export type BrowserLoginResult = {
    token: string;
};
/** A human-readable default token nickname, e.g. "HELIX CLI (my-laptop)". */
export declare function defaultClientTokenName(): string;
/**
 * Derive the website URL from the API URL: `https://api.helixgame.com` →
 * `https://helixgame.com`. For local dev (e.g. backend on localhost) the host
 * isn't an `api.` subdomain of the site, so pass `--web-url` explicitly.
 */
export declare function deriveWebUrl(apiUrl: string): string;
/**
 * Run the loopback login flow. Resolves with the captured client token, or
 * rejects on timeout / state mismatch / a site-reported error.
 */
export declare function browserLogin(opts: {
    webUrl: string;
    name: string;
    openBrowser?: boolean;
    timeoutMs?: number;
    onUrl?: (url: string) => void;
}): Promise<BrowserLoginResult>;