diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 00000000000..7640dfc32f1
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,8 @@
+# AGENTS.md
+
+Read [CONTRIBUTING.md](CONTRIBUTING.md) first. It is the source of truth for repository layout,
+build and test commands, style expectations, and scope.
+
+Additional guidance for agents:
+
+* Prefer small, localized changes over broad refactors.