The GhosttyKit xcframework previously shipped the entire include/ directory, which pulled in the libghostty-vt headers under include/ghostty/. Because those headers are not referenced from the ghostty.h umbrella, Clang's module system emitted "umbrella header for module 'GhosttyKit' does not include header 'ghostty/vt/*.h'" warnings in Xcode builds. Stage only ghostty.h and module.modulemap via addWriteFiles so the xcframework Headers directory contains exactly the GhosttyKit API, mirroring the pattern used in GhosttyLibVt.xcframework. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>