Varnish

<?php
// app/code/Vendor/Ops/Console/Command/PurgeTagsCommand.php
declare(strict_types=1);

namespace Vendor\Ops\Console\Command;

use Magento\CacheInvalidate\Model\PurgeCache;
use Magento\Framework\Console\Cli;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class PurgeTagsCommand extends Command
{
    public function __construct(
        private readonly PurgeCache $purgeCache,
        ?string $name = null
    ) {
        parent::__construct($name);
    }

    protected function configure(): void
    {
        $this->setName('vendor:varnish:purge');
        $this->setDescription('Sends a PURGE request to the configured Varnish hosts');
        $this->addArgument(
            'tags',
            InputArgument::IS_ARRAY | InputArgument::REQUIRED,
            'Cache tags, for example cat_p_42'
        );
        parent::configure();
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $tags = $input->getArgument('tags');
        $purged = $this->purgeCache->sendPurgeRequest($tags);
        $output->writeln($purged ? 'Purged: ' . implode('|', $tags) : 'Purge failed');

        return $purged ? Cli::RETURN_SUCCESS : Cli::RETURN_FAILURE;
    }
}

// $ bin/magento vendor:varnish:purge cat_p_42 cat_c_3
// Purged: cat_p_42|cat_c_3