During July 2025, Junsheng Lu focused on stabilizing the configuration flow within the opensumi/core repository, addressing a persistent user-facing error related to configuration selection. By updating the selection logic to include the DEFAULT_NO_CONFIGURATION_KEY, Junsheng ensured that users selecting the 'No configuration' option would no longer encounter errors, thereby improving the reliability of the initial setup process. This targeted fix, implemented using TypeScript and front end development skills, reduced support issues stemming from misconfiguration. While the work centered on a single bug fix rather than new features, it demonstrated careful attention to user experience and robust handling of configuration logic.