Add CONTRIBUTING.md

[jmroot]

The first section is mostly codifying things that have always been implicit. The second section adopts what appears to be the emerging de facto standard for tagging AI use.

There's obviously a lot more that could be said, but I've tried to keep it minimal so people are likely to read the whole thing. Please discuss on macports-dev in order to reach a wider audience.

[pmetzger]

I like most of this, but I would suggest clarifying that asking your AI to pull something is not the same as having it do it without supervision and is okay, i.e. "okay, now that we've tested this, please push it to our fork and then do a pull request" should be explicitly fine and is not the same as having someone turn on a slop cannon. The problem is having someone mindlessly run an AI against the repo without supervision and inundate us with low quality requests, and it should probably be explained that that is the real underlying problem, that is to say, creating work for human beings rather than saving them work.

I think we should also finally get rid of Trac; it just makes running the project harder by dividing attention and making it less obvious how to do requests. But that is a distinct question. I think the work could now be done in under two days using AI assistance and scripting, for what it's worth, possibly in less than a single day. Everything that Trac provides can be provided by GitHub.

[herbygillot]

I think we should also finally get rid of Trac
Everything that Trac provides can be provided by GitHub.

I agree with @pmetzger here. The modern user is much more likely to engage with Github rather than Trac.

Overall, I think the proposed guidelines are reasonable, and make adequate allowances for AI use.

[mascguy]

Looks great to me!

[neverpanic]

Looks good to me as well.

I think we should even remove the references to Trac — it requires login with GitHub anyway, so probably everybody that knows how to create a patch and attach it to a Trac ticket can also open a PR, in which case we shouldn't even advertise the alternative method.

As for getting rid of Trac, I'm not opposed, but it's a discussion we should have on the mailing list.

[pmetzger]

+1 on eliminating references to Trac.

[pmetzger]

Per @neverpanic , it is probably best to remove the Trac references entirely.

[pmetzger]

Again, see @neverpanic's comment, we should probably just not mention Trac any longer.

[pmetzger]

Add, perhaps, "(Using AI systems to open requests is acceptable if they are closely supervised. Again, you are responsible for your agents' actions.)"