To add the AWS AppConfig Agent Lambda extension to an AWS Lambda function, you can open the documentation, scroll through a table of ARNs, find the one that matches your AWS Region and architecture, copy it, and paste it into your template. However, a few months later, AWS publishes a new version and now your deployment is silently using an older one. There’s a better approach that uses public parameters in AWS Systems Manager Parameter Store (Parameter Store). What are public parame...