diff --git a/.gitignore b/.gitignore
index a1b5847..47b6d73 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,6 +27,7 @@ Thumbs.db
 .vscode/
 .idea/
 .claude/settings.local.json
+.design-sync/
 
 # Mission prompt scratch files (kept locally, not part of the product)
 step1.txt