I have not played with this problem, so I don't know what is out there. However given the kinds of problems that you want to solve, I would suggest taking a close look at POE and its documentation.

Not because it solves the problem you want (it doesn't), but because the entire "state machine" philosophy it uses is (at a guess) going to be a good fit for your problem and is similar to the direction you are heading. Therefore seeing a mature implementation of those ideas in another context is likely to shorten the path between you and some key design ideas you will find helpful.

Remember that the most interesting innovations tend to happen when someone finds a way of taking person A's well-developed theories and apply them to person B's problem...

In reply to Re (tilly) 1: Refining the CGI process through structure and templates by tilly
in thread Refining the CGI process through structure and templates by boo_radley

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