export type TaskStatus = 'working' | 'input_required' | 'completed' | 'failed' | 'cancelled';
export interface TaskState {
    taskId: string;
    status: TaskStatus;
    statusMessage?: string;
    createdAt: string;
    lastUpdatedAt: string;
    ttl: number | null;
    pollInterval?: number;
    result?: any;
    error?: any;
}
export declare class TaskManager {
    private tasks;
    private defaultTtl;
    private defaultPollInterval;
    private maxTasks;
    constructor(options?: {
        defaultTtl?: number;
        defaultPollInterval?: number;
        maxTasks?: number;
    });
    createTask(requestedTtl?: number): TaskState;
    getTask(taskId: string): TaskState | undefined;
    updateStatus(taskId: string, status: TaskStatus, statusMessage?: string): TaskState;
    completeTask(taskId: string, result: any): TaskState;
    failTask(taskId: string, error: any): TaskState;
    cancelTask(taskId: string): TaskState;
    listTasks(cursor?: string, limit?: number): {
        tasks: TaskState[];
        nextCursor?: string;
    };
    waitForCompletion(taskId: string, timeoutMs?: number): Promise<TaskState>;
    private isExpired;
    private cleanup;
}