diff --git a/scripts/src/hwlab-node-web-observe-runner-source.ts b/scripts/src/hwlab-node-web-observe-runner-source.ts
index df49ee49..b560b74a 100644
--- a/scripts/src/hwlab-node-web-observe-runner-source.ts
+++ b/scripts/src/hwlab-node-web-observe-runner-source.ts
@@ -3903,11 +3903,7 @@ function isFinalResultText(text) {
 }
 
 function buildSampleMetrics(samples, control) {
-  const promptCommands = control
-    .filter((item) => item.type === "sendPrompt" && item.phase === "completed")
-    .map((item) => ({ ts: item.ts, tsMs: Date.parse(item.ts), commandId: item.commandId ?? null, textHash: item.input?.textHash ?? null, textBytes: item.input?.textBytes ?? null }))
-    .filter((item) => Number.isFinite(item.tsMs))
-    .sort((a, b) => a.tsMs - b.tsMs);
+  const promptCommands = buildSendPromptCommandTimeline(control);
   const promptTimes = promptCommands.map((item) => item.tsMs);
   const timeline = samples.map((sample) => {
     const texts = sampleTexts(sample);
@@ -4070,6 +4066,49 @@ function buildSampleMetrics(samples, control) {
   };
 }
 
+function buildSendPromptCommandTimeline(control) {
+  const byCommand = new Map();
+  let ordinal = 0;
+  for (const item of Array.isArray(control) ? control : []) {
+    if (item?.type !== "sendPrompt") continue;
+    const commandId = item.commandId ? String(item.commandId) : "sendPrompt-" + String(ordinal++);
+    const existing = byCommand.get(commandId) || {
+      commandId,
+      startedAt: null,
+      startedTsMs: null,
+      completedAt: null,
+      completedTsMs: null,
+      failedAt: null,
+      failedTsMs: null,
+      textHash: null,
+      textBytes: null,
+    };
+    if (!existing.textHash && item.input?.textHash) existing.textHash = item.input.textHash;
+    if (!existing.textBytes && item.input?.textBytes) existing.textBytes = item.input.textBytes;
+    const tsMs = Date.parse(item.ts);
+    if (item.phase === "started" && Number.isFinite(tsMs)) {
+      existing.startedAt = item.ts ?? existing.startedAt;
+      existing.startedTsMs = tsMs;
+    } else if (item.phase === "completed" && Number.isFinite(tsMs)) {
+      existing.completedAt = item.ts ?? existing.completedAt;
+      existing.completedTsMs = tsMs;
+    } else if (item.phase === "failed" && Number.isFinite(tsMs)) {
+      existing.failedAt = item.ts ?? existing.failedAt;
+      existing.failedTsMs = tsMs;
+    }
+    byCommand.set(commandId, existing);
+  }
+  return Array.from(byCommand.values())
+    .map((item) => {
+      const tsMs = Number.isFinite(item.startedTsMs) ? item.startedTsMs : Number.isFinite(item.completedTsMs) ? item.completedTsMs : item.failedTsMs;
+      const ts = Number.isFinite(item.startedTsMs) ? item.startedAt : Number.isFinite(item.completedTsMs) ? item.completedAt : item.failedAt;
+      return { ...item, ts, tsMs };
+    })
+    .filter((item) => Number.isFinite(item.tsMs))
+    .sort((a, b) => a.tsMs - b.tsMs)
+    .map((item, index) => ({ ...item, promptIndex: index + 1 }));
+}
+
 function buildSessionRailTitleMetrics(samples, timeline) {
   const rows = [];
   const examplesByHash = new Map();
@@ -4384,7 +4423,10 @@ function buildTurnTimingTable(samples, timeline) {
     for (const rawMetric of rawMetrics) {
       const samplePromptIndex = Number(timelineItem.promptIndex ?? 0);
       const evidencePromptIndex = inferTurnMetricPromptIndex(rawMetric, samplePromptIndex, maxDomIndex);
-      if (evidencePromptIndex !== null && !promptAssignmentByKey.has(rawMetric.key)) promptAssignmentByKey.set(rawMetric.key, evidencePromptIndex);
+      if (evidencePromptIndex !== null) {
+        const existingPromptIndex = promptAssignmentByKey.get(rawMetric.key);
+        if (existingPromptIndex === undefined || evidencePromptIndex > existingPromptIndex) promptAssignmentByKey.set(rawMetric.key, evidencePromptIndex);
+      }
       const assignedPromptIndex = promptAssignmentByKey.get(rawMetric.key) ?? null;
       const metric = { ...rawMetric, promptIndex: assignedPromptIndex, samplePromptIndex };
       let column = registry.get(metric.key);
@@ -4411,7 +4453,7 @@ function buildTurnTimingTable(samples, timeline) {
       } else {
         column.lastSeq = sample.seq ?? null;
         column.lastTs = sample.ts ?? null;
-        if (!column.promptIndex && metric.promptIndex) column.promptIndex = metric.promptIndex;
+        if (metric.promptIndex && column.promptIndex !== metric.promptIndex) column.promptIndex = metric.promptIndex;
         column.lastPromptIndex = metric.promptIndex ?? column.lastPromptIndex ?? null;
         if (!column.traceId && metric.traceId) column.traceId = metric.traceId;
         if (!column.messageId && metric.messageId) column.messageId = metric.messageId;