export interface DirectoryKnowledge {
    directory: string;
    contributors: {
        email: string;
        commits: number;
        percentage: number;
    }[];
    totalCommits: number;
    busFactor: number;
}
export interface KnowledgeMapOptions {
    depth?: number;
    since?: string;
    until?: string;
    maxCommits?: number;
    pathPattern?: string;
    timeoutMs?: number;
}
/**
 * Analyze knowledge ownership per directory and compute bus factor.
 *
 * Bus factor = minimum number of contributors whose cumulative
 * contribution exceeds 50% of total commits for that directory.
 */
export declare function analyzeKnowledgeMap(repoPath: string, options?: KnowledgeMapOptions): Promise<DirectoryKnowledge[]>;
/**
 * Extract directory at the given depth from a file path.
 * depth=1: "src/tools/foo.ts" -> "src"
 * depth=2: "src/tools/foo.ts" -> "src/tools"
 * If path has fewer segments, returns the dirname portion.
 */
export declare function getDirectoryAtDepth(filePath: string, depth: number): string;
/**
 * Compute bus factor: minimum number of contributors whose cumulative
 * contribution exceeds 50% of total commits.
 * Assumes counts are sorted descending.
 */
export declare function computeBusFactor(sortedCounts: number[], total: number): number;