Autumn upgraded the Duperemove tool to version 0.15 within the chimera-linux/cports repository, focusing on modernizing the build system and refining dependency management. She migrated Duperemove to the user directory to streamline packaging and updates, implemented atomic progress counters for improved reliability, and removed the libbsd dependency to enhance portability. By switching the codebase to the C23 standard and adding xxhash-devel as a dependency, Autumn ensured future maintainability and compatibility. Working primarily in C and Python, she documented all changes thoroughly, delivering a release that reduces build-time issues and lays the groundwork for future optimizations without addressing major bugs.