That's like 10% of the reason why people would commit CLAUDE.md…

The number one reason is, you are on a 10-dev tea and it just doesn't make sense for everyone to waste their token budget creating separate instances of this file, which an also requires ingesting the othe whole repo... That is 50, 60%.

The other bit is that you have a review pipeline hooked into CI/CD, and it is the easiest way to tell the bot how to review your code.