fix(web-probe): scope turn timing by page epoch (#803)

Co-authored-by: Codex <codex@noreply.local>

scripts/src/hwlab-node-impl.ts

@@ -8547,7 +8547,7 @@ function runNodeWebProbeObserveAnalyze(options: NodeWebProbeObserveOptions, spec
     "const fullSource = reportJson || source;",
     "const objectOrNull = (value) => value && typeof value === 'object' && !Array.isArray(value) ? value : null;",
     "const slimRound = (item) => { const v = objectOrNull(item) || {}; return { promptIndex: v.promptIndex ?? null, sampleCount: v.sampleCount ?? null, loadingSamples: v.loadingSamples ?? null, maxLoadingCount: v.maxLoadingCount ?? null, loadingOwnerCount: v.loadingOwnerCount ?? null, lastTotalElapsedSeconds: v.lastTotalElapsedSeconds ?? null, lastRecentUpdateSeconds: v.lastRecentUpdateSeconds ?? null, diagnosticSamples: v.diagnosticSamples ?? null, terminalSamples: v.terminalSamples ?? null, turnTimingTotalElapsedForwardJumpCount: v.turnTimingTotalElapsedForwardJumpCount ?? null, turnTimingTotalElapsedForwardJumpMaxSeconds: v.turnTimingTotalElapsedForwardJumpMaxSeconds ?? null, promptTextHash: clip(v.promptTextHash, 80) }; };",
-    "const slimTurnColumn = (item) => { const v = objectOrNull(item) || {}; return { label: clip(v.label, 24), pageRole: clip(v.pageRole, 24), pageId: clip(v.pageId, 32), promptIndex: v.promptIndex ?? null, lastPromptIndex: v.lastPromptIndex ?? null, traceId: clip(v.traceId, 48), firstSeq: v.firstSeq ?? null, lastSeq: v.lastSeq ?? null, source: clip(v.source, 48) }; };",
+    "const slimTurnColumn = (item) => { const v = objectOrNull(item) || {}; return { label: clip(v.label, 24), pageRole: clip(v.pageRole, 24), pageId: clip(v.pageId, 32), pageEpoch: v.pageEpoch ?? null, promptIndex: v.promptIndex ?? null, lastPromptIndex: v.lastPromptIndex ?? null, traceId: clip(v.traceId, 48), firstSeq: v.firstSeq ?? null, lastSeq: v.lastSeq ?? null, source: clip(v.source, 48) }; };",
     "const slimSlowSample = (item) => { const v = objectOrNull(item) || {}; return { ts: v.ts ?? null, seq: v.seq ?? null, path: clip(v.path ?? v.rawPath, 96), initiatorType: clip(v.initiatorType, 24), durationMs: v.durationMs ?? null, requestToResponseStartMs: v.requestToResponseStartMs ?? v.streamOpenMs ?? null, responseTransferMs: v.responseTransferMs ?? null, nextHopProtocol: clip(v.nextHopProtocol, 24), timingStatus: clip(v.timingStatus, 16), serverTimingNames: Array.isArray(v.serverTimingNames) ? v.serverTimingNames.slice(0, 4).map((x) => clip(x, 32)) : [], otelTraceId: clip(v.otelTraceId, 32) }; };",
     "const slimSlowApi = (item) => { const v = objectOrNull(item) || {}; return { path: clip(v.path ?? v.route, 96), route: clip(v.route ?? v.path, 96), sampleCount: v.sampleCount ?? null, p95Ms: v.p95Ms ?? v.p95 ?? null, maxMs: v.maxMs ?? v.max ?? null, budgetMs: v.budgetMs ?? null, overBudgetCount: v.overBudgetCount ?? null, overFiveSecondCount: v.overFiveSecondCount ?? null, slowSamples: Array.isArray(v.slowSamples) ? v.slowSamples.slice(0, 3).map(slimSlowSample) : [] }; };",
     "const slimFinding = (item) => { const v = objectOrNull(item) || {}; return { kind: clip(v.kind ?? v.id ?? v.code, 48), code: clip(v.code ?? v.id ?? v.kind, 48), severity: clip(v.severity ?? v.level, 24), level: clip(v.level ?? v.severity, 24), count: v.count ?? v.sampleCount ?? null, sampleCount: v.sampleCount ?? v.count ?? null, summary: clip(v.summary ?? v.message, 180), message: clip(v.message ?? v.summary, 180) }; };",
@@ -8559,7 +8559,7 @@ function runNodeWebProbeObserveAnalyze(options: NodeWebProbeObserveOptions, spec
     "const slimRunnerError = (item) => { const v = objectOrNull(item) || {}; const readiness = objectOrNull(v.lastReadiness); return { ts: v.ts ?? null, type: clip(v.type, 32), commandId: clip(v.commandId, 80), sampleSeq: v.sampleSeq ?? null, message: clip(v.message, 240), retry: clip(v.retry, 24), retryExhausted: v.retryExhausted === true, lastError: clip(v.lastError, 180), attemptCount: v.attemptCount ?? null, lastFailureKind: clip(v.lastFailureKind, 48), lastReadinessReason: clip(v.lastReadinessReason, 48), lastReadiness: readiness ? { reason: clip(readiness.reason, 48), path: clip(readiness.path, 96), readyState: clip(readiness.readyState, 24), workbenchShellVisible: readiness.workbenchShellVisible === true, sessionCreateVisible: readiness.sessionCreateVisible === true, commandInputPresent: readiness.commandInputPresent === true, activeTabPresent: readiness.activeTabPresent === true, warningPresent: readiness.warningPresent === true, loginVisible: readiness.loginVisible === true, bodyTextHash: clip(readiness.bodyTextHash, 80) } : null }; };",
     "const slimRunnerErrorFromJsonl = (item) => { const v = objectOrNull(item) || {}; const error = objectOrNull(v.error) || {}; const attempts = Array.isArray(error.attempts) ? error.attempts : []; const lastAttempt = attempts.length > 0 ? objectOrNull(attempts[attempts.length - 1]) || {} : {}; const rawReadiness = objectOrNull(lastAttempt.readiness) || objectOrNull(error.navigationReadiness); const readiness = objectOrNull(rawReadiness?.snapshot) || rawReadiness; return { ts: v.ts ?? null, type: v.type ?? null, commandId: v.commandId ?? null, sampleSeq: v.sampleSeq ?? null, message: error.message ?? v.message ?? null, attemptCount: attempts.length, lastFailureKind: lastAttempt.failureKind ?? null, lastReadinessReason: rawReadiness?.reason ?? readiness?.reason ?? null, lastReadiness: readiness ?? null }; };",
     "const slimCommandFailure = (item) => { const v = objectOrNull(item) || {}; return { ts: v.ts ?? null, commandId: clip(v.commandId, 80), type: clip(v.type, 32), source: clip(v.source, 24), durationMs: v.durationMs ?? null, beforePath: clip(v.beforePath, 80), afterPath: clip(v.afterPath, 80), name: clip(v.name, 48), failureKind: clip(v.failureKind, 48), sampleSeq: v.sampleSeq ?? null, failureSampleOk: v.failureSampleOk === true, message: clip(v.message, 240) }; };",
-    "const slimJump = (item) => { const v = objectOrNull(item) || {}; return { columnLabel: v.columnLabel ?? null, pageRole: clip(v.pageRole, 24), pageId: clip(v.pageId, 32), promptIndex: v.promptIndex ?? null, fromSeq: v.fromSeq ?? null, toSeq: v.toSeq ?? null, fromValue: v.fromValue ?? null, toValue: v.toValue ?? null, delta: v.delta ?? null, sampleDeltaSeconds: v.sampleDeltaSeconds ?? null, allowedIncreaseSeconds: v.allowedIncreaseSeconds ?? null, traceId: v.traceId ?? null }; };",
+    "const slimJump = (item) => { const v = objectOrNull(item) || {}; return { columnLabel: v.columnLabel ?? null, pageRole: clip(v.pageRole, 24), pageId: clip(v.pageId, 32), pageEpoch: v.pageEpoch ?? null, promptIndex: v.promptIndex ?? null, fromSeq: v.fromSeq ?? null, toSeq: v.toSeq ?? null, fromValue: v.fromValue ?? null, toValue: v.toValue ?? null, delta: v.delta ?? null, sampleDeltaSeconds: v.sampleDeltaSeconds ?? null, allowedIncreaseSeconds: v.allowedIncreaseSeconds ?? null, traceId: v.traceId ?? null }; };",
     "const slimTraceOrderAnomaly = (item) => { const v = objectOrNull(item) || {}; return { sampleIndex: v.sampleIndex ?? v.seq ?? null, seq: v.seq ?? null, timestamp: v.timestamp ?? v.ts ?? null, pageRole: clip(v.pageRole, 24), traceId: clip(v.traceId, 64), previousRowIndex: v.previousRowIndex ?? null, currentRowIndex: v.currentRowIndex ?? null, reasons: Array.isArray(v.reasons) ? v.reasons.slice(0, 6).map((x) => clip(x, 48)) : [], previousTotalSeconds: v.previousTotalSeconds ?? null, currentTotalSeconds: v.currentTotalSeconds ?? null, previousClockSeconds: v.previousClockSeconds ?? null, currentClockSeconds: v.currentClockSeconds ?? null, previousPreview: clip(v.previousPreview, 180), currentPreview: clip(v.currentPreview, 180) }; };",
     "const slimTraceOrderMetrics = (value) => { const v = objectOrNull(value); if (!v) return null; const s = objectOrNull(v.summary); return { summary: { sampleCount: v.sampleCount ?? s?.sampleCount ?? null, traceRowCount: v.traceRowCount ?? s?.traceRowCount ?? null, orderAnomalyCount: v.orderAnomalyCount ?? s?.orderAnomalyCount ?? (Array.isArray(v.orderAnomalies) ? v.orderAnomalies.length : null), completionNotLastCount: v.completionNotLastCount ?? s?.completionNotLastCount ?? (Array.isArray(v.completionNotLast) ? v.completionNotLast.length : null) }, orderAnomalies: takeHead(v.orderAnomalies, 8).map(slimTraceOrderAnomaly), valuesRedacted: true }; };",
     "const slimLoadingOwner = (item) => { const v = objectOrNull(item) || {}; return { ownerKey: clip(v.ownerKey, 120), ownerKind: clip(v.ownerKind, 32), ownerLabel: clip(v.ownerLabel, 120), ownerTraceId: clip(v.ownerTraceId, 64), ownerMessageId: clip(v.ownerMessageId, 64), ownerSessionId: clip(v.ownerSessionId, 64), sampleCount: v.sampleCount ?? null, occurrenceCount: v.occurrenceCount ?? null, maxSimultaneousCount: v.maxSimultaneousCount ?? null, longestContinuousSeconds: v.longestContinuousSeconds ?? null, firstSeq: v.firstSeq ?? null, lastSeq: v.lastSeq ?? null, promptIndexes: Array.isArray(v.promptIndexes) ? v.promptIndexes.slice(0, 8) : [] }; };",
@@ -8936,7 +8936,7 @@ function recoverWebObserveAnalyzeTurnDetails(options: NodeWebProbeObserveOptions
     "const firstNonEmptyArray = (...values) => { for (const value of values) if (Array.isArray(value) && value.length > 0) return value; return []; };",
     "const clip = (value, limit = 160) => value === null || value === undefined ? null : String(value).slice(0, limit);",
     "const slimRound = (item) => { const v = objectOrNull(item) || {}; return { promptIndex: v.promptIndex ?? null, sampleCount: v.sampleCount ?? null, loadingSamples: v.loadingSamples ?? null, maxLoadingCount: v.maxLoadingCount ?? null, loadingOwnerCount: v.loadingOwnerCount ?? null, lastTotalElapsedSeconds: v.lastTotalElapsedSeconds ?? null, lastRecentUpdateSeconds: v.lastRecentUpdateSeconds ?? null, diagnosticSamples: v.diagnosticSamples ?? null, terminalSamples: v.terminalSamples ?? null, turnTimingTotalElapsedForwardJumpCount: v.turnTimingTotalElapsedForwardJumpCount ?? null, turnTimingTotalElapsedForwardJumpMaxSeconds: v.turnTimingTotalElapsedForwardJumpMaxSeconds ?? null, promptTextHash: clip(v.promptTextHash, 80) }; };",
-    "const slimTurnColumn = (item) => { const v = objectOrNull(item) || {}; return { label: clip(v.label, 24), pageRole: clip(v.pageRole, 24), pageId: clip(v.pageId, 32), promptIndex: v.promptIndex ?? null, lastPromptIndex: v.lastPromptIndex ?? null, traceId: clip(v.traceId, 48), firstSeq: v.firstSeq ?? null, lastSeq: v.lastSeq ?? null, source: clip(v.source, 48) }; };",
+    "const slimTurnColumn = (item) => { const v = objectOrNull(item) || {}; return { label: clip(v.label, 24), pageRole: clip(v.pageRole, 24), pageId: clip(v.pageId, 32), pageEpoch: v.pageEpoch ?? null, promptIndex: v.promptIndex ?? null, lastPromptIndex: v.lastPromptIndex ?? null, traceId: clip(v.traceId, 48), firstSeq: v.firstSeq ?? null, lastSeq: v.lastSeq ?? null, source: clip(v.source, 48) }; };",
     "const rounds = firstNonEmptyArray(stdoutJson.sampleMetrics?.rounds, stdoutJson.sampleMetrics?.roundItems, report.windows?.recent?.sampleMetrics?.rounds, report.sampleMetrics?.rounds).slice(-8).map(slimRound);",
     "const turnColumns = firstNonEmptyArray(stdoutJson.sampleMetrics?.turnColumns, report.windows?.recent?.sampleMetrics?.turnColumns, report.sampleMetrics?.turnColumns).slice(-12).map(slimTurnColumn);",
     "console.log(JSON.stringify({ ok: true, rounds, turnColumns }));",
@@ -9004,8 +9004,9 @@ function renderWebObserveAnalyzeTable(value: Record<string, unknown>): string {
   const pageLabel = (item: Record<string, unknown>): string => {
     const role = webObserveText(item.pageRole);
     const pageId = webObserveShort(webObserveText(item.pageId), 18);
+    const epoch = webObserveText(item.pageEpoch);
     if (role === "-" && pageId === "-") return "-";
-    return `${role}/${pageId}`;
+    return epoch === "-" ? `${role}/${pageId}` : `${role}/${pageId}#${epoch}`;
   };
   const promptNetwork = record(analysis?.promptNetwork);
   const loading = record(sampleMetrics?.loading);

scripts/src/hwlab-node-web-observe-runner-source.ts

@@ -62,6 +62,8 @@ let terminalStatus = "starting";
 let lastScreenshotAtMs = 0;
 let auth = null;
 let pageLoadSeq = 0;
+let controlPageEpoch = 0;
+let observerPageEpoch = 0;
 let currentPageProvenance = null;
 const jsonlRotation = { stamp: compactFileTimestamp(startedAt), files: [] };
 
@@ -361,21 +363,22 @@ async function syncObserverPageToControlSession(reason, explicitSessionId = null
   const targetUrl = new URL(target, baseUrl).toString();
   const beforeUrl = pageUrl(observerPage);
   const beforeSessionId = routeSessionIdFromUrl(beforeUrl);
-  if (sessionId && beforeSessionId === sessionId && !forceRefresh) return { ok: true, reason, changed: false, observerRoundTrip: false, sessionId, beforeUrl, afterUrl: beforeUrl, pageRole: "observer", pageId: observerPageId };
+  if (sessionId && beforeSessionId === sessionId && !forceRefresh) return { ok: true, reason, changed: false, observerRoundTrip: false, sessionId, beforeUrl, afterUrl: beforeUrl, pageRole: "observer", pageId: observerPageId, pageEpoch: observerPageEpoch };
+  observerPageEpoch += 1;
   let status = null;
   let statusText = null;
   const response = await observerPage.goto(targetUrl, { waitUntil: "domcontentloaded", timeout: 45000 }).catch((error) => ({ observerGotoError: errorSummary(error) }));
-  if (response?.observerGotoError) return { ok: false, reason, changed: false, sessionId: sessionId ?? null, targetPath: target, beforeUrl, afterUrl: pageUrl(observerPage), pageRole: "observer", pageId: observerPageId, error: response.observerGotoError, valuesRedacted: true };
+  if (response?.observerGotoError) return { ok: false, reason, changed: false, sessionId: sessionId ?? null, targetPath: target, beforeUrl, afterUrl: pageUrl(observerPage), pageRole: "observer", pageId: observerPageId, pageEpoch: observerPageEpoch, error: response.observerGotoError, valuesRedacted: true };
   status = typeof response?.status === "function" ? response.status() : null;
   statusText = typeof response?.statusText === "function" ? response.statusText() : null;
   const readiness = await waitForTargetPageReady(observerPage, targetUrl, { timeoutMs: 15000 });
   if (!readiness.ok) {
     lastObserverRefreshAtMs = Date.now();
-    return { ok: false, reason, changed: true, observerRoundTrip: forceRefresh, sessionId: sessionId ?? null, targetPath: target, beforeUrl, afterUrl: pageUrl(observerPage), pageRole: "observer", pageId: observerPageId, httpStatus: status, statusText, readiness, hydration: null, failureKind: readiness.reason || "observer-target-not-ready", valuesRedacted: true };
+    return { ok: false, reason, changed: true, observerRoundTrip: forceRefresh, sessionId: sessionId ?? null, targetPath: target, beforeUrl, afterUrl: pageUrl(observerPage), pageRole: "observer", pageId: observerPageId, pageEpoch: observerPageEpoch, httpStatus: status, statusText, readiness, hydration: null, failureKind: readiness.reason || "observer-target-not-ready", valuesRedacted: true };
   }
   const hydration = await waitForWorkbenchSessionHydrated(observerPage, sessionId, { timeoutMs: 15000 });
   lastObserverRefreshAtMs = Date.now();
-  return { ok: hydration.ok === true, reason, changed: true, observerRoundTrip: forceRefresh, sessionId: sessionId ?? null, targetPath: target, beforeUrl, afterUrl: pageUrl(observerPage), pageRole: "observer", pageId: observerPageId, httpStatus: status, statusText, readiness, hydration, failureKind: hydration.ok === true ? null : hydration.reason || "observer-session-hydration-failed", valuesRedacted: true };
+  return { ok: hydration.ok === true, reason, changed: true, observerRoundTrip: forceRefresh, sessionId: sessionId ?? null, targetPath: target, beforeUrl, afterUrl: pageUrl(observerPage), pageRole: "observer", pageId: observerPageId, pageEpoch: observerPageEpoch, httpStatus: status, statusText, readiness, hydration, failureKind: hydration.ok === true ? null : hydration.reason || "observer-session-hydration-failed", valuesRedacted: true };
 }
 
 async function waitForWorkbenchSessionHydrated(targetPage, sessionId, options = {}) {
@@ -1332,9 +1335,9 @@ async function preflightSummary() {
 async function samplePage(reason, options = {}) {
   if (options?.refreshObserver !== false) await maybeRefreshObserverPage(reason);
   const groupSeq = sampleSeq + 1;
-  if (page && !page.isClosed()) await sampleOnePage(page, { reason, groupSeq, pageRole: "control", targetPageId: pageId });
+  if (page && !page.isClosed()) await sampleOnePage(page, { reason, groupSeq, pageRole: "control", targetPageId: pageId, pageEpoch: controlPageEpoch });
   if (observerPage && !observerPage.isClosed()) {
-    await sampleOnePage(observerPage, { reason, groupSeq, pageRole: "observer", targetPageId: observerPageId }).catch((error) => appendJsonl(files.errors, eventRecord("observer-sample-error", { pageRole: "observer", pageId: observerPageId, error: errorSummary(error) })));
+    await sampleOnePage(observerPage, { reason, groupSeq, pageRole: "observer", targetPageId: observerPageId, pageEpoch: observerPageEpoch }).catch((error) => appendJsonl(files.errors, eventRecord("observer-sample-error", { pageRole: "observer", pageId: observerPageId, pageEpoch: observerPageEpoch, error: errorSummary(error) })));
   }
   if (options?.screenshot !== false && screenshotIntervalMs > 0 && Date.now() - lastScreenshotAtMs >= screenshotIntervalMs) {
     await captureScreenshot("checkpoint", "jpeg").catch((error) => appendJsonl(files.errors, eventRecord("screenshot-error", { pageRole: "control", pageId, error: errorSummary(error) })));
@@ -1342,7 +1345,7 @@ async function samplePage(reason, options = {}) {
   await writeHeartbeat({ status: terminalStatus });
 }
 
-async function sampleOnePage(targetPage, { reason, groupSeq, pageRole, targetPageId }) {
+async function sampleOnePage(targetPage, { reason, groupSeq, pageRole, targetPageId, pageEpoch }) {
   sampleSeq += 1;
   const dom = await targetPage.evaluate(() => {
     const trim = (value, limit = 500) => String(value || "").replace(/\s+/g, " ").trim().slice(0, limit);
@@ -1804,6 +1807,7 @@ async function sampleOnePage(targetPage, { reason, groupSeq, pageRole, targetPag
     reason,
     pageRole,
     pageId: targetPageId,
+    pageEpoch: Number.isFinite(Number(pageEpoch)) ? Number(pageEpoch) : 0,
     commandId: activeCommandId,
     observerInitiated: false,
     ...digestDom(dom, pageRole),
@@ -2198,7 +2202,7 @@ console.log(JSON.stringify({
   sampleMetrics: {
     ...recentWindow.sampleMetrics.summary,
     rounds: recentWindow.sampleMetrics.rounds.slice(-8).map((item) => ({ promptIndex: item.promptIndex, promptTextHash: item.promptTextHash, sampleCount: item.sampleCount, firstSeq: item.firstSeq, lastSeq: item.lastSeq, lastTotalElapsedSeconds: item.lastTotalElapsedSeconds, lastRecentUpdateSeconds: item.lastRecentUpdateSeconds, loadingSamples: item.loadingSamples, maxLoadingCount: item.maxLoadingCount, loadingOwnerCount: item.loadingOwnerCount, diagnosticSamples: item.diagnosticSamples, terminalSamples: item.terminalSamples, finalTextSamples: item.finalTextSamples, turnTimingTotalElapsedZeroResetCount: item.turnTimingTotalElapsedZeroResetCount, turnTimingTotalElapsedForwardJumpCount: item.turnTimingTotalElapsedForwardJumpCount, turnTimingTotalElapsedForwardJumpMaxSeconds: item.turnTimingTotalElapsedForwardJumpMaxSeconds, turnTimingRecentUpdateJumpCount: item.turnTimingRecentUpdateJumpCount, turnTimingRecentUpdateMaxIncreaseSeconds: item.turnTimingRecentUpdateMaxIncreaseSeconds })),
-    turnColumns: recentWindow.sampleMetrics.turnColumns.slice(-12).map((item) => ({ label: item.label, source: item.source, pageRole: item.pageRole ?? null, pageId: item.pageId ?? null, promptIndex: item.promptIndex, lastPromptIndex: item.lastPromptIndex, firstSeq: item.firstSeq, lastSeq: item.lastSeq, traceId: item.traceId, messageId: item.messageId })),
+    turnColumns: recentWindow.sampleMetrics.turnColumns.slice(-12).map((item) => ({ label: item.label, source: item.source, pageRole: item.pageRole ?? null, pageId: item.pageId ?? null, pageEpoch: item.pageEpoch ?? null, promptIndex: item.promptIndex, lastPromptIndex: item.lastPromptIndex, firstSeq: item.firstSeq, lastSeq: item.lastSeq, traceId: item.traceId, messageId: item.messageId })),
     loading: compactLoadingMetricsForOutput(recentWindow.sampleMetrics.loading),
     sessionRailTitles: compactSessionRailTitleMetricsForOutput(recentWindow.sampleMetrics.sessionRailTitles),
   },
@@ -2271,6 +2275,9 @@ console.log(JSON.stringify({
   })),
   turnTimingRecentUpdateJumps: recentWindow.sampleMetrics.turnTimingRecentUpdateSawtoothJumps.slice(0, 8).map((item) => ({
     columnLabel: item.columnLabel ?? item.columnId ?? null,
+    pageRole: item.pageRole ?? null,
+    pageId: item.pageId ?? null,
+    pageEpoch: item.pageEpoch ?? null,
     promptIndex: item.promptIndex ?? null,
     traceId: item.traceId ?? null,
     fromSeq: item.fromSeq ?? null,
@@ -2286,6 +2293,9 @@ console.log(JSON.stringify({
   })),
   turnTimingElapsedZeroResets: recentWindow.sampleMetrics.turnTimingElapsedZeroResets.slice(0, 8).map((item) => ({
     columnLabel: item.columnLabel ?? item.columnId ?? null,
+    pageRole: item.pageRole ?? null,
+    pageId: item.pageId ?? null,
+    pageEpoch: item.pageEpoch ?? null,
     promptIndex: item.promptIndex ?? null,
     traceId: item.traceId ?? null,
     fromSeq: item.fromSeq ?? null,
@@ -2299,6 +2309,9 @@ console.log(JSON.stringify({
   })),
   turnTimingTotalElapsedForwardJumps: recentWindow.sampleMetrics.turnTimingTotalElapsedForwardJumps.slice(0, 8).map((item) => ({
     columnLabel: item.columnLabel ?? item.columnId ?? null,
+    pageRole: item.pageRole ?? null,
+    pageId: item.pageId ?? null,
+    pageEpoch: item.pageEpoch ?? null,
     promptIndex: item.promptIndex ?? null,
     traceId: item.traceId ?? null,
     fromSeq: item.fromSeq ?? null,
@@ -4587,14 +4600,15 @@ function buildTurnTimingTable(samples, timeline) {
     const domIndexes = rawMetrics.map((item) => Number(item.domIndex)).filter(Number.isFinite);
     const maxDomIndex = domIndexes.length > 0 ? Math.max(...domIndexes) : null;
     for (const rawMetric of rawMetrics) {
+      const scopedKey = turnTimingScopedMetricKey(rawMetric, sample);
       const samplePromptIndex = Number(timelineItem.promptIndex ?? 0);
       const evidencePromptIndex = inferTurnMetricPromptIndex(rawMetric, samplePromptIndex, maxDomIndex);
       if (evidencePromptIndex !== null) {
-        const existingPromptIndex = promptAssignmentByKey.get(rawMetric.key);
-        if (existingPromptIndex === undefined || evidencePromptIndex > existingPromptIndex) promptAssignmentByKey.set(rawMetric.key, evidencePromptIndex);
+        const existingPromptIndex = promptAssignmentByKey.get(scopedKey);
+        if (existingPromptIndex === undefined || evidencePromptIndex > existingPromptIndex) promptAssignmentByKey.set(scopedKey, evidencePromptIndex);
       }
-      const assignedPromptIndex = promptAssignmentByKey.get(rawMetric.key) ?? null;
-      const metric = { ...rawMetric, promptIndex: assignedPromptIndex, samplePromptIndex };
+      const assignedPromptIndex = promptAssignmentByKey.get(scopedKey) ?? null;
+      const metric = { ...rawMetric, key: scopedKey, baseKey: rawMetric.key, promptIndex: assignedPromptIndex, samplePromptIndex, pageEpoch: Number(sample?.pageEpoch ?? rawMetric.pageEpoch ?? 0) || 0 };
       let column = registry.get(metric.key);
       if (!column) {
         column = {
@@ -4612,7 +4626,8 @@ function buildTurnTimingTable(samples, timeline) {
           messageId: metric.messageId ?? null,
           domIndex: metric.domIndex ?? null,
           pageRole: metric.pageRole ?? sample.pageRole ?? null,
-          pageId: metric.pageId ?? sample.pageId ?? null
+          pageId: metric.pageId ?? sample.pageId ?? null,
+          pageEpoch: metric.pageEpoch ?? null
         };
         registry.set(metric.key, column);
         columns.push(column);
@@ -4633,6 +4648,7 @@ function buildTurnTimingTable(samples, timeline) {
         source: metric.source,
         pageRole: metric.pageRole ?? sample.pageRole ?? null,
         pageId: metric.pageId ?? sample.pageId ?? null,
+        pageEpoch: metric.pageEpoch ?? null,
         sampleGroupSeq: sample.sampleGroupSeq ?? null,
         traceId: metric.traceId ?? null,
         messageId: metric.messageId ?? null,
@@ -4646,6 +4662,7 @@ function buildTurnTimingTable(samples, timeline) {
       sampleGroupSeq: sample.sampleGroupSeq ?? null,
       pageRole: sample.pageRole ?? null,
       pageId: sample.pageId ?? null,
+      pageEpoch: Number(sample?.pageEpoch ?? 0) || 0,
       promptIndex: timelineItem.promptIndex ?? 0,
       routeSessionId: sample.routeSessionId ?? null,
       activeSessionId: sample.activeSessionId ?? null,
@@ -4665,6 +4682,15 @@ function buildTurnTimingTable(samples, timeline) {
   };
 }
 
+function turnTimingScopedMetricKey(metric, sample) {
+  return [
+    metric?.key ?? "unknown",
+    metric?.pageRole ?? sample?.pageRole ?? "unknown-role",
+    metric?.pageId ?? sample?.pageId ?? "unknown-page",
+    Number(sample?.pageEpoch ?? metric?.pageEpoch ?? 0) || 0
+  ].join("|page:");
+}
+
 function inferTurnMetricPromptIndex(metric, samplePromptIndex, maxDomIndex) {
   const promptIndex = Number(samplePromptIndex);
   if (!Number.isFinite(promptIndex) || promptIndex <= 0) return null;
@@ -4715,6 +4741,7 @@ function detectTurnTimingNonMonotonic(columns, rows) {
             source: cell.source ?? column.source ?? null,
             pageRole: cell.pageRole ?? column.pageRole ?? null,
             pageId: cell.pageId ?? column.pageId ?? null,
+            pageEpoch: cell.pageEpoch ?? row.pageEpoch ?? column.pageEpoch ?? null,
             valuesRedacted: true
           };
           anomalies.push(event);
@@ -4751,6 +4778,7 @@ function detectTurnTimingNonMonotonic(columns, rows) {
               source: cell.source ?? column.source ?? null,
               pageRole: cell.pageRole ?? column.pageRole ?? null,
               pageId: cell.pageId ?? column.pageId ?? null,
+              pageEpoch: cell.pageEpoch ?? row.pageEpoch ?? column.pageEpoch ?? null,
               valuesRedacted: true
             });
           }
@@ -4779,6 +4807,7 @@ function detectTurnTimingNonMonotonic(columns, rows) {
               source: cell.source ?? column.source ?? null,
               pageRole: cell.pageRole ?? column.pageRole ?? null,
               pageId: cell.pageId ?? column.pageId ?? null,
+              pageEpoch: cell.pageEpoch ?? row.pageEpoch ?? column.pageEpoch ?? null,
               valuesRedacted: true
             });
           }
@@ -4815,6 +4844,7 @@ function detectTurnTimingNonMonotonic(columns, rows) {
             source: cell.source ?? column.source ?? null,
             pageRole: cell.pageRole ?? column.pageRole ?? null,
             pageId: cell.pageId ?? column.pageId ?? null,
+            pageEpoch: cell.pageEpoch ?? row.pageEpoch ?? column.pageEpoch ?? null,
             valuesRedacted: true
           });
           if (increase < 0) {
@@ -4838,6 +4868,7 @@ function detectTurnTimingNonMonotonic(columns, rows) {
               source: cell.source ?? column.source ?? null,
               pageRole: cell.pageRole ?? column.pageRole ?? null,
               pageId: cell.pageId ?? column.pageId ?? null,
+              pageEpoch: cell.pageEpoch ?? row.pageEpoch ?? column.pageEpoch ?? null,
               valuesRedacted: true
             });
           }
@@ -4865,6 +4896,7 @@ function detectTurnTimingNonMonotonic(columns, rows) {
               source: cell.source ?? column.source ?? null,
               pageRole: cell.pageRole ?? column.pageRole ?? null,
               pageId: cell.pageId ?? column.pageId ?? null,
+              pageEpoch: cell.pageEpoch ?? row.pageEpoch ?? column.pageEpoch ?? null,
               valuesRedacted: true
             });
           }