The problem isn't a lack of grammar, the problem is not having a grammar factored out of one specific codebase which implements the grammar, such that you can't

The problem isn't a lack of grammar, the problem is not having a grammar factored out of one specific codebase which implements the grammar, such that you can't be sure the existing code is doing the right thing except from the trivial standpoint of "this code is defined to be correct" which doesn't provide much of a basis for discussion.