I am not sure if there were recent changes to the pages, but:
I don’t see an instance of the phrase “We suggest submitting links with a short description.” on the “About” page.
The “About” page links to the new users guide which is probably what you were looking for, even if that’s not quite a charter. Apologies if you already read it.
Granted I see no clear indication on that page that debates are welcome in the comments of all posts (and indeed I think there are some rare exceptions). But it does list a few things about “conversations” on the site, for example “we try to focus on what would change our minds”.
I second that getting an AI to agree with your ideas proves very little. Also, it is somewhat intuitive to me that academia would always be suffering from various affective death spiral dynamics. You seem to have a specific one in mind, but I am not sure what it is or how it relates to the post.