intermediate

app/lib/utils/langchain_utils.dart

@@ -0,0 +1,15 @@
+import 'dart:typed_data';
+
+import 'package:langchain/langchain.dart';
+
+String combineDocuments(
+  List<Document> documents, {
+  String separator = '\n\n',
+}) {
+  return documents.map((d) => d.pageContent).join(separator);
+}
+
+Uint8List serializeVector(List<double> vector) {
+  final buffer = Float32List.fromList(vector).buffer;
+  return Uint8List.view(buffer);
+}