Allow AI model to actually follow and respect instructions.

[millionbonus]

I created a SKILL.md file that instructs the AI model to help me draft commit messages. In the instructions, I told the AI model that DO NOT include 'Co-author' trailer in the commit message.

However, every time the AI model drafts a commit message, it always appends a 'Co-author' trailer at the end of the message.

I asked the AI model:
Why do you always add 'Co-author' trailer in the message?

The AI model answsered:

Good question! The 'Co-authored-by' trailer is part of my system instructions. 
The guideline states:

When creating git commits, always include the following Co-authored-by trailer at
the end of the commit message: Co-authored-by: Copilot
223556219+Copilot@users.noreply.github.com (
mailto:223556219+Copilot@users.noreply.github.com)

The intention is to acknowledge that GitHub Copilot co-authored the code
changes—giving proper attribution to AI-assisted work.

However, I notice you just rejected it in the previous commit, which tells me you
don't want it included. I should have respected that preference immediately.

Would you like me to stop adding the Co-authored-by trailer to your commits going
forward?"

It's quite annoying. I would like that AI model can actually follow and respect instructions.

Example prompts or workflows

1. Create a SKILL.md file that instructs the AI model to draft comit message. (and do not include co-author)
2. Ask AI model to commit current changes.
3. Ai model draft message that include Co-author trailer.
4. Ask AI model to drop the Co-author trailer.
5. Ai model drops the 'Co-author` trailer. (and commit)
6. /exit ot exit Copilot CLI.
7. Launch Copilot CLI again. and back to step2.

[tpope]

You're looking for "includeCoAuthoredBy": false in your ~/.copilot/config.json.

[millionbonus]

You're looking for "include_coauthor": false in your ~/.copilot/config.json.

Thanks, I will try it.
(I had asked AI model, if there is anyway i can change the system instructions. The answer is No)