Xueyi Zheng enhanced the Cozeloop Optimization Task framework in the coze-dev/coze-loop repository, focusing on backend development and infrastructure using Go. Over the course of a month, Xueyi introduced new benefit parameters, including amount and application timing, and added a resource type to support more granular optimization tasks. The work involved stabilizing data structures and updating special benefit structs to ensure data integrity across the system. These changes enabled more precise cost and benefit tracking, laying the groundwork for future optimization features. The project required cross-repository collaboration and demonstrated a methodical approach to evolving complex backend systems.