LangChain & LangGraph

Integration overview

How it connects to OpenUI

The @openuidev/langchain package transforms LangGraph protocol-v2 events into AG-UI on the server, then agUIAdapter() consumes the stream in AgentInterface. If your backend already returns native LangGraph named-event SSE, use the bundled langGraphAdapter() and langGraphMessageFormat instead.

The integration path

1. 1

   Describe the interface

   Generate a component prompt from the same OpenUI library that will render the response.

2. 2

   Stream structured output

   Let LangChain & LangGraph own its part of the stack while OpenUI Lang travels as incremental text or mapped agent events.

3. 3

   Render and interact

   Parse the stream with the matching OpenUI runtime, render real components, and return validated actions to the application.

What stays consistent