During February 2025, Petrillo focused on stabilizing drift axis handling within the TPC geometry utilities in the SBNSoftware/icaruscode repository. He addressed a regression introduced by v10 geometry updates by implementing a targeted bug fix in C++, ensuring the drift axis return logic correctly preserves drift direction handling. His work involved careful analysis of geometry processing and conditional logic, resulting in a solution that prevents drift-related errors in downstream analyses. By leveraging his expertise in C++ and geometry, Petrillo improved the reliability of data processing workflows. The depth of his contribution reflects a strong understanding of both bug fixing and version control.