> {{brace-enclosed shortcodes}}

I haven’t checked if any of the details have changed any time recently, but Zola does this, and I had a rough time with it because of the interactions with Markdown rules around raw HTML and escaping and such. I have worked to forget the details. I reckon Zola bakes Markdown in too deeply, and it’s a pain. Especially because of indentation causing code blocks, that’s one of the biggest problems with extending Markdown by “just writing HTML”.