No matter how you like to participate in developer communities, Pulumi wants to meet you there. If you want to meet other Pulumi users to share use-cases and best practices, contribute code or documentation, see us at an event, or just tell a story about something cool you did with Pulumi, you are part of our community.

Pulumi Community

What exactly are you looking for when you say “new project with an existing stack”?  In general that isn’t really possible - the stack is an instance of some existing project. But there is likely a way to accomplish what you are looking for if you can share more details. 

I just want to have multiple projects each with their own 'dev', 'prod', etc stacks

In other words, it doesn't necessarily need to be the same stack, I just want to have the same name

Are you using the local backend?  I believe you are hitting <https://github.com/pulumi/pulumi/issues/2522> which causes stack names to be a shared namespace across different projects when using the local backend whereas stack names are project-scoped in the Pulumi service backend. This is definitively something we want to fix as it leads to problems like you are seeing here. Mind upvoting that issue and/or adding details of your use case?

FWIW - a workaround many folks use in practice is to use `&lt;project&gt;-&lt;stack&gt;` as the stack name.

Ahh okay, that makes sense. Yes, I've been using the local backend, as well as a GCS bucket.