/**
 * Cost tracking.
 *
 * MiniMax doesn't expose an OpenRouter-style `/generation` endpoint for
 * authoritative cost lookup, so we compute cost locally from token
 * counts using the user-configured price per 1M tokens. Pricing is
 * intentionally user-overridable so the same package works as MiniMax
 * revises their rates.
 */
import type { CostSummary, Usage } from "./types.js";
export declare function computeCost(usage: Usage, priceInputPer1M: number, priceOutputPer1M: number): CostSummary;
export declare function aggregateUsage(usages: Usage[]): Usage;
export declare function aggregateCost(summaries: CostSummary[]): CostSummary;
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