diff --git a/model/stored-items/chat-size.md b/model/stored-items/chat-size.md
index e8b97e0..c35e85a 100644
--- a/model/stored-items/chat-size.md
+++ b/model/stored-items/chat-size.md
@@ -1,8 +1,9 @@
 ---
 id: 01a108de-7c37-7b65-a051-0ca54a5997b0
 source: Local
-mechanism: session-storage
+mechanism: local-storage
 necessity: optional
+duration: Until the visitor clears it
 surfaces:
   - chat.guestgraph.io chat
 ---