/**
 * Provider Registry 实现
 *
 * 管理 embedding 供应商和模型元信息
 */
import { ProviderRegistry } from './ProviderRegistry';
import type { EmbeddingModelInfo, ProviderInfo } from './ProviderRegistry';
export declare class ProviderRegistryImpl extends ProviderRegistry {
    private providers;
    private aliases;
    constructor();
    listProviders(): Promise<ProviderInfo[]>;
    getProvider(providerId: string): Promise<ProviderInfo | null>;
    getEmbeddingModel(providerId: string, modelId: string): Promise<EmbeddingModelInfo | null>;
    getModelDimension(providerId: string, modelId: string): Promise<number | null>;
    private normalizeProviderId;
}