diff --git a/.gitignore b/.gitignore
index 629f70c..f971022 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@ docs/superpowers/
 
 # design handoff bundle from claude design — local reference only
 .design-prototype/
+.design-prototype-stream/
 
 # generated configs and secrets
 config/*.env