assistant-ui Thread List

Always consult assistant-ui.com/llms.txt for latest API.

Manage multiple chat threads with built-in or custom UI.

References

• ./references/management.md — Thread CRUD operations
• ./references/custom-ui.md — Custom thread list UI

Quick Start

Thread list is available with useChatRuntime + cloud:

import { AssistantCloud } from "assistant-cloud";
import { useChatRuntime, AssistantChatTransport } from "@assistant-ui/react-ai-sdk";
import { AssistantRuntimeProvider, Thread, ThreadList } from "@assistant-ui/react";

const cloud = new AssistantCloud({
  baseUrl: process.env.NEXT_PUBLIC_ASSISTANT_BASE_URL,
  authToken: async () => getAuthToken(),
});

function Chat() {
  const runtime = useChatRuntime({
    transport: new AssistantChatTransport({ api: "/api/chat" }),
    cloud,
  });

  return (
    <AssistantRuntimeProvider runtime={runtime}>
      <div className="flex h-screen">
        <ThreadList className="w-64 border-r" />
        <Thread className="flex-1" />
      </div>
    </AssistantRuntimeProvider>
  );
}

Thread Operations

import { useAssistantApi, useAssistantState } from "@assistant-ui/react";

const api = useAssistantApi();
const { threads, mainThreadId } = useAssistantState(s => s.threadList);

// Switch to thread
api.threads().switchToThread(threadId);

// Create new thread
api.threads().switchToNewThread();

// Thread item operations
const item = api.threads().item({ id: threadId });
await item.rename("New Title");
await item.archive();
await item.delete();

Custom Thread List

import { ThreadListPrimitive, ThreadListItemPrimitive } from "@assistant-ui/react";

function CustomThreadList() {
  return (
    <ThreadListPrimitive.Root className="w-64">
      <ThreadListPrimitive.New className="w-full p-2 bg-blue-500 text-white">
        + New Chat
      </ThreadListPrimitive.New>

      <ThreadListPrimitive.Items>
        <ThreadListItemPrimitive.Root className="flex p-2 hover:bg-gray-100">
          <ThreadListItemPrimitive.Trigger className="flex-1">
            <ThreadListItemPrimitive.Title />
          </ThreadListItemPrimitive.Trigger>
          <ThreadListItemPrimitive.Archive>Archive</ThreadListItemPrimitive.Archive>
          <ThreadListItemPrimitive.Delete>Delete</ThreadListItemPrimitive.Delete>
        </ThreadListItemPrimitive.Root>
      </ThreadListPrimitive.Items>
    </ThreadListPrimitive.Root>
  );
}

Without Cloud (Local)

import { useRemoteThreadListRuntime, InMemoryThreadListAdapter } from "@assistant-ui/react";

const runtime = useRemoteThreadListRuntime({
  adapter: new InMemoryThreadListAdapter(),
  runtimeHook: () => useLocalRuntime({ model: myModel }),
});

Common Gotchas

ThreadList not showing

• Pass cloud to runtime
• Check authentication

Threads not persisting

• Verify cloud connection
• Check network requests