Regis Camimura developed a Python Version Compatibility Warning System for the psf/black repository, focusing on proactive error handling and user guidance. The feature detects when the target Python version specified by the user exceeds the runtime environment, issuing clear warnings and actionable advice to resolve version mismatches. Regis implemented this entirely in Python, emphasizing robust testing to ensure reliability and user safety. By enhancing error messaging and introducing automated compatibility checks, the work streamlines upgrade decisions and reduces the risk of runtime failures. The project demonstrates depth in Python development and thoughtful attention to improving the user experience through targeted feature delivery.