app/Config/Cookie.php

@@ -84,6 +84,8 @@ class Cookie extends BaseConfig
      * Defaults to `Lax` for compatibility with modern browsers. Setting `''`
      * (empty string) means default SameSite attribute set by browsers (`Lax`)
      * will be set on cookies. If set to `None`, `$secure` must also be set.
+     *
+     * @phpstan-var 'None'|'Lax'|'Strict'|''
      */
     public string $samesite = 'Lax';
 

app/Config/ForeignCharacters.php

@@ -6,6 +6,9 @@ namespace Config;
 
 use CodeIgniter\Config\ForeignCharacters as BaseForeignCharacters;
 
+/**
+ * @immutable
+ */
 class ForeignCharacters extends BaseForeignCharacters
 {
 }