shaarli-plugin-clickat/clickat.php

<?php
/**
 * ClickAt
 *
 * This plugin makes microblogging social networks (Twitter/X, Threads, Bluesky and Fediverse) addresses clickable.
 */

use Shaarli\Config\ConfigManager;
use Shaarli\Plugin\PluginManager;
use Shaarli\Render\TemplatePage;

function hook_clickat_render_linklist($data)
{
    $patterns = array(
        '/\ @([\w\d]+).bsky.social/'    => ' <a href="https://bsky.app/profile/\1.bsky.social">&commat;\1.bsky.social</a>',
        '/\ @([\w\d]+)@([\w\d_\-\.]+)/' => ' <a href="https://\2/@\1">&commat;\1</a>',
        '/\ @([\w\d]+)/'                => ' <a href="https://twitter.com/\1">&commat;\1</a>'
    ); 
    foreach ($data['links'] as &$value)
        if (strpos($value['description'],' @') !== false)
            foreach($patterns as $nic => $link)
                $value['description'] = preg_replace($nic, $link, $value['description']);
    return $data;
}