diff --git a/api-extractor.json b/api-extractor.json
index 839eba136be..5d26120d66a 100644
--- a/api-extractor.json
+++ b/api-extractor.json
@@ -1,3 +1,4 @@
+// this the shared base config for all packages.
 {
   "$schema": "https://developer.microsoft.com/json-schemas/api-extractor/v7/api-extractor.schema.json",