diff --git a/phpcs.xml.dist b/phpcs.xml.dist
new file mode 100644
index 0000000000..a8f9cf2587
--- /dev/null
+++ b/phpcs.xml.dist
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ruleset name="markie">
+  <description>PHP CodeSniffer configuration for the markie Drupal project.</description>
+
+  <!-- Scan custom modules and theme PHP files. -->
+  <file>web/modules/custom</file>
+  <file>web/themes/custom</file>
+
+  <!-- Exclude directories that contain third-party or generated code. -->
+  <exclude-pattern>*/node_modules/*</exclude-pattern>
+  <exclude-pattern>*/vendor/*</exclude-pattern>
+
+  <!-- Use Drupal and DrupalPractice coding standards. -->
+  <rule ref="Drupal"/>
+  <rule ref="DrupalPractice"/>
+
+  <!--
+    Exclude CSS sniffs that produce false positives with modern CSS features:
+    CSS custom properties, multi-line values, blank lines in :root,
+    and :where() pseudo-selector treated as multiple selectors.
+  -->
+  <rule ref="Squiz.CSS.MissingColon">
+    <exclude-pattern>*.css</exclude-pattern>
+  </rule>
+  <rule ref="Squiz.CSS.SemicolonSpacing">
+    <exclude-pattern>*.css</exclude-pattern>
+  </rule>
+  <rule ref="Squiz.CSS.Indentation.BlankLine">
+    <exclude-pattern>*.css</exclude-pattern>
+  </rule>
+  <rule ref="Squiz.CSS.Indentation.Incorrect">
+    <exclude-pattern>*.css</exclude-pattern>
+  </rule>
+  <rule ref="Drupal.CSS.ClassDefinitionNameSpacing.MultipleSelectors">
+    <exclude-pattern>*.css</exclude-pattern>
+  </rule>
+
+  <!--
+    Exclude the version key warning for custom (non-distributed) theme/module
+    info files. The version key is valid for site-specific custom code.
+  -->
+  <rule ref="Drupal.InfoFiles.AutoAddedKeys">
+    <exclude-pattern>web/themes/custom/*</exclude-pattern>
+    <exclude-pattern>web/modules/custom/*</exclude-pattern>
+  </rule>
+
+</ruleset>
diff --git a/web/modules/custom/markie/markie.install b/web/modules/custom/markie/markie.install
index 1568774b27..3980527766 100644
--- a/web/modules/custom/markie/markie.install
+++ b/web/modules/custom/markie/markie.install
@@ -1,6 +1,11 @@
 <?php
 
-use \Drupal\node\Entity\Node;
+/**
+ * @file
+ * Install, update and uninstall functions for the markie module.
+ */
+
+use Drupal\node\Entity\Node;
 
 /**
  * Implements hook_update_N().
@@ -14,7 +19,7 @@ function markie_update_10001() {
   // Load all the nodes.
   $nodes = Node::loadMultiple($nids);
   foreach ($nodes as $node) {
-    // Set the field_video_checked boolean to TRUE
+    // Set the field_video_checked boolean to TRUE.
     $node->set('field_video_checked', TRUE);
     $node->save();
     $node->set('field_video_checked', FALSE);
diff --git a/web/modules/custom/markie/markie.module b/web/modules/custom/markie/markie.module
index 79f72a551a..a67634b402 100644
--- a/web/modules/custom/markie/markie.module
+++ b/web/modules/custom/markie/markie.module
@@ -1,8 +1,15 @@
 <?php
 
 /**
-  * Implements hook_preprocess_HOOK().
-  */
+ * @file
+ * Hook implementations for the markie module.
+ */
+
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+
+/**
+ * Implements hook_preprocess_HOOK().
+ */
 function markie_preprocess_media(&$variables) {
   /** @var \\Drupal\\media\\Entity\\Media $media */
   $media = $variables['media'];
@@ -22,11 +29,10 @@ function markie_preprocess_user(&$variables) {
   // Just in case we ever add a sensitive field to user profiles, block
   // anonymous users from viewing user profiles in the default view mode, where
   // all fields are shown by default.
-
   // 1. Check if we are on the user profile page.
   // 2. Check if the current user is an anonymous user.
   // 3. If so, return 403.
   if (\Drupal::routeMatch()->getRouteName() === 'entity.user.canonical' && \Drupal::currentUser()->isAnonymous()) {
-    throw new \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException();
+    throw new AccessDeniedHttpException();
   }
 }
diff --git a/web/themes/custom/markconroy/README.md b/web/themes/custom/markconroy/README.md
index 488f4c5a4d..9056c4d7b0 100644
--- a/web/themes/custom/markconroy/README.md
+++ b/web/themes/custom/markconroy/README.md
@@ -1 +1 @@
-markconroy theme, generated from starterkit_theme. Additional information on generating themes can be found in the [Starterkit documentation](https://www.drupal.org/docs/core-modules-and-themes/core-themes/starterkit-theme).
\ No newline at end of file
+markconroy theme, generated from starterkit_theme. Additional information on generating themes can be found in the [Starterkit documentation](https://www.drupal.org/docs/core-modules-and-themes/core-themes/starterkit-theme).
diff --git a/web/themes/custom/markconroy/css/base/base.css b/web/themes/custom/markconroy/css/base/base.css
index 1b431a7d47..0ae494bfd3 100644
--- a/web/themes/custom/markconroy/css/base/base.css
+++ b/web/themes/custom/markconroy/css/base/base.css
@@ -118,4 +118,4 @@ blockquote {
 
 blockquote > * + * {
   margin-block-start: var(--spacing-small);
-}
\ No newline at end of file
+}
diff --git a/web/themes/custom/markconroy/css/components/global/breadcrumbs.css b/web/themes/custom/markconroy/css/components/global/breadcrumbs.css
index ad3c67d395..1a7d5cbb38 100644
--- a/web/themes/custom/markconroy/css/components/global/breadcrumbs.css
+++ b/web/themes/custom/markconroy/css/components/global/breadcrumbs.css
@@ -23,4 +23,4 @@
 .breadcrumb a {
   color: var(--color-primary);
   font-weight: normal;
-}
\ No newline at end of file
+}
diff --git a/web/themes/custom/markconroy/css/components/homepage.css b/web/themes/custom/markconroy/css/components/homepage.css
index c7318e8215..6d494c1ca1 100644
--- a/web/themes/custom/markconroy/css/components/homepage.css
+++ b/web/themes/custom/markconroy/css/components/homepage.css
@@ -30,5 +30,4 @@
   justify-content: center;
   align-items: center;
   flex-wrap: wrap;
-
 }
diff --git a/web/themes/custom/markconroy/css/components/pager.css b/web/themes/custom/markconroy/css/components/pager.css
index 87107b69c4..b998600170 100644
--- a/web/themes/custom/markconroy/css/components/pager.css
+++ b/web/themes/custom/markconroy/css/components/pager.css
@@ -1,4 +1,4 @@
 .pager__item.is-active a {
   color: var(--color-primary);
   text-decoration: none;
-}
\ No newline at end of file
+}
diff --git a/web/themes/custom/markconroy/markconroy.theme b/web/themes/custom/markconroy/markconroy.theme
index 96a4b5ea87..3a9d2af9fb 100644
--- a/web/themes/custom/markconroy/markconroy.theme
+++ b/web/themes/custom/markconroy/markconroy.theme
@@ -24,8 +24,8 @@ function markconroy_preprocess_image_widget(array &$variables) {
  * Implements hook_preprocess_HOOK() for page templates.
  */
 function markconroy_preprocess_page(array &$variables) {
-  // $variables['#attached']['library'][] = 'markconroy/course-signup-popup-form';
-  $variables['#attached']['library'][] = 'markconroy/mailing-list-signup-popup-form';
+  $variables['#attached']['library'][] =
+    'markconroy/mailing-list-signup-popup-form';
 }
 
 /**