A later review needs more than the name of the model used. Preserve the agreement or campaign instruction, product data, relevant prompt, answer, visible disclosure and time of output together.
For dynamic systems, also record the model version, retrieval or data state, selection rules, target group and any A/B tests. Preserve the interface in which the answer appeared. A text export often does not show whether the notice was above, beside or only after the answer.
The records should use unambiguous versioning. When a notice, answer rule or product database changes, it must remain clear which version was visible before and which was delivered afterwards. This is important for internal approval and for responding to an objection.