/**
 * @license
 * Copyright 2025 Vybestack LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Token merge utility for credential refresh operations.
 * Extracted from OAuthManager for shared use by proxy server.
 *
 * @plan PLAN-20250214-CREDPROXY.P06
 * @requirement R12.1, R12.2, R12.3, R12.4, R12.5
 * @pseudocode analysis/pseudocode/002-token-sanitization-merge.md
 */
import { type OAuthToken } from './types.js';
export type OAuthTokenWithExtras = OAuthToken & Record<string, unknown>;
export declare function mergeRefreshedToken(current: OAuthTokenWithExtras, next: Partial<OAuthTokenWithExtras>): OAuthTokenWithExtras;