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MismatchedResponseMiddleware Class — langchain Architecture

Architecture documentation for the MismatchedResponseMiddleware class in test_middleware_type_errors.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  e745092e_2ad2_de1d_0ec1_5a0c55ea23d7["MismatchedResponseMiddleware"]
  47e0e3d7_cac1_0ec3_228a_0fd46437bc22["test_middleware_type_errors.py"]
  e745092e_2ad2_de1d_0ec1_5a0c55ea23d7 -->|defined in| 47e0e3d7_cac1_0ec3_228a_0fd46437bc22
  c76afac4_ca12_bb13_76d8_73e570e7706a["wrap_model_call()"]
  e745092e_2ad2_de1d_0ec1_5a0c55ea23d7 -->|method| c76afac4_ca12_bb13_76d8_73e570e7706a

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_type_errors.py lines 154–164

class MismatchedResponseMiddleware(
    AgentMiddleware[AgentState[AnalysisResult], ContextT, AnalysisResult]
):
    def wrap_model_call(  # type: ignore[override]
        self,
        request: ModelRequest[ContextT],
        # TYPE ERROR: Handler should return ModelResponse[AnalysisResult], not SummaryResult
        handler: Callable[[ModelRequest[ContextT]], ModelResponse[SummaryResult]],
    ) -> ModelResponse[AnalysisResult]:
        # This would fail at runtime - types don't match
        return handler(request)  # type: ignore[return-value]

Defined In

Source

Frequently Asked Questions

What is the MismatchedResponseMiddleware class?
MismatchedResponseMiddleware is a class in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_type_errors.py.
Where is MismatchedResponseMiddleware defined?
MismatchedResponseMiddleware is defined in libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_type_errors.py at line 154.

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