Networking already owns a CloudFormation stack that exports subnet and security-group IDs. The ML stack must consume those exports so the new endpoint lands in the existing VPC without copying IDs into chat. What should they automate?
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Short Explanation
Networking already exports subnet and security-group IDs. Consume those exports so the endpoint lands in the existing VPC. A new VPC is Domain 4, and pasting IDs into chat is the drift they refused.
Full Explanation
Automate provisioning with cross-stack references so the ML stack imports networking exports. Do not design a new VPC (Domain 4 isolation). Polly is not a stack export, and pasting IDs into chat is the drift they refused.