export declare class ChangedFilesError extends Error {
    readonly kind: 'invalid_ref' | 'git_failed' | 'parse_error';
    constructor(message: string, kind: 'invalid_ref' | 'git_failed' | 'parse_error');
}
/** @deprecated use git-ref.js's validateGitRef directly for new code — kept
 *  here so existing importers of this module's validateGitRef keep getting
 *  a typed ChangedFilesError('invalid_ref') instead of InvalidGitRefError. */
export declare function validateGitRef(ref: string): string;
export declare function getChangedFiles(root: string, sinceRef: string): Promise<Set<string>>;
export declare function filterResultsByChangedFiles<T extends {
    filePath?: string | null;
}>(results: T[], changedPaths: Set<string>): T[];
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