import type { CatalogTool } from '../types/index.js';
export interface CatalogDiff {
    added: string[];
    removed: string[];
    deprecated: string[];
    updated: string[];
    versionChange: {
        old: string;
        new: string;
    } | null;
}
export declare function diffCatalogs(oldTools: CatalogTool[], newTools: CatalogTool[], oldVersion?: string, newVersion?: string): CatalogDiff;
export declare function formatDiff(diff: CatalogDiff): string;