Interface representing a message in the outline system. Used to structure messages stored in the outline history, typically for user, assistant, or system interactions.
role: "user" | "assistant" | "system"
The role of the message sender, either user, assistant, or system. Determines the context or source of the message in the outline history.
content: string
The content of the message. Contains the raw text or param of the message, used in history storage or processing.