It seems to me the more killer product here is the "Writing two files to build a webapp", and you could comfortably rip out ChatGPT and market to a wider audience?
I'm curious about what audience you have in mind and what kind of apps would you be interested in building this way? Would love to hear more of your thoughts!
Edit: I should add that our main motivation for integrating GPT is that we had to introduce some new concepts to make this experience work, which increased the app-building learning curve. We thought having GPT generate code and highlighting diffs would be a neat way to teach users how to develop apps without reading a lot of documentation.