Francisco Fernandes focused on stabilizing editor selection behavior in the zed-industries/zed repository, addressing a longstanding inconsistency between SelectPrevious and SelectNext actions. Using Rust, he centralized selection logic by introducing the select_match_ranges function, which reduced code duplication and clarified edge-case handling. He updated and expanded unit tests to validate the new logic, improving test reliability and coverage. This targeted bug fix enhanced the editor’s predictability for users and lowered future maintenance risks. Francisco’s work demonstrated depth in editor development and unit testing, resulting in cleaner, more maintainable code and a stronger foundation for future refactoring within the project.