What must be visible if a decision is challenged.
A witness, in SnapOS terms, is not a person who testifies. It is a structural reference point in a review record — the thing that must be visible later, if a decision is ever questioned. This page explains what needs to be visible, not how the private engine evaluates it.
If a decision cannot show where it came from, what it was based on, who could approve it, and when it was still valid, it cannot be meaningfully reviewed later — no matter how well it performed at the time.
Source
Where the claim or object came from.
Object
Which document, workflow or artefact was actually reviewed.
Evidence
What documented support exists for the claim, and where that support stops.
Authority
Who was documented as entitled to approve, review or override this specific decision.
Temporal validity
At what date, version or snapshot the finding is valid.
Reviewer
Who produced or reviewed the output, and under what status.
These are output requirements — what a reviewable finding must contain — not a description of the internal logic used to assess them. That logic remains part of the protected audit engine.
View the Conformance Suite → — the complete output schema and result labels.