Eh, agents commits are always too verbose. I don't need a 3 paragraph mini novel. Design can go in a design docs folder, project info goes in the issue tracker.

The commit should be a short summary <1 paragraph for quick context

I instruct the agents to do the commit messages they way i want them written. They don't produce a book everytime, they produce what I think it's useful.

Just put your last sentence in your AGENTS.md then

Codex is the opposite problem. If you don't aggressively prompt it, and let it write commit messages it will literally just do one incomprehensible line.

Claude will write a novel, sign it with its signature like it's a person, and fill it full of advertisement language and marketing text.

No, it should be short when there's little to say, and long when there's lots to say about things best written in a commit message