import type { ServerConfig } from '@/config/types.js';
export declare class SSHExecutor {
    private connections;
    execute(server: ServerConfig, command: string): Promise<string>;
    executeWithOutput(server: ServerConfig, command: string): Promise<{
        stdout: string;
        stderr: string;
        exitCode?: number;
    }>;
    private getClient;
    private getConnectionKey;
    private dropClient;
    private isStaleConnectionError;
    closeAll(): Promise<void>;
    getConnectionCount(): number;
}