/**
 * MCP client manager for external MCP servers
 */
import { Client } from "@modelcontextprotocol/sdk/client/index.js";
import type { ServerConfig } from "../types/config.js";
export declare class McpClientManager {
    private clients;
    private stderrBuffers;
    constructor();
    getClient(serverName: string, serverConfig: ServerConfig): Promise<Client>;
    closeAll(): Promise<void>;
    /**
     * Get captured stderr output for a server
     * @param serverName - The server name
     * @returns Array of stderr lines, or empty array if none
     */
    getStderr(serverName: string): string[];
    /**
     * Clear stderr buffer for a server (typically before a call to prepare for fresh output)
     *
     * Note: We mutate the existing array (buffer.length = 0) rather than replacing it
     * because the transport's stderr event handler has a closure reference to the original
     * array. If we replace the array in the Map, writes would continue going to the old array.
     *
     * @param serverName - The server name
     */
    clearStderr(serverName: string): void;
    private createTransport;
}
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