Index: src/routes/activitypub.js
===================================================================
--- src/routes/activitypub.js	(revision f1c50f9e8909d1873e736e05e5b2cb0c167154ba)
+++ src/routes/activitypub.js	(revision 97bacf2bd1fa5c118355c94e36492a020d61d024)
@@ -162,4 +162,7 @@
       // client renders their images/audio like own outbox posts.
       attachment: AP.timelineAttachments(t.media_json),
+      // FEP-9098 custom emojis: the note's Emoji tags, so the client can
+      // render :shortcode: as an image instead of literal text.
+      tag: AP.timelineEmojis(t.emoji_json),
     },
   }));