Having too much fun with obb, thank you.
I need to get either an env variable into my script, or read it from a file. Is https://github.com/JXA-Cookbook/JXA-Cookbook/wiki/Shell-and-CLI-Interactions#accessing-the-environment my only option? slurp (obviously in hindsight, is not available)
There is a slurp version available in the code of nbb, you could probably just copy that one