Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -47,12 +47,40 @@ When working on spec-kit:
 
 ## AI contributions in Spec Kit
 
+> [!IMPORTANT]
+>
+> If you are using **any kind of AI assistance** to contribute to Spec Kit,
+> it must be disclosed in the pull request or issue.
+
 We welcome and encourage the use of AI tools to help improve Spec Kit! Many valuable contributions have been enhanced with AI assistance for code generation, issue detection, and feature definition.
 
+That being said, if you are using any kind of AI assistance (e.g., agents, ChatGPT) while contributing to Spec Kit,
+**this must be disclosed in the pull request or issue**, along with the extent to which AI assistance was used (e.g., documentation comments vs. code generation).
+
+If your PR responses or comments are being generated by an AI, disclose that as well.
+
+As an exception, trivial spacing or typo fixes don't need to be disclosed, so long as the changes are limited to small parts of the code or short phrases.
+
+An example disclosure:
+
+> This PR was written primarily by GitHub Copilot.
+
+Or a more detailed disclosure:
+
+> I consulted ChatGPT to understand the codebase but the solution
+> was fully authored manually by myself.
+
+Failure to disclose this is first and foremost rude to the human operators on the other end of the pull request, but it also makes it difficult to
+determine how much scrutiny to apply to the contribution.
+
+In a perfect world, AI assistance would produce equal or higher quality work than any human. That isn't the world we live in today, and in most cases
+where human supervision or expertise is not in the loop, it's generating code that cannot be reasonably maintained or evolved.
+
 ### What we're looking for
 
 When submitting AI-assisted contributions, please ensure they include:
 
+- **Clear disclosure of AI use** - You are transparent about AI use and degree to which you're using it for the contribution
 - **Human understanding and testing** - You've personally tested the changes and understand what they do
 - **Clear rationale** - You can explain why the change is needed and how it fits within Spec Kit's goals  
 - **Concrete evidence** - Include test cases, scenarios, or examples that demonstrate the improvement
@@ -72,6 +100,8 @@ The key is demonstrating that you understand and have validated your proposed ch
 
 Contributors who consistently submit low-effort AI-generated changes may be restricted from further contributions at the maintainers' discretion.
 
+Please be respectful to maintainers and disclose AI assistance.
+
 ## Resources
 
 - [Spec-Driven Development Methodology](./spec-driven.md)