type MessageLike = {
    role?: string;
    content?: string;
    info?: {
        role?: string;
    };
    parts?: Array<{
        type: string;
        text?: string;
    }>;
};
export declare function buildSessionSummary(messages: MessageLike[]): string;
export declare function createSessionCompactionHook(ctx: {
    client: Pick<import("../shared/types").ExtendedClient, "session">;
}, internalSessions: Set<string>): (input: {
    sessionID: string;
}, output: {
    context: string[];
    prompt?: string;
}) => Promise<void>;
export {};