From what I see so far, this is a bit outside of Pulumi's core competency, which is more in-line with a Terraform replacement, and while it can do simple deployments to Kubernetes, complex metric gated Continuous Deployment wouldn't be the right fit. Is this fair?

We’ve looked at it superficially but don’t plan to use it for apps for now. Have you looked at Concourse? Some folks on my team are fans