In the actual ICM documentation provided here, it references a CONTEXT.md file being used in the directories to describe what happens in the directory, process, what files and what good looks like.
I've also seen some videos where folks are using AGENTS.md in their subfolders performing the same functions.
Does the name matter for any reason or is it the contents and the fact that it's referenced in the map that matters? Just making sure I'm not missing something here.