diff --git a/src/wp-admin/includes/class-automatic-upgrader-skin.php b/src/wp-admin/includes/class-automatic-upgrader-skin.php
index a6f32783d3..439fe597f1 100644
--- a/src/wp-admin/includes/class-automatic-upgrader-skin.php
+++ b/src/wp-admin/includes/class-automatic-upgrader-skin.php
@@ -1,10 +1,10 @@
 <?php
 /**
- * The User Interface "Skins" for the WordPress File Upgrader
+ * Upgrader API: Automatic_Upgrader_Skin class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
@@ -13,8 +13,6 @@
  * This skin is designed to be used when no output is intended, all output
  * is captured and stored for the caller to process and log/email/discard.
  *
- * @package WordPress
- * @subpackage Upgrader
  * @since 3.7.0
  */
 class Automatic_Upgrader_Skin extends WP_Upgrader_Skin {
diff --git a/src/wp-admin/includes/class-bulk-plugin-upgrader-skin.php b/src/wp-admin/includes/class-bulk-plugin-upgrader-skin.php
index d23b46b2f6..498b55d535 100644
--- a/src/wp-admin/includes/class-bulk-plugin-upgrader-skin.php
+++ b/src/wp-admin/includes/class-bulk-plugin-upgrader-skin.php
@@ -1,12 +1,17 @@
 <?php
 /**
- * The User Interface "Skins" for the WordPress File Upgrader
+ * Upgrader API: Bulk_Plugin_Upgrader_Skin class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
+/**
+ * Bulk Plugin Upgrader Skin for WordPress Plugin Upgrades.
+ *
+ * @since 3.0.0
+ */
 class Bulk_Plugin_Upgrader_Skin extends Bulk_Upgrader_Skin {
 	public $plugin_info = array(); // Plugin_Upgrader::bulk() will fill this in.
 
diff --git a/src/wp-admin/includes/class-bulk-theme-upgrader-skin.php b/src/wp-admin/includes/class-bulk-theme-upgrader-skin.php
index b1a72bb014..645482fc9a 100644
--- a/src/wp-admin/includes/class-bulk-theme-upgrader-skin.php
+++ b/src/wp-admin/includes/class-bulk-theme-upgrader-skin.php
@@ -1,12 +1,17 @@
 <?php
 /**
- * The User Interface "Skins" for the WordPress File Upgrader
+ * Upgrader API: Bulk_Plugin_Upgrader_Skin class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
+/**
+ * Bulk Theme Upgrader Skin for WordPress Theme Upgrades.
+ *
+ * @since 3.0.0
+ */
 class Bulk_Theme_Upgrader_Skin extends Bulk_Upgrader_Skin {
 	public $theme_info = array(); // Theme_Upgrader::bulk() will fill this in.
 
diff --git a/src/wp-admin/includes/class-bulk-upgrader-skin.php b/src/wp-admin/includes/class-bulk-upgrader-skin.php
index cf3da1cd30..4b1de92d79 100644
--- a/src/wp-admin/includes/class-bulk-upgrader-skin.php
+++ b/src/wp-admin/includes/class-bulk-upgrader-skin.php
@@ -1,17 +1,15 @@
 <?php
 /**
- * The User Interface "Skins" for the WordPress File Upgrader
+ * Upgrader API: Bulk_Upgrader_Skin class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
- * Plugin Upgrader Skin for WordPress Plugin Upgrades.
+ * Generic Bulk Upgrader Skin for WordPress Upgrades.
  *
- * @package WordPress
- * @subpackage Upgrader
  * @since 3.0.0
  */
 class Bulk_Upgrader_Skin extends WP_Upgrader_Skin {
diff --git a/src/wp-admin/includes/class-language-pack-upgrader-skin.php b/src/wp-admin/includes/class-language-pack-upgrader-skin.php
index 4696563546..827d93f338 100644
--- a/src/wp-admin/includes/class-language-pack-upgrader-skin.php
+++ b/src/wp-admin/includes/class-language-pack-upgrader-skin.php
@@ -1,17 +1,15 @@
 <?php
 /**
- * The User Interface "Skins" for the WordPress File Upgrader
+ * Upgrader API: Language_Pack_Upgrader_Skin class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
  * Translation Upgrader Skin for WordPress Translation Upgrades.
  *
- * @package WordPress
- * @subpackage Upgrader
  * @since 3.7.0
  */
 class Language_Pack_Upgrader_Skin extends WP_Upgrader_Skin {
diff --git a/src/wp-admin/includes/class-plugin-installer-skin.php b/src/wp-admin/includes/class-plugin-installer-skin.php
index 97e049fbc3..1579927cd9 100644
--- a/src/wp-admin/includes/class-plugin-installer-skin.php
+++ b/src/wp-admin/includes/class-plugin-installer-skin.php
@@ -1,17 +1,15 @@
 <?php
 /**
- * The User Interface "Skins" for the WordPress File Upgrader
+ * Upgrader API: Plugin_Installer_Skin class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
  * Plugin Installer Skin for WordPress Plugin Installer.
  *
- * @package WordPress
- * @subpackage Upgrader
  * @since 2.8.0
  */
 class Plugin_Installer_Skin extends WP_Upgrader_Skin {
diff --git a/src/wp-admin/includes/class-plugin-upgrader-skin.php b/src/wp-admin/includes/class-plugin-upgrader-skin.php
index 98557a0e81..6782fc531d 100644
--- a/src/wp-admin/includes/class-plugin-upgrader-skin.php
+++ b/src/wp-admin/includes/class-plugin-upgrader-skin.php
@@ -1,17 +1,15 @@
 <?php
 /**
- * The User Interface "Skins" for the WordPress File Upgrader
+ * Upgrader API: Plugin_Upgrader_Skin class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
  * Plugin Upgrader Skin for WordPress Plugin Upgrades.
  *
- * @package WordPress
- * @subpackage Upgrader
  * @since 2.8.0
  */
 class Plugin_Upgrader_Skin extends WP_Upgrader_Skin {
diff --git a/src/wp-admin/includes/class-theme-installer-skin.php b/src/wp-admin/includes/class-theme-installer-skin.php
index eed68d1077..0dca21bc3f 100644
--- a/src/wp-admin/includes/class-theme-installer-skin.php
+++ b/src/wp-admin/includes/class-theme-installer-skin.php
@@ -1,17 +1,15 @@
 <?php
 /**
- * The User Interface "Skins" for the WordPress File Upgrader
+ * Upgrader API: Theme_Installer_Skin class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
  * Theme Installer Skin for the WordPress Theme Installer.
  *
- * @package WordPress
- * @subpackage Upgrader
  * @since 2.8.0
  */
 class Theme_Installer_Skin extends WP_Upgrader_Skin {
diff --git a/src/wp-admin/includes/class-theme-upgrader-skin.php b/src/wp-admin/includes/class-theme-upgrader-skin.php
index 64555e90ed..70650d3cbe 100644
--- a/src/wp-admin/includes/class-theme-upgrader-skin.php
+++ b/src/wp-admin/includes/class-theme-upgrader-skin.php
@@ -1,17 +1,15 @@
 <?php
 /**
- * The User Interface "Skins" for the WordPress File Upgrader
+ * Upgrader API: Theme_Upgrader_Skin class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
  * Theme Upgrader Skin for WordPress Theme Upgrades.
  *
- * @package WordPress
- * @subpackage Upgrader
  * @since 2.8.0
  */
 class Theme_Upgrader_Skin extends WP_Upgrader_Skin {
diff --git a/src/wp-admin/includes/class-wp-upgrader-skin.php b/src/wp-admin/includes/class-wp-upgrader-skin.php
index cbe24a8487..f1e04c62b7 100644
--- a/src/wp-admin/includes/class-wp-upgrader-skin.php
+++ b/src/wp-admin/includes/class-wp-upgrader-skin.php
@@ -1,17 +1,15 @@
 <?php
 /**
- * The User Interface "Skins" for the WordPress File Upgrader
+ * Upgrader API: WP_Upgrader_Skin class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
  * Generic Skin for the WordPress Upgrader classes. This skin is designed to be extended for specific purposes.
  *
- * @package WordPress
- * @subpackage Upgrader
  * @since 2.8.0
  */
 class WP_Upgrader_Skin {