import type { VectorStorePayload, VectorStoreResult, VectorQueryPayload, VectorQueryResult } from '@flaxia/sdk';
interface VectorRecord {
    docId: string;
    vector: Float32Array;
    metadata: {
        title: string;
        url: string;
        snippet: string;
        [key: string]: unknown;
    };
    shardKey: string;
    storedAt: number;
}
export declare class VectorStoreEngine {
    private db;
    private hnsw;
    private shardInfo;
    private saveCounter;
    initialize(): Promise<void>;
    assignShard(rangeStart: number, rangeEnd: number): Promise<void>;
    store(payload: VectorStorePayload): Promise<VectorStoreResult>;
    query(payload: VectorQueryPayload): Promise<VectorQueryResult>;
    getVector(docId: string): Promise<VectorRecord | undefined>;
    deleteVector(docId: string): Promise<void>;
    getVectorCount(): number;
    private loadGraphFromDB;
    private saveGraphSnapshot;
}
export {};
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