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A pattern we like to use is "base/shared infrastructure" and "Stack References". Your base stack with shared resources is responsible for those resources and exports outputs for other "child" stacks to reference. This works with configuration as well. https://www.pulumi.com/docs/guides/organizing-projects-stacks/#using-stack-references-with-micro-stacks

Hi Harry, What @millions-furniture-75402 wrote! I don't want to open the Monorepo vs Multi Repo discussion but could be something to discuss inside your organisation. What also helps is the usage of Project level configuration to share for the different stacks.

thanks, @millions-furniture-75402 and @many-telephone-49025 I'll explore them 🙂