LangChain Demo

Demonstrates three LangChain/LangGraph integration patterns with kokage-ui's AgentView.

Run

pip install kokage-ui[langchain]
uvicorn examples.langchain_demo:app --reload

Open http://localhost:8000 in your browser.

Pages

Path	Adapter	Description
/	langchain_stream	Converts LangChain astream_events v2 to AgentEvent
/langgraph	langgraph_stream	Converts LangGraph astream (messages mode) to AgentEvent
/callback	LangChainCallbackHandler	Callback-based adapter for legacy AgentExecutor

ToolRegistry

The demo defines tools with ToolRegistry — a decorator-based registry that works standalone and can be converted to LangChain tools via to_langchain_tools().

from kokage_ui.ai import ToolRegistry

registry = ToolRegistry()

@registry.tool
async def search(query: str, limit: int = 3) -> str:
    """Search the knowledge base."""
    ...

Source

::: examples.langchain_demo