A captured input→visible-change responds-proof (feature 090, FR-006/FR-007): the `Before` frame, the `After` frame produced by applying a real dispatched interaction (route → `host.Update` fold → re-render, exactly as the live repaint loop), and the `Verdict`. A distinct evidence class from a render-only screenshot (one frame, no interaction) and from the offscreen `runInteractivePointerOnce` route probe (model layer only): an app that renders but does not respond yields identical frames and an `Inert` verdict, so "renders" cannot be passed off as "responds".