Benno Achermann developed cross-repository tagging enhancements for Joomla-based projects, focusing on batch operations and deprecation planning. In the Fedik/joomla-cms repository, he implemented batch tagging for multiple items, enabling users to add or remove tags efficiently while maintaining backward compatibility. For joomdonation/joomla-cms, he refactored tag management by introducing deprecation notices for legacy batch removal methods, signaling future simplification. He also updated documentation in joomla/Manual to reflect these workflow changes and guide migration. Using PHP, JavaScript, and API design skills, Benno’s work streamlined content management, reduced manual effort, and established a clear path for future tag management improvements.