> There is a way to use a Yubikey to decrypt Linux full-disk encryption. It relies on an abandoned personal GitHub project

Abandoned?

You do know luks supports FIDO, right?

Here's a small guide on how to do it: https://prose.bentopais.pt/setting-up-trezor-on-arch#luks-un...

You'll also find how to use your key to login to the tty, authenticate to sudo commands and much more.