During March 2025, Li Lei focused on backend stability for the open-webui/open-webui repository by addressing a critical issue in error logging. He identified and corrected the improper use of log.exception in Python, ensuring that error messages are now accurately captured in diagnostic logs. This targeted bug fix improved the clarity of debugging information and enhanced overall observability for the system. Li Lei applied his skills in backend development, error handling, and logging to validate the changes and maintain production safety. While the work was limited in scope, it demonstrated careful attention to detail and a methodical approach to system reliability.