muninn/app/Providers/AppServiceProvider.php

<?php

namespace App\Providers;

use App\Support\Publishing\PublisherManager;
use App\Support\Publishing\RedditPublisher;
use App\Support\Publishing\WordPressPublisher;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     */
    public function register(): void
    {
        $this->app->singleton(PublisherManager::class, fn ($app) => new PublisherManager([
            $app->make(WordPressPublisher::class),
            $app->make(RedditPublisher::class),
        ]));
    }

    /**
     * Bootstrap any application services.
     */
    public function boot(): void
    {
        //
    }
}