/**
 * @module @nhtio/adk/batteries/vector/arangodb
 *
 * ArangoDB adapter (experimental vector index, 3.12.4+). Each collection is an ArangoDB
 * document collection keyed by `_key`; a `vector` index on `vec` enables KNN via
 * `APPROX_NEAR_COSINE` / `APPROX_NEAR_L2`. Metadata is a JSON string attribute filtered with
 * the neutral filter tree's JS reference evaluator for exact cross-adapter parity.
 *
 * Driver: `arangojs` (pure JS). Requires the server started with
 * `--experimental-vector-index=true`. All values are passed as AQL bind parameters.
 */
import { BaseVectorStore } from "../contract";
import type { SearchPlan, UpsertPlan, DeletePlan, CollectionSpec } from "../plan";
import type { VectorMatch, VectorStoreCapabilities, BaseVectorStoreOptions } from "../types";
export interface ArangoDBVectorStoreOptions extends BaseVectorStoreOptions {
    /** Connection and authentication parameters for the backend. */
    connection: {
        url: string;
        username?: string;
        password?: string;
        database?: string;
        nLists?: number;
    };
}
export declare class ArangoDBVectorStore 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>;
}