Jonatan developed terminal screen buffer switching for the ghostty-org/ghostty repository, focusing on implementing Alt Screen Legacy Mode to enable seamless toggling between alternate and primary terminal screens. Using Zig, he introduced support for legacy CSI sequences, specifically handling CSI ? 47 h/l, to improve compatibility with terminal applications that rely on these features. His work centered on screen management and terminal development, laying the foundation for more robust terminal emulation. Although no major bugs were fixed during this period, the feature enhanced user experience by reducing friction in terminal workflows and extending the terminal’s capabilities for future enhancements.