I like the remote helper for naddr1 codes, but can you replace the :// with : for consistency? Or maybe just do the naked naddr1 directly.
The git-remote-helper that takes stuff from Blossom could work (I don't think it is worth doing, but that's another matter), but it is somewhat out of the scope of NIP-34: it's just a new way of hosting git repos. We could add it there too if it turns out to be good.