These instructions don’t appear to be documented. Here’s a post from a bit while ago that covers the basic functions of participating on Lemmy via Mastodon mentions.

  • You can create anything that abides by the spec and it should somewhat work. However, Lemmy won’t know what to do with a stream of Location objects and Mastodon won’t know how to deal with replies on a calendar event. Most of the Fediverse maps their functionality onto a subset of the protocol that’s implemented by most other servers.

    There’s absolutely nothing stopping you from creating a Fediverse LinkedIn that can work together with the rest of the Fediverse. Same with a federated 4chan or a federated review website. The spec is quite open ended. The challenge is finding enough people willing to join your server, and moderating the initial servers. That last part is mostly unsolved because only a sliver of the population wants to moderate and with no clear direction from above, having a solid moderation policy is effectively impossible.