Show HN: A calculus course with an AI tutor watching the lectures with you (calculus.academa.ai)

We're two PhD students in mechanical engineering. We spent years digging through scattered textbooks and YouTube rabbit holes. We figured there could be a better way to learn.

So we wrote a multivariable calculus course entirely in code: 18 lectures, 6 languages. All content and pedagogy are ours. As everything is code, we can feed the LLM the full context of every lecture. Ask a question mid-lecture, it knows what's on the screen, and answers from the actual content.

The recent Coursera/Udemy thread echoed a lot of what pushed us to build this: https://news.ycombinator.com/item?id=46301346

Would love feedback, especially on the tutor.