[d-z-m]

I'm intentionally not using Kyber, the key xor only happens if you elect to use both.

It works just fine with McEliece only.

> You also don't need Go

You don't need any language in particular. That's the beauty of the .proto spec. Can generate some client(and server) code in whatever language you want(that protoc supports).

[rogers18445]

Do you have a reason to not use Kyber? The way it is combined should be sound.

[d-z-m]

Not in particular. Yes, the way they are combining them should be sound.