Generates a consolidated list of all issue boxes referenced throughout the document.

<div class="issue" data-number="42">
  <p>We need to decide the algorithm.</p>
</div>

<!-- Later in the document: -->
<section id="issue-summary" class="appendix">
  <!-- All issue boxes are listed here automatically -->
</section>

• Collects all elements with class="issue" across the document
• Each entry includes the issue number (if data-number is set), the title (if title attribute is set), and a link back to the issue in the document
• Useful for tracking all open issues in a spec at a glance during review
• Typically placed as an informative appendix