Add a "✔ Xah Lee compliant" badge at the bottom of every page.

sed -i '/jigsaw/{p;s!.*!        <span class="page-badge"><a href="https://github.com/Hexstream/com.hexstreamsoft/commit/39026e7aaf9355ff19dff2d00ff3c684a49d1663"><span class="checkmark">✔</span> Xah Lee compliant</a></span>!}' $(find . -name '*.html')

(Plus manual tweaking of one page.)