How does this generally work? I've played with openai's API and I can send it questions and get answers. Is this app just parsing new additions to commits and passing in the whole code block as a prompt, with an additional line saying "please review this code"?

Additionally, how is this app able to handle so many potential requests to openai? Are they already paying for a bunch of tokens in anticipation? Or do you pay for how many tokens used per month? (The openai pricing is a little confusing since there's so much you can do.)

Thanks for any insight