This is not a legal document. As of writing, this community is very small and is entirely run by one person. I could copy a well-thought-out code of conduct from somewhere else—or worse, I could try and come up with one on my own—but I don't think we'd benefit from either. If we find we could use an actual code of conduct, its writing should be collaborative: it should be owned by our community.
In the meantime, here is where I stand:
I am committed to combating racism, sexism, homophobia, transphobia, and really anything else that falls under the broad umbrella of terrible behavior. If you make someone else feel hurt or unsafe, I expect you to do whatever it takes to make it right, in real life and on this website.