Merge pull request #6225 from segmentio/ashton-huxtable-patch-2

Add information about traits and adding to context for new mobile lib…

Author: pwseg

src/connections/spec/common.md

@@ -210,6 +210,8 @@ Other libraries only collect `context.library`, any other context variables must
 
 - userAgentData is only collected if the [Client Hints API](https://developer.mozilla.org/en-US/docs/Web/API/User-Agent_Client_Hints_API){:target="_blank"} is available on the browser.
 
+- Segment doesn't collect or append to the context of subsequent calls in the new mobile libraries (Swift, Kotlin, and React Native). 
+
 To pass the context variables which are not automatically collected by Segment's libraries, you must manually include them in the event payload. The following code shows how to pass `groupId` as the context field of Analytics.js's `.track()` event:
 
 ```js
@@ -218,6 +220,11 @@ analytics.track("Report Submitted", {},
 );
 ```
 
+To add fields to the context object in the new mobile libraries, you must utilize a custom plugin. Documentation for creating plugins for each library can be found here:
+- [React Native](/docs/connections/sources/catalog/libraries/mobile/react-native/#plugin-architecture)
+- [Swift](/docs/connections/sources/catalog/libraries/mobile/apple/swift-plugin-architecture/)
+- [Kotlin](/docs/connections/sources/catalog/libraries/mobile/kotlin-android/kotlin-android-plugin-architecture/)
+
 
 ## Integrations