During May 2025, Zxctl focused on enhancing configuration reliability for the Winds-Studio/Leaf repository, addressing a critical bug that affected Spark flag management. Working primarily with Java and leveraging backend development and configuration management skills, Zxctl improved the LeafConfig component to prevent accidental overwriting of Spark flags during configuration loading. The solution involved implementing robust null checks for system properties tied to extra configurations and hidden paths, ensuring safer and more predictable deployments across diverse environments. This targeted fix reduced configuration-related incidents and downtime, resulting in more stable Spark-based job execution and simplifying ongoing maintenance for the Winds-Studio/Leaf codebase.