/**
 * OpenCode caches npm plugins per spec dir and never re-resolves a tag while
 * the cache exists, so an unpinned plugin keeps running the first-installed
 * version forever. On load, check the registry; if a newer version exists,
 * delete our spec cache dir so the next OpenCode start cold-installs it.
 * The running process is unaffected (its module is already in memory).
 */
export declare function isNewerVersion(candidate: string, current: string): boolean;
/** Locate the spec cache dir (…/packages/<spec>) from a module URL inside it. */
export declare function specCacheDir(moduleUrl: string, packageName: string): string | undefined;
export interface SelfUpdateOptions {
    packageName: string;
    moduleUrl: string;
    client?: unknown;
    fetchImpl?: typeof fetch;
    rmImpl?: (dir: string) => Promise<void>;
}
/** Fire-and-forget; never rejects, never blocks plugin load. Returned promise aids tests. */
export declare function checkForSelfUpdate(options: SelfUpdateOptions): Promise<void>;
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