/**
 * @module @nhtio/adk/batteries/vector/duckdb
 *
 * In-process DuckDB adapter (like sqlite_vec — no server). Uses the `vss` community
 * extension for vector distance functions over a `FLOAT[N]` column; metadata lives in a
 * `JSON` column filtered with DuckDB's `json_extract*` functions. Each collection is a
 * table; the document and id are plain columns.
 *
 * Driver: `@duckdb/node-api` (promise-based). Path defaults to `:memory:`.
 */
import { BaseVectorStore } from "../contract";
import type { SearchPlan, UpsertPlan, DeletePlan, CollectionSpec } from "../plan";
import type { VectorMatch, VectorStoreCapabilities, BaseVectorStoreOptions } from "../types";
export interface DuckDBVectorStoreOptions extends BaseVectorStoreOptions {
    /** Connection and authentication parameters for the backend. */
    connection?: {
        path?: string;
    };
}
export declare class DuckDBVectorStore 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>;
}