design: clean-room parity slice 1 — subtraction + honest landing stats

docs/design/ROOM_PARITY_GAP.md

@@ -28,8 +28,8 @@ memory demo room, first-visit state).
 |---|---|---|---|
 | 1 | Per-sheet header: title + filter + `DATAFRAME vNN` chip + `Room trace · N` + `Entity graph` on the artifact itself | REFINE | Version/kicker data already computed (Artifact.tsx `sheetKicker`, `dataframeMeta`); today it renders in the FOOTER as an all-caps kicker. Promote to header, quiet mono chip. |
 | 2 | Footer consolidation: `N rows · double-click a cell to edit` + `N of N cols` only | REFINE | Undo stays (reference omits it but recoverability beats parity — B7). Kicker moves up (slice 1). |
-| 3 | Demo seed shows the POPULATED moment: variance chips (+24% …) + notes filled, like the landing loop's end state | REFINE | The reference sells the ledger full. Check e2e/state-capture deps on empty variance cells first. |
-| 4 | Variance/computed cells as semantic chips (green = reconciled+sourced success state) | REFINE | Matches landing loop's committed-value styling; green stays success-only. |
+| 3 | Demo seed shows the POPULATED moment: variance chips (+24% …) + notes filled | REJECT (amended 2026-07-17) | The empty→filled arc IS the demo: the seed empties variance cells (engine/demoRoom.ts:230) so the agent reconciles them LIVE on request. Pre-filling kills the product's hero moment. `state-captures.spec.ts:148` pins the "+ add" affordance. |
+| 4 | Variance/computed cells as green chips | REJECT as-drawn (amended 2026-07-17) | Existing taste ruling in `state-captures.spec.ts:148`: values use "neutral/sign-aware color, not all-green" — a green +27.5% on COGS would mark a cost increase as success. The mockup loses to semantics. |
 | 5 | Binder: hierarchical categories with counts (Sheets > Financials 2 …, Docs, Notebooks, Uploads) + inline meta on pinned rows (`Sheet · v42 · agent`) | REFINE | Current: flat Pinned/Recent/Room-sheets. Needs artifact taxonomy from store; medium. |
 | 6 | Tab strip: fold overflow into `+3 ∨` dropdown; move Export XLSX / Shared to a quieter right cluster | REFINE | Current `+3` chip exists but row still crowds. |
 | 7 | Chat: accepted-patch EVENT LINES (`✓ Homen accepted the patch v42 → v43 · 2 cells · sourced`) + pinned-cell chips in messages | REFINE | Receipt cards + version chips already exist; event lines and cell-pin chips are missing. |

src/app/styles.css

@@ -1161,6 +1161,8 @@ button.r-offline-pill:hover, button.r-offline-pill:focus-visible { border-color:
    version pill, chromeless column count. .r-vpill.next keeps its accent — it is a pending-commit
    semantic, not decoration. */
 .r-sheet-foot { padding: 10px 14px; border-top: 1px solid color-mix(in srgb, var(--line) 55%, transparent); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
+/* The engine badge is provenance, not a headline — quiet mono, no uppercase shout. */
+.r-dataframe-badge .kicker { text-transform: none; letter-spacing: 0; font-family: var(--font-mono); font-weight: 600; font-size: 10px; }
 .r-vpill { font-family: var(--font-mono); font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 6px; background: transparent; border: 1px solid var(--line); color: var(--text-muted); }
 .r-vpill.next { background: var(--accent-tint); border-color: var(--accent-border); color: var(--accent-ink); }
 .r-cols-pill { display: inline-flex; align-items: center; min-height: 22px; padding: 0 7px; border: 1px solid transparent; border-radius: 6px; background: transparent; color: var(--text-muted); font-family: var(--font-mono); font-size: 10.5px; font-weight: 800; white-space: nowrap; }

src/ui/Landing.tsx

@@ -535,7 +535,14 @@ function ProofPillView({ rooms, cells, demo }: { rooms?: LandingMetric; cells?:
 /** Mounted ONLY in live mode — memory mode has no ConvexProvider and useQuery would throw. */
 function LiveProofPill() {
   const metrics = useQuery(landingMetricsQuery, {});
-  return <ProofPillView rooms={metrics?.roomsLive} cells={metrics?.cellsCommittedToday} demo={false} />;
+  // No placeholder ghosts (em-dashes read as a broken page), and no zero-bragging:
+  // a social-proof strip with nothing to prove should not render at all. Verified
+  // against prod: metrics:landingMetrics currently returns { roomsLive: 0, ... }.
+  const rooms = metrics?.roomsLive;
+  const cells = metrics?.cellsCommittedToday;
+  if (!rooms || !cells) return null;
+  if (rooms.value === 0 && cells.value === 0) return null;
+  return <ProofPillView rooms={rooms} cells={cells} demo={false} />;
 }
 
 function LandingProofPill({ live }: { live: boolean }) {

src/ui/panels/Artifact.tsx

@@ -2131,7 +2131,7 @@ export function GenericSheet({ roomId, me, art, proof, onError }: { roomId: stri
   const selectedRowId = selected.rowId;
   const selectedColId = selected.colId;
   const dataframeMeta = art.meta?.dataframe;
-  const sheetKicker = dataframeMeta?.sourceFile === "blank-room" || dataframeMeta?.sourceFile === "blank-room-agent" ? "versionedSpreadsheetSync" : art.meta?.upload ? "uploadedSpreadsheet" : "dataframe";
+  const sheetKicker = dataframeMeta?.sourceFile === "blank-room" || dataframeMeta?.sourceFile === "blank-room-agent" ? "versionedSync" : art.meta?.upload ? "uploaded" : "dataframe";
   const columnCountLabel = cols.length < columns.length ? `${cols.length} of ${columns.length} cols` : `${cols.length} cols`;
   const columnCountTitle = cols.length < columns.length ? `${columns.length - cols.length} hidden columns available from the column menu` : "All columns visible";
   const footerColumnLabel = `${columns.length} columns`;
@@ -2901,7 +2901,7 @@ function Sheet({ roomId, me, art, proof, onError }: { roomId: string; me: Actor;
         <span className="r-dataframe-badge">
           <Package size={12} aria-hidden="true" />
           <span>
-            <span className="kicker">versionedSpreadsheetSync</span>
+            <span className="kicker">versionedSync</span>
             <span className="r-vpill next">v{art.version}</span>
           </span>
         </span>