During October 2024, Chris Hellen focused on backend development and permissions management for the folio-org/mod-circulation repository. He addressed a critical bug in the permissions update logic, resolving issue MODCAL-136 by correcting the authorization flow to prevent permission-related errors. Working primarily in Java, Chris improved the reliability of access control mechanisms, ensuring that permissions are updated accurately and unauthorized access is mitigated across circulation operations. Although no new features were released during this period, his work stabilized security-critical flows and reduced operational risk. The depth of his contribution reflects a targeted approach to enhancing security and backend robustness.