looks like this https://github.com/rfonseca/xkcd-gnuplot
Thanks, and, yes, I don't write with LLMs, as seen above.
I would rather see some awkward phrasing than bland LLM slop!
Also, many plotting libraries include an xkcd style these days:
https://matplotlib.org/stable/api/_as_gen/matplotlib.pyplot....
And libraries for various languages:
https://github.com/timqian/chart.xkcd
So if you have a preferred dev environment there's probably a way to set it to xkcd style.