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ExtraMessagesMiddleware Class — langchain Architecture

Architecture documentation for the ExtraMessagesMiddleware class in test_wrap_model_call_state_update.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  b14b9edc_907b_5998_e77e_1c6daa9cb06c["ExtraMessagesMiddleware"]
  949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e["AgentMiddleware"]
  b14b9edc_907b_5998_e77e_1c6daa9cb06c -->|extends| 949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e
  08361e76_a995_1e57_f200_e292474e2f00["test_wrap_model_call_state_update.py"]
  b14b9edc_907b_5998_e77e_1c6daa9cb06c -->|defined in| 08361e76_a995_1e57_f200_e292474e2f00
  2d5fc484_0802_8f57_ddca_3c9bcf82e0d5["wrap_model_call()"]
  b14b9edc_907b_5998_e77e_1c6daa9cb06c -->|method| 2d5fc484_0802_8f57_ddca_3c9bcf82e0d5

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call_state_update.py lines 60–71

        class ExtraMessagesMiddleware(AgentMiddleware):
            def wrap_model_call(
                self,
                request: ModelRequest,
                handler: Callable[[ModelRequest], ModelResponse],
            ) -> ExtendedModelResponse:
                response = handler(request)
                summary = HumanMessage(content="Summary", id="summary")
                return ExtendedModelResponse(
                    model_response=response,
                    command=Command(update={"messages": [summary]}),
                )

Defined In

Extends

Source

Frequently Asked Questions

What is the ExtraMessagesMiddleware class?
ExtraMessagesMiddleware is a class in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call_state_update.py.
Where is ExtraMessagesMiddleware defined?
ExtraMessagesMiddleware is defined in libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call_state_update.py at line 60.
What does ExtraMessagesMiddleware extend?
ExtraMessagesMiddleware extends AgentMiddleware.

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