I built the current version of baritone using the command line guide, and got only 3 artifacts inside libs, one of which was baritone-1.2.11.jar not (baritone-api-1.2.11.jar as the guide mentions). I replaced the files in the MC libraries folder, and deleted the entire body of Impact's JSON to look like this:

I have the Forge version of Impact, and when I ran .b version, it said I was using a null version. None of the new commands, such as .b buildIgnoreExisting were working, and even if I completely delete the new .jar from the libraries directory, it behaves exactly the same.

TLDR: How exactly do I update Baritone for Impact 4.8.3?

Closing as this is an issue for impact rather than baritone.