If you go to this[0] link, you'll see a bunch of nodes in a graph. Each one represents an AWS Lambda that will be deployed (and an API endpoint). The edges between are "microservice" calls between Lambdas that get configured with the deploy too.
That's all coming from a Git repo here[1].
And if you edit the project by adding more blocks, it will actually push a commit to Git (if you're signed up and auth'd GitHub). Each block is just a folder, and the "project" is a YAML file. We have a bi-directional "compiler" that lifts/drops the project in either direction.
This library made it super easy to ship this. We tried using the server first and it was a huge pain. We just had to setup a GitHub proxy to make this work. It's stateless now (your browser does the work) :)