import { ConversationThread, ConversationMessage } from './conversation-history.interface';
export declare class ConversationStorageService {
    private readonly logger;
    private readonly storageDir;
    constructor();
    initialize(): Promise<void>;
    saveThread(thread: ConversationThread): Promise<void>;
    loadThread(threadId: string): Promise<ConversationThread | null>;
    addMessage(threadId: string, message: ConversationMessage, platform?: 'slack' | 'cli'): Promise<ConversationThread>;
    listThreads(): Promise<string[]>;
    deleteThread(threadId: string): Promise<void>;
    hasThread(threadId: string): Promise<boolean>;
    private getThreadPath;
    cleanupOldThreads(daysToKeep?: number): Promise<number>;
}