Comment by DrSiemer

My own tool has a Project Starter, that takes users from idea to todo list in a number of very specific phases. I've been using it for small to medium sized projects for a year now and it still works great for me.

Just don't expect to end up with a finished project; it's more like a first draft. Once it's there, it's much easier to determine what it is you actually want, since you can directly experience what works and what should be changed.

One important caveat is that I do not work with agents; each step goes through a fairly rigid manual review phase.