"The project does support config. So if you want to change (e.g.) the number of AZs, you can say..."

Cool, is it possible to do that without having to use the CLI? Are you doing any sort of state locking here? I've seen ops teams get saved from potentially horrible situations by Terraform's dynamodb state locking.

"You can make this into a library using standard language techniques like classes, functions, and packages."

That's pretty nice and it seems like it'll get you the same functionality as a Terraform module. Do you have any plans of releasing something like the Terraform Registry to help with discoverability?

Also, do you have any docs on writing providers? I've had to do that a few times for Terraform and getting up and running with that was pretty easy as a Go developer. I wouldn't really want to do that for every supported language though (no offense C#).

I'm seeing that some of this is using codegen to read the equivalent Terraform provider and generate the Pulumi provider from that schema. Is that the preferred workflow here for providers that already exist in the Terraform ecosystem?