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AddMessagesMiddleware Class — langchain Architecture

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

Class python

Entity Profile

Dependency Diagram

graph TD
  cf1b869d_82e8_0ce7_a07d_c6a863176221["AddMessagesMiddleware"]
  949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e["AgentMiddleware"]
  cf1b869d_82e8_0ce7_a07d_c6a863176221 -->|extends| 949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e
  08361e76_a995_1e57_f200_e292474e2f00["test_wrap_model_call_state_update.py"]
  cf1b869d_82e8_0ce7_a07d_c6a863176221 -->|defined in| 08361e76_a995_1e57_f200_e292474e2f00
  d396c46f_9578_f666_e962_5c87880557ee["wrap_model_call()"]
  cf1b869d_82e8_0ce7_a07d_c6a863176221 -->|method| d396c46f_9578_f666_e962_5c87880557ee

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call_state_update.py lines 32–43

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

Defined In

Extends

Source

Frequently Asked Questions

What is the AddMessagesMiddleware class?
AddMessagesMiddleware 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 AddMessagesMiddleware defined?
AddMessagesMiddleware is defined in libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call_state_update.py at line 32.
What does AddMessagesMiddleware extend?
AddMessagesMiddleware extends AgentMiddleware.

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