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How do you give teams ownership of their own child apps safely? How do you observe the health of all child apps at once? What are the risks of App of Apps and how do you mitigate them? How do you combine App of Apps with ApplicationSets? How do you prevent accidental deletion of all child apps? When should you migrate from App of Apps to ApplicationSets? How do you use sync waves on child applications for ordered platform bootstrap? How do you handle per-environment differences in an App of Apps model? What are alternatives to App of Apps for managing many apps? How does App of Apps support multi-cluster bootstrapping?
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ArgoCD › App of Apps

How do you manage environment promotion using App of Apps?

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Answer

Structure per-environment roots (dev/staging/prod), each pointing at env-specific child app configs pinned to revisions/tags. Promotion is a PR that updates the target env's config (e.g., bump the image tag or child app revision), which the env's root syncs. This keeps promotion auditable and environment-scoped.
Real-world example Promoting a release is a PR bumping the tag in the prod root's child configs, which prod's ArgoCD then rolls out.

Common follow-ups: How is promotion made auditable? | Why separate roots per environment?

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