diff --git a/src/applications/maniphest/editor/ManiphestTransactionEditor.php b/src/applications/maniphest/editor/ManiphestTransactionEditor.php
index d902594857..c2cd4455c8 100644
--- a/src/applications/maniphest/editor/ManiphestTransactionEditor.php
+++ b/src/applications/maniphest/editor/ManiphestTransactionEditor.php
@@ -1,675 +1,687 @@
 <?php
 
 final class ManiphestTransactionEditor
   extends PhabricatorApplicationTransactionEditor {
 
   private $heraldEmailPHIDs = array();
 
   public function getEditorApplicationClass() {
     return 'PhabricatorManiphestApplication';
   }
 
   public function getEditorObjectsDescription() {
     return pht('Maniphest Tasks');
   }
 
   public function getTransactionTypes() {
     $types = parent::getTransactionTypes();
 
     $types[] = PhabricatorTransactions::TYPE_COMMENT;
     $types[] = PhabricatorTransactions::TYPE_EDGE;
     $types[] = ManiphestTransaction::TYPE_PRIORITY;
     $types[] = ManiphestTransaction::TYPE_STATUS;
     $types[] = ManiphestTransaction::TYPE_TITLE;
     $types[] = ManiphestTransaction::TYPE_DESCRIPTION;
     $types[] = ManiphestTransaction::TYPE_OWNER;
     $types[] = ManiphestTransaction::TYPE_CCS;
     $types[] = ManiphestTransaction::TYPE_SUBPRIORITY;
     $types[] = ManiphestTransaction::TYPE_PROJECT_COLUMN;
+    $types[] = ManiphestTransaction::TYPE_MERGED_INTO;
+    $types[] = ManiphestTransaction::TYPE_MERGED_FROM;
     $types[] = ManiphestTransaction::TYPE_UNBLOCK;
     $types[] = PhabricatorTransactions::TYPE_VIEW_POLICY;
     $types[] = PhabricatorTransactions::TYPE_EDIT_POLICY;
 
     return $types;
   }
 
   protected function getCustomTransactionOldValue(
     PhabricatorLiskDAO $object,
     PhabricatorApplicationTransaction $xaction) {
 
     switch ($xaction->getTransactionType()) {
       case ManiphestTransaction::TYPE_PRIORITY:
         if ($this->getIsNewObject()) {
           return null;
         }
         return (int)$object->getPriority();
       case ManiphestTransaction::TYPE_STATUS:
         if ($this->getIsNewObject()) {
           return null;
         }
         return $object->getStatus();
       case ManiphestTransaction::TYPE_TITLE:
         if ($this->getIsNewObject()) {
           return null;
         }
         return $object->getTitle();
       case ManiphestTransaction::TYPE_DESCRIPTION:
         if ($this->getIsNewObject()) {
           return null;
         }
         return $object->getDescription();
       case ManiphestTransaction::TYPE_OWNER:
         return nonempty($object->getOwnerPHID(), null);
       case ManiphestTransaction::TYPE_CCS:
         return array_values(array_unique($object->getCCPHIDs()));
       case ManiphestTransaction::TYPE_PROJECT_COLUMN:
         // These are pre-populated.
         return $xaction->getOldValue();
       case ManiphestTransaction::TYPE_SUBPRIORITY:
         return $object->getSubpriority();
+      case ManiphestTransaction::TYPE_MERGED_INTO:
+      case ManiphestTransaction::TYPE_MERGED_FROM:
+        return null;
     }
   }
 
   protected function getCustomTransactionNewValue(
     PhabricatorLiskDAO $object,
     PhabricatorApplicationTransaction $xaction) {
 
     switch ($xaction->getTransactionType()) {
       case ManiphestTransaction::TYPE_PRIORITY:
         return (int)$xaction->getNewValue();
       case ManiphestTransaction::TYPE_CCS:
         return array_values(array_unique($xaction->getNewValue()));
       case ManiphestTransaction::TYPE_OWNER:
         return nonempty($xaction->getNewValue(), null);
       case ManiphestTransaction::TYPE_STATUS:
       case ManiphestTransaction::TYPE_TITLE:
       case ManiphestTransaction::TYPE_DESCRIPTION:
       case ManiphestTransaction::TYPE_SUBPRIORITY:
       case ManiphestTransaction::TYPE_PROJECT_COLUMN:
+      case ManiphestTransaction::TYPE_MERGED_INTO:
+      case ManiphestTransaction::TYPE_MERGED_FROM:
       case ManiphestTransaction::TYPE_UNBLOCK:
         return $xaction->getNewValue();
     }
   }
 
   protected function transactionHasEffect(
     PhabricatorLiskDAO $object,
     PhabricatorApplicationTransaction $xaction) {
 
     $old = $xaction->getOldValue();
     $new = $xaction->getNewValue();
 
     switch ($xaction->getTransactionType()) {
       case ManiphestTransaction::TYPE_CCS:
         sort($old);
         sort($new);
         return ($old !== $new);
       case ManiphestTransaction::TYPE_PROJECT_COLUMN:
         $new_column_phids = $new['columnPHIDs'];
         $old_column_phids = $old['columnPHIDs'];
         sort($new_column_phids);
         sort($old_column_phids);
         return ($old !== $new);
     }
 
     return parent::transactionHasEffect($object, $xaction);
   }
 
   protected function applyCustomInternalTransaction(
     PhabricatorLiskDAO $object,
     PhabricatorApplicationTransaction $xaction) {
 
     switch ($xaction->getTransactionType()) {
       case ManiphestTransaction::TYPE_PRIORITY:
         return $object->setPriority($xaction->getNewValue());
       case ManiphestTransaction::TYPE_STATUS:
         return $object->setStatus($xaction->getNewValue());
       case ManiphestTransaction::TYPE_TITLE:
         return $object->setTitle($xaction->getNewValue());
       case ManiphestTransaction::TYPE_DESCRIPTION:
         return $object->setDescription($xaction->getNewValue());
       case ManiphestTransaction::TYPE_OWNER:
         $phid = $xaction->getNewValue();
 
         // Update the "ownerOrdering" column to contain the full name of the
         // owner, if the task is assigned.
 
         $handle = null;
         if ($phid) {
           $handle = id(new PhabricatorHandleQuery())
             ->setViewer($this->getActor())
             ->withPHIDs(array($phid))
             ->executeOne();
         }
 
         if ($handle) {
           $object->setOwnerOrdering($handle->getName());
         } else {
           $object->setOwnerOrdering(null);
         }
 
         return $object->setOwnerPHID($phid);
       case ManiphestTransaction::TYPE_CCS:
         return $object->setCCPHIDs($xaction->getNewValue());
       case ManiphestTransaction::TYPE_SUBPRIORITY:
         $data = $xaction->getNewValue();
         $new_sub = $this->getNextSubpriority(
           $data['newPriority'],
           $data['newSubpriorityBase'],
           $data['direction']);
         $object->setSubpriority($new_sub);
         return;
       case ManiphestTransaction::TYPE_PROJECT_COLUMN:
         // these do external (edge) updates
         return;
+      case ManiphestTransaction::TYPE_MERGED_INTO:
+        $object->setStatus(ManiphestTaskStatus::getDuplicateStatus());
+        return;
+      case ManiphestTransaction::TYPE_MERGED_FROM:
+        return;
     }
   }
 
   protected function expandTransaction(
     PhabricatorLiskDAO $object,
     PhabricatorApplicationTransaction $xaction) {
 
     $xactions = parent::expandTransaction($object, $xaction);
     switch ($xaction->getTransactionType()) {
       case ManiphestTransaction::TYPE_SUBPRIORITY:
         $data = $xaction->getNewValue();
         $new_pri = $data['newPriority'];
         if ($new_pri != $object->getPriority()) {
           $xactions[] = id(new ManiphestTransaction())
             ->setTransactionType(ManiphestTransaction::TYPE_PRIORITY)
             ->setNewValue($new_pri);
         }
         break;
       default:
         break;
     }
 
     return $xactions;
   }
 
   protected function applyCustomExternalTransaction(
     PhabricatorLiskDAO $object,
     PhabricatorApplicationTransaction $xaction) {
 
     switch ($xaction->getTransactionType()) {
       case ManiphestTransaction::TYPE_PROJECT_COLUMN:
         $board_phid = idx($xaction->getNewValue(), 'projectPHID');
         if (!$board_phid) {
           throw new Exception(
             pht("Expected 'projectPHID' in column transaction."));
         }
 
         $old_phids = idx($xaction->getOldValue(), 'columnPHIDs', array());
         $new_phids = idx($xaction->getNewValue(), 'columnPHIDs', array());
         if (count($new_phids) !== 1) {
           throw new Exception(
             pht("Expected exactly one 'columnPHIDs' in column transaction."));
         }
 
         $columns = id(new PhabricatorProjectColumnQuery())
           ->setViewer($this->requireActor())
           ->withPHIDs($new_phids)
           ->execute();
         $columns = mpull($columns, null, 'getPHID');
 
         $positions = id(new PhabricatorProjectColumnPositionQuery())
           ->setViewer($this->requireActor())
           ->withObjectPHIDs(array($object->getPHID()))
           ->withBoardPHIDs(array($board_phid))
           ->execute();
 
         $before_phid = idx($xaction->getNewValue(), 'beforePHID');
         $after_phid = idx($xaction->getNewValue(), 'afterPHID');
 
         if (!$before_phid && !$after_phid && ($old_phids == $new_phids)) {
           // If we are not moving the object between columns and also not
           // reordering the position, this is a move on some other order
           // (like priority). We can leave the positions untouched and just
           // bail, there's no work to be done.
           return;
         }
 
         // Otherwise, we're either moving between columns or adjusting the
         // object's position in the "natural" ordering, so we do need to update
         // some rows.
 
         // Remove all existing column positions on the board.
 
         foreach ($positions as $position) {
           $position->delete();
         }
 
         // Add the new column positions.
 
         foreach ($new_phids as $phid) {
           $column = idx($columns, $phid);
           if (!$column) {
             throw new Exception(
               pht('No such column "%s" exists!', $phid));
           }
 
           // Load the other object positions in the column. Note that we must
           // skip implicit column creation to avoid generating a new position
           // if the target column is a backlog column.
 
           $other_positions = id(new PhabricatorProjectColumnPositionQuery())
             ->setViewer($this->requireActor())
             ->withColumns(array($column))
             ->withBoardPHIDs(array($board_phid))
             ->setSkipImplicitCreate(true)
             ->execute();
           $other_positions = msort($other_positions, 'getOrderingKey');
 
           // Set up the new position object. We're going to figure out the
           // right sequence number and then persist this object with that
           // sequence number.
           $new_position = id(new PhabricatorProjectColumnPosition())
             ->setBoardPHID($board_phid)
             ->setColumnPHID($column->getPHID())
             ->setObjectPHID($object->getPHID());
 
           $updates = array();
           $sequence = 0;
 
           // If we're just dropping this into the column without any specific
           // position information, put it at the top.
           if (!$before_phid && !$after_phid) {
             $new_position->setSequence($sequence)->save();
             $sequence++;
           }
 
           foreach ($other_positions as $position) {
             $object_phid = $position->getObjectPHID();
 
             // If this is the object we're moving before and we haven't
             // saved yet, insert here.
             if (($before_phid == $object_phid) && !$new_position->getID()) {
               $new_position->setSequence($sequence)->save();
               $sequence++;
             }
 
             // This object goes here in the sequence; we might need to update
             // the row.
             if ($sequence != $position->getSequence()) {
               $updates[$position->getID()] = $sequence;
             }
             $sequence++;
 
             // If this is the object we're moving after and we haven't saved
             // yet, insert here.
             if (($after_phid == $object_phid) && !$new_position->getID()) {
               $new_position->setSequence($sequence)->save();
               $sequence++;
             }
           }
 
           // We should have found a place to put it.
           if (!$new_position->getID()) {
             throw new Exception(
               pht('Unable to find a place to insert object on column!'));
           }
 
           // If we changed other objects' column positions, bulk reorder them.
 
           if ($updates) {
             $position = new PhabricatorProjectColumnPosition();
             $conn_w = $position->establishConnection('w');
 
             $pairs = array();
             foreach ($updates as $id => $sequence) {
               // This is ugly because MySQL gets upset with us if it is
               // configured strictly and we attempt inserts which can't work.
               // We'll never actually do these inserts since they'll always
               // collide (triggering the ON DUPLICATE KEY logic), so we just
               // provide dummy values in order to get there.
 
               $pairs[] = qsprintf(
                 $conn_w,
                 '(%d, %d, "", "", "")',
                 $id,
                 $sequence);
             }
 
             queryfx(
               $conn_w,
               'INSERT INTO %T (id, sequence, boardPHID, columnPHID, objectPHID)
                 VALUES %Q ON DUPLICATE KEY UPDATE sequence = VALUES(sequence)',
               $position->getTableName(),
               implode(', ', $pairs));
           }
         }
         break;
       default:
         break;
     }
   }
 
   protected function applyFinalEffects(
     PhabricatorLiskDAO $object,
     array $xactions) {
 
     // When we change the status of a task, update tasks this tasks blocks
     // with a message to the effect of "alincoln resolved blocking task Txxx."
     $unblock_xaction = null;
     foreach ($xactions as $xaction) {
       switch ($xaction->getTransactionType()) {
         case ManiphestTransaction::TYPE_STATUS:
           $unblock_xaction = $xaction;
           break;
       }
     }
 
     if ($unblock_xaction !== null) {
       $blocked_phids = PhabricatorEdgeQuery::loadDestinationPHIDs(
         $object->getPHID(),
         PhabricatorEdgeConfig::TYPE_TASK_DEPENDED_ON_BY_TASK);
       if ($blocked_phids) {
         // In theory we could apply these through policies, but that seems a
         // little bit surprising. For now, use the actor's vision.
         $blocked_tasks = id(new ManiphestTaskQuery())
           ->setViewer($this->getActor())
           ->withPHIDs($blocked_phids)
           ->execute();
 
         $old = $unblock_xaction->getOldValue();
         $new = $unblock_xaction->getNewValue();
 
         foreach ($blocked_tasks as $blocked_task) {
           $unblock_xactions = array();
 
           $unblock_xactions[] = id(new ManiphestTransaction())
             ->setTransactionType(ManiphestTransaction::TYPE_UNBLOCK)
             ->setOldValue(array($object->getPHID() => $old))
             ->setNewValue(array($object->getPHID() => $new));
 
           id(new ManiphestTransactionEditor())
             ->setActor($this->getActor())
             ->setActingAsPHID($this->getActingAsPHID())
             ->setContentSource($this->getContentSource())
             ->setContinueOnNoEffect(true)
             ->setContinueOnMissingFields(true)
             ->applyTransactions($blocked_task, $unblock_xactions);
         }
       }
     }
 
     return $xactions;
   }
 
   protected function shouldSendMail(
     PhabricatorLiskDAO $object,
     array $xactions) {
 
     $xactions = mfilter($xactions, 'shouldHide', true);
     return $xactions;
   }
 
   protected function getMailSubjectPrefix() {
     return PhabricatorEnv::getEnvConfig('metamta.maniphest.subject-prefix');
   }
 
   protected function getMailThreadID(PhabricatorLiskDAO $object) {
     return 'maniphest-task-'.$object->getPHID();
   }
 
   protected function getMailTo(PhabricatorLiskDAO $object) {
     return array(
       $object->getOwnerPHID(),
       $this->getActingAsPHID(),
     );
   }
 
   protected function getMailCC(PhabricatorLiskDAO $object) {
     $phids = array();
 
     foreach ($object->getCCPHIDs() as $phid) {
       $phids[] = $phid;
     }
 
     foreach (parent::getMailCC($object) as $phid) {
       $phids[] = $phid;
     }
 
     foreach ($this->heraldEmailPHIDs as $phid) {
       $phids[] = $phid;
     }
 
     return $phids;
   }
 
   public function getMailTagsMap() {
     return array(
       ManiphestTransaction::MAILTAG_STATUS =>
         pht("A task's status changes."),
       ManiphestTransaction::MAILTAG_OWNER =>
         pht("A task's owner changes."),
       ManiphestTransaction::MAILTAG_PRIORITY =>
         pht("A task's priority changes."),
       ManiphestTransaction::MAILTAG_CC =>
         pht("A task's subscribers change."),
       ManiphestTransaction::MAILTAG_PROJECTS =>
         pht("A task's associated projects change."),
       ManiphestTransaction::MAILTAG_UNBLOCK =>
         pht('One of the tasks a task is blocked by changes status.'),
       ManiphestTransaction::MAILTAG_COLUMN =>
         pht('A task is moved between columns on a workboard.'),
       ManiphestTransaction::MAILTAG_COMMENT =>
         pht('Someone comments on a task.'),
       ManiphestTransaction::MAILTAG_OTHER =>
         pht('Other task activity not listed above occurs.'),
     );
   }
 
   protected function buildReplyHandler(PhabricatorLiskDAO $object) {
     return id(new ManiphestReplyHandler())
       ->setMailReceiver($object);
   }
 
   protected function buildMailTemplate(PhabricatorLiskDAO $object) {
     $id = $object->getID();
     $title = $object->getTitle();
 
     return id(new PhabricatorMetaMTAMail())
       ->setSubject("T{$id}: {$title}")
       ->addHeader('Thread-Topic', "T{$id}: ".$object->getOriginalTitle());
   }
 
   protected function buildMailBody(
     PhabricatorLiskDAO $object,
     array $xactions) {
 
     $body = parent::buildMailBody($object, $xactions);
 
     if ($this->getIsNewObject()) {
       $body->addTextSection(
         pht('TASK DESCRIPTION'),
         $object->getDescription());
     }
 
     $body->addTextSection(
       pht('TASK DETAIL'),
       PhabricatorEnv::getProductionURI('/T'.$object->getID()));
 
     return $body;
   }
 
   protected function shouldPublishFeedStory(
     PhabricatorLiskDAO $object,
     array $xactions) {
     return $this->shouldSendMail($object, $xactions);
   }
 
   protected function supportsSearch() {
     return true;
   }
 
   protected function shouldApplyHeraldRules(
     PhabricatorLiskDAO $object,
     array $xactions) {
     return true;
   }
 
   protected function buildHeraldAdapter(
     PhabricatorLiskDAO $object,
     array $xactions) {
 
     return id(new HeraldManiphestTaskAdapter())
       ->setTask($object);
   }
 
   protected function didApplyHeraldRules(
     PhabricatorLiskDAO $object,
     HeraldAdapter $adapter,
     HeraldTranscript $transcript) {
 
     // TODO: Convert these to transactions. The way Maniphest deals with these
     // transactions is currently unconventional and messy.
 
     $save_again = false;
     $cc_phids = $adapter->getCcPHIDs();
     if ($cc_phids) {
       $existing_cc = $object->getCCPHIDs();
       $new_cc = array_unique(array_merge($cc_phids, $existing_cc));
       $object->setCCPHIDs($new_cc);
       $object->save();
     }
 
     $this->heraldEmailPHIDs = $adapter->getEmailPHIDs();
 
     $xactions = array();
 
     $assign_phid = $adapter->getAssignPHID();
     if ($assign_phid) {
       $xactions[] = id(new ManiphestTransaction())
         ->setTransactionType(ManiphestTransaction::TYPE_OWNER)
         ->setNewValue($assign_phid);
     }
 
     $project_phids = $adapter->getProjectPHIDs();
     if ($project_phids) {
       $project_type = PhabricatorProjectObjectHasProjectEdgeType::EDGECONST;
       $xactions[] = id(new ManiphestTransaction())
         ->setTransactionType(PhabricatorTransactions::TYPE_EDGE)
         ->setMetadataValue('edge:type', $project_type)
         ->setNewValue(
           array(
             '+' => array_fuse($project_phids),
           ));
     }
 
     return $xactions;
   }
 
   protected function requireCapabilities(
     PhabricatorLiskDAO $object,
     PhabricatorApplicationTransaction $xaction) {
 
     parent::requireCapabilities($object, $xaction);
 
     $app_capability_map = array(
       ManiphestTransaction::TYPE_PRIORITY =>
         ManiphestEditPriorityCapability::CAPABILITY,
       ManiphestTransaction::TYPE_STATUS =>
         ManiphestEditStatusCapability::CAPABILITY,
       ManiphestTransaction::TYPE_OWNER =>
         ManiphestEditAssignCapability::CAPABILITY,
       PhabricatorTransactions::TYPE_EDIT_POLICY =>
         ManiphestEditPoliciesCapability::CAPABILITY,
       PhabricatorTransactions::TYPE_VIEW_POLICY =>
         ManiphestEditPoliciesCapability::CAPABILITY,
     );
 
 
     $transaction_type = $xaction->getTransactionType();
 
     $app_capability = null;
     if ($transaction_type == PhabricatorTransactions::TYPE_EDGE) {
       switch ($xaction->getMetadataValue('edge:type')) {
         case PhabricatorProjectObjectHasProjectEdgeType::EDGECONST:
           $app_capability = ManiphestEditProjectsCapability::CAPABILITY;
           break;
       }
     } else {
       $app_capability = idx($app_capability_map, $transaction_type);
     }
 
     if ($app_capability) {
       $app = id(new PhabricatorApplicationQuery())
         ->setViewer($this->getActor())
         ->withClasses(array('PhabricatorManiphestApplication'))
         ->executeOne();
       PhabricatorPolicyFilter::requireCapability(
         $this->getActor(),
         $app,
         $app_capability);
     }
   }
 
   protected function adjustObjectForPolicyChecks(
     PhabricatorLiskDAO $object,
     array $xactions) {
 
     $copy = parent::adjustObjectForPolicyChecks($object, $xactions);
     foreach ($xactions as $xaction) {
       switch ($xaction->getTransactionType()) {
         case ManiphestTransaction::TYPE_OWNER:
           $copy->setOwnerPHID($xaction->getNewValue());
           break;
         default:
           continue;
       }
     }
 
     return $copy;
   }
 
   private function getNextSubpriority($pri, $sub, $dir = '>') {
     switch ($dir) {
       case '>':
         $order = 'ASC';
         break;
       case '<':
         $order = 'DESC';
         break;
       default:
         throw new Exception('$dir must be ">" or "<".');
         break;
     }
 
     if ($sub === null) {
       $base = 0;
     } else {
       $base = $sub;
     }
 
     if ($sub === null) {
       $next = id(new ManiphestTask())->loadOneWhere(
         'priority = %d ORDER BY subpriority %Q LIMIT 1',
         $pri,
         $order);
       if ($next) {
         if ($dir == '>') {
           return $next->getSubpriority() - ((double)(2 << 16));
         } else {
           return $next->getSubpriority() + ((double)(2 << 16));
         }
       }
     } else {
       $next = id(new ManiphestTask())->loadOneWhere(
         'priority = %d AND subpriority %Q %f ORDER BY subpriority %Q LIMIT 1',
         $pri,
         $dir,
         $sub,
         $order);
       if ($next) {
         return ($sub + $next->getSubpriority()) / 2;
       }
     }
 
     if ($dir == '>') {
       return $base + (double)(2 << 32);
     } else {
       return $base - (double)(2 << 32);
     }
   }
 
 }
diff --git a/src/applications/maniphest/storage/ManiphestTransaction.php b/src/applications/maniphest/storage/ManiphestTransaction.php
index fb383e3cdc..69ba720d29 100644
--- a/src/applications/maniphest/storage/ManiphestTransaction.php
+++ b/src/applications/maniphest/storage/ManiphestTransaction.php
@@ -1,896 +1,942 @@
 <?php
 
 final class ManiphestTransaction
   extends PhabricatorApplicationTransaction {
 
   const TYPE_TITLE = 'title';
   const TYPE_STATUS = 'status';
   const TYPE_DESCRIPTION = 'description';
   const TYPE_OWNER  = 'reassign';
   const TYPE_CCS = 'ccs';
   const TYPE_PROJECTS = 'projects';
   const TYPE_PRIORITY = 'priority';
   const TYPE_EDGE = 'edge';
   const TYPE_SUBPRIORITY = 'subpriority';
   const TYPE_PROJECT_COLUMN = 'projectcolumn';
+  const TYPE_MERGED_INTO = 'mergedinto';
+  const TYPE_MERGED_FROM = 'mergedfrom';
 
   const TYPE_UNBLOCK = 'unblock';
 
   // NOTE: this type is deprecated. Keep it around for legacy installs
   // so any transactions render correctly.
   const TYPE_ATTACH = 'attach';
 
 
   const MAILTAG_STATUS = 'maniphest-status';
   const MAILTAG_OWNER = 'maniphest-owner';
   const MAILTAG_PRIORITY = 'maniphest-priority';
   const MAILTAG_CC = 'maniphest-cc';
   const MAILTAG_PROJECTS = 'maniphest-projects';
   const MAILTAG_COMMENT = 'maniphest-comment';
   const MAILTAG_COLUMN = 'maniphest-column';
   const MAILTAG_UNBLOCK = 'maniphest-unblock';
   const MAILTAG_OTHER = 'maniphest-other';
 
 
   public function getApplicationName() {
     return 'maniphest';
   }
 
   public function getApplicationTransactionType() {
     return ManiphestTaskPHIDType::TYPECONST;
   }
 
   public function getApplicationTransactionCommentObject() {
     return new ManiphestTransactionComment();
   }
 
   public function shouldGenerateOldValue() {
     switch ($this->getTransactionType()) {
       case self::TYPE_PROJECT_COLUMN:
       case self::TYPE_EDGE:
       case self::TYPE_UNBLOCK:
         return false;
     }
 
     return parent::shouldGenerateOldValue();
   }
 
   public function getRemarkupBlocks() {
     $blocks = parent::getRemarkupBlocks();
 
     switch ($this->getTransactionType()) {
       case self::TYPE_DESCRIPTION:
         $blocks[] = $this->getNewValue();
         break;
     }
 
     return $blocks;
   }
 
   public function getRequiredHandlePHIDs() {
     $phids = parent::getRequiredHandlePHIDs();
 
     $new = $this->getNewValue();
     $old = $this->getOldValue();
 
     switch ($this->getTransactionType()) {
       case self::TYPE_OWNER:
         if ($new) {
           $phids[] = $new;
         }
 
         if ($old) {
           $phids[] = $old;
         }
         break;
       case self::TYPE_CCS:
       case self::TYPE_PROJECTS:
         $phids = array_mergev(
           array(
             $phids,
             nonempty($old, array()),
             nonempty($new, array()),
           ));
         break;
       case self::TYPE_PROJECT_COLUMN:
         $phids[] = $new['projectPHID'];
         $phids[] = head($new['columnPHIDs']);
         break;
+      case self::TYPE_MERGED_INTO:
+        $phids[] = $new;
+        break;
+      case self::TYPE_MERGED_FROM:
+        $phids = array_merge($phids, $new);
+        break;
       case self::TYPE_EDGE:
         $phids = array_mergev(
           array(
             $phids,
             array_keys(nonempty($old, array())),
             array_keys(nonempty($new, array())),
           ));
         break;
       case self::TYPE_ATTACH:
         $old = nonempty($old, array());
         $new = nonempty($new, array());
         $phids = array_mergev(
           array(
             $phids,
             array_keys(idx($new, 'FILE', array())),
             array_keys(idx($old, 'FILE', array())),
           ));
         break;
       case self::TYPE_UNBLOCK:
         foreach (array_keys($new) as $phid) {
           $phids[] = $phid;
         }
         break;
     }
 
     return $phids;
   }
 
   public function shouldHide() {
     switch ($this->getTransactionType()) {
       case self::TYPE_DESCRIPTION:
       case self::TYPE_PRIORITY:
       case self::TYPE_STATUS:
         if ($this->getOldValue() === null) {
           return true;
         } else {
           return false;
         }
         break;
       case self::TYPE_SUBPRIORITY:
         return true;
       case self::TYPE_PROJECT_COLUMN:
         $old_cols = idx($this->getOldValue(), 'columnPHIDs');
         $new_cols = idx($this->getNewValue(), 'columnPHIDs');
 
         $old_cols = array_values($old_cols);
         $new_cols = array_values($new_cols);
         sort($old_cols);
         sort($new_cols);
 
         return ($old_cols === $new_cols);
     }
 
     return parent::shouldHide();
   }
 
   public function getActionStrength() {
     switch ($this->getTransactionType()) {
       case self::TYPE_TITLE:
         return 1.4;
       case self::TYPE_STATUS:
         return 1.3;
       case self::TYPE_OWNER:
         return 1.2;
       case self::TYPE_PRIORITY:
         return 1.1;
     }
 
     return parent::getActionStrength();
   }
 
 
   public function getColor() {
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
     switch ($this->getTransactionType()) {
       case self::TYPE_OWNER:
         if ($this->getAuthorPHID() == $new) {
           return 'green';
         } else if (!$new) {
           return 'black';
         } else if (!$old) {
           return 'green';
         } else {
           return 'green';
         }
 
       case self::TYPE_STATUS:
         $color = ManiphestTaskStatus::getStatusColor($new);
         if ($color !== null) {
           return $color;
         }
 
         if (ManiphestTaskStatus::isOpenStatus($new)) {
           return 'green';
         } else {
           return 'black';
         }
 
       case self::TYPE_PRIORITY:
         if ($old == ManiphestTaskPriority::getDefaultPriority()) {
           return 'green';
         } else if ($old > $new) {
           return 'grey';
         } else {
           return 'yellow';
         }
 
     }
 
     return parent::getColor();
   }
 
   public function getActionName() {
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
     switch ($this->getTransactionType()) {
       case self::TYPE_TITLE:
         if ($old === null) {
           return pht('Created');
         }
 
         return pht('Retitled');
 
       case self::TYPE_STATUS:
         $action = ManiphestTaskStatus::getStatusActionName($new);
         if ($action) {
           return $action;
         }
 
         $old_closed = ManiphestTaskStatus::isClosedStatus($old);
         $new_closed = ManiphestTaskStatus::isClosedStatus($new);
 
         if ($new_closed && !$old_closed) {
           return pht('Closed');
         } else if (!$new_closed && $old_closed) {
           return pht('Reopened');
         } else {
           return pht('Changed Status');
         }
 
       case self::TYPE_DESCRIPTION:
         return pht('Edited');
 
       case self::TYPE_OWNER:
         if ($this->getAuthorPHID() == $new) {
           return pht('Claimed');
         } else if (!$new) {
           return pht('Up For Grabs');
         } else if (!$old) {
           return pht('Assigned');
         } else {
           return pht('Reassigned');
         }
 
       case self::TYPE_CCS:
         return pht('Changed CC');
 
       case self::TYPE_PROJECTS:
         return pht('Changed Projects');
 
       case self::TYPE_PROJECT_COLUMN:
         return pht('Changed Project Column');
 
       case self::TYPE_PRIORITY:
         if ($old == ManiphestTaskPriority::getDefaultPriority()) {
           return pht('Triaged');
         } else if ($old > $new) {
           return pht('Lowered Priority');
         } else {
           return pht('Raised Priority');
         }
 
       case self::TYPE_EDGE:
       case self::TYPE_ATTACH:
         return pht('Attached');
 
       case self::TYPE_UNBLOCK:
         $old_status = head($old);
         $new_status = head($new);
 
         $old_closed = ManiphestTaskStatus::isClosedStatus($old_status);
         $new_closed = ManiphestTaskStatus::isClosedStatus($new_status);
 
         if ($old_closed && !$new_closed) {
           return pht('Block');
         } else if (!$old_closed && $new_closed) {
           return pht('Unblock');
         } else {
           return pht('Blocker');
         }
 
+      case self::TYPE_MERGED_INTO:
+      case self::TYPE_MERGED_FROM:
+        return pht('Merged');
+
     }
 
     return parent::getActionName();
   }
 
   public function getIcon() {
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
     switch ($this->getTransactionType()) {
       case self::TYPE_OWNER:
         return 'fa-user';
 
       case self::TYPE_CCS:
         return 'fa-envelope';
 
       case self::TYPE_TITLE:
         if ($old === null) {
           return 'fa-pencil';
         }
 
         return 'fa-pencil';
 
       case self::TYPE_STATUS:
         $action = ManiphestTaskStatus::getStatusIcon($new);
         if ($action !== null) {
           return $action;
         }
 
         if (ManiphestTaskStatus::isClosedStatus($new)) {
           return 'fa-check';
         } else {
           return 'fa-pencil';
         }
 
       case self::TYPE_DESCRIPTION:
         return 'fa-pencil';
 
       case self::TYPE_PROJECTS:
         return 'fa-briefcase';
 
       case self::TYPE_PROJECT_COLUMN:
         return 'fa-columns';
 
+      case self::TYPE_MERGED_INTO:
+      case self::TYPE_MERGED_FROM:
+        return 'fa-compress';
+
       case self::TYPE_PRIORITY:
         if ($old == ManiphestTaskPriority::getDefaultPriority()) {
           return 'fa-arrow-right';
         } else if ($old > $new) {
           return 'fa-arrow-down';
         } else {
           return 'fa-arrow-up';
         }
 
       case self::TYPE_EDGE:
       case self::TYPE_ATTACH:
         return 'fa-thumb-tack';
 
       case self::TYPE_UNBLOCK:
         return 'fa-shield';
 
     }
 
     return parent::getIcon();
   }
 
 
 
   public function getTitle() {
     $author_phid = $this->getAuthorPHID();
 
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
     switch ($this->getTransactionType()) {
       case self::TYPE_TITLE:
         if ($old === null) {
           return pht(
             '%s created this task.',
             $this->renderHandleLink($author_phid));
         }
         return pht(
           '%s changed the title from "%s" to "%s".',
           $this->renderHandleLink($author_phid),
           $old,
           $new);
 
       case self::TYPE_DESCRIPTION:
         return pht(
           '%s edited the task description.',
           $this->renderHandleLink($author_phid));
 
       case self::TYPE_STATUS:
         $old_closed = ManiphestTaskStatus::isClosedStatus($old);
         $new_closed = ManiphestTaskStatus::isClosedStatus($new);
 
         $old_name = ManiphestTaskStatus::getTaskStatusName($old);
         $new_name = ManiphestTaskStatus::getTaskStatusName($new);
 
         if ($new_closed && !$old_closed) {
           if ($new == ManiphestTaskStatus::getDuplicateStatus()) {
             return pht(
               '%s closed this task as a duplicate.',
               $this->renderHandleLink($author_phid));
           } else {
             return pht(
               '%s closed this task as "%s".',
               $this->renderHandleLink($author_phid),
               $new_name);
           }
         } else if (!$new_closed && $old_closed) {
           return pht(
             '%s reopened this task as "%s".',
             $this->renderHandleLink($author_phid),
             $new_name);
         } else {
           return pht(
             '%s changed the task status from "%s" to "%s".',
             $this->renderHandleLink($author_phid),
             $old_name,
             $new_name);
         }
 
       case self::TYPE_UNBLOCK:
         $blocker_phid = key($new);
         $old_status = head($old);
         $new_status = head($new);
 
         $old_closed = ManiphestTaskStatus::isClosedStatus($old_status);
         $new_closed = ManiphestTaskStatus::isClosedStatus($new_status);
 
         $old_name = ManiphestTaskStatus::getTaskStatusName($old_status);
         $new_name = ManiphestTaskStatus::getTaskStatusName($new_status);
 
         if ($old_closed && !$new_closed) {
           return pht(
             '%s reopened blocking task %s as "%s".',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($blocker_phid),
             $new_name);
         } else if (!$old_closed && $new_closed) {
           return pht(
             '%s closed blocking task %s as "%s".',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($blocker_phid),
             $new_name);
         } else {
           return pht(
             '%s changed the status of blocking task %s from "%s" to "%s".',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($blocker_phid),
             $old_name,
             $new_name);
         }
 
       case self::TYPE_OWNER:
         if ($author_phid == $new) {
           return pht(
             '%s claimed this task.',
             $this->renderHandleLink($author_phid));
         } else if (!$new) {
           return pht(
             '%s placed this task up for grabs.',
             $this->renderHandleLink($author_phid));
         } else if (!$old) {
           return pht(
             '%s assigned this task to %s.',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($new));
         } else {
           return pht(
             '%s reassigned this task from %s to %s.',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($old),
             $this->renderHandleLink($new));
         }
 
       case self::TYPE_PROJECTS:
         $added = array_diff($new, $old);
         $removed = array_diff($old, $new);
         if ($added && !$removed) {
           return pht(
             '%s added %d project(s): %s',
             $this->renderHandleLink($author_phid),
             count($added),
             $this->renderHandleList($added));
         } else if ($removed && !$added) {
           return pht(
             '%s removed %d project(s): %s',
             $this->renderHandleLink($author_phid),
             count($removed),
             $this->renderHandleList($removed));
         } else if ($removed && $added) {
           return pht(
             '%s changed project(s), added %d: %s; removed %d: %s',
             $this->renderHandleLink($author_phid),
             count($added),
             $this->renderHandleList($added),
             count($removed),
             $this->renderHandleList($removed));
         } else {
           // This is hit when rendering previews.
           return pht(
             '%s changed projects...',
             $this->renderHandleLink($author_phid));
         }
 
       case self::TYPE_PRIORITY:
         $old_name = ManiphestTaskPriority::getTaskPriorityName($old);
         $new_name = ManiphestTaskPriority::getTaskPriorityName($new);
 
         if ($old == ManiphestTaskPriority::getDefaultPriority()) {
           return pht(
             '%s triaged this task as "%s" priority.',
             $this->renderHandleLink($author_phid),
             $new_name);
         } else if ($old > $new) {
           return pht(
             '%s lowered the priority of this task from "%s" to "%s".',
             $this->renderHandleLink($author_phid),
             $old_name,
             $new_name);
         } else {
           return pht(
             '%s raised the priority of this task from "%s" to "%s".',
             $this->renderHandleLink($author_phid),
             $old_name,
             $new_name);
         }
 
       case self::TYPE_CCS:
         // TODO: Remove this when we switch to subscribers. Just reuse the
         // code in the parent.
         $clone = clone $this;
         $clone->setTransactionType(PhabricatorTransactions::TYPE_SUBSCRIBERS);
         return $clone->getTitle();
 
       case self::TYPE_EDGE:
         // TODO: Remove this when we switch to real edges. Just reuse the
         // code in the parent;
         $clone = clone $this;
         $clone->setTransactionType(PhabricatorTransactions::TYPE_EDGE);
         return $clone->getTitle();
 
       case self::TYPE_ATTACH:
         $old = nonempty($old, array());
         $new = nonempty($new, array());
         $new = array_keys(idx($new, 'FILE', array()));
         $old = array_keys(idx($old, 'FILE', array()));
 
         $added = array_diff($new, $old);
         $removed = array_diff($old, $new);
         if ($added && !$removed) {
           return pht(
             '%s attached %d file(s): %s',
             $this->renderHandleLink($author_phid),
             count($added),
             $this->renderHandleList($added));
         } else if ($removed && !$added) {
           return pht(
             '%s detached %d file(s): %s',
             $this->renderHandleLink($author_phid),
             count($removed),
             $this->renderHandleList($removed));
         } else {
           return pht(
             '%s changed file(s), attached %d: %s; detached %d: %s',
             $this->renderHandleLink($author_phid),
             count($added),
             $this->renderHandleList($added),
             count($removed),
             $this->renderHandleList($removed));
         }
 
       case self::TYPE_PROJECT_COLUMN:
         $project_phid = $new['projectPHID'];
         $column_phid = head($new['columnPHIDs']);
         return pht(
           '%s moved this task to %s on the %s workboard.',
           $this->renderHandleLink($author_phid),
           $this->renderHandleLink($column_phid),
           $this->renderHandleLink($project_phid));
-       break;
+        break;
+
+      case self::TYPE_MERGED_INTO:
+        return pht(
+          '%s merged this task into %s.',
+          $this->renderHandleLink($author_phid),
+          $this->renderHandleLink($new));
+        break;
+
+      case self::TYPE_MERGED_FROM:
+        return pht(
+          '%s merged %d task(s): %s.',
+          $this->renderHandleLink($author_phid),
+          count($new),
+          $this->renderHandleList($new));
+        break;
 
 
     }
 
     return parent::getTitle();
   }
 
   public function getTitleForFeed(PhabricatorFeedStory $story) {
     $author_phid = $this->getAuthorPHID();
     $object_phid = $this->getObjectPHID();
 
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
     switch ($this->getTransactionType()) {
       case self::TYPE_TITLE:
         if ($old === null) {
           return pht(
             '%s created %s.',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid));
         }
 
         return pht(
           '%s renamed %s from "%s" to "%s".',
           $this->renderHandleLink($author_phid),
           $this->renderHandleLink($object_phid),
           $old,
           $new);
 
       case self::TYPE_DESCRIPTION:
         return pht(
           '%s edited the description of %s.',
           $this->renderHandleLink($author_phid),
           $this->renderHandleLink($object_phid));
 
       case self::TYPE_STATUS:
         $old_closed = ManiphestTaskStatus::isClosedStatus($old);
         $new_closed = ManiphestTaskStatus::isClosedStatus($new);
 
         $old_name = ManiphestTaskStatus::getTaskStatusName($old);
         $new_name = ManiphestTaskStatus::getTaskStatusName($new);
 
         if ($new_closed && !$old_closed) {
           if ($new == ManiphestTaskStatus::getDuplicateStatus()) {
             return pht(
               '%s closed %s as a duplicate.',
               $this->renderHandleLink($author_phid),
               $this->renderHandleLink($object_phid));
           } else {
             return pht(
               '%s closed %s as "%s".',
               $this->renderHandleLink($author_phid),
               $this->renderHandleLink($object_phid),
               $new_name);
           }
         } else if (!$new_closed && $old_closed) {
           return pht(
             '%s reopened %s as "%s".',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             $new_name);
         } else {
           return pht(
             '%s changed the status of %s from "%s" to "%s".',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             $old_name,
             $new_name);
         }
 
       case self::TYPE_UNBLOCK:
         $blocker_phid = key($new);
         $old_status = head($old);
         $new_status = head($new);
 
         $old_closed = ManiphestTaskStatus::isClosedStatus($old_status);
         $new_closed = ManiphestTaskStatus::isClosedStatus($new_status);
 
         $old_name = ManiphestTaskStatus::getTaskStatusName($old_status);
         $new_name = ManiphestTaskStatus::getTaskStatusName($new_status);
 
         if ($old_closed && !$new_closed) {
           return pht(
             '%s reopened %s, a task blocking %s, as "%s".',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($blocker_phid),
             $this->renderHandleLink($object_phid),
             $new_name);
         } else if (!$old_closed && $new_closed) {
           return pht(
             '%s closed %s, a task blocking %s, as "%s".',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($blocker_phid),
             $this->renderHandleLink($object_phid),
             $new_name);
         } else {
           return pht(
             '%s changed the status of %s, a task blocking %s, '.
             'from "%s" to "%s".',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($blocker_phid),
             $this->renderHandleLink($object_phid),
             $old_name,
             $new_name);
         }
 
       case self::TYPE_OWNER:
         if ($author_phid == $new) {
           return pht(
             '%s claimed %s.',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid));
         } else if (!$new) {
           return pht(
             '%s placed %s up for grabs.',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid));
         } else if (!$old) {
           return pht(
             '%s assigned %s to %s.',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             $this->renderHandleLink($new));
         } else {
           return pht(
             '%s reassigned %s from %s to %s.',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             $this->renderHandleLink($old),
             $this->renderHandleLink($new));
         }
 
       case self::TYPE_PROJECTS:
         $added = array_diff($new, $old);
         $removed = array_diff($old, $new);
         if ($added && !$removed) {
           return pht(
             '%s added %d project(s) to %s: %s',
             $this->renderHandleLink($author_phid),
             count($added),
             $this->renderHandleLink($object_phid),
             $this->renderHandleList($added));
         } else if ($removed && !$added) {
           return pht(
             '%s removed %d project(s) from %s: %s',
             $this->renderHandleLink($author_phid),
             count($removed),
             $this->renderHandleLink($object_phid),
             $this->renderHandleList($removed));
         } else if ($removed && $added) {
           return pht(
             '%s changed project(s) of %s, added %d: %s; removed %d: %s',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             count($added),
             $this->renderHandleList($added),
             count($removed),
             $this->renderHandleList($removed));
         }
 
       case self::TYPE_PRIORITY:
         $old_name = ManiphestTaskPriority::getTaskPriorityName($old);
         $new_name = ManiphestTaskPriority::getTaskPriorityName($new);
 
         if ($old == ManiphestTaskPriority::getDefaultPriority()) {
           return pht(
             '%s triaged %s as "%s" priority.',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             $new_name);
         } else if ($old > $new) {
           return pht(
             '%s lowered the priority of %s from "%s" to "%s".',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             $old_name,
             $new_name);
         } else {
           return pht(
             '%s raised the priority of %s from "%s" to "%s".',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             $old_name,
             $new_name);
         }
 
       case self::TYPE_CCS:
         // TODO: Remove this when we switch to subscribers. Just reuse the
         // code in the parent.
         $clone = clone $this;
         $clone->setTransactionType(PhabricatorTransactions::TYPE_SUBSCRIBERS);
         return $clone->getTitleForFeed($story);
 
       case self::TYPE_EDGE:
         // TODO: Remove this when we switch to real edges. Just reuse the
         // code in the parent;
         $clone = clone $this;
         $clone->setTransactionType(PhabricatorTransactions::TYPE_EDGE);
         return $clone->getTitleForFeed($story);
 
       case self::TYPE_ATTACH:
         $old = nonempty($old, array());
         $new = nonempty($new, array());
         $new = array_keys(idx($new, 'FILE', array()));
         $old = array_keys(idx($old, 'FILE', array()));
 
         $added = array_diff($new, $old);
         $removed = array_diff($old, $new);
         if ($added && !$removed) {
           return pht(
             '%s attached %d file(s) of %s: %s',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             count($added),
             $this->renderHandleList($added));
         } else if ($removed && !$added) {
           return pht(
             '%s detached %d file(s) of %s: %s',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             count($removed),
             $this->renderHandleList($removed));
         } else {
           return pht(
             '%s changed file(s) for %s, attached %d: %s; detached %d: %s',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid),
             count($added),
             $this->renderHandleList($added),
             count($removed),
             $this->renderHandleList($removed));
         }
 
       case self::TYPE_PROJECT_COLUMN:
         $project_phid = $new['projectPHID'];
         $column_phid = head($new['columnPHIDs']);
         return pht(
           '%s moved %s to %s on the %s workboard.',
           $this->renderHandleLink($author_phid),
           $this->renderHandleLink($object_phid),
           $this->renderHandleLink($column_phid),
           $this->renderHandleLink($project_phid));
-       break;
+
+      case self::TYPE_MERGED_INTO:
+        return pht(
+          '%s merged task %s into %s.',
+          $this->renderHandleLink($author_phid),
+          $this->renderHandleLink($object_phid),
+          $this->renderHandleLink($new));
+
+      case self::TYPE_MERGED_FROM:
+        return pht(
+          '%s merged %d task(s) %s into %s.',
+          $this->renderHandleLink($author_phid),
+          count($new),
+          $this->renderHandleList($new),
+          $this->renderHandleLink($object_phid));
+
     }
 
     return parent::getTitleForFeed($story);
   }
 
   public function hasChangeDetails() {
     switch ($this->getTransactionType()) {
       case self::TYPE_DESCRIPTION:
         return true;
     }
     return parent::hasChangeDetails();
   }
 
   public function renderChangeDetails(PhabricatorUser $viewer) {
     return $this->renderTextCorpusChangeDetails(
       $viewer,
       $this->getOldValue(),
       $this->getNewValue());
   }
 
   public function getMailTags() {
     $tags = array();
     switch ($this->getTransactionType()) {
       case self::TYPE_STATUS:
         $tags[] = self::MAILTAG_STATUS;
         break;
       case self::TYPE_OWNER:
         $tags[] = self::MAILTAG_OWNER;
         break;
       case self::TYPE_CCS:
         $tags[] = self::MAILTAG_CC;
         break;
       case PhabricatorTransactions::TYPE_EDGE:
         switch ($this->getMetadataValue('edge:type')) {
           case PhabricatorProjectObjectHasProjectEdgeType::EDGECONST:
             $tags[] = self::MAILTAG_PROJECTS;
             break;
           default:
             $tags[] = self::MAILTAG_OTHER;
             break;
         }
         break;
       case self::TYPE_PRIORITY:
         $tags[] = self::MAILTAG_PRIORITY;
         break;
       case self::TYPE_UNBLOCK:
         $tags[] = self::MAILTAG_UNBLOCK;
         break;
       case self::TYPE_PROJECT_COLUMN:
         $tags[] = self::MAILTAG_COLUMN;
         break;
       case PhabricatorTransactions::TYPE_COMMENT:
         $tags[] = self::MAILTAG_COMMENT;
         break;
       default:
         $tags[] = self::MAILTAG_OTHER;
         break;
     }
     return $tags;
   }
 
   public function getNoEffectDescription() {
 
     switch ($this->getTransactionType()) {
       case self::TYPE_STATUS:
         return pht('The task already has the selected status.');
       case self::TYPE_OWNER:
         return pht('The task already has the selected owner.');
       case self::TYPE_PROJECTS:
         return pht('The task is already associated with those projects.');
       case self::TYPE_PRIORITY:
         return pht('The task already has the selected priority.');
     }
 
     return parent::getNoEffectDescription();
   }
 
 }
diff --git a/src/applications/search/controller/PhabricatorSearchAttachController.php b/src/applications/search/controller/PhabricatorSearchAttachController.php
index 082d120b8b..a07e8b17d1 100644
--- a/src/applications/search/controller/PhabricatorSearchAttachController.php
+++ b/src/applications/search/controller/PhabricatorSearchAttachController.php
@@ -1,333 +1,317 @@
 <?php
 
 final class PhabricatorSearchAttachController
   extends PhabricatorSearchBaseController {
 
   private $phid;
   private $type;
   private $action;
 
   const ACTION_ATTACH       = 'attach';
   const ACTION_MERGE        = 'merge';
   const ACTION_DEPENDENCIES = 'dependencies';
   const ACTION_BLOCKS       = 'blocks';
   const ACTION_EDGE         = 'edge';
 
   public function willProcessRequest(array $data) {
     $this->phid = $data['phid'];
     $this->type = $data['type'];
     $this->action = idx($data, 'action', self::ACTION_ATTACH);
   }
 
   public function processRequest() {
 
     $request = $this->getRequest();
     $user = $request->getUser();
 
     $handle = id(new PhabricatorHandleQuery())
       ->setViewer($user)
       ->withPHIDs(array($this->phid))
       ->executeOne();
 
     $object_type = $handle->getType();
     $attach_type = $this->type;
 
     $object = id(new PhabricatorObjectQuery())
       ->setViewer($user)
       ->withPHIDs(array($this->phid))
       ->executeOne();
 
     if (!$object) {
       return new Aphront404Response();
     }
 
     $edge_type = null;
     switch ($this->action) {
       case self::ACTION_EDGE:
       case self::ACTION_DEPENDENCIES:
       case self::ACTION_BLOCKS:
       case self::ACTION_ATTACH:
         $edge_type = $this->getEdgeType($object_type, $attach_type);
         break;
     }
 
     if ($request->isFormPost()) {
       $phids = explode(';', $request->getStr('phids'));
       $phids = array_filter($phids);
       $phids = array_values($phids);
 
       if ($edge_type) {
         if (!$object instanceof PhabricatorApplicationTransactionInterface) {
           throw new Exception(
             pht(
               'Expected object ("%s") to implement interface "%s".',
               get_class($object),
               'PhabricatorApplicationTransactionInterface'));
         }
 
         $old_phids = PhabricatorEdgeQuery::loadDestinationPHIDs(
           $this->phid,
           $edge_type);
         $add_phids = $phids;
         $rem_phids = array_diff($old_phids, $add_phids);
 
         $txn_editor = $object->getApplicationTransactionEditor()
           ->setActor($user)
           ->setContentSourceFromRequest($request)
           ->setContinueOnMissingFields(true);
 
         $txn_template = $object->getApplicationTransactionTemplate()
           ->setTransactionType(PhabricatorTransactions::TYPE_EDGE)
           ->setMetadataValue('edge:type', $edge_type)
           ->setNewValue(array(
             '+' => array_fuse($add_phids),
             '-' => array_fuse($rem_phids)));
         $txn_editor->applyTransactions(
           $object->getApplicationTransactionObject(),
           array($txn_template));
 
         return id(new AphrontReloadResponse())->setURI($handle->getURI());
       } else {
         return $this->performMerge($object, $handle, $phids);
       }
     } else {
       if ($edge_type) {
         $phids = PhabricatorEdgeQuery::loadDestinationPHIDs(
           $this->phid,
           $edge_type);
       } else {
         // This is a merge.
         $phids = array();
       }
     }
 
     $strings = $this->getStrings();
 
     $handles = $this->loadViewerHandles($phids);
 
     $obj_dialog = new PhabricatorObjectSelectorDialog();
     $obj_dialog
       ->setUser($user)
       ->setHandles($handles)
       ->setFilters($this->getFilters($strings))
       ->setSelectedFilter($strings['selected'])
       ->setExcluded($this->phid)
       ->setCancelURI($handle->getURI())
       ->setSearchURI('/search/select/'.$attach_type.'/')
       ->setTitle($strings['title'])
       ->setHeader($strings['header'])
       ->setButtonText($strings['button'])
       ->setInstructions($strings['instructions']);
 
     $dialog = $obj_dialog->buildDialog();
 
     return id(new AphrontDialogResponse())->setDialog($dialog);
   }
 
   private function performMerge(
     ManiphestTask $task,
     PhabricatorObjectHandle $handle,
     array $phids) {
 
     $user = $this->getRequest()->getUser();
     $response = id(new AphrontReloadResponse())->setURI($handle->getURI());
 
     $phids = array_fill_keys($phids, true);
     unset($phids[$task->getPHID()]); // Prevent merging a task into itself.
 
     if (!$phids) {
       return $response;
     }
 
     $targets = id(new ManiphestTaskQuery())
       ->setViewer($user)
       ->withPHIDs(array_keys($phids))
       ->execute();
 
     if (empty($targets)) {
       return $response;
     }
 
     $editor = id(new ManiphestTransactionEditor())
       ->setActor($user)
       ->setContentSourceFromRequest($this->getRequest())
       ->setContinueOnNoEffect(true)
       ->setContinueOnMissingFields(true);
 
-    $task_names = array();
-
-    $merge_into_name = 'T'.$task->getID();
-
     $cc_vector = array();
     $cc_vector[] = $task->getCCPHIDs();
     foreach ($targets as $target) {
       $cc_vector[] = $target->getCCPHIDs();
       $cc_vector[] = array(
         $target->getAuthorPHID(),
         $target->getOwnerPHID());
 
-      $close_task = id(new ManiphestTransaction())
-        ->setTransactionType(ManiphestTransaction::TYPE_STATUS)
-        ->setNewValue(ManiphestTaskStatus::getDuplicateStatus());
-
-      $merge_comment = id(new ManiphestTransaction())
-        ->setTransactionType(PhabricatorTransactions::TYPE_COMMENT)
-        ->attachComment(
-          id(new ManiphestTransactionComment())
-            ->setContent("\xE2\x9C\x98 Merged into {$merge_into_name}."));
+      $merged_into_txn = id(new ManiphestTransaction())
+        ->setTransactionType(ManiphestTransaction::TYPE_MERGED_INTO)
+        ->setNewValue($task->getPHID());
 
       $editor->applyTransactions(
         $target,
-        array(
-          $close_task,
-          $merge_comment,
-        ));
+        array($merged_into_txn));
 
-      $task_names[] = 'T'.$target->getID();
     }
     $all_ccs = array_mergev($cc_vector);
     $all_ccs = array_filter($all_ccs);
     $all_ccs = array_unique($all_ccs);
 
-    $task_names = implode(', ', $task_names);
-
     $add_ccs = id(new ManiphestTransaction())
       ->setTransactionType(ManiphestTransaction::TYPE_CCS)
       ->setNewValue($all_ccs);
 
-    $merged_comment = id(new ManiphestTransaction())
-      ->setTransactionType(PhabricatorTransactions::TYPE_COMMENT)
-      ->attachComment(
-        id(new ManiphestTransactionComment())
-          ->setContent("\xE2\x97\x80 Merged tasks: {$task_names}."));
+    $merged_from_txn = id(new ManiphestTransaction())
+      ->setTransactionType(ManiphestTransaction::TYPE_MERGED_FROM)
+      ->setNewValue(mpull($targets, 'getPHID'));
 
-    $editor->applyTransactions($task, array($add_ccs, $merged_comment));
+    $editor->applyTransactions(
+      $task,
+      array($add_ccs, $merged_from_txn));
 
     return $response;
   }
 
   private function getStrings() {
     switch ($this->type) {
       case DifferentialRevisionPHIDType::TYPECONST:
         $noun = 'Revisions';
         $selected = 'created';
         break;
       case ManiphestTaskPHIDType::TYPECONST:
         $noun = 'Tasks';
         $selected = 'assigned';
         break;
       case PhabricatorRepositoryCommitPHIDType::TYPECONST:
         $noun = 'Commits';
         $selected = 'created';
         break;
       case PholioMockPHIDType::TYPECONST:
         $noun = 'Mocks';
         $selected = 'created';
         break;
     }
 
     switch ($this->action) {
       case self::ACTION_EDGE:
       case self::ACTION_ATTACH:
         $dialog_title = "Manage Attached {$noun}";
         $header_text = "Currently Attached {$noun}";
         $button_text = "Save {$noun}";
         $instructions = null;
         break;
       case self::ACTION_MERGE:
         $dialog_title = 'Merge Duplicate Tasks';
         $header_text = 'Tasks To Merge';
         $button_text = "Merge {$noun}";
         $instructions =
           'These tasks will be merged into the current task and then closed. '.
           'The current task will grow stronger.';
         break;
       case self::ACTION_DEPENDENCIES:
         $dialog_title = 'Edit Dependencies';
         $header_text = 'Current Dependencies';
         $button_text = 'Save Dependencies';
         $instructions = null;
         break;
       case self::ACTION_BLOCKS:
         $dialog_title = pht('Edit Blocking Tasks');
         $header_text = pht('Current Blocking Tasks');
         $button_text = pht('Save Blocking Tasks');
         $instructions = null;
         break;
     }
 
     return array(
       'target_plural_noun'    => $noun,
       'selected'              => $selected,
       'title'                 => $dialog_title,
       'header'                => $header_text,
       'button'                => $button_text,
       'instructions'          => $instructions,
     );
   }
 
   private function getFilters(array $strings) {
     if ($this->type == PholioMockPHIDType::TYPECONST) {
       $filters = array(
         'created' => 'Created By Me',
         'all' => 'All '.$strings['target_plural_noun'],
       );
     } else {
       $filters = array(
         'assigned' => 'Assigned to Me',
         'created' => 'Created By Me',
         'open' => 'All Open '.$strings['target_plural_noun'],
         'all' => 'All '.$strings['target_plural_noun'],
       );
     }
 
     return $filters;
   }
 
   private function getEdgeType($src_type, $dst_type) {
     $t_cmit = PhabricatorRepositoryCommitPHIDType::TYPECONST;
     $t_task = ManiphestTaskPHIDType::TYPECONST;
     $t_drev = DifferentialRevisionPHIDType::TYPECONST;
     $t_mock = PholioMockPHIDType::TYPECONST;
 
     $map = array(
       $t_cmit => array(
         $t_task => DiffusionCommitHasTaskEdgeType::EDGECONST,
       ),
       $t_task => array(
         $t_cmit => ManiphestTaskHasCommitEdgeType::EDGECONST,
         $t_task => PhabricatorEdgeConfig::TYPE_TASK_DEPENDS_ON_TASK,
         $t_drev => ManiphestTaskHasRevisionEdgeType::EDGECONST,
         $t_mock => PhabricatorEdgeConfig::TYPE_TASK_HAS_MOCK,
       ),
       $t_drev => array(
         $t_drev => PhabricatorEdgeConfig::TYPE_DREV_DEPENDS_ON_DREV,
         $t_task => DifferentialRevisionHasTaskEdgeType::EDGECONST,
       ),
       $t_mock => array(
         $t_task => PhabricatorEdgeConfig::TYPE_MOCK_HAS_TASK,
       ),
     );
 
     if (empty($map[$src_type][$dst_type])) {
       return null;
     }
 
     return $map[$src_type][$dst_type];
   }
 
   private function raiseGraphCycleException(PhabricatorEdgeCycleException $ex) {
     $cycle = $ex->getCycle();
 
     $handles = $this->loadViewerHandles($cycle);
     $names = array();
     foreach ($cycle as $cycle_phid) {
       $names[] = $handles[$cycle_phid]->getFullName();
     }
     $names = implode(" \xE2\x86\x92 ", $names);
     throw new Exception(
       "You can not create that dependency, because it would create a ".
       "circular dependency: {$names}.");
   }
 
 }
diff --git a/src/infrastructure/internationalization/translation/PhabricatorBaseEnglishTranslation.php b/src/infrastructure/internationalization/translation/PhabricatorBaseEnglishTranslation.php
index 2689ec0efe..8b1f4d1235 100644
--- a/src/infrastructure/internationalization/translation/PhabricatorBaseEnglishTranslation.php
+++ b/src/infrastructure/internationalization/translation/PhabricatorBaseEnglishTranslation.php
@@ -1,1087 +1,1101 @@
 <?php
 
 abstract class PhabricatorBaseEnglishTranslation
   extends PhabricatorTranslation {
 
   final public function getLanguage() {
     return 'en';
   }
 
   public function getTranslations() {
     return array(
       'No daemon(s) with id(s) "%s" exist!' => array(
         'No daemon with id %s exists!',
         'No daemons with ids %s exist!',
       ),
       'These %d configuration value(s) are related:' => array(
         'This configuration value is related:',
         'These configuration values are related:',
       ),
       'Differential Revision(s)' => array(
         'Differential Revision',
         'Differential Revisions',
       ),
       'file(s)' => array('file', 'files'),
       'Maniphest Task(s)' => array('Maniphest Task', 'Maniphest Tasks'),
       'Task(s)' => array('Task', 'Tasks'),
 
       'Please fix these errors and try again.' => array(
         'Please fix this error and try again.',
         'Please fix these errors and try again.',
       ),
 
       '%d Error(s)' => array('%d Error', '%d Errors'),
       '%d Warning(s)' => array('%d Warning', '%d Warnings'),
       '%d Auto-Fix(es)' => array('%d Auto-Fix', '%d Auto-Fixes'),
       '%d Advice(s)' => array('%d Advice', '%d Pieces of Advice'),
       '%d Detail(s)' => array('%d Detail', '%d Details'),
 
       '(%d line(s))' => array('(%d line)', '(%d lines)'),
 
       'COMMIT(S)' => array('COMMIT', 'COMMITS'),
 
       '%d line(s)' => array('%d line', '%d lines'),
       '%d path(s)' => array('%d path', '%d paths'),
       '%d diff(s)' => array('%d diff', '%d diffs'),
 
       'added %d commit(s): %s' => array(
         'added commit: %2$s',
         'added commits: %2$s',
       ),
 
       'removed %d commit(s): %s' => array(
         'removed commit: %2$s',
         'removed commits: %2$s',
       ),
 
       'changed %d commit(s), added %d: %s; removed %d: %s' =>
         'changed commits, added: %3$s; removed: %5$s',
 
       'ATTACHED %d COMMIT(S)' => array(
         'ATTACHED COMMIT',
         'ATTACHED COMMITS',
       ),
 
       'added %d mock(s): %s' => array(
         'added a mock: %2$s',
         'added mocks: %2$s',
       ),
 
       'removed %d mock(s): %s' => array(
         'removed a mock: %2$s',
         'removed mocks: %2$s',
       ),
 
       'changed %d mock(s), added %d: %s; removed %d: %s' =>
         'changed mocks, added: %3$s; removed: %5$s',
 
       'ATTACHED %d MOCK(S)' => array(
         'ATTACHED MOCK',
         'ATTACHED MOCKS',
       ),
 
       'added %d dependencie(s): %s' => array(
         'added dependency: %2$s',
         'added dependencies: %2$s',
       ),
 
       'added %d dependent task(s): %s' => array(
         'added dependent task: %2$s',
         'added dependent tasks: %2$s',
       ),
 
       'removed %d dependencie(s): %s' => array(
         'removed dependency: %2$s',
         'removed dependencies: %2$s',
       ),
 
       'removed %d dependent task(s): %s' => array(
         'removed dependent task: %2$s',
         'removed dependent tasks: %2$s',
       ),
 
       'changed %d dependencie(s), added %d: %s; removed %d: %s' =>
         'changed dependencies, added: %3$s; removed: %5$s',
 
       'changed %d dependent task(s), added %d: %s; removed %d: %s',
         'changed dependent tasks, added: %3$s; removed: %5$s',
 
       'DEPENDENT %d TASK(s)' => array(
         'DEPENDENT TASK',
         'DEPENDENT TASKS',
       ),
 
       'DEPENDS ON %d TASK(S)' => array(
         'DEPENDS ON TASK',
         'DEPENDS ON TASKS',
       ),
 
       'DIFFERENTIAL %d REVISION(S)' => array(
         'DIFFERENTIAL REVISION',
         'DIFFERENTIAL REVISIONS',
       ),
 
       'added %d revision(s): %s' => array(
         'added revision: %2$s',
         'added revisions: %2$s',
       ),
 
       'removed %d revision(s): %s' => array(
         'removed revision: %2$s',
         'removed revisions: %2$s',
       ),
 
       'changed %d revision(s), added %d: %s; removed %d: %s' =>
         'changed revisions, added %3$s; removed %5$s',
 
       '%s edited revision(s), added %d: %s; removed %d: %s.' =>
         '%s edited revisions, added: %3$s; removed: %5$s',
 
       'There are %d raw fact(s) in storage.' => array(
         'There is %d raw fact in storage.',
         'There are %d raw facts in storage.',
       ),
 
       'There are %d aggregate fact(s) in storage.' => array(
         'There is %d aggregate fact in storage.',
         'There are %d aggregate facts in storage.',
       ),
 
       '%d Commit(s) Awaiting Audit' => array(
         '%d Commit Awaiting Audit',
         '%d Commits Awaiting Audit',
       ),
 
       '%d Problem Commit(s)' => array(
         '%d Problem Commit',
         '%d Problem Commits',
       ),
 
       '%d Review(s) Blocking Others' => array(
         '%d Review Blocking Others',
         '%d Reviews Blocking Others',
       ),
 
       '%d Review(s) Need Attention' => array(
         '%d Review Needs Attention',
         '%d Reviews Need Attention',
       ),
 
       '%d Review(s) Waiting on Others' => array(
         '%d Review Waiting on Others',
         '%d Reviews Waiting on Others',
       ),
 
       '%d Flagged Object(s)' => array(
         '%d Flagged Object',
         '%d Flagged Objects',
       ),
 
       '%d Unbreak Now Task(s)!' => array(
         '%d Unbreak Now Task!',
         '%d Unbreak Now Tasks!',
       ),
 
       '%d Assigned Task(s)' => array(
         '%d Assigned Task',
         '%d Assigned Tasks',
       ),
 
       'Show %d Lint Message(s)' => array(
         'Show %d Lint Message',
         'Show %d Lint Messages',
       ),
       'Hide %d Lint Message(s)' => array(
         'Hide %d Lint Message',
         'Hide %d Lint Messages',
       ),
       'Switch for %d Lint Message(s)' => array(
         'Switch for %d Lint Message',
         'Switch for %d Lint Messages',
       ),
       '%d Lint Message(s)' => array(
         '%d Lint Message',
         '%d Lint Messages',
       ),
 
       'This is a binary file. It is %s byte(s) in length.' => array(
         'This is a binary file. It is %s byte in length.',
         'This is a binary file. It is %s bytes in length.',
       ),
 
       '%d Action(s) Have No Effect' => array(
         'Action Has No Effect',
         'Actions Have No Effect',
       ),
 
       '%d Action(s) With No Effect' => array(
         'Action With No Effect',
         'Actions With No Effect',
       ),
 
       'Some of your %d action(s) have no effect:' => array(
         'One of your actions has no effect:',
         'Some of your actions have no effect:',
       ),
 
       'Apply remaining %d action(s)?' => array(
         'Apply remaining action?',
         'Apply remaining actions?',
       ),
 
       'Apply %d Other Action(s)' => array(
         'Apply Remaining Action',
         'Apply Remaining Actions',
       ),
 
       'The %d action(s) you are taking have no effect:' => array(
         'The action you are taking has no effect:',
         'The actions you are taking have no effect:',
       ),
 
       '%s edited post(s), added %d: %s; removed %d: %s.' =>
         '%s edited posts, added: %3$s; removed: %5$s',
 
       '%s added %d post(s): %s.' => array(
         array(
           '%s added a post: %3$s.',
           '%s added posts: %3$s.',
         ),
       ),
 
       '%s removed %d post(s): %s.' => array(
         array(
           '%s removed a post: %3$s.',
           '%s removed posts: %3$s.',
         ),
       ),
 
       '%s edited blog(s), added %d: %s; removed %d: %s.' =>
         '%s edited blogs, added: %3$s; removed: %5$s',
 
       '%s added %d blog(s): %s.' => array(
         array(
           '%s added a blog: %3$s.',
           '%s added blogs: %3$s.',
         ),
       ),
 
       '%s removed %d blog(s): %s.' => array(
         array(
           '%s removed a blog: %3$s.',
           '%s removed blogs: %3$s.',
         ),
       ),
 
       '%s edited blogger(s), added %d: %s; removed %d: %s.' =>
         '%s edited bloggers, added: %3$s; removed: %5$s',
 
       '%s added %d blogger(s): %s.' => array(
         array(
           '%s added a blogger: %3$s.',
           '%s added bloggers: %3$s.',
         ),
       ),
 
       '%s removed %d blogger(s): %s.' => array(
         array(
           '%s removed a blogger: %3$s.',
           '%s removed bloggers: %3$s.',
         ),
       ),
 
       '%s edited member(s), added %d: %s; removed %d: %s.' =>
         '%s edited members, added: %3$s; removed: %5$s',
 
       '%s added %d member(s): %s.' => array(
         array(
           '%s added a member: %3$s.',
           '%s added members: %3$s.',
         ),
       ),
 
       '%s removed %d member(s): %s.' => array(
         array(
           '%s removed a member: %3$s.',
           '%s removed members: %3$s.',
         ),
       ),
 
       '%s edited project(s), added %d: %s; removed %d: %s.' =>
         '%s edited projects, added: %3$s; removed: %5$s',
 
       '%s added %d project(s): %s.' => array(
         array(
           '%s added a project: %3$s.',
           '%s added projects: %3$s.',
         ),
       ),
 
       '%s removed %d project(s): %s.' => array(
         array(
           '%s removed a project: %3$s.',
           '%s removed projects: %3$s.',
         ),
       ),
 
       '%s changed project(s) of %s, added %d: %s; removed %d: %s' =>
         '%s changed projects of %s, added: %4$s; removed: %6$s',
 
       '%s added %d project(s) to %s: %s' => array(
         array(
           '%s added a project to %3$s: %4$s',
           '%s added projects to %3$s: %4$s',
         ),
       ),
 
       '%s removed %d project(s) from %s: %s' => array(
         array(
           '%s removed a project from %3$s: %4$s',
           '%s removed projects from %3$s: %4$s',
         ),
       ),
 
+      '%s merged %d task(s): %s.' => array(
+        array(
+          '%s merged a task: %3$s.',
+          '%s merged tasks: %3$s.',
+        ),
+      ),
+
+      '%s merged %d task(s) %s into %s.' => array(
+        array(
+          '%s merged %3$s into %4$s.',
+          '%s merged tasks %3$s into %4$s.',
+        ),
+      ),
+
       '%s edited voting user(s), added %d: %s; removed %d: %s.' =>
         '%s edited voting users, added: %3$s; removed: %5$s',
 
       '%s added %d voting user(s): %s.' => array(
         array(
           '%s added a voting user: %3$s.',
           '%s added voting users: %3$s.',
         ),
       ),
 
       '%s removed %d voting user(s): %s.' => array(
         array(
           '%s removed a voting user: %3$s.',
           '%s removed voting users: %3$s.',
         ),
       ),
 
       '%s added %d blocking task(s): %s.' => array(
         array(
           '%s added a blocking task: %3$s.',
           '%s added blocking tasks: %3$s.'
         ),
       ),
 
       '%s added %d blocked task(s): %s.' => array(
         array(
           '%s added a blocked task: %3$s.',
           '%s added blocked tasks: %3$s.'
         )
       ),
 
       '%s removed %d blocking task(s): %s.' => array(
         array(
           '%s removed a blocking task: %3$s.',
           '%s removed blocking tasks: %3$s.'
         ),
       ),
 
       '%s removed %d blocked task(s): %s.' => array(
         array(
           '%s removed a blocked task: %3$s.',
           '%s removed blocked tasks: %3$s.'
         )
       ),
 
       '%s edited answer(s), added %d: %s; removed %d: %s.' =>
         '%s edited answers, added: %3$s; removed: %5$s',
 
       '%s added %d answer(s): %s.' => array(
         array(
           '%s added an answer: %3$s.',
           '%s added answers: %3$s.',
         ),
       ),
 
       '%s removed %d answer(s): %s.' => array(
         array(
           '%s removed a answer: %3$s.',
           '%s removed answers: %3$s.',
         ),
       ),
 
      '%s edited question(s), added %d: %s; removed %d: %s.' =>
         '%s edited questions, added: %3$s; removed: %5$s',
 
       '%s added %d question(s): %s.' => array(
         array(
           '%s added a question: %3$s.',
           '%s added questions: %3$s.',
         ),
       ),
 
       '%s removed %d question(s): %s.' => array(
         array(
           '%s removed a question: %3$s.',
           '%s removed questions: %3$s.',
         ),
       ),
 
       '%s edited mock(s), added %d: %s; removed %d: %s.' =>
         '%s edited mocks, added: %3$s; removed: %5$s',
 
       '%s added %d mock(s): %s.' => array(
         array(
           '%s added a mock: %3$s.',
           '%s added mocks: %3$s.',
         ),
       ),
 
       '%s removed %d mock(s): %s.' => array(
         array(
           '%s removed a mock: %3$s.',
           '%s removed mocks: %3$s.',
         ),
       ),
 
       '%s edited task(s), added %d: %s; removed %d: %s.' =>
         '%s edited tasks, added: %3$s; removed: %5$s',
 
       '%s added %d task(s): %s.' => array(
         array(
           '%s added a task: %3$s.',
           '%s added tasks: %3$s.',
         ),
       ),
 
       '%s removed %d task(s): %s.' => array(
         array(
           '%s removed a task: %3$s.',
           '%s removed tasks: %3$s.',
         ),
       ),
 
       '%s edited file(s), added %d: %s; removed %d: %s.' =>
         '%s edited files, added: %3$s; removed: %5$s',
 
       '%s added %d file(s): %s.' => array(
         array(
           '%s added a file: %3$s.',
           '%s added files: %3$s.',
         ),
       ),
 
       '%s removed %d file(s): %s.' => array(
         array(
           '%s removed a file: %3$s.',
           '%s removed files: %3$s.',
         ),
       ),
 
       '%s edited account(s), added %d: %s; removed %d: %s.' =>
         '%s edited accounts, added: %3$s; removed: %5$s',
 
       '%s added %d account(s): %s.' => array(
         array(
           '%s added a account: %3$s.',
           '%s added accounts: %3$s.',
         ),
       ),
 
       '%s removed %d account(s): %s.' => array(
         array(
           '%s removed a account: %3$s.',
           '%s removed accounts: %3$s.',
         ),
       ),
 
       '%s edited charge(s), added %d: %s; removed %d: %s.' =>
         '%s edited charges, added: %3$s; removed: %5$s',
 
       '%s added %d charge(s): %s.' => array(
         array(
           '%s added a charge: %3$s.',
           '%s added charges: %3$s.',
         ),
       ),
 
       '%s removed %d charge(s): %s.' => array(
         array(
           '%s removed a charge: %3$s.',
           '%s removed charges: %3$s.',
         ),
       ),
 
       '%s edited purchase(s), added %d: %s; removed %d: %s.' =>
         '%s edited purchases, added: %3$s; removed: %5$s',
 
       '%s added %d purchase(s): %s.' => array(
         array(
           '%s added a purchase: %3$s.',
           '%s added purchases: %3$s.',
         ),
       ),
 
       '%s removed %d purchase(s): %s.' => array(
         array(
           '%s removed a purchase: %3$s.',
           '%s removed purchases: %3$s.',
         ),
       ),
 
       '%s edited contributor(s), added %d: %s; removed %d: %s.' =>
         '%s edited contributors, added: %3$s; removed: %5$s',
 
       '%s added %d contributor(s): %s.' => array(
         array(
           '%s added a contributor: %3$s.',
           '%s added contributors: %3$s.',
         ),
       ),
 
       '%s removed %d contributor(s): %s.' => array(
         array(
           '%s removed a contributor: %3$s.',
           '%s removed contributors: %3$s.',
         ),
       ),
 
       '%s edited reviewer(s), added %d: %s; removed %d: %s.' =>
         '%s edited reviewers, added: %3$s; removed: %5$s',
 
       '%s added %d reviewer(s): %s.' => array(
         array(
           '%s added a reviewer: %3$s.',
           '%s added reviewers: %3$s.',
         ),
       ),
 
       '%s removed %d reviewer(s): %s.' => array(
         array(
           '%s removed a reviewer: %3$s.',
           '%s removed reviewers: %3$s.',
         ),
       ),
 
       '%s edited object(s), added %d: %s; removed %d: %s.' =>
         '%s edited objects, added: %3$s; removed: %5$s',
 
       '%s added %d object(s): %s.' => array(
         array(
           '%s added a object: %3$s.',
           '%s added objects: %3$s.',
         ),
       ),
 
       '%s removed %d object(s): %s.' => array(
         array(
           '%s removed a object: %3$s.',
           '%s removed objects: %3$s.',
         ),
       ),
 
       '%d other(s)' => array(
         '1 other',
         '%d others',
       ),
 
       '%s edited subscriber(s), added %d: %s; removed %d: %s.' =>
         '%s edited subscribers, added: %3$s; removed: %5$s',
 
       '%s added %d subscriber(s): %s.' => array(
         array(
           '%s added a subscriber: %3$s.',
           '%s added subscribers: %3$s.',
         ),
       ),
 
       '%s removed %d subscriber(s): %s.' => array(
         array(
           '%s removed a subscriber: %3$s.',
           '%s removed subscribers: %3$s.',
         ),
       ),
 
       '%s edited unsubscriber(s), added %d: %s; removed %d: %s.' =>
         '%s edited unsubscribers, added: %3$s; removed: %5$s',
 
       '%s added %d unsubscriber(s): %s.' => array(
         array(
           '%s added a unsubscriber: %3$s.',
           '%s added unsubscribers: %3$s.',
         ),
       ),
 
       '%s removed %d unsubscriber(s): %s.' => array(
         array(
           '%s removed a unsubscriber: %3$s.',
           '%s removed unsubscribers: %3$s.',
         ),
       ),
 
       '%s edited participant(s), added %d: %s; removed %d: %s.' =>
         '%s edited participants, added: %3$s; removed: %5$s',
 
       '%s added %d participant(s): %s.' => array(
         array(
           '%s added a participant: %3$s.',
           '%s added participants: %3$s.',
         ),
       ),
 
       '%s removed %d participant(s): %s.' => array(
         array(
           '%s removed a participant: %3$s.',
           '%s removed participants: %3$s.',
         ),
       ),
 
       '%s edited image(s), added %d: %s; removed %d: %s.' =>
         '%s edited images, added: %3$s; removed: %5$s',
 
       '%s added %d image(s): %s.' => array(
         array(
           '%s added an image: %3$s.',
           '%s added images: %3$s.',
         ),
       ),
 
       '%s removed %d image(s): %s.' => array(
         array(
           '%s removed an image: %3$s.',
           '%s removed images: %3$s.',
         ),
       ),
 
       '%d people(s)' => array(
         array(
           '%d person',
           '%d people',
         ),
       ),
 
       '%s Line(s)' => array(
         '%s Line',
         '%s Lines',
       ),
 
       'Indexing %d object(s) of type %s.' => array(
         'Indexing %d object of type %s.',
         'Indexing %d object of type %s.',
       ),
 
       'Run these %d command(s):' => array(
         'Run this command:',
         'Run these commands:',
       ),
 
       'Install these %d PHP extension(s):' => array(
         'Install this PHP extension:',
         'Install these PHP extensions:',
       ),
 
       'The current Phabricator configuration has these %d value(s):' => array(
         'The current Phabricator configuration has this value:',
         'The current Phabricator configuration has these values:',
       ),
 
       'The current MySQL configuration has these %d value(s):' => array(
         'The current MySQL configuration has this value:',
         'The current MySQL configuration has these values:',
       ),
 
       'To update these %d value(s), run these command(s) from the command line:'
       => array(
         'To update this value, run this command from the command line:',
         'To update these values, run these commands from the command line:',
       ),
 
       'You can update these %d value(s) here:' => array(
         'You can update this value here:',
         'You can update these values here:',
       ),
 
       'The current PHP configuration has these %d value(s):' => array(
         'The current PHP configuration has this value:',
         'The current PHP configuration has these values:',
       ),
 
       'To update these %d value(s), edit your PHP configuration file.' => array(
         'To update this %d value, edit your PHP configuration file.',
         'To update these %d values, edit your PHP configuration file.',
       ),
 
       'To update these %d value(s), edit your PHP configuration file, located '.
       'here:' => array(
         'To update this value, edit your PHP configuration file, located '.
         'here:',
         'To update these values, edit your PHP configuration file, located '.
         'here:',
       ),
 
       'PHP also loaded these configuration file(s):' => array(
         'PHP also loaded this configuration file:',
         'PHP also loaded these configuration files:',
       ),
 
       'You have %d unresolved setup issue(s)...' => array(
         'You have an unresolved setup issue...',
         'You have %d unresolved setup issues...',
       ),
 
       '%s added %d inline comment(s).' => array(
         array(
           '%s added an inline comment.',
           '%s added inline comments.',
         ),
       ),
 
       '%d comment(s)' => array('%d comment', '%d comments'),
       '%d rejection(s)' => array('%d rejection', '%d rejections'),
       '%d update(s)' => array('%d update', '%d updates'),
 
       'This configuration value is defined in these %d '.
       'configuration source(s): %s.' => array(
         'This configuration value is defined in this '.
         'configuration source: %2$s.',
         'This configuration value is defined in these %d '.
         'configuration sources: %s.',
       ),
 
       '%d Open Pull Request(s)' => array(
         '%d Open Pull Request',
         '%d Open Pull Requests',
       ),
 
       'Stale (%s day(s))' => array(
         'Stale (%s day)',
         'Stale (%s days)',
       ),
 
       'Old (%s day(s))' => array(
         'Old (%s day)',
         'Old (%s days)',
       ),
 
       '%s Commit(s)' => array(
         '%s Commit',
         '%s Commits',
       ),
 
       '%s added %d project(s): %s' => array(
         array(
           '%s added a project: %3$s',
           '%s added projects: %3$s',
         ),
       ),
 
       '%s removed %d project(s): %s' => array(
         array(
           '%s removed a project: %3$s',
           '%s removed projects: %3$s',
         ),
       ),
 
       '%s changed project(s), added %d: %s; removed %d: %s' =>
         '%s changed projects, added: %3$s; removed: %5$s',
 
       '%s attached %d file(s): %s' => array(
         array(
           '%s attached a file: %3$s',
           '%s attached files: %3$s',
         ),
       ),
 
       '%s detached %d file(s): %s' => array(
         array(
           '%s detached a file: %3$s',
           '%s detached files: %3$s',
         ),
       ),
 
       '%s changed file(s), attached %d: %s; detached %d: %s' =>
         '%s changed files, attached: %3$s; detached: %5$s',
 
 
       '%s added %d dependencie(s): %s.' => array(
         array(
           '%s added a dependency: %3$s',
           '%s added dependencies: %3$s',
         ),
       ),
 
       '%s added %d dependent task(s): %s.' => array(
         array(
           '%s added a dependent task: %3$s',
           '%s added dependent tasks: %3$s',
         ),
       ),
 
       '%s removed %d dependencie(s): %s.' => array(
         array(
           '%s removed a dependency: %3$s.',
           '%s removed dependencies: %3$s.',
         ),
       ),
 
       '%s removed %d dependent task(s): %s.' => array(
         array(
           '%s removed a dependent task: %3$s.',
           '%s removed dependent tasks: %3$s.',
         ),
       ),
 
       '%s added %d revision(s): %s.' => array(
         array(
           '%s added a revision: %3$s.',
           '%s added revisions: %3$s.',
         ),
       ),
 
       '%s removed %d revision(s): %s.' => array(
         array(
           '%s removed a revision: %3$s.',
           '%s removed revisions: %3$s.',
         ),
       ),
 
       '%s added %d commit(s): %s.' => array(
         array(
           '%s added a commit: %3$s.',
           '%s added commits: %3$s.',
         ),
       ),
 
       '%s removed %d commit(s): %s.' => array(
         array(
           '%s removed a commit: %3$s.',
           '%s removed commits: %3$s.',
         ),
       ),
 
       '%s edited commit(s), added %d: %s; removed %d: %s.' =>
         '%s edited commits, added %3$s; removed %5$s.',
 
       '%s changed project member(s), added %d: %s; removed %d: %s' =>
         '%s changed project members, added %3$s; removed %5$s',
 
       '%s added %d project member(s): %s' => array(
         array(
           '%s added a member: %3$s',
           '%s added members: %3$s',
         ),
       ),
 
       '%s removed %d project member(s): %s' => array(
         array(
           '%s removed a member: %3$s',
           '%s removed members: %3$s',
         ),
       ),
 
       '%d project hashtag(s) are already used: %s' => array(
           'Project hashtag %2$s is already used.',
           '%d project hashtags are already used: %2$s',
       ),
 
       '%s changed project hashtag(s), added %d: %s; removed %d: %s' =>
         '%s changed project hashtags, added %3$s; removed %5$s',
 
       '%s added %d project hashtag(s): %s' => array(
         array(
           '%s added a hashtag: %3$s',
           '%s added hashtags: %3$s',
         ),
       ),
 
       '%s removed %d project hashtag(s): %s' => array(
         array(
           '%s removed a hashtag: %3$s',
           '%s removed hashtags: %3$s',
         ),
       ),
 
       '%d User(s) Need Approval' => array(
         '%d User Needs Approval',
         '%d Users Need Approval',
       ),
 
       '%s older changes(s) are hidden.' => array(
         '%d older change is hidden.',
         '%d older changes are hidden.',
       ),
 
       '%s, %s line(s)' => array(
         '%s, %s line',
         '%s, %s lines',
       ),
 
       '%s pushed %d commit(s) to %s.' => array(
         array(
           '%s pushed a commit to %3$s.',
           '%s pushed %d commits to %s.',
         ),
       ),
 
       '%s commit(s)' => array(
         '1 commit',
         '%s commits',
       ),
 
       '%s removed %d JIRA issue(s): %s.' => array(
         array(
           '%s removed a JIRA issue: %3$s.',
           '%s removed JIRA issues: %3$s.',
         ),
       ),
 
       '%s added %d JIRA issue(s): %s.' => array(
         array(
           '%s added a JIRA issue: %3$s.',
           '%s added JIRA issues: %3$s.',
         ),
       ),
 
       '%s added %d required legal document(s): %s.' => array(
         array(
           '%s added a required legal document: %3$s.',
           '%s added required legal documents: %3$s.',
         ),
       ),
 
       '%s updated JIRA issue(s): added %d %s; removed %d %s.' =>
         '%s updated JIRA issues: added %3$s; removed %5$s.',
 
       '%s added %s task(s): %s.' => array(
         array(
           '%s added a task: %3$s.',
           '%s added tasks: %3$s.',
         ),
       ),
 
       '%s removed %s task(s): %s.' => array(
         array(
           '%s removed a task: %3$s.',
           '%s removed tasks: %3$s.',
         ),
       ),
 
       '%s edited %s task(s), added %s: %s; removed %s: %s.' =>
         '%s edited tasks, added %4$s; removed %6$s.',
 
       '%s added %s task(s) to %s: %s.' => array(
         array(
           '%s added a task to %3$s: %4$s.',
           '%s added tasks to %3$s: %4$s.',
         ),
       ),
 
       '%s removed %s task(s) from %s: %s.' => array(
         array(
           '%s removed a task from %3$s: %4$s.',
           '%s removed tasks from %3$s: %4$s.',
         ),
       ),
 
       '%s edited %s task(s) for %s, added %s: %s; removed %s: %s.' =>
         '%s edited tasks for %3$s, added: %5$s; removed %7$s.',
 
       '%s added %s commit(s): %s.' => array(
         array(
           '%s added a commit: %3$s.',
           '%s added commits: %3$s.',
         ),
       ),
 
       '%s removed %s commit(s): %s.' => array(
         array(
           '%s removed a commit: %3$s.',
           '%s removed commits: %3$s.',
         ),
       ),
 
       '%s edited %s commit(s), added %s: %s; removed %s: %s.' =>
         '%s edited commits, added %4$s; removed %6$s.',
 
       '%s added %s commit(s) to %s: %s.' => array(
         array(
           '%s added a commit to %3$s: %4$s.',
           '%s added commits to %3$s: %4$s.',
         ),
       ),
 
       '%s removed %s commit(s) from %s: %s.' => array(
         array(
           '%s removed a commit from %3$s: %4$s.',
           '%s removed commits from %3$s: %4$s.',
         ),
       ),
 
       '%s edited %s commit(s) for %s, added %s: %s; removed %s: %s.' =>
         '%s edited commits for %3$s, added: %5$s; removed %7$s.',
 
       '%s added %s revision(s): %s.' => array(
         array(
           '%s added a revision: %3$s.',
           '%s added revisionss: %3$s.',
         ),
       ),
 
       '%s removed %s revision(s): %s.' => array(
         array(
           '%s removed a revision: %3$s.',
           '%s removed revisions: %3$s.',
         ),
       ),
 
       '%s edited %s revision(s), added %s: %s; removed %s: %s.' =>
         '%s edited revisions, added %4$s; removed %6$s.',
 
       '%s added %s revision(s) to %s: %s.' => array(
         array(
           '%s added a revision to %3$s: %4$s.',
           '%s added revisions to %3$s: %4$s.',
         ),
       ),
 
       '%s removed %s revision(s) from %s: %s.' => array(
         array(
           '%s removed a revision from %3$s: %4$s.',
           '%s removed revisions from %3$s: %4$s.',
         ),
       ),
 
       '%s edited %s revision(s) for %s, added %s: %s; removed %s: %s.' =>
         '%s edited revisions for %3$s, added: %5$s; removed %7$s.',
 
       '%s added %s project(s): %s.' => array(
         array(
           '%s added a project: %3$s.',
           '%s added projects: %3$s.',
         ),
       ),
 
       '%s removed %s project(s): %s.' => array(
         array(
           '%s removed a project: %3$s.',
           '%s removed projects: %3$s.',
         ),
       ),
 
       '%s edited %s project(s), added %s: %s; removed %s: %s.' =>
         '%s edited projects, added %4$s; removed %6$s.',
 
       '%s added %s project(s) to %s: %s.' => array(
         array(
           '%s added a project to %3$s: %4$s.',
           '%s added projects to %3$s: %4$s.',
         ),
       ),
 
       '%s removed %s project(s) from %s: %s.' => array(
         array(
           '%s removed a project from %3$s: %4$s.',
           '%s removed projects from %3$s: %4$s.',
         ),
       ),
 
       '%s edited %s project(s) for %s, added %s: %s; removed %s: %s.' =>
         '%s edited projects for %3$s, added: %5$s; removed %7$s.',
 
     );
   }
 
 }