import { AgentExecutionEvent, ExecutionEventBus } from '@a2a-js/sdk/server';
import { PSAgent } from '../PSAgent';
import { IStreamLogger } from '../PSAgentLogger';
import { PSAgentTool } from '../PSAgentTool';
export declare class PSExecutionEventBus implements ExecutionEventBus {
    listeners: {
        [eventName: string]: ((event: AgentExecutionEvent) => void)[];
    };
    publish(event: AgentExecutionEvent): void;
    on(eventName: 'event' | 'finished', listener: (event: AgentExecutionEvent) => void): this;
    off(eventName: 'event' | 'finished', listener: (event: AgentExecutionEvent) => void): this;
    once(eventName: 'event' | 'finished', listener: (event: AgentExecutionEvent) => void): this;
    removeAllListeners(eventName?: 'event' | 'finished'): this;
    finished(): void;
}
export declare class PSSubAgentTool extends PSAgentTool {
    static TOOL_NAME: string;
    private readonly sub_agents;
    constructor(sub_agents: PSAgent[]);
    run(input: Record<string, any>, log?: IStreamLogger): Promise<Record<string, any>>;
}