import type { AuthTokens, SavedCredentials } from "./types.js";
export declare function loadCredentials(): Promise<SavedCredentials | null>;
export declare function saveCredentials(creds: SavedCredentials): Promise<void>;
export declare function clearCredentials(): Promise<void>;
export declare function login(email: string, password: string): Promise<AuthTokens>;
export declare function refreshToken(tokens: AuthTokens): Promise<AuthTokens>;
export declare function isTokenExpired(tokens: AuthTokens): boolean;
/** Check if env-var login should be attempted. Returns credentials or null.
 *  Reads from process.env first, then falls back to .env files. */
export declare function shouldAttemptEnvLogin(storedEmail: string): {
    email: string;
    password: string;
} | null;
/** Refresh tokens, falling back to env-var login if refresh fails */
export declare function refreshTokenWithFallback(tokens: AuthTokens): Promise<AuthTokens>;
export declare function getValidTokens(): Promise<AuthTokens>;