How LLM-authored templates and deterministic generators replace runtime guesswork in complicated cloud foundations. LLM is spreading into more and more areas of work, but there are several where it cannot produce content directly. These are bank regulatory filings, executed legal contracts, medical prescriptions, audit attestations, aerospace maintenance procedures, and so on. Such outputs must be reproducible from the same inputs and auditable to every value. The same requirements have to produce the same output, and any change in the output has to be explainable back to a change in the inputs. A public cloud landing zone belongs to this group. The same business requirements, regulatory obligations and architectural decisions have to produce the same configuration. A configuration that drifts because of sampling temperature is not acceptable, and a landing zone is not an exception. It is the foundation a regulated business runs on.…