diff --git a/packages/agent_dart_base/lib/agent/cbor.dart b/packages/agent_dart_base/lib/agent/cbor.dart
index cd78ba1b..dc48ef87 100644
--- a/packages/agent_dart_base/lib/agent/cbor.dart
+++ b/packages/agent_dart_base/lib/agent/cbor.dart
@@ -1,3 +1,4 @@
+/// Documents packages/agent_dart_base/lib/agent/cbor.dart module purpose, public surface, and usage context
 import 'dart:math' as math;
 import 'dart:typed_data';