export interface ParsedCodexUsage {
    clientInputTokens?: number;
    clientOutputTokens?: number;
    clientCacheWriteTokens?: number;
    clientCacheReadTokens?: number;
    clientTotalTokens?: number;
}
export declare function parseCodexUsageFromOutput(stdout: string, stderr: string): ParsedCodexUsage | null;
export declare function mergeUsageWithTotal(usage: ParsedCodexUsage): ParsedCodexUsage;