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
@@ -226,6 +226,7 @@
     'BulkRemarkupParameterType' => 'applications/transactions/bulk/type/BulkRemarkupParameterType.php',
     'BulkSelectParameterType' => 'applications/transactions/bulk/type/BulkSelectParameterType.php',
     'BulkStringParameterType' => 'applications/transactions/bulk/type/BulkStringParameterType.php',
+    'BulkTokenizerParameterType' => 'applications/transactions/bulk/type/BulkTokenizerParameterType.php',
     'CalendarTimeUtil' => 'applications/calendar/util/CalendarTimeUtil.php',
     'CalendarTimeUtilTestCase' => 'applications/calendar/__tests__/CalendarTimeUtilTestCase.php',
     'CelerityAPI' => 'applications/celerity/CelerityAPI.php',
@@ -5249,6 +5250,7 @@
     'BulkRemarkupParameterType' => 'BulkParameterType',
     'BulkSelectParameterType' => 'BulkParameterType',
     'BulkStringParameterType' => 'BulkParameterType',
+    'BulkTokenizerParameterType' => 'BulkParameterType',
     'CalendarTimeUtil' => 'Phobject',
     'CalendarTimeUtilTestCase' => 'PhabricatorTestCase',
     'CelerityAPI' => 'Phobject',
diff --git a/src/applications/project/engineextension/PhabricatorProjectsEditEngineExtension.php b/src/applications/project/engineextension/PhabricatorProjectsEditEngineExtension.php
--- a/src/applications/project/engineextension/PhabricatorProjectsEditEngineExtension.php
+++ b/src/applications/project/engineextension/PhabricatorProjectsEditEngineExtension.php
@@ -46,6 +46,8 @@
       $project_phids = array();
     }
 
+    $viewer = $engine->getViewer();
+
     $projects_field = id(new PhabricatorProjectsEditField())
       ->setKey('projectPHIDs')
       ->setLabel(pht('Tags'))
@@ -58,9 +60,11 @@
       ->setDescription(pht('Select project tags for the object.'))
       ->setTransactionType($edge_type)
       ->setMetadataValue('edge:type', $project_edge_type)
-      ->setValue($project_phids);
+      ->setValue($project_phids)
+      ->setViewer($viewer);
 
-    $projects_field->setViewer($engine->getViewer());
+    $projects_datasource = id(new PhabricatorProjectDatasource())
+      ->setViewer($viewer);
 
     $edit_add = $projects_field->getConduitEditType(self::EDITKEY_ADD)
       ->setConduitDescription(pht('Add project tags.'));
@@ -72,6 +76,18 @@
     $edit_rem = $projects_field->getConduitEditType(self::EDITKEY_REMOVE)
       ->setConduitDescription(pht('Remove project tags.'));
 
+    $projects_field->getBulkEditType(self::EDITKEY_ADD)
+      ->setBulkEditLabel(pht('Add project tags'))
+      ->setDatasource($projects_datasource);
+
+    $projects_field->getBulkEditType(self::EDITKEY_SET)
+      ->setBulkEditLabel(pht('Set project tags to'))
+      ->setDatasource($projects_datasource);
+
+    $projects_field->getBulkEditType(self::EDITKEY_REMOVE)
+      ->setBulkEditLabel(pht('Remove project tags'))
+      ->setDatasource($projects_datasource);
+
     return array(
       $projects_field,
     );
diff --git a/src/applications/subscriptions/engineextension/PhabricatorSubscriptionsEditEngineExtension.php b/src/applications/subscriptions/engineextension/PhabricatorSubscriptionsEditEngineExtension.php
--- a/src/applications/subscriptions/engineextension/PhabricatorSubscriptionsEditEngineExtension.php
+++ b/src/applications/subscriptions/engineextension/PhabricatorSubscriptionsEditEngineExtension.php
@@ -42,6 +42,8 @@
       $sub_phids = array();
     }
 
+    $viewer = $engine->getViewer();
+
     $subscribers_field = id(new PhabricatorSubscribersEditField())
       ->setKey(self::FIELDKEY)
       ->setLabel(pht('Subscribers'))
@@ -53,9 +55,11 @@
       ->setCommentActionOrder(9000)
       ->setDescription(pht('Choose subscribers.'))
       ->setTransactionType($subscribers_type)
-      ->setValue($sub_phids);
+      ->setValue($sub_phids)
+      ->setViewer($viewer);
 
-    $subscribers_field->setViewer($engine->getViewer());
+    $subscriber_datasource = id(new PhabricatorMetaMTAMailableDatasource())
+      ->setViewer($viewer);
 
     $edit_add = $subscribers_field->getConduitEditType(self::EDITKEY_ADD)
       ->setConduitDescription(pht('Add subscribers.'));
@@ -67,6 +71,18 @@
     $edit_rem = $subscribers_field->getConduitEditType(self::EDITKEY_REMOVE)
       ->setConduitDescription(pht('Remove subscribers.'));
 
+    $subscribers_field->getBulkEditType(self::EDITKEY_ADD)
+      ->setBulkEditLabel(pht('Add subscribers'))
+      ->setDatasource($subscriber_datasource);
+
+    $subscribers_field->getBulkEditType(self::EDITKEY_SET)
+      ->setBulkEditLabel(pht('Set subscribers to'))
+      ->setDatasource($subscriber_datasource);
+
+    $subscribers_field->getBulkEditType(self::EDITKEY_REMOVE)
+      ->setBulkEditLabel(pht('Remove subscribers'))
+      ->setDatasource($subscriber_datasource);
+
     return array(
       $subscribers_field,
     );
diff --git a/src/applications/transactions/bulk/PhabricatorEditEngineBulkJobType.php b/src/applications/transactions/bulk/PhabricatorEditEngineBulkJobType.php
--- a/src/applications/transactions/bulk/PhabricatorEditEngineBulkJobType.php
+++ b/src/applications/transactions/bulk/PhabricatorEditEngineBulkJobType.php
@@ -82,6 +82,12 @@
         $xaction->attachComment($comment);
       }
 
+      if (isset($raw_xaction['metadata'])) {
+        foreach ($raw_xaction['metadata'] as $meta_key => $meta_value) {
+          $xaction->setMetadataValue($meta_key, $meta_value);
+        }
+      }
+
       $xactions[] = $xaction;
     }
 
diff --git a/src/applications/transactions/bulk/type/BulkTokenizerParameterType.php b/src/applications/transactions/bulk/type/BulkTokenizerParameterType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/transactions/bulk/type/BulkTokenizerParameterType.php
@@ -0,0 +1,40 @@
+<?php
+
+final class BulkTokenizerParameterType
+  extends BulkParameterType {
+
+  private $datasource;
+
+  public function setDatasource(PhabricatorTypeaheadDatasource $datasource) {
+    $this->datasource = $datasource;
+    return $this;
+  }
+
+  public function getDatasource() {
+    return $this->datasource;
+  }
+
+  public function getPHUIXControlType() {
+    return 'tokenizer';
+  }
+
+  public function getPHUIXControlSpecification() {
+    $template = new AphrontTokenizerTemplateView();
+    $template_markup = $template->render();
+
+    $datasource = $this->getDatasource();
+    $limit = null;
+
+    return array(
+      'markup' => (string)hsprintf('%s', $template_markup),
+      'config' => array(
+        'src' => $datasource->getDatasourceURI(),
+        'browseURI' => $datasource->getBrowseURI(),
+        'placeholder' => $datasource->getPlaceholderText(),
+        'limit' => $limit,
+      ),
+      'value' => null,
+    );
+  }
+
+}
diff --git a/src/applications/transactions/editengine/PhabricatorEditEngine.php b/src/applications/transactions/editengine/PhabricatorEditEngine.php
--- a/src/applications/transactions/editengine/PhabricatorEditEngine.php
+++ b/src/applications/transactions/editengine/PhabricatorEditEngine.php
@@ -2498,6 +2498,8 @@
       // but it's possible that this isn't the case.
       $xaction['type'] = $edit_type->getTransactionType();
 
+      $xaction['metadata'] = $edit_type->getMetadata();
+
       $xaction = $edit_type->newRawBulkTransaction($xaction);
       if ($xaction === null) {
         unset($xactions[$key]);
diff --git a/src/applications/transactions/editfield/PhabricatorEditField.php b/src/applications/transactions/editfield/PhabricatorEditField.php
--- a/src/applications/transactions/editfield/PhabricatorEditField.php
+++ b/src/applications/transactions/editfield/PhabricatorEditField.php
@@ -769,6 +769,19 @@
     return $this->bulkEditTypes;
   }
 
+  final public function getBulkEditType($key) {
+    $edit_types = $this->getBulkEditTypes();
+
+    if (empty($edit_types[$key])) {
+      throw new Exception(
+        pht(
+          'This EditField does not provide a Bulk EditType with key "%s".',
+          $key));
+    }
+
+    return $edit_types[$key];
+  }
+
   protected function newBulkEditTypes() {
     $edit_type = $this->getEditType();
 
diff --git a/src/applications/transactions/edittype/PhabricatorEdgeEditType.php b/src/applications/transactions/edittype/PhabricatorEdgeEditType.php
--- a/src/applications/transactions/edittype/PhabricatorEdgeEditType.php
+++ b/src/applications/transactions/edittype/PhabricatorEdgeEditType.php
@@ -34,4 +34,28 @@
     return array($xaction);
   }
 
+  protected function newBulkParameterType() {
+    if (!$this->getDatasource()) {
+      return null;
+    }
+
+    return id(new BulkTokenizerParameterType())
+      ->setDatasource($this->getDatasource());
+  }
+
+
+  public function newRawBulkTransaction(array $xaction) {
+    $value = idx($xaction, 'value');
+
+    if ($this->getEdgeOperation() !== null) {
+      $value = array_fuse($value);
+      $value = array(
+        $this->getEdgeOperation() => $value,
+      );
+      $xaction['value'] = $value;
+    }
+
+    return $xaction;
+  }
+
 }