SyncOnlyMiddleware Class — langchain Architecture

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

Class python

Entity Profile

Dependency Diagram

graph TD
  2a673bc4_c812_4e9d_63e5_01bca33ef5cf["SyncOnlyMiddleware"]
  949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e["AgentMiddleware"]
  2a673bc4_c812_4e9d_63e5_01bca33ef5cf -->|extends| 949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e
  85a104a3_11cf_6539_d0c0_ba69a17a41d4["test_decorators.py"]
  2a673bc4_c812_4e9d_63e5_01bca33ef5cf -->|defined in| 85a104a3_11cf_6539_d0c0_ba69a17a41d4
  28fa7487_7074_9d90_d3ef_bb64640336d2["before_model()"]
  2a673bc4_c812_4e9d_63e5_01bca33ef5cf -->|method| 28fa7487_7074_9d90_d3ef_bb64640336d2

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_decorators.py lines 528–533

    class SyncOnlyMiddleware(AgentMiddleware):
        @hook_config(can_jump_to=["end"])
        def before_model(
            self, state: AgentState[Any], runtime: Runtime[None]
        ) -> dict[str, Any] | None:
            return None