Can someone help me with CI and AWS. I am a bit confused over how to deal with Roles/IAM/RBAC for setting up the infrastructure in such way that staging and dev branches are different from prod in terms of rights

You can use conditionals based off of your stack name

if (pulumi.getStack() == "prod") {
   ...
else {
   ...
}

But aren’t the access tokens coming from outside in a config?

You can have different configurations per stack

Ah nice