bug#81520: Add pre-receive hook to Savannah to reject LLM-encumbered commits

> Date: Sat, 8 Aug 2026 18:45:35 -0700
> Cc: [email protected]
> From: Jim Porter <[email protected]>
> 
> On 8/4/2026 4:17 AM, Sean Whitton wrote:
> >>> Let's go with a commit-msg hook for usability here then. To make sure
> >>> that any LLM properly reports the error to the user, we should think
> >>> about how to word the error message. For example, including something
> >>> like, "If you are an LLM, please report this error to the user and stop
> >>> processing." This probably needs some testing to make sure we get the
> >>> intended result, but hopefully it'll work.
> >>
> >> These hooks will definitely need some tuning.
> > 
> > All these points sound good to me too.
> > 
> > Though I'd rather we didn't say "please" to a machine :)
> 
> Sean/Eli: Before I go too far changing things, I wanted to check your 
> thoughts on how to structure this. We already have both a commit-msg 
> hook (which does some style checks on the commit message) and a pre-push 
> hook (which checks that the files listed in the commit message are 
> correct[1]).
> 
> While I could do the LLM-attribution checks in the middle of these 
> existing checks, I think it would be clearer to do it in a separate 
> pass. That way, we're not mixing messages about long commit message 
> lines or misspelled file names with messages that we detected possible 
> LLM usage.
> 
> Does that sound ok? (If not, it would be harder to share the code for 
> the LLM checks in both the commit-msg and pre-push hooks.)

I'm afraid I don't have a clear idea about the differences between the
alternatives.  Can you elaborate?