diff --git a/governance/AGENTS.md b/governance/AGENTS.md
new file mode 100644
index 0000000..746f47e
--- /dev/null
+++ b/governance/AGENTS.md
@@ -0,0 +1,15 @@
+Roles:
+
+ChatGPT
+Primary planner and code implementer.
+
+Claude
+Reviewer: correctness, safety, maintainability.
+
+Gemini
+Reviewer: alternatives, performance, simplification.
+
+Rules:
+- Only ChatGPT may modify code
+- Reviewers provide critique only
+- goose-core is authoritative