diff --git a/src/applications/differential/engine/DifferentialDiffExtractionEngine.php b/src/applications/differential/engine/DifferentialDiffExtractionEngine.php
--- a/src/applications/differential/engine/DifferentialDiffExtractionEngine.php
+++ b/src/applications/differential/engine/DifferentialDiffExtractionEngine.php
@@ -284,7 +284,8 @@
       ->setTransactionType($type_update)
       ->setIgnoreOnNoEffect(true)
       ->setNewValue($new_diff->getPHID())
-      ->setMetadataValue('isCommitUpdate', true);
+      ->setMetadataValue('isCommitUpdate', true)
+      ->setMetadataValue('commitPHIDs', array($commit->getPHID()));
 
     foreach ($more_xactions as $more_xaction) {
       $xactions[] = $more_xaction;
diff --git a/src/applications/differential/xaction/DifferentialRevisionCloseTransaction.php b/src/applications/differential/xaction/DifferentialRevisionCloseTransaction.php
--- a/src/applications/differential/xaction/DifferentialRevisionCloseTransaction.php
+++ b/src/applications/differential/xaction/DifferentialRevisionCloseTransaction.php
@@ -136,4 +136,23 @@
       $this->renderObject());
   }
 
+  public function getTransactionTypeForConduit($xaction) {
+    return 'close';
+  }
+
+  public function getFieldValuesForConduit($object, $data) {
+    $commit_phid = $object->getMetadataValue('commitPHID');
+
+    if ($commit_phid) {
+      $commit_phids = array($commit_phid);
+    } else {
+      $commit_phids = array();
+    }
+
+    return array(
+      'commitPHIDs' => $commit_phids,
+    );
+  }
+
+
 }
diff --git a/src/applications/differential/xaction/DifferentialRevisionUpdateTransaction.php b/src/applications/differential/xaction/DifferentialRevisionUpdateTransaction.php
--- a/src/applications/differential/xaction/DifferentialRevisionUpdateTransaction.php
+++ b/src/applications/differential/xaction/DifferentialRevisionUpdateTransaction.php
@@ -182,4 +182,18 @@
     }
   }
 
+  public function getTransactionTypeForConduit($xaction) {
+    return 'update';
+  }
+
+  public function getFieldValuesForConduit($object, $data) {
+    $commit_phids = $object->getMetadataValue('commitPHIDs', array());
+
+    return array(
+      'old' => $object->getOldValue(),
+      'new' => $object->getNewValue(),
+      'commitPHIDs' => $commit_phids,
+    );
+  }
+
 }