Worked on stabilizing editor selection behavior in the zed-industries/zed repository, focusing on resolving inconsistencies between SelectPrevious and SelectNext actions. Addressed this by introducing a centralized selection logic function, select_match_ranges, which reduced code duplication and clarified edge-case handling. Utilized Rust for both editor development and comprehensive unit testing, ensuring that the new logic was robust and future-proof. The targeted bug fix improved user experience by making selection behavior more predictable and easier to maintain. Enhanced test coverage validated the changes and established a stronger baseline for future development, supporting safer refactoring and reducing the risk of regressions.