docs: doc expectations of ai-assisted contributions

CONTRIBUTING.md

@@ -318,6 +318,25 @@ Not breaking changes:
   * Changing internal details, such as renaming an internal file.
   * Changing a rule to a macro.
 
+## AI-assisted Contributions
+
+Contributions assisted by AI tools are allowed. However, the human author
+submitting the pull request is responsible for the contributed code as if they
+had written it entirely themselves. This means:
+
+*   **Understanding the code:** You must be able to explain what the code does
+    and why it's implemented that way. This includes discussing its
+    implications, and any trade-offs made during its development, just as if you
+    had written it entirely yourself.
+*   **Vetting the correctness and functionality:** You are responsible for
+    thoroughly testing and verifying that the code is correct, functional, and
+    meets all project requirements and standards.
+
+If the human PR author cannot fulfill these responsibilities, the `rules_python`
+maintainers will not spend time reviewing or merging the PR. The goal is to
+ensure that all contributions, regardless of their origin, maintain the quality
+and integrity of the project and do not place an undue burden on maintainers.
+
 ## FAQ
 
 ### Installation errors when during `git commit`