export interface AnonymousIdResult {
    /** Stable anonymous id, or null if it could not be read/created. */
    anonymousId: null | string;
    /** True only on the run that first created the id file. */
    isFirstRun: boolean;
}
/**
 * Read the persisted anonymous id, or create and persist a new random UUID.
 * Never throws: on any filesystem error returns { anonymousId: null, isFirstRun: false }.
 *
 * @param dataDir - directory to store telemetry.json (defaults to the OS app-data dir).
 */
export declare function getOrCreateAnonymousId(dataDir?: string): AnonymousIdResult;
//# sourceMappingURL=anonymous-id.d.ts.map