Understanding AWS Blocks as a CDK Developer

I tried out AWS Blocks, announced as a preview on June 17, 2026, from the perspective of someone who normally writes AWS CDK.

What Is AWS Blocks?

AWS Blocks is a toolkit for quickly building the backend of a full-stack app. It was announced as a preview on June 17, 2026, and its source code is published as open source at aws-devtools-labs/aws-blocks.

At its center is a component called a Building Block. It is a unit of functionality such as a data store or authentication, and a single Building Block plays the following three roles at the same time.