> only while he himself is being supervised

No, this is impossible unless Bob is presenting at each weekly meeting simply the output of the LLM and feeding the tutor's feedback straight into it. For a total of 10 minutes work per week, and the tutor would notice straight away at least for the lack of progress.

No, the article specifies that Bob actually works with the LLM, doesn't just delegate. He asks the agent to summarise, to explain, and to help with bug fixing. You could easily argue that Bob, having such an AI tutor available 24/7, can develop understanding much faster. He certainly won't waste his time with small details of python syntax (though working with a "coding expert" will make his code much cleaner and more advanced).