diff --git a/.gitignore b/.gitignore
index f7feee2..da786cc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,9 @@ build/
 coverage/
 .vitest/
 
+# Self-play transcripts (operator scratch)
+tmp/
+
 # Editor / OS
 .DS_Store
 .idea/