Falk-Petersen focused on improving reliability in the ecmwf/anemoi-utils repository by addressing a critical issue in module version tracking. Using Python, he delivered a targeted bug fix that involved iterating over a copy of sys.modules rather than the original dictionary, thereby preventing runtime errors caused by modifying the dictionary during iteration. This approach ensured consistent and accurate version tracking during updates, directly enhancing the stability of the codebase. While the work was limited to a single bug fix over the month, it demonstrated careful attention to detail and a solid understanding of Python’s module system and safe iteration practices.