During September 2025, Zekai Li focused on improving the API documentation for the modelcontextprotocol/servers repository. He addressed a documentation issue by removing a duplicate entry for the directory_tree tool, ensuring the documentation accurately reflected the available toolset and reducing potential confusion for users. His work involved careful review and editing of Markdown files, applying his skills in API design, documentation, and technical writing. Although the scope was limited to a single bug fix rather than new feature development, the update contributed to clearer communication for developers and users interacting with the API, demonstrating attention to detail and documentation quality.