Probably too messy to understand what's exactly happening -- but my main takeaway is that if you implement your own DSL (for Graphviz at least), implement in su

Probably too messy to understand what's exactly happening -- but my main takeaway is that if you implement your own DSL (for Graphviz at least), implement in such a way that you can freely mix DSL and raw bits. That way it's very easy to experiment or tweak minor bits without rewriting half of the code.