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I wonder if there is a concept of a Pulumi context, where you can say every resource created in this function should use provider=X and add suffix=Y to every name

There isn't such a concept, it is entirely up to you. I built a "init" function that runs several checks when new stack is created and one of them to make sure that default providers are disabled https://www.pulumi.com/blog/disable-default-providers/ Then when building component resources I pass the base name and use the function to build the name from that. (There is a catch... some resource names can get too long) Also instead of using

ResourceOptions.provider

passed to Component Resource. The interface is more explicit about what provider/s should be passed in.

That’s a good point - perhaps I can create a bound

createResource

function (contains region + name suffix) and use that when creating the stack eg.

const builder = new Builder({
  provider: new AWS.Provider('X', { region: 'X' }),
  nameSuffix: 'X',
})
builder.createResource(aws.lambda.Function, { ... } )

One of the good examples is ACM certificates ... for Cloudfront you need UE-1 and regional for ALB ... I wish ACM was finally a global service...