import type { BudgetInfo } from "./types.js";
/** 预算追踪器（对标 wave-agent BudgetTracker）。 */
export declare class BudgetTracker {
    private _total;
    private totalSpent;
    constructor(_total?: number | null);
    addUsage(tokens: number): void;
    spent(): number;
    remaining(): number;
    isExceeded(): boolean;
    getInfo(): BudgetInfo;
}