During December 2024, Iain contributed to the ghostty-org/ghostty repository by enhancing both user interface consistency and backend reliability. He repositioned the 'New Tab' button in accordance with GNOME Human Interface Guidelines and implemented dark window decorations that adapt to user theme preferences, improving visual coherence. On the backend, Iain addressed correctness in GTK version comparison logic by refining the atLeast() function to handle major, minor, and micro versions accurately. He expanded unit test coverage and refactored test code for clarity, using Zig and GTK development skills to ensure robust version checks and maintainable, reliable release processes.