Worked on the godotengine/godot repository to improve the reliability of the GDScript editor’s code completion, specifically addressing a bug where double carets were inserted during NodePath handling. Applied targeted code refactoring in C++ and GDScript to enhance readability and maintainability while introducing safety checks to guard against edge-case regressions. Developed and integrated unit tests to ensure the double caret issue would not reoccur, focusing on regression protection without altering existing APIs. The work emphasized quality improvement through careful, minimal changes, leveraging skills in code refactoring and unit testing to deliver a more robust and maintainable code completion experience.