export declare class CommitCache {
    private readonly cacheDir;
    private cachedHashes;
    constructor();
    /**
     * Get cache file path for a source.
     *
     * Phase 2 Update: Changed from repo name to sourceId for multi-source support.
     * sourceId is a UUID and is filesystem-safe, so no sanitization needed.
     *
     * Note: This is a breaking change for cache format but acceptable since
     * the cache rebuilds automatically on first extract with the new format.
     * Old repo-name cache files will be ignored.
     *
     * @param sourceId - UUID of the Source record
     * @returns Path to cache file for this source
     */
    private getCachePath;
    /**
     * Initialize cache directory if it doesn't exist
     */
    init(): Promise<void>;
    /**
     * Add commit hashes to cache for a source.
     *
     * Phase 2 Update: Changed from repoName to sourceId for multi-source support.
     *
     * @param sourceId - UUID of the Source record
     * @param commitHashes - Array of commit hash strings to cache
     * @throws Error if cache write fails
     */
    add(sourceId: string, commitHashes: string[]): Promise<void>;
    /**
     * Check if a commit hash exists in cache for a source.
     *
     * Phase 2 Update: Changed from repoName to sourceId for multi-source support.
     *
     * @param sourceId - UUID of the Source record
     * @param commitHash - Commit hash to check
     * @returns true if commit is cached, false otherwise
     */
    has(sourceId: string, commitHash: string): Promise<boolean>;
    /**
     * List all cached commit hashes for a source.
     *
     * Phase 2 Update: Changed from repoName to sourceId for multi-source support.
     *
     * @param sourceId - UUID of the Source record
     * @returns Array of commit hashes in cache for this source
     */
    list(sourceId: string): Promise<string[]>;
    /**
     * Clear cache for a specific source or all sources.
     *
     * Phase 2 Update: Changed from repoName to sourceId for multi-source support.
     *
     * @param sourceId - UUID of the Source record to clear, or undefined to clear all
     * @throws Error if cache clearing fails
     */
    clear(sourceId?: string): Promise<void>;
    /**
     * Get statistics about the cache.
     *
     * Phase 2 Update: Changed from repoName to sourceId for multi-source support.
     *
     * @param sourceId - UUID of specific source, or undefined for all sources
     * @returns Statistics about cached commits
     */
    getStats(sourceId?: string): Promise<{
        sources: number;
        commits: number;
        sourceStats?: {
            [key: string]: number;
        };
    }>;
}
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