// config/app.php
'providers' => [
    ...
    Spatie\LinkChecker\LinkCheckerServiceProvider::class,
];

return [

    /*
     * The base url of your app. Leave this empty to use
     * the url configured in config/app.php
     */
    'url' => '',

    /*
     * The profile determines which links need to be checked.
     */
    'default_profile' => Spatie\LinkChecker\CheckAllLinks::class,

    /*
     * The reporter determines what needs to be done when the
     * the crawler has visited a link.
     */
    'default_reporter' => Spatie\LinkChecker\Reporters\LogBrokenLinks::class,
    
    /*
     * To speed up the checking process we'll fire off requests concurrently.
     * Here you can change the amount of concurrent requests.
     */
    'concurrency' => 10

    /*
     *  Here you can specify configuration regarding the used reporters
     */
    'reporters' => [

        'mail' => [

            /*
             * The `from` address to be used by the mail reporter.
             */
            'from_address' => '',
            
            /*
             * The `to` address to be used by the mail reporter.
             */
            'to_address' => '',

            /*
             * The subject line to be used by the mail reporter.
             */
            'subject' => '',
        ],

        /*
         * If you wish to exclude status codes from the reporters,
         * you can select the status codes that you wish to
         * exclude in the array below like: [200, 302]
         */
        'exclude_status_codes' => [],
    ],
];

// app/console/Kernel.php

protected function schedule(Schedule $schedule)
{
    ...
    $schedule->command('link-checker:run')->sundays()->daily();
}

abstract class CrawlProfile
{
    /**
     * Determine if the given url should be crawled.
     *
     * @param \Psr\Http\Message\UriInterface $url
     *
     * @return bool
     */
    abstract public function shouldCrawl(UriInterface $url): bool;
}

abstract class CrawlObserver
{
    /**
     * Called when the crawler will crawl the url.
     *
     * @param \Psr\Http\Message\UriInterface $url
     */
    public function willCrawl(UriInterface $url)
    {
    }

    /**
     * Called when the crawler has crawled the given url successfully.
     *
     * @param \Psr\Http\Message\UriInterface $url
     * @param \Psr\Http\Message\ResponseInterface $response
     * @param \Psr\Http\Message\UriInterface|null $foundOnUrl
     */
    abstract public function crawled(
        UriInterface $url,
        ResponseInterface $response,
        ?UriInterface $foundOnUrl = null
    );

    /**
     * Called when the crawler had a problem crawling the given url.
     *
     * @param \Psr\Http\Message\UriInterface $url
     * @param \GuzzleHttp\Exception\RequestException $requestException
     * @param \Psr\Http\Message\UriInterface|null $foundOnUrl
     */
    abstract public function crawlFailed(
        UriInterface $url,
        RequestException $requestException,
        ?UriInterface $foundOnUrl = null
    );

    /**
     * Called when the crawl has ended.
     */
    public function finishedCrawling()
    {
    }
}