Adding/removing "pinned statuses" to an actor

<p>Mastodon has a concept called "pinned statuses", which is a special collection attached to a Person actor.</p> <p><a href="https://docs.joinmastodon.org/spec/activitypub/#featured" rel="nofollow ugc">https://docs.joinmastodon.org/spec/activitypub/#featured</a></p> <p>It wasn't readily known how this collection is updated and federated (not without code achaeology), but <a href="https://social.sitedethib.com/@Claire">@<bdi>claire@social.sitedethib.com</bdi></a> recently shared some additional info :smiley:</p> <ul> <li>The actor itself will issue an <code>Add</code> activity targeting the collection with the status in <code>object</code>.</li> <li>This activity is sent to all followers of the actor.</li></ul>