I think he just means that you should add an autodiscovery link tag pointing to your RSS feed URL. Then it will automatically be picked up by RSS readers. See https://www.rssboard.org/rss-autodiscovery.
As unnecessarily snarky as this person is being with you, don't let a HackerNews comment stop you from being an great person.
As unnecessarily snarky as this person is being with you, don't let a HackerNews comment stop you from being an great person.