Yeah my ideal is to have something that cleanly "pip installs" as a dependency such that users of my open source Python projects can self host tools that let them extend using arbitrary code, including code written by LLMs.
I've been picking at this problem for a few years now!
On the one hand I get why it's so hard. But it really feels like it should be possible to solve this in 2026 - executing arbitrary code in a way that constrains its memory and CPU time usage is a problem our industry solves in browsers and hosting platforms and databases and all sorts of other places, and has done for decades.
The whole LLM-assisted end-user programming thing makes solving this with the right developer affordances so valuable!