export interface Task {
    taskId: string;
    status: "working" | "input_required" | "completed" | "failed" | "cancelled";
    statusMessage?: string;
    createdAt: string;
    lastUpdatedAt: string;
    ttl: number;
    pollInterval?: number;
}
/** Implement task store. */
export declare class TaskStore {
    private tasks;
    private results;
    private lastSweep;
    create(ttl: number): Task;
    get(taskId: string): Task | undefined;
    complete(taskId: string, result: unknown): void;
    fail(taskId: string, message: string): void;
    cancel(taskId: string): boolean;
    getResult(taskId: string): unknown | undefined;
    list(): Task[];
    clear(): void;
    private isExpired;
    private lazySweep;
    private sweep;
    private evictOldest;
}
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