I spent the day using this to bring up a vpc and associated infrastructure on aws. I do like it. Is there a recommended get the outputs of one project and feed them into the inputs of another project? I want to define a route53 zone in a project called "site" that all the stacks of another project reference.

As @stocky-spoon-28903 noted, the current recommendation is to export these from the lower level, and then set them as

config

in the higher level project. This of course isn't quite as smooth as we'd like, and we have many ideas for how to improve here. In particular, we'd love to be able to have the higher level program directly reference exports of a stack, and enforce constraints on the lower level stack that these don't change without acknowledgement (or even cascading mututal deployments) from the higher level stack.