AI Governance & Assurance · live demo

The spreadsheet retires only when the replacement proves it, cell by cell.

Critical close calculations live in unmanaged Excel with no version control and one departed owner who understood the formulas. Retirement projects stall because nobody can prove the replacement produces the same numbers. This demo draws the trust boundary the way I believe every EUC remediation should: a risk register scored in code from parsed workbook structure with fixed, visible weights, a deterministic differ that recomputes every cell of the governed micro-app against the spreadsheet's stored values, and a cutover gate that is a boolean over max absolute difference at a tolerance shown on screen. The model only quotes cells and drafts the memo, and a named finance owner dispositions every non-zero difference before the lever unlocks. Public dataset: Enron spreadsheets corpus (CC BY 4.0) + one synthetic close workbook · runs in your browser