Worked on the apple/axlearn repository to address a compatibility issue affecting Git branch detection in development and CI workflows. Focused on maintaining workflow stability, the developer fixed a bug that prevented reliable branch retrieval on older Git versions by replacing the use of 'branch --show-current' with 'rev-parse'. This adjustment ensured that automation and CI processes could consistently determine the current branch, regardless of the underlying Git version. The work demonstrated careful attention to cross-version compatibility and maintenance, utilizing Python scripting, git, and unit testing to validate the solution and keep axlearn’s development environment resilient across diverse setups.