diff --git a/packages/agent_dart_base/lib/agent/crypto/keystore/function.dart b/packages/agent_dart_base/lib/agent/crypto/keystore/function.dart
index 286d7f75..e39a9b71 100644
--- a/packages/agent_dart_base/lib/agent/crypto/keystore/function.dart
+++ b/packages/agent_dart_base/lib/agent/crypto/keystore/function.dart
@@ -1,3 +1,4 @@
+/// Documents packages/agent_dart_base/lib/agent/crypto/keystore/function.dart module purpose, public surface, and usage context
 part of 'key_store.dart';
 
 const String _algoIdentifier = 'aes-128-ctr';