During March 2025, Agarzi contributed to the kamailio/kamailio repository by addressing a bug in the sanity checks module. He identified and corrected a typo in the 'Invalid To Header' error message, changing 'Ivalid' to 'Invalid' to improve the clarity of error reporting. Working in C, Agarzi demonstrated attention to code hygiene and error handling, ensuring that the module’s output was more understandable for users and maintainers. Although the scope of work was limited to a single bug fix and did not involve new feature development, the update enhanced the reliability and maintainability of the codebase through disciplined version control.