langchain-ai/langgraph · error · LangGraphDeprecatedSinceV10

`config_schema` is deprecated and will be removed. Please us

Error message

`config_schema` is deprecated and will be removed. Please use `context_schema` instead.

What it means

Error "`config_schema` is deprecated and will be removed. Please use `context_schema` instead." thrown in langchain-ai/langgraph.

Source

Thrown at libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py:520

        def check_weather(location: str) -> str:
            '''Return the weather forecast for the specified location.'''
            return f"It's always sunny in {location}"

        graph = create_react_agent(
            "anthropic:claude-3-7-sonnet-latest",
            tools=[check_weather],
            prompt="You are a helpful assistant",
        )
        inputs = {"messages": [{"role": "user", "content": "what is the weather in sf"}]}
        for chunk in graph.stream(inputs, stream_mode="updates"):
            print(chunk)
        ```
    """
    if (
        config_schema := deprecated_kwargs.pop("config_schema", MISSING)
    ) is not MISSING:
        warnings.warn(
            "`config_schema` is deprecated and will be removed. Please use `context_schema` instead.",
            category=LangGraphDeprecatedSinceV10,
        )

        if context_schema is None:
            context_schema = config_schema

    if len(deprecated_kwargs) > 0:
        raise TypeError(
            f"create_react_agent() got unexpected keyword arguments: {deprecated_kwargs}"
        )

    if version not in ("v1", "v2"):
        raise ValueError(
            f"Invalid version {version}. Supported versions are 'v1' and 'v2'."
        )

    if state_schema is not None:

View on GitHub (pinned to 38031739e5)

When it happens

Trigger: Thrown at libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py:520 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of langchain-ai/langgraph@38031739e5 (2026-08-26). Data as JSON: /api/errors/5b8ee8d08046ff32. Report an issue: GitHub.