export type GatewayIdentity = {
    gatewayId: string;
    createdAt: string;
};
/**
 * Resolve or create a stable gateway identity UUID.
 * Persisted to `~/.skykoi/gateway-identity.json` so it survives restarts.
 */
export declare function resolveGatewayId(env?: Record<string, string | undefined>): string;