During July 2025, this developer contributed to the 389ds/389-ds-base repository by implementing a new feature for the Uiduniq plugin, enabling customizable attribute matching rules within filters. The work involved parser-based handling of colon-delimited attribute names, allowing administrators to specify different matching behaviors and enhancing the flexibility of attribute uniqueness enforcement. Using C and leveraging LDAP expertise, the developer addressed a key flexibility gap identified in Issue 6857, focusing on robust system programming practices. This contribution improved data integrity and policy customization, laying the groundwork for broader validation and deployment across diverse environments without introducing new bug fixes that month.