Trevor Hayes developed a mass-select target proliferate action for the Card-Forge/forge repository, focusing on enhancing user efficiency during proliferate workflows. He introduced a dedicated MassSelectMode enum in Java, which standardized the behavior for selecting multiple targets and streamlined the underlying logic. By integrating UI design improvements, Trevor reduced the manual steps required for batch operations, allowing users to select multiple targets in a single action. This feature addressed scalability concerns and improved operator throughput for game development scenarios. The work demonstrated depth in both backend logic and user interface integration, leveraging Trevor’s skills in Java and UI design for robust feature delivery.