export type UsageBucket = {
    requestCount: number;
    successCount: number;
    errorCount: number;
    latencyMs: {
        sum: number;
        min: number;
        max: number;
    };
    tokens: {
        prompt: number;
        completion: number;
        total: number;
    };
};
export type DailyUsage = {
    byProviderKey: Record<string, UsageBucket>;
    byRoute: Record<string, UsageBucket>;
    byPool: Record<string, UsageBucket>;
    byEndpoint: Record<string, UsageBucket>;
};
export type TimeSeriesUsage = {
    days: Record<string, DailyUsage>;
    weeks: Record<string, DailyUsage>;
};
export type UsageTimeSeriesQuery = {
    fromMs?: number;
    toMs?: number;
};
export declare function loadUsageTimeSeries(query: UsageTimeSeriesQuery): Promise<TimeSeriesUsage>;
export declare function summarizeUsage(timeSeries: TimeSeriesUsage, period: 'day' | 'week' | 'all', group: 'provider' | 'route' | 'pool' | 'endpoint'): Record<string, UsageBucket>;