diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -455,6 +455,7 @@
     'DifferentialCommitMessageParser' => 'applications/differential/parser/DifferentialCommitMessageParser.php',
     'DifferentialCommitMessageParserTestCase' => 'applications/differential/parser/__tests__/DifferentialCommitMessageParserTestCase.php',
     'DifferentialCommitsField' => 'applications/differential/customfield/DifferentialCommitsField.php',
+    'DifferentialCommitsSearchEngineAttachment' => 'applications/differential/engineextension/DifferentialCommitsSearchEngineAttachment.php',
     'DifferentialConduitAPIMethod' => 'applications/differential/conduit/DifferentialConduitAPIMethod.php',
     'DifferentialConflictsCommitMessageField' => 'applications/differential/field/DifferentialConflictsCommitMessageField.php',
     'DifferentialController' => 'applications/differential/controller/DifferentialController.php',
@@ -5733,6 +5734,7 @@
     'DifferentialCommitMessageParser' => 'Phobject',
     'DifferentialCommitMessageParserTestCase' => 'PhabricatorTestCase',
     'DifferentialCommitsField' => 'DifferentialCustomField',
+    'DifferentialCommitsSearchEngineAttachment' => 'PhabricatorSearchEngineAttachment',
     'DifferentialConduitAPIMethod' => 'ConduitAPIMethod',
     'DifferentialConflictsCommitMessageField' => 'DifferentialCommitMessageField',
     'DifferentialController' => 'PhabricatorController',
diff --git a/src/applications/differential/engineextension/DifferentialCommitsSearchEngineAttachment.php b/src/applications/differential/engineextension/DifferentialCommitsSearchEngineAttachment.php
new file mode 100644
--- /dev/null
+++ b/src/applications/differential/engineextension/DifferentialCommitsSearchEngineAttachment.php
@@ -0,0 +1,77 @@
+<?php
+
+final class DifferentialCommitsSearchEngineAttachment
+  extends PhabricatorSearchEngineAttachment {
+
+  public function getAttachmentName() {
+    return pht('Diff Commits');
+  }
+
+  public function getAttachmentDescription() {
+    return pht('Get the local commits (if any) for each diff.');
+  }
+
+  public function loadAttachmentData(array $objects, $spec) {
+    $properties = id(new DifferentialDiffProperty())->loadAllWhere(
+      'diffID IN (%Ld) AND name = %s',
+      mpull($objects, 'getID'),
+      'local:commits');
+
+    $map = array();
+    foreach ($properties as $property) {
+      $map[$property->getDiffID()] = $property->getData();
+    }
+
+    return $map;
+  }
+
+  public function getAttachmentForObject($object, $data, $spec) {
+    $diff_id = $object->getID();
+    $info = idx($data, $diff_id, array());
+
+    // NOTE: This should be similar to the information returned about commits
+    // by "diffusion.commit.search".
+
+    $list = array();
+    foreach ($info as $commit) {
+      $author_epoch = idx($commit, 'time');
+      if ($author_epoch) {
+        $author_epoch = (int)$author_epoch;
+      }
+
+      // TODO: Currently, we don't upload the raw author string from "arc".
+      // Reconstruct a plausible version of it until we begin uploading this
+      // information.
+
+      $author_name = idx($commit, 'author');
+      $author_email = idx($commit, 'authorEmail');
+      if (strlen($author_name) && strlen($author_email)) {
+        $author_raw = (string)id(new PhutilEmailAddress())
+          ->setDisplayName($author_name)
+          ->setAddress($author_email);
+      } else if (strlen($author_email)) {
+        $author_raw = $author_email;
+      } else {
+        $author_raw = $author_name;
+      }
+
+      $list[] = array(
+        'identifier' => $commit['commit'],
+        'tree' => idx($commit, 'tree'),
+        'parents' => idx($commit, 'parents', array()),
+        'author' => array(
+          'name' => $author_name,
+          'email' => $author_email,
+          'raw' => $author_raw,
+          'epoch' => $author_epoch,
+        ),
+        'message' => idx($commit, 'message'),
+      );
+    }
+
+    return array(
+      'commits' => $list,
+    );
+  }
+
+}
diff --git a/src/applications/differential/storage/DifferentialDiff.php b/src/applications/differential/storage/DifferentialDiff.php
--- a/src/applications/differential/storage/DifferentialDiff.php
+++ b/src/applications/differential/storage/DifferentialDiff.php
@@ -815,7 +815,10 @@
   }
 
   public function getConduitSearchAttachments() {
-    return array();
+    return array(
+      id(new DifferentialCommitsSearchEngineAttachment())
+        ->setAttachmentKey('commits'),
+    );
   }
 
 
diff --git a/src/applications/repository/storage/PhabricatorRepositoryCommit.php b/src/applications/repository/storage/PhabricatorRepositoryCommit.php
--- a/src/applications/repository/storage/PhabricatorRepositoryCommit.php
+++ b/src/applications/repository/storage/PhabricatorRepositoryCommit.php
@@ -716,6 +716,10 @@
   }
 
   public function getFieldValuesForConduit() {
+
+    // NOTE: This data should be similar to the information returned about
+    // commmits by "differential.diff.search" with the "commits" attachment.
+
     return array(
       'identifier' => $this->getCommitIdentifier(),
     );