Bug fix

api.go

@@ -134,6 +134,10 @@ func (a *Agate) SaveSnapshot(ctx context.Context, name string, parentID string)
 	}
 
 	// If parentID is not provided, use the current snapshot ID
+	if parentID == "" {
+		parentID = a.currentSnapshotID
+	}
+
 	effectiveParentID := parentID
 
 	// Create the snapshot