Fin W. upgraded the KDDockWidgets library in the nextcloud/craft-blueprints-kde repository, focusing on enabling Qt 6 compatibility and modernizing the UI docking framework. Using Python, Fin managed the build and dependency systems to update the target version, download URL, and SHA256, ensuring the project could leverage the latest features of Qt 6 and the 'qtwidgets' frontend. This work improved the maintainability and forward compatibility of the codebase, reducing future technical debt and supporting faster delivery of UI-centric features. The depth of the upgrade reflects careful attention to long-term project health and robust build system management practices.