import type { UpgradeType } from "./types.js";
export declare function getUpgradeType(current: string, latest: string): UpgradeType;
/**
 * Compare two Maven version strings. Returns negative if `a < b`,
 * positive if `a > b`, zero if equal.
 *
 * Order:
 *   1. Numeric core (major.minor.patch.…).
 *   2. Stability tier: stable > rc > milestone > beta > alpha > snapshot.
 *   3. Numeric tail within the pre-release suffix (e.g. `beta-1` < `beta-2`).
 *   4. Lexicographic fallback for full determinism.
 */
export declare function compareVersions(a: string, b: string): number;