import type { Connector, ConnectorCapabilities, ConnectorConfig, QueryResult, SchemaTable } from '../types.js';
/**
 * Operator SQL executor. `query()` is closed on purpose: ungated SQL must
 * not reach the function. The MCP `query` tool calls `runGoverned()` after
 * the gate. Schema discovery is optional and not implemented here.
 */
export declare class CustomSqlConnector implements Connector {
    name: string;
    description: string;
    capabilities: ConnectorCapabilities;
    private moduleSpec?;
    private execute?;
    constructor(config: ConnectorConfig);
    connect(): Promise<void>;
    disconnect(): Promise<void>;
    listTables(): Promise<SchemaTable[]>;
    describeTable(_table: string): Promise<SchemaTable>;
    search(_query: string, _tables?: string[]): Promise<QueryResult>;
    query(_sql: string, _params?: unknown[]): Promise<QueryResult>;
    runGoverned(sql: string): Promise<QueryResult>;
}
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