/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Centralized SettingsService singleton instance
 */
import { SettingsService } from './SettingsService.js';
/**
 * Get or create the global SettingsService singleton instance.
 * Resolves through the currently active ProviderRuntimeContext when present.
 */
export declare function getSettingsService(): SettingsService;
/**
 * Register an externally created SettingsService with the active runtime context.
 */
export declare function registerSettingsService(settingsService: SettingsService): void;
/**
 * Reset the settings service instance (for testing)
 */
export declare function resetSettingsService(): void;