GPT from GPT: de novo microgpt

I started this project after watching Andrej Karpathy's recent interview on No Priors where he explained that he had to hand-write microgpt, a 200-line GPT implementation in Python which distills the essence of all the algorithms behind creating Transformers, because the LLMs he asked weren't able to do it.

I wanted to test if this is still true: whether a "microgpt" in that spirit could be brought into existence with minimal manual intervention, just clear expression of intent to an LLM. This is an experiment not just in producing a tiny GPT artifact, but in seeing how close you can get to the essence of microgpt just through careful prompting, without writing a single line yourself.