Smithy is _very_ similar to Coral (an internal library within Amazon).
Coral is used by every AWS service -- every AWS service defines their APIs using Coral, and if you want to interact with another service you use a generated client.
The client can generally be used as-is, though sometimes you might want some custom client code. In the case of a generated client you can just grab the API definition of the API you want to call, generate the client in the language of your choice, and... that's it!
For the server, you still have to implement the logic of how to form the responses, but what the request/responses look like it enforced by the framework.
I'm leaving out a _lot_ of details. Coral is incredibly powerful and can do a lot of things for you for free. Smithy is, from what I can see, the same idea.
Coral is used by every AWS service -- every AWS service defines their APIs using Coral, and if you want to interact with another service you use a generated client.
The client can generally be used as-is, though sometimes you might want some custom client code. In the case of a generated client you can just grab the API definition of the API you want to call, generate the client in the language of your choice, and... that's it!
For the server, you still have to implement the logic of how to form the responses, but what the request/responses look like it enforced by the framework.
Here's an example: https://gist.github.com/shepherdjerred/cb041ccc2b8864276e9b1...
I'm leaving out a _lot_ of details. Coral is incredibly powerful and can do a lot of things for you for free. Smithy is, from what I can see, the same idea.