The @Archives agent exports as Archives.html. Code in the template bstMainPage uses export code to export a list of its children.

The export code from bstMainPage:

^if($Name=="BlogArchives")^
<!-- Name==BlogArchives -->
	<h1 class="post-title">^value(Name)^</h1>
	<br>
	<div^if($blogBkgOpt.contains("CARD"))^ class="article-card"^endIf^>
	<section class="main-toc">
	<ul>
		^children(bstPostPlusWC_li)^
	</ul>
	</section> 
	</div>
^endIf^