During August 2025, Daniel Kim refactored the memory ownership tracking system for the rems-project/cn repository, focusing on dynamic allocation and range-based tracking. He redesigned the ownership state management to use linked-list data structures, enabling efficient handling of memory address ranges rather than individual addresses. This approach improved memory efficiency and clarified ownership state transitions, laying a scalable foundation for future enhancements. Daniel centralized range-scan logic to support range-based ownership queries and optimizations. His work demonstrated strong skills in C, system programming, and memory management, addressing core architectural challenges and enabling more robust and maintainable ownership tracking within the codebase.