During January 2025, Jadaytime focused on improving resource management in the swiftlang/swift-foundation repository, specifically addressing a bug in Windows file-mapping deallocation. By analyzing the interaction between File I/O and the Windows API, Jadaytime identified that the deallocator incorrectly used the mapped view pointer instead of the mapping handle when unmapping .alwaysMapped file mappings. The fix, implemented in Swift, ensures that resources are properly released, preventing leaks and enhancing application stability for Windows users. This targeted engineering work demonstrated a strong understanding of memory management and platform-specific APIs, resulting in more reliable file-mapping operations for downstream applications.