A repository for PHP 8 Attributes that you can use with Psalm.
The potential for PHP 8's runtime attribute reflection somewhere in your codebase makes this complicated.
If the following code exists your codebase:
function getClassAttributes(string $className) {
foreach ((new ReflectionClass($className))->getAttributes() as $attr) {
$attr->newInstance();
}
}
And there’s a possibility it might load classes with these particular attributes then install with
composer require psalm/attributes:*
If you’re not planning to use any runtime attribute reflection (and nobody might use it on your library/package classes) then it should be safe to install with
composer require --dev psalm/attributes