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How do you use sync waves on child applications for ordered platform bootstrap?

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Answer

Annotate child Application resources with sync waves so the parent creates foundational apps first (CRDs, ingress, cert-manager in low waves) before dependent workloads (higher waves). This ensures the platform layer is Healthy before apps that rely on it are created.
# child app
metadata:
  annotations:
    argocd.argoproj.io/sync-wave: "0"   # platform before wave 1 apps
Real-world example cert-manager and ingress (wave 0) become Healthy before the workloads (wave 1) that need TLS and routing.

Common follow-ups: What ordering do waves give across children? | Why bootstrap platform first?

Sync Waves & Hooks Multi-cluster App of Apps
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