Worked on the google/orbax repository to refactor checkpoint preservation policy within the CheckpointManager module. Centralized the logic for determining which checkpoints to retain, removing deprecated options and adopting a new, policy-driven retention approach. This update, implemented in Python, focused on improving maintainability and clarity of checkpoint management across different environments. The work leveraged skills in API design, checkpoint management, and code refactoring to lay the foundation for future policy-driven retention reporting. By streamlining the preservation logic, the changes enabled clearer retention decisions and simplified ongoing maintenance, ensuring that the codebase remains adaptable to evolving requirements and best practices.