Document non-string value auto-conversion in Postman import

converters/postman-to-bruno.mdx

@@ -3,6 +3,10 @@ title: "Postman Conversions"
 sidebarTitle: "Postman to Bruno"
 ---
 
+<Info>
+  Postman allows non-string values (such as numbers) in headers, query parameters, path parameters, and body fields. The converter automatically converts these to strings — for example, `100` becomes `"100"` and `null` becomes an empty string `""`.
+</Info>
+
 <Tabs>
   <Tab title="Collection">
   ### Convert Postman collection to Bruno collection

get-started/import-export-data/postman-migration.mdx

@@ -20,6 +20,10 @@
 
 Now simply follow the instructions for [Importing Collections](/get-started/import-export-data/import-collections) and you're done!
 
+<Info>
+  Postman allows non-string values (such as numbers or booleans) in request headers, query parameters, path parameters, and body fields. Bruno expects all of these values to be strings, so during import they are automatically converted — for example, `100` becomes `"100"` and `null` becomes an empty string `""`.
+</Info>
+
 ## Export Data Dump
 
 <Callout type="default">
@@ -108,5 +112,5 @@
 </Info>
 
 <Info>
   Postman allows variable values to be numbers, booleans, or objects, but Bruno stores all variable values as strings. During import, non-string values are automatically converted — for example, `5000` becomes `"5000"`, `true` becomes `"true"`, and objects are serialized as JSON strings.
 </Info>