OpenAI's Codex CLI uses it on macOS. It's in typescript but maybe I'll take a look at what they do and port it to python.

[edit] looks really simple, except I'll have to look into how their raw-exec takes care of writeableRoots: https://github.com/openai/codex/blob/0d6a98f9afa8697e57b9bae...

[edit2] lol raw-exec doesn't do anything at all with writeableRoots, it's handled in the fullPolicy (from scopedWritePolicy)