/**
 * Vercel AI Gateway login flow.
 *
 * Vercel AI Gateway proxies upstream model providers through a unified endpoint.
 *
 * This is not OAuth - it's a simple API key flow:
 * 1. Open Vercel AI Gateway docs
 * 2. User copies their API key
 * 3. User pastes the API key into the CLI
 */
import type { OAuthController } from "./types";
/**
 * Login to Vercel AI Gateway.
 *
 * Opens browser to Vercel AI Gateway docs and prompts for an API key.
 * Returns the API key directly (not OAuthCredentials - this isn't OAuth).
 */
export declare function loginVercelAiGateway(options: OAuthController): Promise<string>;