import { Logger } from '@nestjs/common';
import { ConversationThread, FetchHistoryOptions, IConversationHistoryProvider } from './conversation-history.interface';
import { IntelligentCompressionService } from '../services/intelligent-compression.service';
export declare abstract class BaseConversationHistoryProvider implements IConversationHistoryProvider {
    protected readonly logger: Logger;
    protected compressionService?: IntelligentCompressionService;
    constructor(loggerContext: string, compressionService?: IntelligentCompressionService);
    abstract fetchHistory(threadId: string, options?: FetchHistoryOptions): Promise<ConversationThread>;
    abstract hasHistory(threadId: string): Promise<boolean>;
    formatForAI(thread: ConversationThread, options?: FetchHistoryOptions): Promise<string>;
    protected sanitizeMessage(text: string): string;
}