What is the role of the ABAP Cloud programming model in enforcing Clean Core?

ABAP Cloud is a restricted, curated subset of the ABAP language and its available objects — when developing under the ABAP Cloud model, the compiler itself only permits using released APIs and released CDS Views, structurally preventing a developer from accidentally (or deliberately) reaching into unreleased core internals, rather than relying purely on governance policy or code review to catch violations after the fact.

flowchart LR
    A[Developer writes ABAP Cloud code] --> B{Compiler checks: released objects only?}
    B -->|Violates restriction| C[Compile-time error]
    B -->|Uses only released APIs| D[Compiles successfully]

This is a significant shift from relying solely on architectural guidelines and manual review: Clean Core compliance becomes something the language and tooling enforce structurally, which is a much stronger guarantee than a policy document that developers might not always follow under project deadline pressure.