Reverse engineering iOS Shortcuts deeplinks

I am a big fan of my phone being in grayscale, which reduces screentime and cuts into into how attention-grabbing the bright red app badges are. The problem is that I don't want all apps to be in grayscale: some because they're effectively broken (Photos, Camera) and others because I'm okay spending time on them (Books, Chess, Crosswords). I used to selectively do this with a Cydia tweak I wrote…