Worked on improving the reliability of WebDAV directory listings in the koreader/koreader repository, focusing on backend development and API accuracy. Addressed a bug that caused incorrect detection of the current directory by refining the comparison logic to use the trimmed WebDAV URL path, which enhanced the correctness of directory listings for users accessing files over the network. Utilized Lua to implement and test the fix, ensuring that directory navigation reflected the actual server state and reduced user confusion. Demonstrated strong debugging skills and attention to code quality by linking the patch directly to the relevant issue and following best practices for maintainability.