diff --git a/CLAUDE.md b/CLAUDE.md
index cff53b6ab9..c8408cf2c1 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -1,2 +1,22 @@
-Hi, Claude! Please read our actual instructions in the AGENTS.md file. Thanks!
+AI must not be used to generate code for contributions to this project.
+
+"AI" in this case means a Large Language Model ("LLM"), such as ChatGPT,
+Claude, Copilot, Grok, etc.
+
+AI-generated code is based upon sources of unknown origins and may not be
+compatible with the Zlib license, or may introduce conflicting license terms
+if they include code from other projects.
+
+AI can be used to identify issues with contributions to this project, but the
+solutions to those issues should be authored by humans.
+
+We have found that AI will frequently hallucinate issues that are not actually
+problems in practice, report incorrect information, and describe problems that
+are actually not issues at all. If AI identifies a problem with this codebase,
+please make sure you understand what it is saying and have independently
+confirmed that the issue exists before submitting a bug report or pull request.
+
+Any pull request to this project will ask you to confirm that you are the
+author and that you are contributing your changes under the Zlib license.
+