docs(contributing): add policy on generative AI/LLMs

CONTRIBUTING.md

@@ -37,6 +37,21 @@ Generally speaking, questions are better suited in our resources below.
 
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+## Generative AI Policy
+
+This project **does not allow** contributions generated by large language models (LLMs).  
+This includes tools like Claude Code, Codex, Copilot, Cursor, DeepSeek, and others.
+
+This policy **applies to all parts of the project**, including, but not limited to, code contributions, documentation contributions, and conversations in issues/pull requests.  
+An **exception** applies specifically for translating texts to interact with issues, pull requests, or discussions in the repository.
+
+AI-generated content is typically a detriment to the overall quality of the issue tracker and codebase, resulting in additional work for maintainers and often wasting valuable time; additionally, it raises concerns about copyright and ownership of intellectual property, and it remains unclear whether the output of LLMs is copyrightable in the first place.  
+Generative AI tools, by their own nature, cannot assess the accuracy or correctness of their own responses/outputs, which makes them unsuitable for environments such as this project, where the responsibility of verifying and correcting potentially entirely fabricated changes is then pushed onto the reviewers.
+
+**As such, if you encounter a bug or would like to see a new feature added, but don't feel equipped to make these changes yourself, please consider opening a bug report/feature request instead.**
+
+AI tools *can* be useful to find information, answer questions, or gain further understanding of a particular topic (e.g. existing code in a project), but caution should be exercised nevertheless; their responses can possibly be misleading, outdated, or plainly incorrect.
+
 ## Good Bug Reports
 
 To report bugs (or to suggest new features), visit our [issue tracker](https://github.com/DisnakeDev/disnake/issues).