Worked on the google/copybara repository to enhance rename detection during file migrations, focusing on preserving file history and improving automation. Developed new logic in Java to allow the RenameDetector to optionally consider filenames using Levenshtein distance, increasing detection accuracy for renamed files. Introduced filename-specific exceptions to better match files like LICENSE, even when names differ, and exposed a configurable similarity percentage flag for threshold tuning during glob generation. Applied skills in algorithm design, command line tools, and unit testing to address bug 516392780, resulting in more reliable, maintainable, and configurable rename detection across cross-repository migration workflows.