diff --git a/src/StringCase.php b/src/StringCase.php
index d049732..437169c 100644
--- a/src/StringCase.php
+++ b/src/StringCase.php
@@ -10,6 +10,7 @@
 use function strtolower;
 use function ucwords;
 
+/** snake_case / camelCase conversion utility. Not used internally. */
 final class StringCase
 {
     /**