diff --git a/.gitignore b/.gitignore
index 4515627..9338690 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,9 @@
 *.env
 .env.*
 
+# local-only design docs (kept on disk, never pushed upstream)
+docs/ROTATION.md
+
 # editor / OS
 *.swp
 .DS_Store