asSystem

Message for priming AI behavior. The system message is usually passed in as the first of a sequence of input messages. Example:

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))