Support for reverse execution

[amyjko]

We've observed many developers want to "reset" the strategy, starting over from scratch, or winding back to a particular place in the strategy after going down a path that wasn't fruitful, or trying a strategy that isn't encoded in the explicit strategy we provided. Because we don't support this, developers often abandon the systematic strategy altogether, rather than reusing their progress.

I'm torn on whether this is MVP or nice to have. My sense is that if we don't implement this, the tool won't feel complete and developers won't want to use it.