but there's something charming about the ascii art over slack in this project that would miss
It's not very hard, you can take inspiration from my project "localslackirc", it even has a tool to extract the slack token from firefox's cookies (if you copy paste code, keep in mind it's GPL licensed).
(If you're not a beginner it's probably fine to just use "algebraic" notation anyway.)
I realize this sounds exactly like "I can tell from some of the pixels and from seeing quite a few shops in my time" but I really can tell.
Edit: Also you can see this was made with https://github.com/features/spark, but that's cheating, it's more fun to make accusations based on vague feelings about the writing tone.