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
@@ -3445,7 +3445,6 @@
     'PhabricatorPhurlURL' => 'applications/phurl/storage/PhabricatorPhurlURL.php',
     'PhabricatorPhurlURLAccessController' => 'applications/phurl/controller/PhabricatorPhurlURLAccessController.php',
     'PhabricatorPhurlURLAliasTransaction' => 'applications/phurl/xaction/PhabricatorPhurlURLAliasTransaction.php',
-    'PhabricatorPhurlURLCommentController' => 'applications/phurl/controller/PhabricatorPhurlURLCommentController.php',
     'PhabricatorPhurlURLCreateCapability' => 'applications/phurl/capability/PhabricatorPhurlURLCreateCapability.php',
     'PhabricatorPhurlURLDatasource' => 'applications/phurl/typeahead/PhabricatorPhurlURLDatasource.php',
     'PhabricatorPhurlURLDescriptionTransaction' => 'applications/phurl/xaction/PhabricatorPhurlURLDescriptionTransaction.php',
@@ -8711,7 +8710,6 @@
     ),
     'PhabricatorPhurlURLAccessController' => 'PhabricatorPhurlController',
     'PhabricatorPhurlURLAliasTransaction' => 'PhabricatorPhurlURLTransactionType',
-    'PhabricatorPhurlURLCommentController' => 'PhabricatorPhurlController',
     'PhabricatorPhurlURLCreateCapability' => 'PhabricatorPolicyCapability',
     'PhabricatorPhurlURLDatasource' => 'PhabricatorTypeaheadDatasource',
     'PhabricatorPhurlURLDescriptionTransaction' => 'PhabricatorPhurlURLTransactionType',
diff --git a/src/applications/phurl/application/PhabricatorPhurlApplication.php b/src/applications/phurl/application/PhabricatorPhurlApplication.php
--- a/src/applications/phurl/application/PhabricatorPhurlApplication.php
+++ b/src/applications/phurl/application/PhabricatorPhurlApplication.php
@@ -48,8 +48,6 @@
         'url/' => array(
           $this->getEditRoutePattern('edit/')
             => 'PhabricatorPhurlURLEditController',
-          'comment/(?P<id>[1-9]\d*)/'
-            => 'PhabricatorPhurlURLCommentController',
         ),
       ),
     );
diff --git a/src/applications/phurl/controller/PhabricatorPhurlURLCommentController.php b/src/applications/phurl/controller/PhabricatorPhurlURLCommentController.php
deleted file mode 100644
--- a/src/applications/phurl/controller/PhabricatorPhurlURLCommentController.php
+++ /dev/null
@@ -1,63 +0,0 @@
-<?php
-
-final class PhabricatorPhurlURLCommentController
-  extends PhabricatorPhurlController {
-
-  public function handleRequest(AphrontRequest $request) {
-    if (!$request->isFormPost()) {
-      return new Aphront400Response();
-    }
-
-    $viewer = $request->getViewer();
-    $id = $request->getURIData('id');
-
-    $is_preview = $request->isPreviewRequest();
-    $draft = PhabricatorDraft::buildFromRequest($request);
-
-    $phurl = id(new PhabricatorPhurlURLQuery())
-      ->setViewer($viewer)
-      ->withIDs(array($id))
-      ->executeOne();
-    if (!$phurl) {
-      return new Aphront404Response();
-    }
-
-    $view_uri = '/'.$phurl->getMonogram();
-
-    $xactions = array();
-    $xactions[] = id(new PhabricatorPhurlURLTransaction())
-      ->setTransactionType(PhabricatorTransactions::TYPE_COMMENT)
-      ->attachComment(
-        id(new PhabricatorPhurlURLTransactionComment())
-          ->setContent($request->getStr('comment')));
-
-    $editor = id(new PhabricatorPhurlURLEditor())
-      ->setActor($viewer)
-      ->setContinueOnNoEffect($request->isContinueRequest())
-      ->setContentSourceFromRequest($request)
-      ->setIsPreview($is_preview);
-
-    try {
-      $xactions = $editor->applyTransactions($phurl, $xactions);
-    } catch (PhabricatorApplicationTransactionNoEffectException $ex) {
-      return id(new PhabricatorApplicationTransactionNoEffectResponse())
-        ->setCancelURI($view_uri)
-        ->setException($ex);
-    }
-
-    if ($draft) {
-      $draft->replaceOrDelete();
-    }
-
-    if ($request->isAjax() && $is_preview) {
-      return id(new PhabricatorApplicationTransactionResponse())
-        ->setViewer($viewer)
-        ->setTransactions($xactions)
-        ->setIsPreview($is_preview);
-    } else {
-      return id(new AphrontRedirectResponse())
-        ->setURI($view_uri);
-    }
-  }
-
-}
diff --git a/src/applications/phurl/controller/PhabricatorPhurlURLViewController.php b/src/applications/phurl/controller/PhabricatorPhurlURLViewController.php
--- a/src/applications/phurl/controller/PhabricatorPhurlURLViewController.php
+++ b/src/applications/phurl/controller/PhabricatorPhurlURLViewController.php
@@ -30,6 +30,7 @@
     $timeline = $this->buildTransactionTimeline(
       $url,
       new PhabricatorPhurlURLTransactionQuery());
+    $timeline->setQuoteRef($url->getMonogram());
 
     $header = $this->buildHeaderView($url);
     $curtain = $this->buildCurtain($url);
@@ -39,20 +40,7 @@
       ->setErrors(array(pht('This URL is invalid due to a bad protocol.')))
       ->setIsHidden($url->isValid());
 
-    $is_serious = PhabricatorEnv::getEnvConfig('phabricator.serious-business');
-    $add_comment_header = $is_serious
-      ? pht('Add Comment')
-      : pht('More Cowbell');
-    $draft = PhabricatorDraft::newFromUserAndKey($viewer, $url->getPHID());
-    $comment_uri = $this->getApplicationURI(
-      '/url/comment/'.$url->getID().'/');
-    $add_comment_form = id(new PhabricatorApplicationTransactionCommentView())
-      ->setUser($viewer)
-      ->setObjectPHID($url->getPHID())
-      ->setDraft($draft)
-      ->setHeaderText($add_comment_header)
-      ->setAction($comment_uri)
-      ->setSubmitButtonName(pht('Add Comment'));
+    $add_comment_form = $this->buildCommentForm($url, $timeline);
 
     $view = id(new PHUITwoColumnView())
       ->setHeader($header)
@@ -72,7 +60,16 @@
         array(
           $view,
       ));
+  }
+
+  private function buildCommentForm(PhabricatorPhurlURL $url, $timeline) {
+    $viewer = $this->getViewer();
+    $box = id(new PhabricatorPhurlURLEditEngine())
+      ->setViewer($viewer)
+      ->buildEditEngineCommentView($url)
+      ->setTransactionTimeline($timeline);
 
+    return $box;
   }
 
   private function buildHeaderView(PhabricatorPhurlURL $url) {