/**
 * @module @nhtio/adk/batteries/vector/neo4j
 *
 * Neo4j adapter (native vector index, 5.13+). Each collection is a node label; records are
 * nodes with `id`/`vec`/`document`/`metadata` properties and a `VECTOR INDEX` on `vec`. KNN
 * uses `db.index.vector.queryNodes(index, k, vector)` (score is the similarity, already [0,1]
 * for cosine). Metadata is a JSON string property filtered with the neutral filter tree's JS
 * reference evaluator for exact cross-adapter parity.
 *
 * Driver: `neo4j-driver` (pure JS). Labels/index names can't be Cypher-parameterized, so they
 * are derived from the (sanitized) collection name; all values are parameterized.
 */
import { BaseVectorStore } from "../contract";
import type { SearchPlan, UpsertPlan, DeletePlan, CollectionSpec } from "../plan";
import type { VectorMatch, VectorStoreCapabilities, BaseVectorStoreOptions } from "../types";
export interface Neo4jVectorStoreOptions extends BaseVectorStoreOptions {
    /** Connection and authentication parameters for the backend. */
    connection: {
        url: string;
        username?: string;
        password?: string;
        database?: string;
    };
}
export declare class Neo4jVectorStore extends BaseVectorStore {
    #private;
    readonly capabilities: VectorStoreCapabilities;
    /** Static availability probe: whether this adapter's runtime driver can load in the current environment. */
    static isAvailable(): boolean;
    isAvailable(): boolean;
    connect(): Promise<void>;
    close(): Promise<void>;
    createCollection(spec: CollectionSpec, ifNotExists: boolean): Promise<void>;
    dropCollection(collection: string, _ifExists: boolean): Promise<void>;
    hasCollection(collection: string): Promise<boolean>;
    renameCollection(_from: string, _to: string): Promise<void>;
    executeUpsert(plan: UpsertPlan): Promise<void>;
    executeSearch(plan: SearchPlan): Promise<VectorMatch[]>;
    executeDelete(plan: DeletePlan): Promise<void>;
}