`user.email` is always my email.
`user.name` is either my account name, or model name like `gpt-5.5-high`.
I can easily filter & blame which line was written by me or some specific AI
In that case, the "Co-authored-by: Copilot" method doesn't quite work either. You have to split the commit somehow.
> this is who’s driving the AI
As indicated by the consistent user.email value.