Worked on the vchelaru/Gum repository to deliver a custom asset-loading enhancement, focusing on improving the flexibility and reliability of project loading. Developed the FileManager.CustomGetStreamFromFile method in C# to enable custom asset handling, allowing Gum projects to load assets from streams rather than fixed file paths. Added comprehensive unit tests to ensure robust loading behavior and prevent regressions, emphasizing test-driven development practices. Upgraded the MonoGame framework to version 3.8.4.1, enhancing performance and compatibility for future development. The work centered on feature delivery and infrastructure improvements, leveraging C#, MonoGame, and unit testing to strengthen the asset pipeline.