Pierfrancesco Butti focused on enhancing the reliability of track reconstruction in the andiwand/acts repository by addressing a specific issue in the hole-detection logic. Using C++ and leveraging skills in algorithm development and physics simulation, he implemented a pre-condition check that ensures surfaces are only marked as holes when measurements are anticipated. This targeted bug fix reduced false positives, resulting in cleaner data and more accurate downstream analyses. The work demonstrated careful attention to code quality, with clear documentation and commit messaging that supported traceability and review. Although no new features were added, the depth of the fix improved overall system trustworthiness.