The terminal (dill), HTTP server (eyre), socket UDP layer (ames), and shell (batz) are really expressed using the language in the spec. The filesystem (clay) has a reflection in your unix filesystem, but it's also really clay. In a very real way, even if they are not fully expressed by the Nock spec, they are built using the primitives that are entirely laid out there in Nock 5K. Hoon compiles to nock.
I feel like I'm trying to argue against "no true scotsman" but I don't know how else I'm going to convince you that the code "is really from mars," which seems to be what I want to tell you whether or not it's what you're really asking here.