[Bug]: tags within api definition are not unique

[maglnet]

Version

v4.26.2

Description

Hi,

when having the same tag for multiple methods / routes the resulting api definition has the same tag multiple times but the specification says that tag names must be unique.

Within the specification for the tags within the OpenAPI object, the OpenAPI specification says:

Each tag name in the list MUST be unique.

Perhaps I'm doing something wrong?

Example class:

use OpenApi\Attributes as OA;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\JsonResponse;

class ExampleController extends AbstractController
{

    /**
     * example method foo
     *
     * @return JsonResponse
     */
    #[Route('/foo')]
    #[OA\Tag('Example')]
    public function exampleFoo(): Response
    {
        new JsonResponse(['foo']);
    }

    /**
     * example method bar
     *
     * @return JsonResponse
     */
    #[Route('/bar')]
    #[OA\Tag('Example')]
    public function exampleBar(): Response
    {
        new JsonResponse(['bar']);
    }
}

this results in a tag list like this:

{
    "tags": [
        {
            "name": "Example",
            "description": "Example"
        },
        {
            "name": "Example",
            "description": "Example"
        }
    ]
}

but imho it should result in a tags list like this:

{
    "tags": [
        {
            "name": "Example",
            "description": "Example"
        }
    ]
}

Best regards,
Matthias

Additional context

No response

[DjordyKoert]

This looks like an issue for https://github.com/zircote/swagger-php