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&gt;  i.e. dev.infra.happy-service and prod.infra.happy-service are two separate stacks on the same project
Thanks for you reply.
I have two projects for dev and prod and I don’t want to manage into one project.

I use Typescript and there will be too many

```if (pulumi.getStack() === "dev") {
    dev configuration
}```
Am I doing it correctly?

<@U01U2T0D0E8> You don’t need to check the stack, that happens automatically when using `Config()` in your code. See:
<https://www.pulumi.com/docs/intro/concepts/config/>
So for a given project, if you have a “dev” and a “prod” stack, you’ll have a `Pulumi.dev.yaml` and a `Pulumi.prod.yaml` that captures the configurations for the two different stacks.
Then in your code when  you access `pulumi.Config()` it will use the stack config that matches the stack you are doing the `pulumi up` for.

But let’s say, I only have a lambda in dev. 

i need to check the stack and define my resource in my typescript code, right?

So for a given project, are you saying that when you deploy the "prod" stack, you want to deploy, say, a lambda and a dynamoDb, but when you deploy the "dev" stack you only want to deploy a lambda?