import { ProviderUsage } from "./types.js";
export declare function usageFromCodexRateLimits(rateLimits: unknown, options: {
    observedAt?: string;
    source: string;
}): ProviderUsage | null;
export declare function collectCodexUsage(codexHome?: string, options?: {
    tailChunkBytes?: number;
}): ProviderUsage;