name : ComposerPackage.php <?php namespace Statamic\Rules; use Closure; use Illuminate\Contracts\Validation\ValidationRule; class ComposerPackage implements ValidationRule { public function validate(string $attribute, mixed $value, Closure $fail): void { if (! preg_match("/^[^\/\s]+\/[^\/\s]+$/", $value)) { $fail('statamic::validation.composer_package')->translate(); } } }