Hey Thanks for reading, and I'm glad you found it interesting.

To my understanding, Webfinger provides a standard API for discovering the user profile details no matter the software running on the node.

For example,

$ curl https://programming.dev/.well-known/webfinger\?resource\=acct:snowe@programming.dev | jq
{
  "subject": "acct:snowe@programming.dev",
  "links": [
    {
      "rel": "http://webfinger.net/rel/profile-page",
      "type": "text/html",
      "href": "https://programming.dev/u/snowe"
    },
    {
      "rel": "self",
      "type": "application/activity+json",
      "href": "https://programming.dev/u/snowe",
      "properties": {
        "https://www.w3.org/ns/activitystreams#type": "Person"
      }
    }
  ]
}