Awesome, I've been doing the same thing for the past 15 years. It's one of the most stimulating activities I've found within software.

I recently sat down and put together the beginnings of a framework to play around with or use as a starting point.

https://github.com/codr7/shi

Also check out the small wonder currently not trending: https://news.ycombinator.com/item?id=45062168