I loveee hammerspoon. And had a subscription to OpenIn a bit back. Advanced scripting isn’t going to happen, even paging out to another script. Recently committed to Regex which would cover most of that. I’ll look into how it “fixes” old associations.
Walking back my regex commitment, just a heads-up/apology if you had your hopes up. Want this to stay as a CLI and not a dynamic app. Let me know if there's anything else you could see useful that would fit within that scope!