Xiaofei Du worked on instill-core, focusing on improving documentation accuracy and streamlining CI/CD processes. They updated the README.md to ensure all documentation URLs pointed to the current site, enhancing discoverability for both developers and users. Xiaofei also removed an outdated CI workflow file, simplifying the repository’s CI configuration and reducing ongoing maintenance. Their work leveraged skills in repository management, CI/CD, and documentation, using Markdown and YAML to implement the changes. The updates addressed the need for accurate, easily accessible documentation and a cleaner CI environment, reflecting a targeted approach to repository hygiene within a short, focused development period.