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
@@ -4551,6 +4551,7 @@
     'PhabricatorConfigEditor' => 'PhabricatorApplicationTransactionEditor',
     'PhabricatorConfigEntry' => array(
       'PhabricatorConfigEntryDAO',
+      'PhabricatorApplicationTransactionInterface',
       'PhabricatorPolicyInterface',
     ),
     'PhabricatorConfigEntryDAO' => 'PhabricatorLiskDAO',
@@ -5212,6 +5213,7 @@
     'PhabricatorPonderApplication' => 'PhabricatorApplication',
     'PhabricatorProject' => array(
       'PhabricatorProjectDAO',
+      'PhabricatorApplicationTransactionInterface',
       'PhabricatorFlaggableInterface',
       'PhabricatorPolicyInterface',
       'PhabricatorSubscribableInterface',
@@ -5226,6 +5228,7 @@
     'PhabricatorProjectBoardViewController' => 'PhabricatorProjectBoardController',
     'PhabricatorProjectColumn' => array(
       'PhabricatorProjectDAO',
+      'PhabricatorApplicationTransactionInterface',
       'PhabricatorPolicyInterface',
       'PhabricatorDestructibleInterface',
     ),
diff --git a/src/applications/config/controller/PhabricatorConfigEditController.php b/src/applications/config/controller/PhabricatorConfigEditController.php
--- a/src/applications/config/controller/PhabricatorConfigEditController.php
+++ b/src/applications/config/controller/PhabricatorConfigEditController.php
@@ -214,21 +214,16 @@
 
     $crumbs->addTextCrumb($this->key, '/config/edit/'.$this->key);
 
-    $xactions = id(new PhabricatorConfigTransactionQuery())
-      ->withObjectPHIDs(array($config_entry->getPHID()))
-      ->setViewer($user)
-      ->execute();
-
-    $xaction_view = id(new PhabricatorApplicationTransactionView())
-      ->setUser($user)
-      ->setObjectPHID($config_entry->getPHID())
-      ->setTransactions($xactions);
+    $timeline = $this->buildTransactionTimeline(
+      $config_entry,
+      new PhabricatorConfigTransactionQuery());
+    $timeline->setShouldTerminate(true);
 
     return $this->buildApplicationPage(
       array(
         $crumbs,
         $form_box,
-        $xaction_view,
+        $timeline,
       ),
       array(
         'title' => $title,
diff --git a/src/applications/config/storage/PhabricatorConfigEntry.php b/src/applications/config/storage/PhabricatorConfigEntry.php
--- a/src/applications/config/storage/PhabricatorConfigEntry.php
+++ b/src/applications/config/storage/PhabricatorConfigEntry.php
@@ -1,7 +1,10 @@
 <?php
 
-final class PhabricatorConfigEntry extends PhabricatorConfigEntryDAO
-  implements PhabricatorPolicyInterface {
+final class PhabricatorConfigEntry
+  extends PhabricatorConfigEntryDAO
+  implements
+    PhabricatorApplicationTransactionInterface,
+    PhabricatorPolicyInterface {
 
   protected $namespace;
   protected $configKey;
@@ -50,6 +53,22 @@
   }
 
 
+/* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
+
+
+  public function getApplicationTransactionEditor() {
+    return new PhabricatorConfigEditor();
+  }
+
+  public function getApplicationTransactionObject() {
+    return $this;
+  }
+
+  public function getApplicationTransactionTemplate() {
+    return new PhabricatorConfigTransaction();
+  }
+
+
 /* -(  PhabricatorPolicyInterface  )----------------------------------------- */
 
 
diff --git a/src/applications/pholio/controller/PholioMockViewController.php b/src/applications/pholio/controller/PholioMockViewController.php
--- a/src/applications/pholio/controller/PholioMockViewController.php
+++ b/src/applications/pholio/controller/PholioMockViewController.php
@@ -38,11 +38,6 @@
       return new Aphront404Response();
     }
 
-    $xactions = id(new PholioTransactionQuery())
-      ->setViewer($user)
-      ->withObjectPHIDs(array($mock->getPHID()))
-      ->execute();
-
     $phids = PhabricatorEdgeQuery::loadDestinationPHIDs(
       $mock->getPHID(),
       PhabricatorEdgeConfig::TYPE_MOCK_HAS_TASK);
@@ -53,14 +48,6 @@
     $engine = id(new PhabricatorMarkupEngine())
       ->setViewer($user);
     $engine->addObject($mock, PholioMock::MARKUP_FIELD_DESCRIPTION);
-    foreach ($xactions as $xaction) {
-      if ($xaction->getComment()) {
-        $engine->addObject(
-          $xaction->getComment(),
-          PhabricatorApplicationTransactionComment::MARKUP_FIELD_COMMENT);
-      }
-    }
-    $engine->process();
 
     $title = $mock->getName();
 
@@ -80,6 +67,12 @@
       ->setStatus($header_icon, $header_color, $header_name)
       ->setPolicyObject($mock);
 
+    $timeline = $this->buildTransactionTimeline(
+      $mock,
+      new PholioTransactionQuery(),
+      $engine);
+    $timeline->setMock($mock);
+
     $actions = $this->buildActionView($mock);
     $properties = $this->buildPropertyView($mock, $engine, $actions);
 
@@ -98,13 +91,6 @@
       ->setHeaderText(pht('Image'))
       ->appendChild($output);
 
-    $xaction_view = id(new PholioTransactionView())
-      ->setUser($this->getRequest()->getUser())
-      ->setMock($mock)
-      ->setObjectPHID($mock->getPHID())
-      ->setTransactions($xactions)
-      ->setMarkupEngine($engine);
-
     $add_comment = $this->buildAddCommentView($mock, $comment_form_id);
 
     $crumbs = $this->buildApplicationCrumbs();
@@ -124,7 +110,7 @@
       $object_box,
       $output,
       $thumb_grid,
-      $xaction_view,
+      $timeline,
       $add_comment,
     );
 
diff --git a/src/applications/project/controller/PhabricatorProjectColumnDetailController.php b/src/applications/project/controller/PhabricatorProjectColumnDetailController.php
--- a/src/applications/project/controller/PhabricatorProjectColumnDetailController.php
+++ b/src/applications/project/controller/PhabricatorProjectColumnDetailController.php
@@ -41,18 +41,10 @@
       return new Aphront404Response();
     }
 
-    $xactions = id(new PhabricatorProjectColumnTransactionQuery())
-      ->setViewer($viewer)
-      ->withObjectPHIDs(array($column->getPHID()))
-      ->execute();
-
-    $engine = id(new PhabricatorMarkupEngine())
-      ->setViewer($viewer);
-
-    $timeline = id(new PhabricatorApplicationTransactionView())
-      ->setUser($viewer)
-      ->setObjectPHID($column->getPHID())
-      ->setTransactions($xactions);
+    $timeline = $this->buildTransactionTimeline(
+      $column,
+      new PhabricatorProjectColumnTransactionQuery());
+    $timeline->setShouldTerminate(true);
 
     $title = pht('%s', $column->getDisplayName());
     $crumbs = $this->buildApplicationCrumbs();
diff --git a/src/applications/project/controller/PhabricatorProjectEditMainController.php b/src/applications/project/controller/PhabricatorProjectEditMainController.php
--- a/src/applications/project/controller/PhabricatorProjectEditMainController.php
+++ b/src/applications/project/controller/PhabricatorProjectEditMainController.php
@@ -48,16 +48,10 @@
       ->setHeader($header)
       ->addPropertyList($properties);
 
-    $xactions = id(new PhabricatorProjectTransactionQuery())
-      ->setViewer($viewer)
-      ->withObjectPHIDs(array($project->getPHID()))
-      ->execute();
-
-    $timeline = id(new PhabricatorApplicationTransactionView())
-      ->setUser($viewer)
-      ->setObjectPHID($project->getPHID())
-      ->setShouldTerminate(true)
-      ->setTransactions($xactions);
+    $timeline = $this->buildTransactionTimeline(
+      $project,
+      new PhabricatorProjectTransactionQuery());
+    $timeline->setShouldTerminate(true);
 
     return $this->buildApplicationPage(
       array(
diff --git a/src/applications/project/storage/PhabricatorProject.php b/src/applications/project/storage/PhabricatorProject.php
--- a/src/applications/project/storage/PhabricatorProject.php
+++ b/src/applications/project/storage/PhabricatorProject.php
@@ -2,6 +2,7 @@
 
 final class PhabricatorProject extends PhabricatorProjectDAO
   implements
+    PhabricatorApplicationTransactionInterface,
     PhabricatorFlaggableInterface,
     PhabricatorPolicyInterface,
     PhabricatorSubscribableInterface,
@@ -359,6 +360,22 @@
   }
 
 
+/* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
+
+
+  public function getApplicationTransactionEditor() {
+    return new PhabricatorProjectTransactionEditor();
+  }
+
+  public function getApplicationTransactionObject() {
+    return $this;
+  }
+
+  public function getApplicationTransactionTemplate() {
+    return new PhabricatorProjectTransaction();
+  }
+
+
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
 
   public function destroyObjectPermanently(
diff --git a/src/applications/project/storage/PhabricatorProjectColumn.php b/src/applications/project/storage/PhabricatorProjectColumn.php
--- a/src/applications/project/storage/PhabricatorProjectColumn.php
+++ b/src/applications/project/storage/PhabricatorProjectColumn.php
@@ -3,6 +3,7 @@
 final class PhabricatorProjectColumn
   extends PhabricatorProjectDAO
   implements
+    PhabricatorApplicationTransactionInterface,
     PhabricatorPolicyInterface,
     PhabricatorDestructibleInterface {
 
@@ -135,6 +136,22 @@
   }
 
 
+/* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
+
+
+  public function getApplicationTransactionEditor() {
+    return new PhabricatorProjectColumnTransactionEditor();
+  }
+
+  public function getApplicationTransactionObject() {
+    return $this;
+  }
+
+  public function getApplicationTransactionTemplate() {
+    return new PhabricatorProjectColumnTransaction();
+  }
+
+
 /* -(  PhabricatorPolicyInterface  )----------------------------------------- */