Does SST have any stuff to help build layers, maybe some kind of CI pipeline that uses CodeBuild ? Asking as the docs seem to assume you have a layer already in place, ie they ask for an ARN

We don't have tooling in place right now but I've done it before by just using

fs

and creating a folder and copying files into it. Do you have a sense of what you'd like a layer construct to take care of for you?

Maybe something to which you could pass a pip (python) package name/version, it runs a codebuild process to install that dependency and push to S3, then deploys that S3 package as a layer and gives you an arn in return, which you can use in an app. Probably needs an internal DDB table to manage series of package <=> layer links. Something like that.