Contributed to the lvgl/lvgl repository by implementing getter and setter functions for user data within the group structure, enhancing data management and laying groundwork for future group-related features. Focused on API design in C to ensure safer and more consistent access to group.user_data across modules, which improves maintainability and code safety. Collaborated using Git workflows and co-authored commits, demonstrating effective teamwork in a shared codebase. The work leveraged skills in C programming, data structures, and embedded systems, resulting in a targeted feature addition that addressed data access needs without introducing new bugs during the development period.