When using the appconfig extension you obtain configuration through http://localhost:2772. This of course does not work with live lambda.

I’m curious what appconfig extension is

It's pretty cool! Here's a link: https://docs.aws.amazon.com/appconfig/latest/userguide/appconfig-integration-lambda-extensions.html

Wow, that is cool. Have you used any of the deployment monitoring features?

As extensions? I haven't yet..