I like that you keep things verifiable at each step too, thats the part most AI coding tools skip and then people think theyre progressing when theyre just generating code.

how do you decide milestone size so its not too tiny but also not overwhelming? do you track failed attempts/retries as part of progress, or only completed milestones? Also are you planning a mode where users can switch between learning path and spec mode in the same project? I think that could be very strong.