JavaScript libraries have fabulous opportunities to include demos in their documentation. Here's a machine learning library that has a demo of agents exploring the home page! https://caza.la/synaptic/#/
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Exploring design ideas using AI as a learning assistant, for creative exploration: https://andymatuschak.org/hmwl/
TIL Tcl has a notion of 'safe interpreters', a mode where you can run untrusted code in a sandbox: https://www.tcl.tk/man/tcl8.4/TclCmd/safe.htm
Not many programming languages have this, but it's way safer to include in the implementation than try to build as a userland library.
I'm still tinkering with the website for my PL experiment. I want the styling to express "labour of love hobby project".
Choosing what program to show on the home page is really hard too. All the keywords are links like Racket.
What do you think? https://www.garden-lang.org/