tl;dr: Ghostty 1.4 ships 7 months of work from 172 contributors, including a 25-55% I/O throughput boost on macOS, transparent scrollback compression (70-90% memory reduction, default limit raised to 50MB), and the first 100% complete Kitty graphics protocol implementation outside Kitty itself (including animation). The release also adds a `ghostty +ssh` wrapper for remote terminfo setup, a new GTK rendering pipeline using EGL/DMABUF that fixes blurry fractional scaling, macOS 27 compatibility, and patches for 10+ security advisories including paste protection bypasses and Kitty graphics crashes.