders nützlich für die Fehlersuche bei Wire-Problemen wie fehlenden Tool-Aufrufen, unvollständigem Text oder Problemen mit dem SSE-Format.

Funktioniert mit~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/assistant-ui/skills/tree/main/skills/streaming

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Dokumentation

Was macht streaming?

Streaming-Backends und Wire-Protokolle für assistant-ui über das assistant-stream-Paket. Verwenden Sie dies beim Erstellen eines benutzerdefinierten (nicht AI-SDK) Streaming-Endpunkts mit createAssistantStreamResponse oder createAssistantStreamController, wobei Teile durch appendText/appendReasoning/appendSource/appendFile/addToolCallPart und setResponse ausgegeben werden; wählen Sie zwischen dem AI SDK Data Stream Format (toUIMessageStreamResponse) und dem nativen Assistant Transport Format; codieren oder decodieren Sie Streams mit DataStreamEncoder/DataStreamDecoder, AssistantTransportEncoder/AssistantTransportDecoder, PlainTextEncoder oder UIMessageStreamDecoder; oder verbinden Sie gestreamte Chunks mit useLocalRuntime oder useChatRuntime. Verwenden Sie dies speziell für die Fehlersuche bei Stream-Wire-Problemen: text-delta, part-start, result events, text/event-stream content-type, SSE-Format, Tool-Aufrufe, die nicht gerendert werden, oder teilweiser Text, der nicht angezeigt wird. Für allgemeine Nicht-Stream-Fehlerbehebung leiten Sie zum entsprechenden fokussierten Skill weiter, nicht zur übergeordneten Übersicht.

Individual skills in this repo

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

assistant-ui/assistant-ui

Overview and router for assistant-ui, the React library for building AI chat interfaces from composable primitives. Use for high-level, cross-cutting, or architecture-overview questions: choosing packages, picking a runtime, or understanding the layered model (RuntimeCore, Runtime, context hooks, primitives) and message model. Covers the `@assistant-ui/react` core plus `@assistant-ui/react-ai-sdk`, `@assistant-ui/react-langgraph`, `assistant-stream`, and `assistant-cloud`; `AssistantRuntimeProvider`; the primitives `ThreadPrimitive`, `MessagePrimitive`, `ComposerPrimitive`; the hooks `useAui`, `useAuiState`, `useAuiEvent`; and runtime selection across `useChatRuntime`, `useExternalStoreRuntime`, `useLangGraphRuntime`, `useLocalRuntime`. For a specific area route to a focused sibling instead: setup, runtime, primitives, tools, streaming, cloud, thread-list, or update. Not for hands-on tasks already owned by those siblings.

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/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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