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Have you looked into stack references? <https://www.pulumi.com/docs/intro/concepts/stack/#stackreferences>

BTW stack references can only be used when using Pulumi Service, or can be used for example with S3 as a backend?

there don't seem to be any options indicating how it would be able to retrieve a stack from a specified backend..

You can use stack references from any backend. A user wrote a blog post on this recently which I'm just hunting out

<https://martinjt.me/2021/03/04/pulumi-multiple-projects-with-custom-backends/>

yup - read that - just didn't see how it magically figured out where that stack was located.. I'm presuming that the stack location MUST be in the same backend (whatever that might be) as the current project configuration right?

well, might as well test it out :slightly_smiling_face: /me crosses fingers that I don't magically wipe things out :smile:

So the stack reference is read only. You're basically reading in the outputs from other stacks

Also, if you change the value of an output, the "reader" stack won't get the new value until you run pulumi up on that one