During May 2025, Xwxw contributed to the AvaloniaUI/angle repository, focusing on enhancing code safety and reliability in C++. They addressed a bug in the performance testing suite by correcting the size_t formatting, ensuring accurate memory size reporting and more reliable performance measurements. Xwxw also introduced the ANGLE_FORMAT_PRINTF compiler attribute to the StringPrintf function, enabling compile-time format string validation and reducing the risk of runtime errors. Their work leveraged C++ and compiler attributes to improve static analysis and code robustness. These targeted improvements supported safer string formatting and more precise memory usage analysis, reflecting a thoughtful approach to code quality.