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
@@ -2643,6 +2643,8 @@
     'PhabricatorPhurlApplication' => 'applications/phurl/application/PhabricatorPhurlApplication.php',
     'PhabricatorPhurlController' => 'applications/phurl/controller/PhabricatorPhurlController.php',
     'PhabricatorPhurlDAO' => 'applications/phurl/storage/PhabricatorPhurlDAO.php',
+    'PhabricatorPhurlLinkRemarkupRule' => 'applications/phurl/remarkup/PhabricatorPhurlLinkRemarkupRule.php',
+    'PhabricatorPhurlRemarkupRule' => 'applications/phurl/remarkup/PhabricatorPhurlRemarkupRule.php',
     'PhabricatorPhurlSchemaSpec' => 'applications/phurl/storage/PhabricatorPhurlSchemaSpec.php',
     'PhabricatorPhurlURL' => 'applications/phurl/storage/PhabricatorPhurlURL.php',
     'PhabricatorPhurlURLAccessController' => 'applications/phurl/controller/PhabricatorPhurlURLAccessController.php',
@@ -6770,6 +6772,8 @@
     'PhabricatorPhurlApplication' => 'PhabricatorApplication',
     'PhabricatorPhurlController' => 'PhabricatorController',
     'PhabricatorPhurlDAO' => 'PhabricatorLiskDAO',
+    'PhabricatorPhurlLinkRemarkupRule' => 'PhutilRemarkupRule',
+    'PhabricatorPhurlRemarkupRule' => 'PhabricatorObjectRemarkupRule',
     'PhabricatorPhurlSchemaSpec' => 'PhabricatorConfigSchemaSpec',
     'PhabricatorPhurlURL' => array(
       'PhabricatorPhurlDAO',
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
@@ -26,6 +26,13 @@
     return true;
   }
 
+  public function getRemarkupRules() {
+    return array(
+      new PhabricatorPhurlRemarkupRule(),
+      new PhabricatorPhurlLinkRemarkupRule(),
+    );
+  }
+
   public function getRoutes() {
     return array(
       '/U(?P<id>[1-9]\d*)' => 'PhabricatorPhurlURLViewController',
diff --git a/src/applications/phurl/remarkup/PhabricatorPhurlLinkRemarkupRule.php b/src/applications/phurl/remarkup/PhabricatorPhurlLinkRemarkupRule.php
new file mode 100644
--- /dev/null
+++ b/src/applications/phurl/remarkup/PhabricatorPhurlLinkRemarkupRule.php
@@ -0,0 +1,63 @@
+<?php
+
+final class PhabricatorPhurlLinkRemarkupRule extends PhutilRemarkupRule {
+
+  public function getPriority() {
+    return 200.0;
+  }
+
+  public function apply($text) {
+    // `((U123))` remarkup link to `/u/123`
+    // `((alias))` remarkup link to `/u/alias`
+    return preg_replace_callback(
+      '/\(\(([^ )]+)\)\)/',
+      array($this, 'markupLink'),
+      $text);
+  }
+
+  public function markupLink(array $matches) {
+    $engine = $this->getEngine();
+    $viewer = $engine->getConfig('viewer');
+    $text_mode = $engine->isTextMode();
+
+    if (!$this->isFlatText($matches[0])) {
+      return $matches[0];
+    }
+
+    $ref = $matches[1];
+
+    if (ctype_digit($ref)) {
+      $phurls = id(new PhabricatorPhurlURLQuery())
+        ->setViewer($viewer)
+        ->withIDs(array($ref))
+        ->execute();
+    } else {
+      $phurls = id(new PhabricatorPhurlURLQuery())
+        ->setViewer($viewer)
+        ->withAliases(array($ref))
+        ->execute();
+    }
+
+    $phurl = head($phurls);
+
+    if ($phurl) {
+      if ($text_mode) {
+        return $phurl->getName().' <'.$phurl->getLongURL().'>';
+      }
+
+      $link = phutil_tag(
+        'a',
+        array(
+          'href' => $phurl->getLongURL(),
+          'target' => '_blank',
+        ),
+        $phurl->getName());
+
+      return $this->getEngine()->storeText($link);
+    } else {
+      return $matches[0];
+    }
+  }
+
+
+}
diff --git a/src/applications/phurl/remarkup/PhabricatorPhurlRemarkupRule.php b/src/applications/phurl/remarkup/PhabricatorPhurlRemarkupRule.php
new file mode 100644
--- /dev/null
+++ b/src/applications/phurl/remarkup/PhabricatorPhurlRemarkupRule.php
@@ -0,0 +1,19 @@
+<?php
+
+final class PhabricatorPhurlRemarkupRule
+  extends PhabricatorObjectRemarkupRule {
+
+  protected function getObjectNamePrefix() {
+    return 'U';
+  }
+
+  protected function loadObjects(array $ids) {
+    $viewer = $this->getEngine()->getConfig('viewer');
+
+    return id(new PhabricatorPhurlURLQuery())
+      ->setViewer($viewer)
+      ->withIDs($ids)
+      ->execute();
+  }
+
+}