Four objects: DeliveryPipeline, Target, Release, Rollout.

Skaffold renders and applies underneath all four — the same plan/apply split as Terraform, one layer up.

DeliveryPipelineThe ordered env sequence

TargetOne environment's rules

ReleaseOne immutable snapshot

RolloutOne deploy attempt

Each Target reaches into a SEPARATE environment project via its own gke.cluster field — the same tooling-project-deploys-across-boundaries pattern from Ch 1, now a real Cloud Deploy object.