SAM solves a different set of problems from the frameworks like Chalice. It does not address the app request/response API, deployment package building process a

SAM solves a different set of problems from the frameworks like Chalice. It does not address the app request/response API, deployment package building process and dependency bundling, the test-development cycle, routing and other API Gateway configuration specifics. Also, Chalice is a first party framework in that it's led by an AWS affiliated developer.