Complete procedures with a way back.

Create an owned prompt registry that safely references OpenAI reusable prompts from the Responses API, validates typed variables, pins platform versions, proves consumer compatibility, evaluates candidates, and supports controlled promotion and complete rollback.

Design, deploy and prove an Amazon S3 backup target with explicit object ownership, public-access blocking, SSE-KMS, version history, lifecycle controls, least-privilege roles, optional immutable retention and independent restore evidence.