Rodrigo focused on stabilizing the rendering logic in the spectreconsole/spectre.console repository by addressing a crash in the SegmentShape.Calculate method. He implemented defensive programming techniques in C# to prevent an InvalidOperationException when the lines list was empty, adding an early guard before calling Enumerable.Max. To ensure reliability, Rodrigo also created a unit test that verifies SegmentShape.Calculate returns zero width for empty input, thereby strengthening test coverage. His work emphasized exception handling and code health, targeting a specific bug rather than new features. This contribution improved the robustness of the codebase and demonstrated careful attention to stability and maintainability.