Index: src/applications/herald/adapter/HeraldAdapter.php
===================================================================
--- src/applications/herald/adapter/HeraldAdapter.php
+++ src/applications/herald/adapter/HeraldAdapter.php
@@ -8,6 +8,7 @@
   const FIELD_TITLE                  = 'title';
   const FIELD_BODY                   = 'body';
   const FIELD_AUTHOR                 = 'author';
+  const FIELD_ASSIGNEE               = 'assignee';
   const FIELD_REVIEWER               = 'reviewer';
   const FIELD_REVIEWERS              = 'reviewers';
   const FIELD_COMMITTER              = 'committer';
@@ -150,6 +151,7 @@
       self::FIELD_TITLE => pht('Title'),
       self::FIELD_BODY => pht('Body'),
       self::FIELD_AUTHOR => pht('Author'),
+      self::FIELD_ASSIGNEE => pht('Assignee'),
       self::FIELD_COMMITTER => pht('Committer'),
       self::FIELD_REVIEWER => pht('Reviewer'),
       self::FIELD_REVIEWERS => pht('Reviewers'),
@@ -230,6 +232,7 @@
           self::CONDITION_IS_NOT_ANY,
         );
       case self::FIELD_REPOSITORY:
+      case self::FIELD_ASSIGNEE:
         return array(
           self::CONDITION_IS_ANY,
           self::CONDITION_IS_NOT_ANY,
Index: src/applications/herald/adapter/HeraldManiphestTaskAdapter.php
===================================================================
--- src/applications/herald/adapter/HeraldManiphestTaskAdapter.php
+++ src/applications/herald/adapter/HeraldManiphestTaskAdapter.php
@@ -60,6 +60,7 @@
         self::FIELD_TITLE,
         self::FIELD_BODY,
         self::FIELD_AUTHOR,
+        self::FIELD_ASSIGNEE,
         self::FIELD_CC,
         self::FIELD_CONTENT_SOURCE,
         self::FIELD_PROJECTS,
@@ -102,6 +103,8 @@
         return $this->getTask()->getDescription();
       case self::FIELD_AUTHOR:
         return $this->getTask()->getAuthorPHID();
+      case self::FIELD_ASSIGNEE:
+        return $this->getTask()->getOwnerPHID();
       case self::FIELD_CC:
         return $this->getTask()->getCCPHIDs();
       case self::FIELD_PROJECTS:
Index: src/applications/herald/storage/HeraldRule.php
===================================================================
--- src/applications/herald/storage/HeraldRule.php
+++ src/applications/herald/storage/HeraldRule.php
@@ -16,7 +16,7 @@
   protected $ruleType;
   protected $isDisabled = 0;
 
-  protected $configVersion = 19;
+  protected $configVersion = 20;
 
   // phids for which this rule has been applied
   private $ruleApplied = self::ATTACHABLE;