a> directory,</p></li>
<li><p>add your created system in <em>extensions.json</em> file and</p></li>
<li><p>build System Designer:</p>
<p>shell
npm run build`</p></li>
</ul>
<p>Your system will be then shown in the list of extensions.</p>
<blockquote>
<p>You can <a href="create-an-extension.html">create extensions inside System Designer</a>.</p>
</blockquote>
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