import type { CrawlOptions } from './doc-crawler.js';
export interface CheckpointData {
    config: CrawlOptions;
    visitedUrls: string[];
    pendingUrls: Array<{
        url: string;
        depth: number;
    }>;
    pagesCrawled: number;
    lastUpdated: string;
    baseUrl: string;
}
/**
 * Manager for crawl checkpoint/resume functionality
 * Based on Skill_Seekers implementation
 */
export declare class CheckpointManager {
    private checkpointFile;
    constructor(checkpointFile: string);
    /**
     * Save checkpoint data to file
     */
    saveCheckpoint(data: CheckpointData): Promise<void>;
    /**
     * Load checkpoint data from file
     * Returns null if file doesn't exist or is invalid
     */
    loadCheckpoint(): Promise<CheckpointData | null>;
    /**
     * Clear checkpoint file
     */
    clearCheckpoint(): Promise<void>;
    /**
     * Check if checkpoint exists
     */
    exists(): Promise<boolean>;
}
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