Worked on the aseprite/aseprite repository to enhance code safety and input reliability within the editor’s UI components. Focused on improving entry handling by introducing const-correctness to critical getter methods, ensuring that state remains unmodified during read operations. Developed a new function to accurately compute the caret’s screen coordinates, which supports more reliable IME and caret positioning for multilingual input scenarios. Addressed issues with input mode activation, particularly when focusing or using dead keys, to stabilize text entry workflows. Utilized C++ for software and widget development, applying careful software design principles to reduce unintended state changes and improve usability.