diff --git a/packages/instrumentation-langchain/src/callback_handler.ts b/packages/instrumentation-langchain/src/callback_handler.ts
index 39db59fd..70a1e559 100644
--- a/packages/instrumentation-langchain/src/callback_handler.ts
+++ b/packages/instrumentation-langchain/src/callback_handler.ts
@@ -1,3 +1,4 @@
+/** Documents packages/instrumentation-langchain/src/callback_handler.ts module purpose and public usage context */
 /*
  * Copyright Traceloop
  *