CONTRIBUTING: limit AI assistance to code only (#9882)

I think at this point all moderators and helpers can agree with me in
that LLM-generated responses are a blight upon this Earth.

Also probably worth putting in a clause against AI-generated assets

CONTRIBUTING.md

@@ -17,14 +17,12 @@ it, please check out our ["Developing Ghostty"](HACKING.md) document as well.
 
 > [!IMPORTANT]
 >
-> If you are using **any kind of AI assistance** to contribute to Ghostty,
-> it must be disclosed in the pull request.
+> The Ghostty project allows AI-**assisted** _code contributions_, which
+> must be properly disclosed in the pull request.
 
 If you are using any kind of AI assistance while contributing to Ghostty,
 **this must be disclosed in the pull request**, along with the extent to
 which AI assistance was used (e.g. docs only vs. code generation).
-As a small exception, trivial tab-completion doesn't need to be disclosed,
-so long as it is limited to single keywords or short phrases.
 
 The submitter must have also tested the pull request on all impacted
 platforms, and it's **highly discouraged** to code for an unfamiliar platform
@@ -32,10 +30,49 @@ with AI assistance alone: if you only have a macOS machine, do **not** ask AI
 to write the equivalent GTK code, and vice versa — someone else with more
 expertise will eventually get to it and do it for you.
 
-Even though using AI to generate responses on a PR is allowed when properly
-disclosed, **we do not encourage you to do so**. Often, the positive impact
-of genuine, responsive human interaction more than makes up for any language
-barrier. ❤️
+> [!WARNING]
+> **Note that AI _assistance_ does not equal AI _generation_**. We require
+> a significant amount of human accountability, involvement and interaction
+> even within AI-assisted contributions. Contributors are required to be able
+> to understand the AI-assisted output, reason with it and answer critical
+> questions about it. Should a PR see no visible human accountability and
+> involvement, or it is so broken that it requires significant rework to be
+> acceptable, **we reserve the right to close it without hesitation**.
+
+**In addition, we currently restrict AI assistance to code changes only.**
+No AI-generated media, e.g. artwork, icons, videos and other assets is
+allowed, as it goes against the methodology and ethos behind Ghostty.
+While AI-assisted code can help with productive prototyping, creative
+inspiration and even automated bugfinding, we have currently found zero
+benefit to AI-generated assets. Instead, we are far more interested and
+invested in funding professional work done by human designers and artists.
+If you intend to submit AI-generated assets to Ghostty, sorry,
+we are not interested.
+
+Likewise, all community interactions, including all comments on issues and
+discussions and all PR titles and descriptions **must be composed by a human**.
+Community moderators and Ghostty maintainers reserve the right to mark
+AI-generated responses as spam or disruptive content, and ban users who have
+been repeatedly caught relying entirely on LLMs during interactions.
+
+> [!NOTE]
+> If your English isn't the best and you are currently relying on an LLM to
+> translate your responses, don't fret — usually we maintainers will be able
+> to understand your messages well enough. We'd like to encourage real humans
+> to interact with each other more, and the positive impact of genuine,
+> responsive yet imperfect human interaction more than makes up for any
+> language barrier.
+>
+> Please write your responses yourself, to the best of your ability.
+> If you do feel the need to polish your sentences, however, please use
+> dedicated translation software rather than an LLM.
+>
+> We greatly appreciate it. Thank you. ❤️
+
+Minor exceptions to this policy include trivial AI-generated tab completion
+functionality, as it usually does not impact the quality of the code and
+do not need to be disclosed, and commit titles and messages, which are often
+generated by AI coding agents.
 
 An example disclosure:
 
@@ -60,13 +97,6 @@ work than any human. That isn't the world we live in today, and in most cases
 it's generating slop. I say this despite being a fan of and using them
 successfully myself (with heavy supervision)!
 
-When using AI assistance, we expect a fairly high level of accountability
-and responsibility from contributors, and expect them to understand the code
-that is produced and be able to answer critical questions about it. It
-isn't a maintainers job to review a PR so broken that it requires
-significant rework to be acceptable, and we **reserve the right to close
-these PRs without hesitation**.
-
 Please be respectful to maintainers and disclose AI assistance.
 
 ## Quick Guide