Jackson O’Donnell focused on enhancing the reliability of the GMOS tilted-slit data reduction workflow in the pypeit/PypeIt repository. He addressed a specific bug affecting mask definition handling for Gemini GMOS tilted-slit configurations, which previously led to data-reduction failures. By updating the relevant routines and maintaining comprehensive documentation in reStructuredText (rst), Jackson improved the pipeline’s stability and reduced potential processing errors. His work included validating the updated workflow and ensuring that release notes accurately reflected the changes. This targeted engineering effort demonstrated depth in troubleshooting and documentation, contributing to a more robust experience for users processing GMOS data.