AsyncOnlyMiddleware Class — langchain Architecture

Architecture documentation for the AsyncOnlyMiddleware class in test_decorators.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  0d462738_2d0d_785b_02c8_32ff6be6361a["AsyncOnlyMiddleware"]
  949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e["AgentMiddleware"]
  0d462738_2d0d_785b_02c8_32ff6be6361a -->|extends| 949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e
  85a104a3_11cf_6539_d0c0_ba69a17a41d4["test_decorators.py"]
  0d462738_2d0d_785b_02c8_32ff6be6361a -->|defined in| 85a104a3_11cf_6539_d0c0_ba69a17a41d4
  77857a81_fd7b_1914_bf4f_19e4ec0f5136["aafter_model()"]
  0d462738_2d0d_785b_02c8_32ff6be6361a -->|method| 77857a81_fd7b_1914_bf4f_19e4ec0f5136

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_decorators.py lines 542–547

    class AsyncOnlyMiddleware(AgentMiddleware):
        @hook_config(can_jump_to=["model"])
        async def aafter_model(
            self, state: AgentState[Any], runtime: Runtime[None]
        ) -> dict[str, Any] | None:
            return None