Currently it looks like only Xcode 26 is capable of producing the Assets.car file which is required for applications on macOS to use the new Liquid Glass icon format.

Hence, this is a blank macOS app Xcode project, with only the LG icons added.

We extract the Assets.car file by building the application and grabbing it from Contents/Resources within the built EmacsLG application.

The *.icon Icon Composer documents within the Xcode project are duplicates of those in the top-level Icons directory.