Ticket #51861: patch.diff

wp-admin/includes/theme.php

@@ -76 +76 @@
         $theme_dir  = trailingslashit( $themes_dir . $stylesheet );
         $deleted    = $wp_filesystem->delete( $theme_dir, true );
 
+        /**
+         * Fires immediately after a theme deletion attempt.
+         *
+         * @since 5.6.0
+         *
+         * @param string $stylesheet  Stylesheet of the theme to delete.
+         * @param bool   $deleted     Whether the theme deletion was successful.
+         */
+        do_action( 'deleted_theme', $stylesheet, $deleted );
+        
         if ( ! $deleted ) {
                 return new WP_Error(
                         'could_not_remove_theme',