Worked on repository hygiene and documentation scaffolding for HWTeng-Teaching/202502-Statistics-II, establishing a clean foundation for future development. Focused on consolidating maintenance tasks by removing legacy artifacts and placeholder directories, which reduced technical debt and improved repository clarity. Created a comprehensive README.md to provide an overview and contribution guidelines, supporting onboarding and knowledge transfer. Sequenced commits to maintain a clear audit trail, enhancing maintainability and traceability. Utilized Git for version control and Markdown for documentation, ensuring the repository is well-structured for future expansion. The work prioritized clarity and maintainability, positioning the project for efficient documentation and contributor engagement.