Worked on the gui-cs/Terminal.Gui repository to enhance window sizing functionality for ARM64 platforms, specifically targeting macOS and FreeBSD environments. Developed and integrated an ARM64-specific ioctl function in C#, refactoring the existing logic to centralize and stabilize ioctl usage across these systems. This approach improved the reliability of terminal application window sizing and reduced layout inconsistencies on ARM64 devices. Focused on cross-platform development and system programming, the work also included strengthening maintainability by improving test coverage and preparing the codebase for future ARM64 enhancements, ensuring more robust support for terminal applications on diverse operating systems.