import type { ReadResult } from '@undefineds.co/extensions';
import type { EmbeddingService } from '../ai/service/EmbeddingService';
import type { CredentialResolver, ExtensionContext, ExtensionEmbedInput, ExtensionEmbedResult, ExtensionFetch, ExtensionReadInput, ExtensionRuntime } from './types';
export interface DefaultExtensionRuntimeOptions {
    credentialResolver: CredentialResolver;
    embeddingService?: Pick<EmbeddingService, 'embedBatch'>;
    fetch?: ExtensionFetch;
}
export declare class DefaultExtensionRuntime implements ExtensionRuntime {
    private readonly credentialResolver;
    private readonly embeddingService?;
    private readonly providerFetch?;
    constructor(options: DefaultExtensionRuntimeOptions);
    read(context: ExtensionContext, input: ExtensionReadInput): Promise<ReadResult>;
    embed(context: ExtensionContext, input: ExtensionEmbedInput): Promise<ExtensionEmbedResult>;
    private resolveApiKeyCredential;
}