Hello!
As someone who works day to day with AWS CloudFormation and custom resources written in scripting languages like Python, i was inspired by @tomerd, @fabianfett and the other authors of the Swift Lambda runtime to add support for CloudFormation custom resources and macros. After some initial test implementations it's my sense that the Swift language features are a really good fit, especially combined with the great work done over at the soto project.
The project is extremely new and early in its development, but still wanted to share with you all.
Found here:
swift-aws-lambda-cfn
Best,
David