There's a new, separate repo for Nomen specifications, and it's modeled after NIPs. They're called NOMs. I have opened a PR for a new NOM that allows indexers to publish their name data to relays, so that clients don't need to make external (or potentially proprietary) API calls to query names. I would love feedback if any of you have interest in Nomen development:

GitHub

NOM-04: relay-published indexes by ursuscamp · Pull Request #1 · ursuscamp/noms