Starting with the grammar vs starting with the backend: fight! Personally, I'm on Team Backend; if you have something that works, it's a lot easier to glue thin

Starting with the grammar vs starting with the backend: fight! Personally, I'm on Team Backend; if you have something that works, it's a lot easier to glue things in front of it that maintain the property of it working, because you can just run the product. Testing a parser in isolation is a lot more annoying.