This is also an example of how someone's personal settings don't belong in a source code repo at all.

I find it pretty annoying when someone commits their harness specific files into a repo - put that stuff under $HOME/.claude/

it depends. Sharing AGENTS.md and skills is a common thing binding all harnesses to project conventions and processes. In my org for example this enforces security review, certain level and type of test coverage, documentation conventions etc.

To be fair, things like AGENTS.md aren't supposed to contain secrets, and are helpful to publish for OSS developers who want agentically-written third-party contributions to follow certain rules.