Semantic git commits have been a thing for years - https://www.conventionalcommits.org/en/v1.0.0/

I've always liked them and tried to convince others to use them

AI models seem to like them as well

This was a thing before LLMs, but you’d frequently see it in open source repos. So LLMs are just regurgitating what they saw.

Not an AI thing per-se [1] but may be pushed by or increased in usage by the agents.

[1] https://www.conventionalcommits.org/en/v1.0.0/#summary

Used it for years in part because of https://git-cliff.org/