During December 2025, Wancheng focused on improving code hygiene and build stability for the apache/gravitino repository. He addressed a classpath shadowing issue by replacing all shadowed Glassfish Guava imports with the original Guava library, ensuring consistent dependency usage throughout the codebase. To prevent similar problems in the future, he enhanced the Gradle build process by introducing three Spotless replaceRegex actions, automating import validation and enforcing best practices. All changes were validated with a comprehensive suite of Java unit tests, resulting in a more maintainable and robust build process without introducing any user-facing modifications or new features.