The sneaky commit modification is triggered by very modest usage of AI such as auto-completion.
Look, if an agent writes the code and the commit message then adding a Co-authored-by by default is ok. Not even showing it before the commit is made is not, and adding the message when AI was just completing code is not.
Glorified autocomplete, syntax reminder and random snippet generator thinks it's co-authoring things.
I genuinely think it's not ok even then. Copilot is a tool, one of many I use. That tool has no business polluting commit messages without my knowledge.
The appended message isn't even adding any new information, as in this day and age a vast majority of commits is probably "co-authored" by an LLM.