import { Document } from "@langchain/core/documents";
import { VectorStore, VectorStoreRetriever, VectorStoreRetrieverInput } from "@langchain/core/vectorstores";
export type ScoreThresholdRetrieverInput<V extends VectorStore> = Omit<VectorStoreRetrieverInput<V>, "k"> & {
    maxK?: number;
    kIncrement?: number;
    minSimilarityScore: number;
};
export declare class ScoreThresholdRetriever<V extends VectorStore> extends VectorStoreRetriever<V> {
    minSimilarityScore: number;
    kIncrement: number;
    maxK: number;
    constructor(input: ScoreThresholdRetrieverInput<V>);
    getRelevantDocuments(query: string): Promise<Document[]>;
    static fromVectorStore<V extends VectorStore>(vectorStore: V, options: Omit<ScoreThresholdRetrieverInput<V>, "vectorStore">): ScoreThresholdRetriever<V>;
}