export type SessionTaskPlanItemStatus = 'pending' | 'in_progress' | 'completed' | 'cancelled';
export type SessionTaskPlanItem = {
    id: string;
    content: string;
    status: SessionTaskPlanItemStatus;
};
export type SessionTaskPlan = {
    sessionId: string;
    planId: string;
    items: SessionTaskPlanItem[];
    revision: number;
    updatedAt: number;
};
export declare function getSessionTaskPlan(sessionKey: string, planId?: string): SessionTaskPlan | undefined;
export declare function setSessionTaskPlan(input: {
    sessionKey: string;
    planId?: string;
    items: SessionTaskPlanItem[];
    now?: number;
}): SessionTaskPlan | undefined;