@aengelberg definitely not sure if cfg/ebnf is the correct thing but it looks like it provides the necessary data. Not in the format that would be optimal but I think I can kinda do some kind of functionality based on it. For now, I’m mostly happy if I can find the string literals which can go in and I can ignore regexp literals and other more complex stuff. So, basically I do this recursive algorithm which retrieves elements from the combinatioral tree until it finds :string

best I can come up with as it is now