AgentStep Class — langchain Architecture

Architecture documentation for the AgentStep class in agents.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  49303d68_8203_8fe7_7ed7_cdd4d346ba09["AgentStep"]
  f3658565_d05c_7f49_b7f8_622b7ef34f33["Serializable"]
  49303d68_8203_8fe7_7ed7_cdd4d346ba09 -->|extends| f3658565_d05c_7f49_b7f8_622b7ef34f33
  81828515_0fcd_6cb4_96b8_62d4fca3e4ff["agents.py"]
  49303d68_8203_8fe7_7ed7_cdd4d346ba09 -->|defined in| 81828515_0fcd_6cb4_96b8_62d4fca3e4ff
  a2344a29_310c_4291_2dbb_16e6df48d673["messages()"]
  49303d68_8203_8fe7_7ed7_cdd4d346ba09 -->|method| a2344a29_310c_4291_2dbb_16e6df48d673

Relationship Graph

Source Code

libs/core/langchain_core/agents.py lines 131–143

class AgentStep(Serializable):
    """Result of running an `AgentAction`."""

    action: AgentAction
    """The `AgentAction` that was executed."""

    observation: Any
    """The result of the `AgentAction`."""

    @property
    def messages(self) -> Sequence[BaseMessage]:
        """Messages that correspond to this observation."""
        return _convert_agent_observation_to_messages(self.action, self.observation)