@prologic maybe you meant to specify twtxt as a type similar to ActivityPub's application/activity+json in https://webfinger.net/lookup/?resource=sorenpeter@norrebro.space

    {
      "rel": "self",
      "type": "application/activity+json",
      "href": "https://norrebro.space/users/sorenpeter"
    },

Then it would also make sense to define a Link Relations but should that then link to something like https://twtxt.dev/webfinger.html where we can describe the spec?