import { InjectionKey } from 'vue';
import { TTSProvider } from './providers/types.js';
/**
 * Vue injection key used by `app.provide()` (via the VueSpeech plugin)
 * and `inject()` (inside composables) to pass the active TTSProvider
 * down the component tree without prop-drilling.
 */
export declare const SPEECH_PROVIDER_KEY: InjectionKey<TTSProvider>;