/**
 * Message Constants
 */
export declare const MESSAGE_ROLES: {
    readonly SYSTEM: "system";
    readonly USER: "user";
    readonly ASSISTANT: "assistant";
};
export declare const PART_TYPES: {
    readonly TEXT: "text";
    readonly TOOL: "tool";
    readonly REASONING: "reasoning";
    readonly IMAGE: "image";
    readonly TOOL_USE: "tool_use";
};
