diff --git a/src/applications/conpherence/storage/ConpherenceThread.php b/src/applications/conpherence/storage/ConpherenceThread.php
--- a/src/applications/conpherence/storage/ConpherenceThread.php
+++ b/src/applications/conpherence/storage/ConpherenceThread.php
@@ -4,6 +4,7 @@
   implements
     PhabricatorPolicyInterface,
     PhabricatorApplicationTransactionInterface,
+    PhabricatorMentionableInterface,
     PhabricatorDestructibleInterface {
 
   protected $title;
diff --git a/src/applications/conpherence/view/ConpherenceTransactionView.php b/src/applications/conpherence/view/ConpherenceTransactionView.php
--- a/src/applications/conpherence/view/ConpherenceTransactionView.php
+++ b/src/applications/conpherence/view/ConpherenceTransactionView.php
@@ -115,6 +115,7 @@
       case PhabricatorTransactions::TYPE_VIEW_POLICY:
       case PhabricatorTransactions::TYPE_EDIT_POLICY:
       case PhabricatorTransactions::TYPE_JOIN_POLICY:
+      case PhabricatorTransactions::TYPE_EDGE:
         $content = $transaction->getTitle();
         $transaction_view->addClass('conpherence-edited');
         break;
diff --git a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
--- a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
+++ b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
@@ -221,7 +221,8 @@
       $types[] = PhabricatorTransactions::TYPE_TOKEN;
     }
 
-    if ($this->object instanceof PhabricatorProjectInterface) {
+    if ($this->object instanceof PhabricatorProjectInterface ||
+        $this->object instanceof PhabricatorMentionableInterface) {
       $types[] = PhabricatorTransactions::TYPE_EDGE;
     }