Developed a card set prioritization and display enhancement for the Cockatrice/Cockatrice repository, focusing on improving the organization and consistency of card set presentation within the user interface. The work involved implementing a set-type prioritization system that distinguishes between Core and Expansion sets, refactoring the existing sorting logic to respect these new priorities. Leveraging C++ for core development and XML parsing, the developer updated underlying data structures to support the new feature. This approach not only streamlined navigation for users but also established a scalable foundation for future enhancements, demonstrating a methodical application of software design and data structure expertise.