[lazzurs]

Importing from the state would be good.

Doing this with resources is going to be the easy path. Translating the state representation of re-usable modules I expect is going to be more difficult but necessary for the migration path to be useful. A lot of power in Terraform is being able to stack re-usable components, say an internal module representing a service on top of a public module that provides sensible defaults like the terraform-aws-modules collection which then sits on top of resources.

If you can get this to a place where an existing deployment of Terraform modules can be imported into SI as a collection of re-usable templates and then users can easily deploy n+1 of those templates the same way they would do with Terraform I think you will have an easy migration path.

If not importing from the state at least some way of automatically importing those re-usable components and allowing the deployment of n+1 of a reusable component would be helpful to migration from existing patterns.