export declare function currentVersion(): string;
export declare function selfUpdate(): void;
/** Check whether a newer crtr version is available on npm.
 *  Warns to stderr if network unavailable; returns {current, latest} or null if unreachable. */
export declare function selfCheck(): {
    current: string;
    latest: string;
} | null;
/** Pull updates for all installed marketplaces and standalone plugins. */
export declare function contentUpdate(): void;
export interface ContentUpdateEntry {
    name: string;
    kind: 'marketplace' | 'plugin';
    current: string | null;
    latest: string | null;
    up_to_date: boolean;
    unreachable: boolean;
}
/** Check whether any marketplace/plugin has updates available.
 *  Returns per-item status without applying anything. */
export declare function contentCheck(): ContentUpdateEntry[];