import type { ILLMProvider } from "../llm/ILLMProvider.ts";
import type { IVectorStore } from "../memory/VectorStore.ts";
import type { IGraphStore } from "./KnowledgeGraphStore.ts";
export interface RetrievalOptions {
    topK?: number;
    minScore?: number;
    metadataFilter?: Record<string, unknown>;
    resolveParents?: boolean;
}
export interface RetrievalResult {
    content: string;
    score: number;
    source: string;
    chunkIndex: number;
    metadata?: Record<string, unknown>;
    graphContext?: string;
}
export declare class Retriever {
    private embedder;
    private vectorStore;
    private knowledgeGraphStore?;
    private parentStorePath;
    private parentCache;
    private parentCacheTime;
    private readonly parentCacheTTL;
    constructor(embedder: ILLMProvider, vectorStore: IVectorStore, knowledgeGraphStore?: IGraphStore, parentStorePath?: string);
    retrieve(query: string, options?: RetrievalOptions): Promise<RetrievalResult[]>;
    private loadParents;
}
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