/**
 * Resolve the WebSocket URL the cortex-client connects to.
 *
 * Precedence: ``CORTEX_SERVER_URL`` env > config ``serverUrl`` > ``ws://host:port``.
 * The env override lets an operator point a client at a tunnel without editing the
 * durable config; ``serverUrl`` is the durable tunnel route in cortex-client.json.
 */
export declare function resolveServerUrl(cfg: {
    serverUrl?: string;
    serverHost?: string;
    serverPort?: number;
}, env: {
    CORTEX_SERVER_URL?: string;
}): string;