@salmon-account-74572 I tried that, perhaps I'm missing something simple. So this value

aws_account_id

is different for each stack hence its original location in the stack files i.e.

Pulumi.develop.yaml

,

Pulumi.staging.yaml

etc. I tried to implement your suggestion by adding a couple of lines under

config:

at the top of

Pulumi.yaml

like so:

config:
...
  aws_account_id:
    type: string

Then I printed the output like so:

outputs:
  # Debug printouts
  accIDString: "${aws_account_id}"

And it's still getting converted.

Outputs:
  + accIDString               : 2.809102044e+10

I also tried a slightly different way, but this just printed the variable name

config:
  awsAccountID: 
    type: string
    default: ${aws_account_id}
...
outputs:
  # Debug printouts
  accIDString: "${awsAccountID}"
~~~~~~~~
Outputs:
  + accIDString               : "${aws_account_id}"