Add AI usage guidelines to contribution guidelines

contribute/contribution-guidelines/_index.md

@@ -85,6 +85,20 @@ Before proposing to add a new dependency, make sure you do this:
 - **Consider the dependency's license**. Dependencies included in PrestaShop must be compatible with PrestaShop's license. [Here's a list][compatible-licenses].
 
 
+## On AI use in contributions
+
+We recognize that AI-powered tools can be helpful assistants in the development process. You are welcome to use AI tools to help you write code, documentation, or other contributions to PrestaShop.
+
+However, when using AI assistance, you must take full responsibility for your contributions:
+
+- **Review and understand all code**. You must carefully review, test, and understand any AI-generated code before submitting it. Do not blindly copy and paste AI suggestions without verification.
+
+- **Verify correctness**. AI tools can generate incorrect, outdated, or fabricated information. You are responsible for ensuring that your contribution is accurate, functional, and follows PrestaShop's architecture and best practices.
+
+- **Meet quality standards**. AI-assisted code must still meet all our contribution requirements: follow coding standards, be well-documented, include appropriate tests, and adhere to our guidelines. If reviewers can easily spot that code was generated by AI without proper review, it will likely be rejected.
+
+Remember: the goal is to produce high-quality contributions that improve PrestaShop. AI is a tool to assist you, but you remain the author and are accountable for the quality and accuracy of your work.
+
 ## Related topics
 
 - [What happens after you submit a contribution]({{< relref "/9/contribute/contribution-process/how-pull-requests-are-processed" >}})