Worked on the Dungeon repository to improve code quality by refactoring entity presence checks throughout multiple test files and a source file. The approach replaced chained fetch(...).isPresent() calls with a direct isPresent(...) method, streamlining logic and reducing complexity. This Java development effort focused on enhancing readability and maintainability, laying a foundation for future features without introducing user-facing changes. Unit testing was updated to reflect the refactor, ensuring no functional regressions occurred. The work emphasized maintainable code practices and careful refactoring, leveraging Java and unit testing skills to support ongoing development and facilitate easier future enhancements within the Dungeon project.