Worked on the Redot-Engine/redot-engine repository to enhance the reliability of the input subsystem, specifically addressing issues with SDL joypad mapping ownership detection. Focused on improving the correctness of Input.is_joy_known by implementing a targeted fix that ensures the system accurately determines whether SDL or the application manages a joypad’s mapping. Utilized C++ programming and input handling expertise to integrate an upstream patch, maintaining codebase consistency and reducing controller mapping misclassification. The work prioritized stability and user experience in game development contexts, delivering a low-risk, review-friendly change that improved SDL joystick input reliability without introducing new features during the period.