diff --git a/.gitignore b/.gitignore
index 77cfc32..1c220e1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,5 +20,8 @@ app/assets/test-results/
 # pi agent tool state for the app sub-project (logs, npm cache)
 app/.pi/
 
+# macOS screenshots (session evidence lives in the transcript, not in git)
+Screenshot*.png
+
 # nono sandbox scratch space
 nono/