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
@@ -11,10 +11,12 @@
   'class' => array(
     'SecureShieldsUpAction' => 'abuse/SecureShieldsUpAction.php',
     'SecureShieldsUpTestCase' => 'abuse/__tests__/SecureSheldsUpTestCase.php',
+    'SecureSupportRemarkupRule' => 'support/SecureSupportRemarkupRule.php',
   ),
   'function' => array(),
   'xmap' => array(
     'SecureShieldsUpAction' => 'HeraldAction',
     'SecureShieldsUpTestCase' => 'PhabricatorTestCase',
+    'SecureSupportRemarkupRule' => 'PhabricatorRemarkupCustomInlineRule',
   ),
 ));
diff --git a/src/support/SecureSupportRemarkupRule.php b/src/support/SecureSupportRemarkupRule.php
new file mode 100644
--- /dev/null
+++ b/src/support/SecureSupportRemarkupRule.php
@@ -0,0 +1,44 @@
+<?php
+
+final class SecureSupportRemarkupRule
+  extends PhabricatorRemarkupCustomInlineRule {
+
+  public function apply($text) {
+    return preg_replace_callback(
+      '((?<![#@-])\bPHI([1-9]\d*)(?:#([-\w\d]+))?(?!\w))u',
+      array($this, 'markupSupportIssue'),
+      $text);
+  }
+
+  public function markupSupportIssue($matches) {
+    if (!$this->isFlatText($matches[0])) {
+      return $matches[0];
+    }
+
+    $engine = $this->getEngine();
+    if ($engine->isTextMode()) {
+      return $matches[0];
+    }
+
+    $id = $matches[1];
+    $anchor = idx($matches, 2);
+
+    $monogram = "PHI{$id}";
+    $uri = "https://admin.phacility.com/{$monogram}";
+    if ($anchor) {
+      $uri = new PhutilURI($uri);
+      $uri->setAnchor($anchor);
+      $uri = (string)$uri;
+    }
+
+    $tag = id(new PHUITagView())
+      ->setName($monogram)
+      ->setHref($uri)
+      ->setType(PHUITagView::TYPE_SHADE)
+      ->setColor(PHUITagView::COLOR_VIOLET)
+      ->render();
+
+    return $engine->storeText($tag);
+  }
+
+}