During July 2025, StanFromIreland contributed to the StanFromIreland/cpython repository by enhancing the ModuleNotFoundError guidance when Python is run with the -S option. This update improved error clarity by providing more informative messages, helping developers quickly identify missing modules and reducing time spent on debugging. Stan approached the problem through backend development, focusing on robust error handling and incorporating unit testing to ensure reliability. The work was implemented in Python and integrated via Git-based workflows. While the contribution was focused on a single feature, it addressed a nuanced aspect of developer experience, demonstrating attention to detail and practical problem-solving skills.