diff --git a/.gitignore b/.gitignore
index 8038817..629f70c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,9 @@ docs/superpowers/
 # claude code per-project state
 .claude/
 
+# design handoff bundle from claude design — local reference only
+.design-prototype/
+
 # generated configs and secrets
 config/*.env
 !config/*.env.example