As I am experimenting with appstream-generator, I found the path structure inconvinient.

appstream-generator concat section and architecture. Which enforces the path section/architecture/os - and I found no way to customize this. In rpm world, we use just $section-$version-$arch. E.g. fedora-36-x86_64, fedora-rawhide-s390x.

I tried to workaround it by specifying . as architecture which resulted in fedora/./ which is a valid pathname for path fedora/ but appstream-generator fails to use such a path.