On this site, Tags are octothorpes

The easiest way to octothorpe a page is to turn that page’s existing metadata into octothorpes. That’s what’s happening here – this site is built so that any tag added to a page turns into an octothorpe for the same term. The card in the left margin outputs all the tags on this page as octothorpes. So, as an author, I don’t have to take any extra steps. I just tag my page, and it will become an octothorpe.

For comparision, here’s a page that just uses tags without octothorping them.

You can even use your existing markup without adding anything extra if you make a custom harmonizer.