During April 2026, Haowei Huang developed a safety feature for sysfs attribute group management in the DragonOS-Community/DragonOS repository. Focusing on filesystem and kernel development using Rust, Haowei implemented the group_remove_files function to enable safe removal of attribute groups within sysfs. This approach ensured that group directories were properly deleted while preventing accidental removal of sibling directories, thereby maintaining filesystem integrity and reducing the risk of unintended data loss during device tree and attribute group updates. The work demonstrated careful attention to cleanup logic and code maintainability, with clear commit messages and sign-offs to support efficient code review processes.