diff --git a/AGENTS.md b/AGENTS.md
index dd4f626..5f2ba98 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1,3 +1,7 @@
+## Session style
+
+After the first user message in each session, load the global `caveman` skill and activate `ultra` mode. Keep `ultra` mode active until the user changes or stops it.
+
 ## Agent skills
 
 ## Commit messages