/**
 * Authentication — OAuth flow with IndigoAI
 * Opens browser for sign-in, receives tokens via localhost callback
 */
import type { Credentials } from "./types.js";
export declare function hasCredentials(): boolean;
export declare function readCredentials(): Credentials | null;
export declare function writeCredentials(creds: Credentials): void;
export declare function clearCredentials(): void;
/**
 * Start OAuth flow:
 * 1. Open browser to AUTH_URL with callback port
 * 2. Start localhost server to receive tokens
 * 3. Store credentials
 */
export declare function authenticate(): Promise<Credentials>;
/**
 * Refresh temporary AWS credentials using refresh token
 */
export declare function refreshAwsCredentials(creds: Credentials): Promise<Credentials>;
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