diff --git a/scripts/src/hwlab-node-web-observe-runner-source.ts b/scripts/src/hwlab-node-web-observe-runner-source.ts
index 35b9cccc..a3881025 100644
--- a/scripts/src/hwlab-node-web-observe-runner-source.ts
+++ b/scripts/src/hwlab-node-web-observe-runner-source.ts
@@ -1260,10 +1260,12 @@ function buildSampleMetrics(samples, control) {
   const turnTiming = buildTurnTimingTable(samples, timeline);
   const turnCells = turnTiming.rows.flatMap((row) => Object.values(row.cells || {}));
   const turnTimingNonMonotonic = Array.isArray(turnTiming.nonMonotonic) ? turnTiming.nonMonotonic : [];
+  const turnTimingRecentUpdateResets = Array.isArray(turnTiming.recentUpdateResets) ? turnTiming.recentUpdateResets : [];
   const withTotal = timeline.filter((item) => item.totalElapsedSeconds !== null).length;
   const withRecent = timeline.filter((item) => item.recentUpdateSeconds !== null).length;
   const diagnostics = timeline.filter((item) => item.diagnosticSeen).length;
   const rounds = buildRoundMetricSummaries(timeline, promptCommands);
+  const recentUpdateJumpCount = turnTimingNonMonotonic.filter((item) => item.metric === "recentUpdateSeconds" && item.anomaly === "jump").length;
   return {
     summary: {
       sampleCount: timeline.length,
@@ -1278,12 +1280,15 @@ function buildSampleMetrics(samples, control) {
       turnCellsWithRecentUpdate: turnCells.filter((item) => item.recentUpdateSeconds !== null).length,
       turnTimingNonMonotonicCount: turnTimingNonMonotonic.length,
       turnTimingTotalElapsedDecreaseCount: turnTimingNonMonotonic.filter((item) => item.metric === "totalElapsedSeconds").length,
-      turnTimingRecentUpdateDecreaseCount: turnTimingNonMonotonic.filter((item) => item.metric === "recentUpdateSeconds").length
+      turnTimingRecentUpdateJumpCount: recentUpdateJumpCount,
+      turnTimingRecentUpdateResetCount: turnTimingRecentUpdateResets.length,
+      turnTimingRecentUpdateDecreaseCount: turnTimingRecentUpdateResets.length
     },
     rounds,
     turnColumns: turnTiming.columns,
     turnTimingTable: turnTiming.rows,
     turnTimingNonMonotonic,
+    turnTimingRecentUpdateResets,
     timeline
   };
 }
@@ -1343,11 +1348,18 @@ function buildTurnTimingTable(samples, timeline) {
       cells
     });
   }
-  return { columns, rows, nonMonotonic: detectTurnTimingNonMonotonic(columns, rows) };
+  const timingEvents = detectTurnTimingNonMonotonic(columns, rows);
+  return {
+    columns,
+    rows,
+    nonMonotonic: timingEvents.anomalies,
+    recentUpdateResets: timingEvents.recentUpdateResets
+  };
 }
 
 function detectTurnTimingNonMonotonic(columns, rows) {
-  const events = [];
+  const anomalies = [];
+  const recentUpdateResets = [];
   for (const column of columns) {
     const previousByMetric = new Map();
     for (const row of rows) {
@@ -1358,11 +1370,12 @@ function detectTurnTimingNonMonotonic(columns, rows) {
         if (value === null || value === undefined || !Number.isFinite(Number(value))) continue;
         const current = Number(value);
         const previous = previousByMetric.get(metric);
-        if (previous && current < previous.value) {
-          events.push({
+        if (previous && metric === "totalElapsedSeconds" && current < previous.value) {
+          anomalies.push({
             columnId: column.id,
             columnLabel: column.label,
             metric,
+            anomaly: "decrease",
             fromSeq: previous.seq,
             fromTs: previous.ts,
             fromValue: previous.value,
@@ -1380,10 +1393,31 @@ function detectTurnTimingNonMonotonic(columns, rows) {
         if (previous && metric === "recentUpdateSeconds") {
           const elapsedMs = Date.parse(String(row.ts ?? "")) - Date.parse(String(previous.ts ?? ""));
           const elapsedSeconds = Number.isFinite(elapsedMs) && elapsedMs >= 0 ? elapsedMs / 1000 : null;
-          const allowedIncrease = elapsedSeconds === null ? 10 : Math.max(10, elapsedSeconds + 5);
           const increase = current - previous.value;
+          if (increase < 0) {
+            recentUpdateResets.push({
+              columnId: column.id,
+              columnLabel: column.label,
+              metric: "recentUpdateSeconds",
+              event: "reset",
+              fromSeq: previous.seq,
+              fromTs: previous.ts,
+              fromValue: previous.value,
+              toSeq: row.seq ?? null,
+              toTs: row.ts ?? null,
+              toValue: current,
+              delta: increase,
+              sampleDeltaSeconds: elapsedSeconds,
+              traceId: cell.traceId ?? column.traceId ?? null,
+              messageId: cell.messageId ?? column.messageId ?? null,
+              promptIndex: cell.promptIndex ?? row.promptIndex ?? null,
+              source: cell.source ?? column.source ?? null,
+              valuesRedacted: true
+            });
+          }
+          const allowedIncrease = elapsedSeconds === null ? 10 : Math.max(10, elapsedSeconds + 5);
           if (increase > allowedIncrease) {
-            events.push({
+            anomalies.push({
               columnId: column.id,
               columnLabel: column.label,
               metric: "recentUpdateSeconds",
@@ -1409,7 +1443,7 @@ function detectTurnTimingNonMonotonic(columns, rows) {
       }
     }
   }
-  return events;
+  return { anomalies, recentUpdateResets };
 }
 
 function turnMetricItems(sample, timelineItem) {
@@ -1686,8 +1720,12 @@ function renderTurnTimingTable(sampleMetrics) {
   const nonMonotonic = Array.isArray(sampleMetrics?.turnTimingNonMonotonic) ? sampleMetrics.turnTimingNonMonotonic : [];
   const nonMonotonicLines = nonMonotonic.length > 0
     ? nonMonotonic.slice(0, 80).map((item) => "- " + (item.columnLabel || item.columnId || "-") + " " + item.metric + (item.anomaly ? " " + item.anomaly : "") + " " + (item.fromValue ?? "-") + " -> " + (item.toValue ?? "-") + " delta=" + (item.delta ?? "-") + " sampleDelta=" + (item.sampleDeltaSeconds ?? "-") + " allowed=" + (item.allowedIncreaseSeconds ?? "-") + " seq " + (item.fromSeq ?? "-") + " -> " + (item.toSeq ?? "-") + " ts " + (item.fromTs || "-") + " -> " + (item.toTs || "-") + " traceId=" + (item.traceId || "-")).join("\n")
-    : "- 未观察到数值下降事件。";
-  return lines.join("\n") + "\n\n列说明：\n" + columnLines + "\n\n非单调/跳增事件（仅报表暴露，不做下游 repair）：\n" + nonMonotonicLines;
+    : "- 未观察到总耗时下降或最近更新异常跳增。";
+  const recentUpdateResets = Array.isArray(sampleMetrics?.turnTimingRecentUpdateResets) ? sampleMetrics.turnTimingRecentUpdateResets : [];
+  const resetLines = recentUpdateResets.length > 0
+    ? recentUpdateResets.slice(0, 80).map((item) => "- " + (item.columnLabel || item.columnId || "-") + " reset " + (item.fromValue ?? "-") + " -> " + (item.toValue ?? "-") + " delta=" + (item.delta ?? "-") + " sampleDelta=" + (item.sampleDeltaSeconds ?? "-") + " seq " + (item.fromSeq ?? "-") + " -> " + (item.toSeq ?? "-") + " ts " + (item.fromTs || "-") + " -> " + (item.toTs || "-") + " traceId=" + (item.traceId || "-")).join("\n")
+    : "- 未观察到最近更新归零/回落。";
+  return lines.join("\n") + "\n\n列说明：\n" + columnLines + "\n\n异常事件（仅报表暴露，不做下游 repair）：\n" + nonMonotonicLines + "\n\n最近更新 reset 事件（预期三角波归零，不计为异常）：\n" + resetLines;
 }
 
 function formatMetricCell(value) {
@@ -1745,6 +1783,12 @@ function renderMarkdown(report) {
     + "- withRecentUpdate: " + (metricSummary.withRecentUpdate ?? 0) + "\n"
     + "- diagnostics: " + (metricSummary.diagnostics ?? 0) + "\n"
     + "- promptSegments: " + (metricSummary.promptSegments ?? 0) + "\n\n"
+    + "- turnColumns: " + (metricSummary.turnColumns ?? 0) + "\n"
+    + "- turnTimingRows: " + (metricSummary.turnTimingRows ?? 0) + "\n"
+    + "- turnTimingNonMonotonicCount: " + (metricSummary.turnTimingNonMonotonicCount ?? 0) + "\n"
+    + "- turnTimingTotalElapsedDecreaseCount: " + (metricSummary.turnTimingTotalElapsedDecreaseCount ?? 0) + "\n"
+    + "- turnTimingRecentUpdateJumpCount: " + (metricSummary.turnTimingRecentUpdateJumpCount ?? 0) + "\n"
+    + "- turnTimingRecentUpdateResetCount: " + (metricSummary.turnTimingRecentUpdateResetCount ?? 0) + "\n\n"
     + "### Rounds\n\n" + roundLines + "\n\n"
     + "### Prompt network\n\n" + promptNetworkLines + "\n\n"
     + "### Runtime alerts\n\n"