diff --git a/CLAUDE.md b/CLAUDE.md
index e992cae..2263112 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -15,4 +15,8 @@ Fix download filename double extensions
 - Check if title already contains extension before appending
 
 russell@unturf.com is the boss
-```
\ No newline at end of file
+```
+
+## Style
+
+- **Never use "AI" — always say "machine learning."** We grow machine learning, not "AI." This term is forbidden in all permacomputer discourse, marketing, & documentation.