import type { EventEmitter } from "node:events";
export interface ManagedSubagentProcess extends EventEmitter {
    kill: (signal?: NodeJS.Signals | number) => boolean;
    pid?: number;
}
export declare function registerActiveSubagentProcess(child: ManagedSubagentProcess): () => void;
export declare function cleanupActiveSubagentProcesses(terminate?: (child: ManagedSubagentProcess, signal: NodeJS.Signals) => void): void;
export declare function activeSubagentProcessCount(): number;
export declare function terminateSubagentProcess(child: ManagedSubagentProcess | undefined, signal: NodeJS.Signals): void;