Who certifies: you, and what we prepare

Reflow prepares and documents. You certify. That split is not a disclaimer, it is how the product is built: the certify step refuses to run until every image in the book has a human decision on it, and it refuses to run without a typed certifier name.

What you can show if a claim is challenged

• The audit trail: every machine action and every human decision, with timestamps, in order, exportable as CSV or JSON.
• The validator output before and after, from EPUBCheck 5.3.0 and Ace by DAISY 1.4.6.
• The draft and the final wording for every description, so an edit is visible as an edit.
• The named person who certified, and the date, written inside the file itself.

That evidence is the deliverable procurement actually wants. A claim without it is a sentence; a claim with it is a record.