docs: introduce AI Policy

AI_POLICY.md

@@ -0,0 +1,58 @@
+## AnkiDroid AI Tool Use Policy
+
+We expect that contributors will provide a net benefit to AnkiDroid over time, in return we offer 
+ mentorship and guidance.
+
+AI generated contributions are nullifying our mentorship efforts by consuming guidance meant for 
+ humans and shifting the responsibility of ensuring correctness onto our code reviewers.
+
+This policy aims to:
+
+* Ensure contributors can contribute without AI assistance.
+* Provide reviewers with a framework to block contributions which do not benefit AnkiDroid.
+* Ensure mentors are mentoring people, not AI output.
+
+### New Contributors
+
+Before you have 3 merged pull requests, you may **not** use any AI tools to produce contributions 
+ for AnkiDroid.
+This includes code, documentation, and GitHub comments (including spelling and grammar corrections).
+
+If a reviewer suspects that **any** part of a contribution is produced with AI tools, a warning will
+ be issued. Pull requests may be closed at the reviewer's discretion.
+
+You may be banned from the repository if this occurs a second time.
+
+### Contributors
+
+* You **must** be able to explain all your contributions.
+* AI tools **should not** be used to produce GitHub comments, including filling in the pull request 
+  template.
+* Contributions that make nontrivial use of AI tools **must** be labelled, with the tool version.
+
+**Commit messages** **must** use the `Assisted-by:` 
+ [git trailer](https://git-scm.com/docs/git-interpret-trailers#_description) with an explanation
+ of the contributions in the description.
+
+
+```
+docs: example title
+
+[Optional commit description]
+
+GPT-5.2 implemented `complexMethod`
+
+Assisted-by: GPT-5.2
+Assisted-by: Claude Opus 4.5 [Proofreading/grammar]
+```
+
+**GitHub comments** **must** use the `> [!NOTE]` 
+ [alert](https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts).
+
+```md
+> [!NOTE]  
+> The following table was generated using Claude Opus 4.5 
+```
+produces:
+> [!NOTE]  
+> The following table was generated using Claude Opus 4.5

CONTRIBUTING.md

@@ -21,6 +21,17 @@ Discord is great for real-time/casual conversations. Records of the outcomes of
 discussions should be copied to the relevant PR/issue (ideally linking to the Discord message).
  It's not expected that Discord history will be permanently retained.
 
+## AI Policy
+
+> [!CAUTION]
+> Using AI tools as a new contributor will result in moderator action.
+
+New contributors **may not** use any AI tools to produce contributions for AnkiDroid. This includes 
+ code, documentation, and GitHub comments (including spelling and grammar corrections).
+
+See our [AI policy](AI_POLICY.md) for when these restrictions are lifted from your account, and why 
+ they exist.
+
 ## Selecting an issue [[GitHub Search](https://github.com/ankidroid/Anki-Android/issues?q=is%3Aissue%20state%3Aopen)]
 
 If you are starting out with open source, we recommend starting with: [#13282: Fix Android Studio Warnings](<https://github.com/ankidroid/Anki-Android/issues/13282>).