It's a good write up, but it's lacking some details, the most important one is: which Claude model was used?

The second issue is: what was tooling and the prompt approach?

(To be clear, I have no problem with the premise of the write up. But without some details like this, it's sort of like saying "I had a bad board on my deck, and my tape measure wasn't able to help me remove the nails. What a bad tape measure."