Omar Ballesteros focused on stabilizing and improving backend logic for card game and data modeling systems over a two-month period. In the magefree/mage repository, he addressed complex exile interactions by refactoring card state management and ensuring exiled cards were handled robustly during casting, using Java and object-oriented programming principles. He enhanced reliability by introducing explicit action processing and zone retention, reducing edge-case errors in gameplay. In the kadai-io/kadai repository, Omar repaired copy constructors and restored assignment order in model objects, improving data integrity and deterministic behavior across object graphs. His work emphasized robust software design and maintainable codebases.