Regarding reusability: I’m wanting to build a reusable library of sensible defaults for the various teams in my org, such as account number, default tags, etc. If I define these in stacks, will they be available/reusable when imported into another project?

Yes, if you define them in stacks you can use the outputs in other stacks with

StackReference

. There’s an example of this at https://github.com/pulumi/examples/blob/master/aws-ts-stackreference/.

Thanks, I’ll see if that works for us.

If they’re truly just constants and defaults, you could just publish them as a library (into nexus) and use them as an import into your pulumi application.

I’m not sure I follow. It looks like the company and department are separate stacks with outputs.

Yes, that's how it's implemented in that example.

Thanks, that’s the concept. I’ve just been exploring core Pulumi concepts to avoid reinventing the wheel.

Cross org capable as long as the user executing pulumi has appropriate access to all the orgs/stacks.