import type { VoiceCapability, VoiceProviderMetadata } from './types.js';
export declare function registerVoiceProviderMetadata(metadata: VoiceProviderMetadata): () => void;
export declare function getVoiceProviderMetadata(capability: VoiceCapability, providerId: string): VoiceProviderMetadata | undefined;
export declare function listVoiceProviderMetadata(capability?: VoiceCapability): VoiceProviderMetadata[];
export declare function _clearVoiceProviderMetadataRegistryForTests(): void;