Index: src/services/ActivityPubService.js
===================================================================
--- src/services/ActivityPubService.js	(revision 5c373b8e846c6510a176f2fa06bfe3e2b6753102)
+++ src/services/ActivityPubService.js	(revision e62f65d51ce6e100e8c44bd84a06c8731f893a03)
@@ -276,4 +276,5 @@
       // FEP-633c 5.2.1: a ward's call for help. Only ever on direct notes.
       ...Guardianship.helpRequestProps(post),
+      ...Guardianship.waveProps(post),
       tag: [
         ...mentionTags(post.content),
@@ -1515,8 +1516,9 @@
         // flag is stored so the Guardian PWA's message centre can list it.
         const help = Guardianship.isHelpRequest(o);
+        const wave = Guardianship.isWave(o);
         for (const slug of slugs) {
           try {
-            const r = db.prepare('INSERT OR IGNORE INTO ap_mentions (slug, object_uri, note_url, actor_uri, actor_name, actor_handle, actor_icon, actor_url, content, published, help_request, created_at) VALUES (?,?,?,?,?,?,?,?,?,?,?,CURRENT_TIMESTAMP)')
-              .run(slug, o.id, safeUrl(o.url) || null, actorUri, ai.name, ai.handle, ai.icon, ai.url, html, o.published || null, help ? 1 : 0);
+            const r = db.prepare('INSERT OR IGNORE INTO ap_mentions (slug, object_uri, note_url, actor_uri, actor_name, actor_handle, actor_icon, actor_url, content, published, help_request, wave, created_at) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,CURRENT_TIMESTAMP)')
+              .run(slug, o.id, safeUrl(o.url) || null, actorUri, ai.name, ai.handle, ai.icon, ai.url, html, o.published || null, help ? 1 : 0, wave ? 1 : 0);
             if (r.changes) {
               console.log('[AP] mention', actorUri, '→', slug, help ? '(help request)' : '');