During January 2025, Gordon Wong focused on improving the correctness and maintainability of binary file I/O in the IAS-Astrophysics/athenak repository. He addressed a bug in the Write_any_type_at* functions, ensuring the return value was compared against the actual data size rather than a constant, which previously risked incomplete binary writes and potential data corruption. His work involved C++ and file I/O, applying the fix across multiple source files and performing code linting to enhance code quality. Although no new features were added, Gordon’s targeted bug fix improved the reliability of binary serialization, supporting the stability of downstream data processing.