chore: add artificial intelligence contribution guidelines

CONTRIBUTING.md

@@ -110,9 +110,31 @@ Before creating a pull request, rebase your branch on the repository's `main` br
 
 ## 6. Opening a Pull Request
 
-Once your changes are ready, open a pull request.
+Once your changes are ready, open a Pull Request. (Refer to GitHub's [official documentation](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request-from-a-fork).)
 
-For instructions on creating a PR from a fork, refer to GitHub's [official documentation](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request-from-a-fork).
+Before requesting a review, please ensure your work compiles and runs as intended. Note that reviewers are not responsible for guiding contributors through code debugging.
+
+### Guidelines about AI usage
+
+At Zama, we believe that human reasoning, critical thinking, and authentic communication during development could bring more value than LLMs.
+
+We therefore expect contributors to follow these guidelines when using AI:
+
+1. **Clearly disclose AI assistance** in your PR description. For example:
+    > "I consulted ChatGPT to understand part of the codebase, but the implementation was written manually by me."
+
+    >  "This PR includes code suggestions generated by Claude Code, which I reviewed, modified, and validated."
+
+  - Please note:
+    - Pull Requests that include AI-generated code **without clear disclosure and human review** will not be accepted
+    - You must be able to **explain and justify** every part of the submitted code.
+    - The final contribution must reflect **your own reasoning, understanding, and design decisions**.
+
+2.  Avoid lengthy or wordy AI-generated texts:
+  - Use AIs for inspirations but never let them speak for you 100%.
+  - We recommend writing your own GitHub issues, comments, and PR descriptions. Perfect grammar is not required, authenticity is valued more than polish.
+
+Respecting these guidelines shows respect for the community and ensures efficient and valuable contributions.
 
 ## 7. Continuous integration