During December 2025, Chun Zhang focused on enhancing the dataset component within the pinterest/ray repository by improving documentation and code quality. He revised the Dataset class documentation to provide clearer guidance for users and contributors, addressing issues such as typos and redundant wording in code comments. Utilizing Python and applying best practices in code refactoring and documentation, Chun streamlined in-code comments to boost readability and maintainability. These updates aimed to facilitate onboarding for new developers and reinforce the reliability of the data pipeline. The work demonstrated attention to detail and contributed to a more productive development environment for the project.