I got an email from a communications professor about my project Tracery Live, an implementation of Kate Compton's Tracery that lets you link someone directly to a dynamically-flattened grammar (via a query parameter that's either a compressed version of the grammar or an external URL). It will generate a shortlink for your creation upon request. This is the same tech once used by Cheap Bots, Done Quick and still used by Cheap Bots, Toot Sweet.
In the process of answering some questions, I noticed that some things about it were broken, so I've updated it!
It now loads URLs properly again and has some more help text and other usability improvements. Here's an example of it running the Night Vale example grammar from the Tracery site! You can probably do some wild stuff with HTML in it. I haven't tested it with a chiframe, but I bet that'll work, too!
It's still running on an ancient version of Ember and requires Node 14 to deploy, but that's only relevant to folks who want to host their own instance.