I went from ";" to fully working C++ production grade code with good test coverage. To my estimation, 90% of the work was done in an agent prompt. It was a side project, now it will be my job. The process is like they described.

For the core parts you cannot let go of the reins. You have to keep steering it. You have to take short breaks and reload the code into the agent as it starts acting confused. But once you get the hang of it, things that would take you months of convincing yourself and picking yourself back up to continue becomes a day's work.

Once you have a decent amount of work done, you can have the agent read your code as documentation and use it to develop further.