During December 2025, Lyu Zongyuan focused on stabilizing the startup process for the ghostty-org/ghostty iOS application, addressing a persistent crash that affected user onboarding and compliance with Apple guidelines. Using Swift, Metal, and Zig, Lyu restructured the initialization sequence to ensure the ghostty library loaded before app launch, preventing null allocator issues. He also corrected CALayer handling by invoking addSublayer on the appropriate UIView layer, resolving animation bugs at startup. By enforcing shared storage mode, Lyu aligned the app with iOS requirements, resulting in a more reliable and compliant runtime. The work demonstrated careful debugging and targeted engineering.