diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -3636,6 +3636,7 @@
     'PhabricatorProjectEditController' => 'applications/project/controller/PhabricatorProjectEditController.php',
     'PhabricatorProjectEditEngine' => 'applications/project/engine/PhabricatorProjectEditEngine.php',
     'PhabricatorProjectEditPictureController' => 'applications/project/controller/PhabricatorProjectEditPictureController.php',
+    'PhabricatorProjectFilterTransaction' => 'applications/project/xaction/PhabricatorProjectFilterTransaction.php',
     'PhabricatorProjectFulltextEngine' => 'applications/project/search/PhabricatorProjectFulltextEngine.php',
     'PhabricatorProjectHeraldAction' => 'applications/project/herald/PhabricatorProjectHeraldAction.php',
     'PhabricatorProjectHeraldAdapter' => 'applications/project/herald/PhabricatorProjectHeraldAdapter.php',
@@ -3694,6 +3695,7 @@
     'PhabricatorProjectSilencedEdgeType' => 'applications/project/edge/PhabricatorProjectSilencedEdgeType.php',
     'PhabricatorProjectSlug' => 'applications/project/storage/PhabricatorProjectSlug.php',
     'PhabricatorProjectSlugsTransaction' => 'applications/project/xaction/PhabricatorProjectSlugsTransaction.php',
+    'PhabricatorProjectSortTransaction' => 'applications/project/xaction/PhabricatorProjectSortTransaction.php',
     'PhabricatorProjectStandardCustomField' => 'applications/project/customfield/PhabricatorProjectStandardCustomField.php',
     'PhabricatorProjectStatus' => 'applications/project/constants/PhabricatorProjectStatus.php',
     'PhabricatorProjectStatusTransaction' => 'applications/project/xaction/PhabricatorProjectStatusTransaction.php',
@@ -9082,6 +9084,7 @@
     'PhabricatorProjectEditController' => 'PhabricatorProjectController',
     'PhabricatorProjectEditEngine' => 'PhabricatorEditEngine',
     'PhabricatorProjectEditPictureController' => 'PhabricatorProjectController',
+    'PhabricatorProjectFilterTransaction' => 'PhabricatorProjectTransactionType',
     'PhabricatorProjectFulltextEngine' => 'PhabricatorFulltextEngine',
     'PhabricatorProjectHeraldAction' => 'HeraldAction',
     'PhabricatorProjectHeraldAdapter' => 'HeraldAdapter',
@@ -9139,6 +9142,7 @@
     'PhabricatorProjectSilencedEdgeType' => 'PhabricatorEdgeType',
     'PhabricatorProjectSlug' => 'PhabricatorProjectDAO',
     'PhabricatorProjectSlugsTransaction' => 'PhabricatorProjectTransactionType',
+    'PhabricatorProjectSortTransaction' => 'PhabricatorProjectTransactionType',
     'PhabricatorProjectStandardCustomField' => array(
       'PhabricatorProjectCustomField',
       'PhabricatorStandardCustomFieldInterface',
diff --git a/src/applications/project/controller/PhabricatorProjectDefaultController.php b/src/applications/project/controller/PhabricatorProjectDefaultController.php
--- a/src/applications/project/controller/PhabricatorProjectDefaultController.php
+++ b/src/applications/project/controller/PhabricatorProjectDefaultController.php
@@ -32,7 +32,7 @@
         $button = pht('Save Default Filter');
 
         $xaction_value = $request->getStr('filter');
-        $xaction_type = PhabricatorProjectTransaction::TYPE_DEFAULT_FILTER;
+        $xaction_type = PhabricatorProjectFilterTransaction::TRANSACTIONTYPE;
         break;
       case 'sort':
         $title = pht('Set Board Default Order');
@@ -43,7 +43,7 @@
         $button = pht('Save Default Order');
 
         $xaction_value = $request->getStr('order');
-        $xaction_type = PhabricatorProjectTransaction::TYPE_DEFAULT_SORT;
+        $xaction_type = PhabricatorProjectSortTransaction::TRANSACTIONTYPE;
         break;
       default:
         return new Aphront404Response();
diff --git a/src/applications/project/editor/PhabricatorProjectTransactionEditor.php b/src/applications/project/editor/PhabricatorProjectTransactionEditor.php
--- a/src/applications/project/editor/PhabricatorProjectTransactionEditor.php
+++ b/src/applications/project/editor/PhabricatorProjectTransactionEditor.php
@@ -30,8 +30,6 @@
     $types[] = PhabricatorTransactions::TYPE_EDIT_POLICY;
     $types[] = PhabricatorTransactions::TYPE_JOIN_POLICY;
 
-    $types[] = PhabricatorProjectTransaction::TYPE_DEFAULT_SORT;
-    $types[] = PhabricatorProjectTransaction::TYPE_DEFAULT_FILTER;
     $types[] = PhabricatorProjectTransaction::TYPE_BACKGROUND;
 
     return $types;
@@ -42,10 +40,6 @@
     PhabricatorApplicationTransaction $xaction) {
 
     switch ($xaction->getTransactionType()) {
-      case PhabricatorProjectTransaction::TYPE_DEFAULT_SORT:
-        return $object->getDefaultWorkboardSort();
-      case PhabricatorProjectTransaction::TYPE_DEFAULT_FILTER:
-        return $object->getDefaultWorkboardFilter();
       case PhabricatorProjectTransaction::TYPE_BACKGROUND:
         return $object->getWorkboardBackgroundColor();
     }
@@ -58,9 +52,6 @@
     PhabricatorApplicationTransaction $xaction) {
 
     switch ($xaction->getTransactionType()) {
-      case PhabricatorProjectTransaction::TYPE_DEFAULT_SORT:
-      case PhabricatorProjectTransaction::TYPE_DEFAULT_FILTER:
-        return $xaction->getNewValue();
       case PhabricatorProjectTransaction::TYPE_BACKGROUND:
         $value = $xaction->getNewValue();
         if (!strlen($value)) {
@@ -77,12 +68,6 @@
     PhabricatorApplicationTransaction $xaction) {
 
     switch ($xaction->getTransactionType()) {
-      case PhabricatorProjectTransaction::TYPE_DEFAULT_SORT:
-        $object->setDefaultWorkboardSort($xaction->getNewValue());
-        return;
-      case PhabricatorProjectTransaction::TYPE_DEFAULT_FILTER:
-        $object->setDefaultWorkboardFilter($xaction->getNewValue());
-        return;
       case PhabricatorProjectTransaction::TYPE_BACKGROUND:
         $object->setWorkboardBackgroundColor($xaction->getNewValue());
         return;
@@ -99,8 +84,6 @@
     $new = $xaction->getNewValue();
 
     switch ($xaction->getTransactionType()) {
-      case PhabricatorProjectTransaction::TYPE_DEFAULT_SORT:
-      case PhabricatorProjectTransaction::TYPE_DEFAULT_FILTER:
       case PhabricatorProjectTransaction::TYPE_BACKGROUND:
         return;
      }
diff --git a/src/applications/project/storage/PhabricatorProjectTransaction.php b/src/applications/project/storage/PhabricatorProjectTransaction.php
--- a/src/applications/project/storage/PhabricatorProjectTransaction.php
+++ b/src/applications/project/storage/PhabricatorProjectTransaction.php
@@ -3,8 +3,6 @@
 final class PhabricatorProjectTransaction
   extends PhabricatorModularTransaction {
 
-  const TYPE_DEFAULT_SORT = 'project:sort';
-  const TYPE_DEFAULT_FILTER = 'project:filter';
   const TYPE_BACKGROUND = 'project:background';
 
   // NOTE: This is deprecated, members are just a normal edge now.
@@ -60,8 +58,6 @@
 
   public function shouldHideForFeed() {
     switch ($this->getTransactionType()) {
-      case self::TYPE_DEFAULT_SORT:
-      case self::TYPE_DEFAULT_FILTER:
       case self::TYPE_BACKGROUND:
         return true;
     }
@@ -69,11 +65,12 @@
     return parent::shouldHideForFeed();
   }
 
+
   public function shouldHideForMail(array $xactions) {
     switch ($this->getTransactionType()) {
       case PhabricatorProjectWorkboardTransaction::TRANSACTIONTYPE:
-      case self::TYPE_DEFAULT_SORT:
-      case self::TYPE_DEFAULT_FILTER:
+      case PhabricatorProjectSortTransaction::TRANSACTIONTYPE:
+      case PhabricatorProjectFilterTransaction::TRANSACTIONTYPE:
       case self::TYPE_BACKGROUND:
         return true;
     }
@@ -140,16 +137,6 @@
         }
         break;
 
-      case self::TYPE_DEFAULT_SORT:
-        return pht(
-          '%s changed the default sort order for the project workboard.',
-          $author_handle);
-
-      case self::TYPE_DEFAULT_FILTER:
-        return pht(
-          '%s changed the default filter for the project workboard.',
-          $author_handle);
-
       case self::TYPE_BACKGROUND:
         return pht(
           '%s changed the background color of the project workboard.',
diff --git a/src/applications/project/xaction/PhabricatorProjectFilterTransaction.php b/src/applications/project/xaction/PhabricatorProjectFilterTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/project/xaction/PhabricatorProjectFilterTransaction.php
@@ -0,0 +1,26 @@
+<?php
+
+final class PhabricatorProjectFilterTransaction
+  extends PhabricatorProjectTransactionType {
+
+  const TRANSACTIONTYPE = 'project:filter';
+
+  public function generateOldValue($object) {
+    return $object->getDefaultWorkboardFilter();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setDefaultWorkboardFilter($value);
+  }
+
+  public function getTitle() {
+    return pht(
+      '%s changed the default filter for the project workboard.',
+      $this->renderAuthor());
+  }
+
+  public function shouldHide() {
+    return true;
+  }
+
+}
diff --git a/src/applications/project/xaction/PhabricatorProjectSortTransaction.php b/src/applications/project/xaction/PhabricatorProjectSortTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/project/xaction/PhabricatorProjectSortTransaction.php
@@ -0,0 +1,26 @@
+<?php
+
+final class PhabricatorProjectSortTransaction
+  extends PhabricatorProjectTransactionType {
+
+  const TRANSACTIONTYPE = 'project:sort';
+
+  public function generateOldValue($object) {
+    return $object->getDefaultWorkboardSort();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setDefaultWorkboardSort($value);
+  }
+
+  public function getTitle() {
+    return pht(
+      '%s changed the default sort order for the project workboard.',
+      $this->renderAuthor());
+  }
+
+  public function shouldHide() {
+    return true;
+  }
+
+}