Without the framework

The PHP half depends on Symfony components only, not on symfony/framework-bundle: it works in projects that wire an event dispatcher by hand. Skip SilarhiTurboBundle and instantiate the classes:

use Silarhi\TurboBundle\EventListener\TurboFrameListener;
use Silarhi\TurboBundle\TurboManager;
use Silarhi\TurboBundle\Twig\TurboExtension;

$turboManager = new TurboManager($requestStack);
$dispatcher->addSubscriber(new TurboFrameListener($turboManager));

// Optional: the turbo_frame Twig filter (requires twig/twig).
// The second argument is the base template the filter falls back to (default: 'base-frame.html.twig').
$twig->addExtension(new TurboExtension($turboManager, 'base-frame.html.twig'));

TurboFrameListener also follows DELETE redirects on Turbo requests by default; pass new TurboFrameListener($turboManager, followDeleteRedirects: false) to disable that.

Requirements

• $requestStack must be the RequestStack your HttpKernel pushes requests on: TurboManager reads the headers of its current request, and answers as for a plain, non-Turbo request when there is none.
• $dispatcher must be the event dispatcher of that HttpKernel: the listener subscribes to kernel.response.
• Outside a request (a console command, a message handler, an email), the turbo_frame filter returns the template unchanged.

See the PHP API reference for every public method.