diff --git a/lang/runtime/engram.el b/lang/runtime/engram.el
index 08930f0..60015cd 100644
--- a/lang/runtime/engram.el
+++ b/lang/runtime/engram.el
@@ -17,6 +17,7 @@ fn engram_valid_node_type(t: String) -> Bool {
         || str_eq(t, "Artifact") || str_eq(t, "Conversation") || str_eq(t, "ExecutionContext")
         || str_eq(t, "InternalStateEvent") || str_eq(t, "Self") || str_eq(t, "Entity")
         || str_eq(t, "Process") || str_eq(t, "ConfigEntry") || str_eq(t, "Concept") || str_eq(t, "Imprint")
+        || str_eq(t, "SessionSummary")
 }
 
 fn engram_valid_tier(t: String) -> Bool {