I think we will be getting into an interesting situation soon, where project maintainers use LLMs because they truly are useful in many cases, but will ban contributors for doing so, because they can't review how well did the user guide the LLM.
Some sort of LLM audit trail is needed (containing prompts used, model identifier and marking all code written by LLM). It could be even signed by LLM providers (but that wouldn't work with local models). Append only standard format that is required to be included in PR. It wouldn't be perfect (e.g. deleting the log completely), but it might help with code reviews.
This would probably be more useful to help you see what (and how) was written by LLMs. Not really to catch bad actors trying to hide LLM use.
Maybe a future direction will be the submission of detailed research, specifications and change plans for feature requests. Something that can be assessed by a human and turned into working code by both slides.
The GPL talks about "the preferred form for modification of the software", and I'm starting to think that anything which involves any kind of LLM agent should be including all the text that the user gave to it as well. Prompts, etc.
Of course, even then it's not reproducible and requires proprietary software!
If an author of a PR just generated code with an LLM, the GitHub PR becomes an incredibly inefficient interface between a repository owner and the LLM. A much better use of the owner time would be to interact with LLM directly instead of responding to LLM generated PR, waiting for updates, responding again, etc.
I think guiding the LLM to write code is easy for them to write code by themselves.
The "interesting situation" is that maintainers are unable to cheaply distinguish slop from good contributions so they will simply stop accepting outside contributions.
This will cut off one of the genuine entry points to the industry where all you really needed was raw talent.
The bottlenecks today are:
* understanding the problem
* modelling a solution that is consistent with the existing modelling/architecture of the software and moves modelling and architecture in the right direction
* verifying that the the implementation of the solution is not introducing accidental complexity
These are the things LLMs can't do well yet. That's where contributions will be most appreciated. Producing code won't be it, maintainers have their own LLM subscriptions.