import { type LLMTask, type TokenUsageRecord } from '@cortex/core';
export declare function estimateCost(model: string, inputTokens: number, outputTokens: number): number;
export declare class TokenTracker {
    private records;
    private monthlyBudgetUsd;
    private warningThresholds;
    private warningsFired;
    constructor(monthlyBudgetUsd?: number, warningThresholds?: number[]);
    record(requestId: string, task: LLMTask, provider: string, model: string, inputTokens: number, outputTokens: number, latencyMs: number): TokenUsageRecord;
    private checkBudget;
    getCurrentMonthSpend(): number;
    isBudgetExhausted(): boolean;
    getBudgetRemaining(): number;
    getRecords(): TokenUsageRecord[];
    getSummary(): {
        totalCostUsd: number;
        totalInputTokens: number;
        totalOutputTokens: number;
        requestCount: number;
        costByTask: Record<string, number>;
        costByProvider: Record<string, number>;
    };
}
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