/**
 * Usage data service — thin wrapper over loader + aggregator for the Commander API.
 */
export type UsageQueryOpts = {
    provider?: string;
    days?: number;
    since?: string;
    until?: string;
    monthly?: boolean;
};
export type SerializedProviderStats = {
    input: number;
    output: number;
    cacheWrite: number;
    cacheRead: number;
    reasoning: number;
    cost: number;
    models: string[];
};
export type SerializedDailyStats = {
    date: string;
    input: number;
    output: number;
    cacheWrite: number;
    cacheRead: number;
    reasoning: number;
    cost: number;
    models: string[];
    providers: string[];
    providerStats: Record<string, SerializedProviderStats>;
};
export declare function getUsageData(opts?: UsageQueryOpts): Promise<SerializedDailyStats[]>;