Andy focused on enhancing code quality and maintainability across the ppy/osu and ppy/osu-framework repositories during March 2025. He removed dead code by eliminating the unused HandleScale method, streamlining the codebase and reducing maintenance overhead. Leveraging his expertise in C# and clean code practices, Andy enabled nullable reference types within the osu.Framework.Text namespace, systematically propagating null-safety improvements to catch potential errors at compile time. He further strengthened test reliability by enforcing non-nullable types in osu.Framework.Tests, initializing variables with non-null assertions. These targeted refactoring efforts improved runtime safety and maintainability, reflecting a thoughtful approach to framework development and unit testing.