I approve of this macro name: https://github.com/immutant/immutant/blob/master/web/src/immutant/web.clj#L143

There is a "online repl" with a graph library like ubergraph ? I want to draw a vizgraph with clojure.

its always been weird to me that there aren't multiple implementations of stuff like graphviz

like, that they aren't prolific

It is a non-trivial amount of work to create high quality graph drawing algorithms, so if the dominant one has that many bells and whistles already, why implement another that does a lot less?

so many libraries that provide that in language X are like "oh make sure to have this command line tool installed"

But I suppose that comment could be applied for X-Y plot charting libraries, too, which seem legion.

I don't know of an online REPL with graphviz built in, but it is pretty trivial to install graphviz on macOS with Homebrew or MacPorts, or on Ubuntu and probably many flavors of Linux