Building harnesses does seem like a task that's particularly conductive to psychosis. I've wondered if it's because there is no push-back; almost anything you try will be "right" in that your changes appear to make things happen. "Oh look I added a carpenter and now it's walking around and making notes about the scaffolding" So you get to stay in your flow state without reassessing if the concepts you are forming are ultimately meaningful.

Although I think the post also self-diagnoses some factors that also help:

  With the Gas Town Mayor, you feel like you’re operating at a special level, a VIP, above all the workers. You are talking to someone important: the mayor of a factory the size of a town. You have access to someone with resources, someone who gets you, someone who appreciates how busy you are.

  Working with regular coding agents just doesn’t give you that special feeling.

I think at this point it’s all but confirmed that LLMs sycophantic tendencies coupled with yes-man attitudes produce AI psychosis and AI fanaticism. Especially if you’re already of high opinion of yourself (be it deserved or not).