export interface SessionData {
    sessionId: string;
    startTime: Date;
    lastUpdated: Date;
    conversationHistory: Array<{
        role: string;
        content: string;
    }>;
    metadata?: Record<string, unknown>;
}
export declare class SessionPersistence {
    private sessionDir;
    constructor(sessionDir?: string);
    saveSession(sessionId: string, data: SessionData): Promise<void>;
    loadSession(sessionId: string): Promise<SessionData | null>;
    listSessions(): Promise<Array<{
        id: string;
        startTime: Date;
        lastUpdated: Date;
    }>>;
    deleteSession(sessionId: string): Promise<void>;
    exportSession(sessionId: string, outputPath?: string): Promise<string>;
    cleanOldSessions(daysToKeep?: number): Promise<number>;
}
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