/** SDK-owned platform module. This implementation is maintained in goodvibes-sdk. */
/**
 * ProviderEvent, discriminated union for provider registry and fallback events.
 */
export type ProviderEvent = {
    type: 'PROVIDERS_CHANGED';
    added: string[];
    removed: string[];
    updated: string[];
} | {
    type: 'PROVIDER_WARNING';
    message: string;
} | {
    type: 'MODEL_FALLBACK';
    from: string;
    to: string;
    provider: string;
}
/** One billable voice call on a METERED provider (local engines emit nothing). */
 | {
    type: 'PROVIDER_VOICE_USAGE';
    provider: string;
    modelId?: string | undefined;
    kind: 'tts' | 'stt';
    billableUnits: number;
    unit: 'characters' | 'seconds';
} | {
    type: 'MODEL_CHANGED';
    registryKey: string;
    provider: string;
    previous?: {
        registryKey: string;
        provider: string;
    };
};
export type ProviderEventType = ProviderEvent['type'];
//# sourceMappingURL=providers.d.ts.map