before_model() — langchain Function Reference

Architecture documentation for the before_model() function in test_framework.py from the langchain codebase.

Function python LangChainCore LanguageModelBase calls 1 called by 1

Entity Profile

LangChainCore→ LanguageModelBase→ before_model() — langchain Function Reference

Dependency Diagram

graph TD
  8d3bffd7_818e_92df_028f_7ddeaca51628["before_model()"]
  8c574d58_1f4a_c56d_49f8_177cce7f7bcc["MyMiddleware"]
  8d3bffd7_818e_92df_028f_7ddeaca51628 -->|defined in| 8c574d58_1f4a_c56d_49f8_177cce7f7bcc
  8eb23e9c_37a8_6540_bfd3_b42a64a7cbee["before_model()"]
  8eb23e9c_37a8_6540_bfd3_b42a64a7cbee -->|calls| 8d3bffd7_818e_92df_028f_7ddeaca51628
  8eb23e9c_37a8_6540_bfd3_b42a64a7cbee["before_model()"]
  8d3bffd7_818e_92df_028f_7ddeaca51628 -->|calls| 8eb23e9c_37a8_6540_bfd3_b42a64a7cbee
  style 8d3bffd7_818e_92df_028f_7ddeaca51628 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_framework.py lines 468–470

        def before_model(self, state: AgentState[Any], runtime: Runtime) -> dict[str, Any]:
            assert "jump_to" not in state
            return {"jump_to": "model"}