export declare const CACHE_TTL_MS: number;
export interface UpdateCheckOptions {
    notify(message: string, level: "info" | "warning" | "error"): void;
    currentCliVersion: string;
    currentBundledForgeVersion: string;
    now?: () => number;
    fetchImpl?: typeof fetch;
    cacheDir?: string;
}
export interface UpdateBannerCache {
    lastProbeAt: number;
    latestNpmVersion: string | null;
    latestForgeVersion: string | null;
    dismissedNpmVersions: string[];
    dismissedForgeVersions: string[];
}
declare function cachePath(cacheDir: string): string;
declare function readCache(cacheDir: string): Promise<UpdateBannerCache | null>;
declare function writeCache(cacheDir: string, cache: UpdateBannerCache): Promise<void>;
declare function semverGt(a: string, b: string): boolean;
declare function composeBanner(npm: {
    current: string;
    latest: string;
} | null, forge: {
    current: string;
    latest: string;
} | null): string | null;
export declare function triggerUpdateCheck(opts: UpdateCheckOptions): Promise<void>;
export declare const __test__: {
    CACHE_TTL_MS: number;
    cachePath: typeof cachePath;
    readCache: typeof readCache;
    writeCache: typeof writeCache;
    semverGt: typeof semverGt;
    composeBanner: typeof composeBanner;
};
export {};