/**
 * Git Knowledge Layer - Load knowledge from Git repositories
 * Supports authentication, branch selection, and caching
 */
import { BaseKnowledgeLayer } from './base-layer.js';
import { AtomicTopic } from '../types/bc-knowledge.js';
import { LayerLoadResult, ConfigGitLayerSource, AuthConfiguration } from '../types/index.js';
export declare class GitKnowledgeLayer extends BaseKnowledgeLayer {
    private readonly gitConfig;
    private readonly auth?;
    private readonly cacheDir;
    private git;
    private localPath;
    private lastUpdated?;
    constructor(name: string, priority: number, gitConfig: ConfigGitLayerSource, auth?: AuthConfiguration, cacheDir?: string);
    initialize(): Promise<LayerLoadResult>;
    private ensureCacheDirectory;
    private setupGitWithAuth;
    private configureAuthentication;
    private ensureRepository;
    private prepareUrlWithAuth;
    private checkoutBranch;
    private loadFromDirectory;
    private loadTopicsFromDirectory;
    private getRelativePath;
    private getCurrentCommitHash;
    private getRepositorySize;
    private generateUrlHash;
    refresh(): Promise<boolean>;
    protected loadTopics(): Promise<number>;
    protected loadIndexes(): Promise<number>;
    /**
     * Load a single atomic topic from a markdown file
     */
    private loadAtomicTopic;
    /**
     * Normalize topic ID from file path
     */
    protected normalizeTopicId(filePath: string, basePath?: string): string;
    /**
     * Validate topic structure
     */
    protected validateTopic(topic: AtomicTopic): boolean;
    getSourceInfo(): {
        type: "git";
        url: string;
        branch: string;
        subpath: string;
        localPath: string;
        lastUpdated: Date;
        hasAuth: boolean;
    };
}
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