sakaru [1] filed a deletion request for faiss-echo-git [2]: Doesn't build due to empty depends, since 2016. I would also argue it fails the usefulness test. Also is packages an upstream binary instead of compiling.
[1] https://aur.archlinux.org/account/sakaru/ [2] https://aur.archlinux.org/pkgbase/faiss-echo-git/
