Panel rebuilt as the heat matrix: verdict header (ring + newest fault named with its age, cable cell top right), one row per check with NOW / last-90s-at-5s-a-cell / since-reset columns, noise as a blue context lane; history.go keeps the 18-slot wall-time ring (per-class fault deltas, SNR minima, rate verdicts, measuring gray) plus since-reset aggregates and fault ages that clear on reset; noise cycle grid-locked to the shared slot clock so cells never straddle a phase and flicker, presence granted at boot until the first up-phase verdict; check/cross stroked as capsule marks (font has neither), line rate is a pure verdict everywhere, footer is a three-line stat stack beside hold-to-reset; old panel/chip/stat-grid machinery deleted; mockups/ gitignored

main.go

@@ -341,9 +341,9 @@ func (d *direction) counters(now counterSet) view {
 
 // Nothing to hold or revert here: failures during a measure were never
 // counted, so the view is always the counters as they stand.
-func phyView(diag *cableDiag, modules []*phyModule) phyDisplay {
+func phyView(diag *cableDiag, modules []*phyModule) (phyDisplay, bool) {
 	info, measuring := diag.snapshot()
-	return phyDisplayFrom(info, measuring, modules[0].view(), modules[1].view())
+	return phyDisplayFrom(info, measuring, modules[0].view(), modules[1].view()), measuring
 }
 
 func totalView(views []view) view {
@@ -773,12 +773,16 @@ func run(aName, bName string) (err error) {
 	}
 
 	start := time.Now()
+	// Anchored to the same clock as the noise cycle, so slot boundaries and
+	// phase transitions coincide.
+	hist := newHistory(rateEpochStart)
 	// A reset resets at the press, then re-measures; the measure's failures
 	// are suppressed at their sources while it runs, so there is nothing to
 	// hide or revert afterwards.
 	kickMeasure := func() {
 		if diag.kick(&done) {
 			start = resetAll(dirs, modules)
+			hist.reset()
 		}
 	}
 	close(startTx)
@@ -811,9 +815,10 @@ func run(aName, bName string) (err error) {
 			for i, d := range dirs {
 				views[i] = d.displayView()
 			}
-			v, phy := totalView(views), phyView(diag, modules)
-			if err := disp.render(v, now.Sub(start), phy,
-				noise.view()); err != nil {
+			v := totalView(views)
+			phy, measuring := phyView(diag, modules)
+			if err := disp.render(v, now.Sub(start), phy, measuring,
+				noise.view(), hist.view(), target); err != nil {
 				return err
 			}
 		case now := <-tick.C:
@@ -821,7 +826,9 @@ func run(aName, bName string) (err error) {
 			for i, d := range dirs {
 				rows[i] = d.displayView()
 			}
-			v, phy := totalView(rows), phyView(diag, modules)
+			v := totalView(rows)
+			phy, measuring := phyView(diag, modules)
+			hist.sample(now, v, phy, noise.view(), measuring, target)
 			for _, m := range modules {
 				for _, n := range m.takeNotes() {
 					fmt.Println(stats.rule(n))