Worked on the apple/axlearn repository to refactor the HuggingFace integration, focusing on improving maintainability and long-term stability. The main contribution involved extracting the HuggingFacePreTrainedBuilder into its own module, which enhanced code organization and established a clearer separation of concerns. This modular approach supports easier unit testing and reduces coupling, making future enhancements to HuggingFace workflows safer and more manageable. The work emphasized Python programming, module design, and refactoring patterns, with careful attention to Git best practices. No major bugs were addressed during this period, as the primary goal was to improve code quality and facilitate onboarding for new contributors.