I use https://sketch.dev, which seems to be approximately the same kind of thing. I find it is very organized, it does not need nearly as much babysitting as this guy is talking about. Perhaps a difference is the "todo read" and "todo write" tools, which it uses to break the main goal into achievable tasks, and then judge itself on if it has finished correctly or not. Also, Sketch is easy-going with corrections: if you tell it that it went the wrong direction, it quickly adjusts and follows your direction.

Anyway, two big thumbs up for agentic dev workflows from me, but only so far with Sketch.