Android auto messaging (support app??)

Android auto has limitations for 3rd party apps. Currently media and messaging are supported, navigation is sparse

What I would like to be able to is retrieve notifications from certain apps and make them visible in Android auto.

I can read them out loud already, but I would like to see them handled as messages. 

For. Instance 

A Co worker posts via slack.

A notification is triggered

This notification is captured within tasker (via autonotification )

Tasker sends it (via support app? ) to trigger a card in Android auto

(alternative route could be to hijack the signature of an existing message app like WhatsApp to trigger a notification)