Class SystemMessage

libs/core/langchain_core/messages/system.py:6–43

Message for priming AI behavior. The system message is usually passed in as the first of a sequence of input messages. Example: .. code-block:: python from langchain_core.messages import HumanMessage, SystemMessage messages = [ SystemM

class SystemMessage(BaseMessage):
    """Message for priming AI behavior.

    The system message is usually passed in as the first of a sequence
    of input messages.

    Example:

        .. code-block:: python

            from langchain_core.messages import HumanMessage, SystemMessage

            messages = [
                SystemMessage(
                    content="You are a helpful assistant! Your name is Bob."
                ),
                HumanMessage(
                    content="What is your name?"
                )
            ]

            # Define a chat model and invoke it with the messages
            print(model.invoke(messages))

    """

    type: Literal["system"] = "system"

    @classmethod
    def get_lc_namespace(cls) -> List[str]:
        """Get the namespace of the langchain object."""
        return ["langchain", "schema", "messages"]

    def __init__(
        self, content: Union[str, List[Union[str, Dict]]], **kwargs: Any
    ) -> None:
        """Pass in content as positional arg."""
        super().__init__(content=content, **kwargs)


SystemMessage.update_forward_refs()