diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -392,7 +392,7 @@
     'rsrc/js/application/files/behavior-icon-composer.js' => '8ef9ab58',
     'rsrc/js/application/files/behavior-launch-icon-composer.js' => '48086888',
     'rsrc/js/application/harbormaster/behavior-reorder-steps.js' => 'b716477f',
-    'rsrc/js/application/herald/HeraldRuleEditor.js' => '58e048fc',
+    'rsrc/js/application/herald/HeraldRuleEditor.js' => '3fc2c8f2',
     'rsrc/js/application/herald/PathTypeahead.js' => 'f7fc67ec',
     'rsrc/js/application/herald/herald-rule-editor.js' => '7ebaeed3',
     'rsrc/js/application/maniphest/behavior-batch-editor.js' => 'f588412e',
@@ -543,7 +543,7 @@
     'global-drag-and-drop-css' => '697324ad',
     'harbormaster-css' => 'cec833b7',
     'herald-css' => 'c544dd1c',
-    'herald-rule-editor' => '58e048fc',
+    'herald-rule-editor' => '3fc2c8f2',
     'herald-test-css' => '778b008e',
     'inline-comment-summary-css' => '8cfd34e8',
     'javelin-aphlict' => '4a07e8e3',
@@ -1103,6 +1103,15 @@
       2 => 'javelin-stratcom',
       3 => 'phabricator-tooltip',
     ),
+    '3fc2c8f2' => array(
+      0 => 'multirow-row-manager',
+      1 => 'javelin-install',
+      2 => 'javelin-util',
+      3 => 'javelin-dom',
+      4 => 'javelin-stratcom',
+      5 => 'javelin-json',
+      6 => 'phabricator-prefab',
+    ),
     '40a6a403' => array(
       0 => 'javelin-install',
       1 => 'javelin-dom',
@@ -1199,15 +1208,6 @@
       2 => 'javelin-vector',
       3 => 'javelin-dom',
     ),
-    '58e048fc' => array(
-      0 => 'multirow-row-manager',
-      1 => 'javelin-install',
-      2 => 'javelin-util',
-      3 => 'javelin-dom',
-      4 => 'javelin-stratcom',
-      5 => 'javelin-json',
-      6 => 'phabricator-prefab',
-    ),
     '58f7803f' => array(
       0 => 'javelin-behavior',
       1 => 'javelin-aphlict',
diff --git a/src/applications/herald/controller/HeraldRuleController.php b/src/applications/herald/controller/HeraldRuleController.php
--- a/src/applications/herald/controller/HeraldRuleController.php
+++ b/src/applications/herald/controller/HeraldRuleController.php
@@ -601,7 +601,12 @@
       'userorproject' => new PhabricatorProjectOrUserDatasource(),
     );
 
-    $sources = mpull($sources, 'getDatasourceURI');
+    foreach ($sources as $key => $source) {
+      $sources[$key] = array(
+        'uri' => $source->getDatasourceURI(),
+        'placeholder' => $source->getPlaceholderText(),
+      );
+    }
 
     return array(
       'source' => $sources,
diff --git a/webroot/rsrc/js/application/herald/HeraldRuleEditor.js b/webroot/rsrc/js/application/herald/HeraldRuleEditor.js
--- a/webroot/rsrc/js/application/herald/HeraldRuleEditor.js
+++ b/webroot/rsrc/js/application/herald/HeraldRuleEditor.js
@@ -283,7 +283,8 @@
 
       var tokenizerConfig = {
         root : template,
-        src : this._config.template.source[type],
+        src : this._config.template.source[type].uri,
+        placeholder: this._config.template.source[type].placeholder,
         icons : this._config.template.icons,
         username : this._config.username
       };