export interface PackageRef {
    type?: string;
    id: string;
    version?: string;
}
/** Parse `type/id@version`, `id@version`, or `id`. */
export declare function parsePackageRef(input: string): PackageRef;
export declare function formatPackageRef(ref: PackageRef): string;
/** Loose compare: equal major.minor.patch strings, or prefix match for ranges like 2.3. */
export declare function versionMatches(installed: string, requested?: string): boolean;
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