> Everyone is looking down on LLM-assisted dev here, but I think it's a great fit.

From my own experience, I don't think that's the case. I've wrote a similar sync-script obsidian<->notion-databases myself some months ago, and I also used AI in the beginning; but I learned really fast what an annoying mess Notions API is, and how fast LLMs are hanging up on edge-cases. AI is good to get a start into the API, but at the end you still have to fix it up yourself.