import { EventEmitter } from "events";
export interface TaskEvent {
    taskId: string;
    status: "completed" | "failed" | "progress";
    data?: unknown;
    error?: string;
}
export declare class WebListener extends EventEmitter {
    private tasksInProgress;
    private maxTasksPerSession;
    constructor(maxTasksPerSession?: number);
    registerTask(taskId: string, sessionId: string): void;
    notifyCompletion(event: TaskEvent): void;
    onTaskCompletion(taskId: string, callback: (event: TaskEvent) => void): () => void;
    onTaskFailure(taskId: string, callback: (event: TaskEvent) => void): () => void;
    onTaskProgress(taskId: string, callback: (event: TaskEvent) => void): () => void;
    getTasksInProgress(sessionId: string): string[];
    cleanupSessionTasks(sessionId: string): void;
}