The tags Quarto leaves out
This deck is rendered by the documentation site so the tags can be read out of it.
View the page source, or fetch it, and the <head> carries the Open Graph and Twitter card tags built from the front matter above.
The front matter uses the standard Quarto keys: title, description, site-url, image, open-graph, and twitter-card.
Nothing under extensions.social is set here, which is the usual case.
Quarto writes sixteen social tags for this deck by itself.
The filter writes nineteen: five Quarto leaves out, og:url and og:type among them, and the fourteen Quarto has already written.