Progressive-Delivery

• Fleet rollout

  Roll one version across a fleet of StageSets in ordered waves — canary a few tenants, soak, health-check, then widen, and halt the whole fleet on regression.

• Progressive delivery

  Gate a Flagger or Argo Rollouts promotion on a StageSet stage, and gate a StageSet stage on a Rollout.

• StageSet vs Argo Rollouts

  Different layers — staged multi-artifact delivery versus single-workload traffic shifting.