During April 2025, Karel Růžička focused on improving input reliability in the ppy/osu-framework repository by addressing a nuanced bug in slider drag interactions. He refined the event handling logic in C# to ensure that clicks outside the drag nub were correctly processed, enhancing the accuracy of value updates during relative dragging. His approach included isolating changes to the slider’s input handling without introducing breaking API changes, and he reinforced these updates with targeted unit tests. By emphasizing UI development and robust test coverage, Karel’s work reduced edge-case bugs and improved the overall play experience for users across platforms.