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Social & federation

Cairn includes a full social layer:

  • Follow other users and see their activities in your feed.
  • Profiles with public/follower/private visibility.
  • Kudos and comments on activities.
  • Clubs with membership and moderation tools.
  • Sharing via unguessable share links for individual activities.

Visibility​

Every non-owner read goes through a single visibility choke-point. Owners see their own activities directly; everyone else sees only what your visibility settings project to them. This keeps private data private regardless of which endpoint is used.

ActivityPub federation (optional, beta)​

:::caution Beta Federation is currently beta: the protocol surface and remote-instance compatibility may still change between releases. Expect rough edges before enabling it on an instance you care about. :::

Enable CAIRN_FEDERATION_ENABLED to let your instance federate over ActivityPub — follow and be followed across Cairn (and other compatible) instances. It's off by default.