diff --git a/packages/ui/src/App.tsx b/packages/ui/src/App.tsx
index 9cd9e831..cf81988b 100644
--- a/packages/ui/src/App.tsx
+++ b/packages/ui/src/App.tsx
@@ -7,6 +7,7 @@ import { Toaster } from '@/components/ui/sonner';
 import { Button } from '@/components/ui/button';
 import { MemoryDebugPanel } from '@/components/ui/MemoryDebugPanel';
 import { setStreamPerfEnabled } from '@/stores/utils/streamDebug';
+import { setRequestsInFlightTrackingEnabled } from '@/stores/utils/requestsInFlight';
 import { ErrorBoundary } from '@/components/ui/ErrorBoundary';
 // useEventStream removed — replaced by SyncProvider + SyncBridge
 import { useMenuActions } from '@/hooks/useMenuActions';
@@ -279,6 +280,13 @@ function App({ apis }: AppProps) {
     };
   }, [showMemoryDebug]);
 
+  React.useEffect(() => {
+    setRequestsInFlightTrackingEnabled(showMemoryDebug);
+    return () => {
+      setRequestsInFlightTrackingEnabled(false);
+    };
+  }, [showMemoryDebug]);
+
   React.useEffect(() => {
     applyMobileKeyboardMode(mobileKeyboardMode);
   }, [mobileKeyboardMode]);
diff --git a/packages/ui/src/components/ui/MemoryDebugPanel.tsx b/packages/ui/src/components/ui/MemoryDebugPanel.tsx
index 436be6b8..957e654b 100644
--- a/packages/ui/src/components/ui/MemoryDebugPanel.tsx
+++ b/packages/ui/src/components/ui/MemoryDebugPanel.tsx
@@ -7,6 +7,7 @@ import { MEMORY_LIMITS } from '@/stores/types/sessionTypes';
 import { useGitHubPrStatusStore } from '@/stores/useGitHubPrStatusStore';
 import { getBackgroundTrimLimit } from '@/stores/types/sessionTypes';
 import { getStreamPerfSnapshot, getVsCodeStreamPerfSnapshot, resetStreamPerf, type StreamPerfSnapshot } from '@/stores/utils/streamDebug';
+import { getRequestsInFlightSnapshot, resetRequestsInFlight, type RequestsInFlightSnapshot } from '@/stores/utils/requestsInFlight';
 import { Card } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
 import { Tooltip, TooltipTrigger, TooltipContent } from '@/components/ui/tooltip';
@@ -18,7 +19,7 @@ interface DebugPanelProps {
   onClose?: () => void;
 }
 
-type DebugTab = 'memory' | 'streaming';
+type DebugTab = 'memory' | 'streaming' | 'requests';
 
 const formatDuration = (durationMs: number): string => {
   if (durationMs < 1000) {
@@ -35,6 +36,10 @@ const formatDuration = (durationMs: number): string => {
   return `${minutes}m ${remainderSeconds}s`;
 };
 
+// Fixed-width seconds format ("XX.XX s") for the percentile series so the
+// legend/labels don't jitter as values change. Pair with `tabular-nums`.
+const formatSeconds = (durationMs: number): string => `${(durationMs / 1000).toFixed(2)} s`;
+
 const MetricCard: React.FC<{ label: string; value: React.ReactNode }> = ({ label, value }) => {
   return (
     <div
@@ -99,7 +104,75 @@ const PerfSection: React.FC<{ title: string; snapshot: StreamPerfSnapshot; empty
   );
 };
 
-const DebugPanel: React.FC<DebugPanelProps> = ({ onClose }) => {
+type LineSeries = { samples: number[]; color: string; filled?: boolean };
+
+const LineChart: React.FC<{
+  series: LineSeries[];
+  peak: number;
+  windowSeconds: number;
+  ariaLabel: string;
+  maxLabel: string;
+}> = ({ series, peak, windowSeconds, ariaLabel, maxLabel }) => {
+  const width = windowSeconds;
+  const height = 56;
+  const padTop = 4;
+  const n = series.reduce((max, s) => Math.max(max, s.samples.length), 0);
+  const scale = peak > 0 ? (height - padTop) / peak : 0;
+  const xFor = (i: number): number => width - n + i;
+  const yFor = (v: number): number => height - v * scale;
+  const baseline = height;
+
+  return (
+    <div className="relative w-full">
+      <span className="pointer-events-none absolute left-0 top-0 typography-meta text-[var(--surface-muted-foreground)]">{maxLabel}</span>
+      <svg
+        viewBox={`0 0 ${width} ${height}`}
+        preserveAspectRatio="none"
+        className="h-14 w-full"
+        role="img"
+        aria-label={ariaLabel}
+      >
+        <line
+          x1={0}
+          y1={baseline}
+          x2={width}
+          y2={baseline}
+          stroke="var(--interactive-border)"
+          strokeWidth={1}
+          vectorEffect="non-scaling-stroke"
+        />
+        {series.map((s, si) => {
+          const sn = s.samples.length;
+          if (sn === 0) return null;
+          const points = s.samples.map((v, i) => `${xFor(i)},${yFor(v).toFixed(2)}`);
+          const linePath = `M ${points.join(' L ')}`;
+          return (
+            <React.Fragment key={si}>
+              {s.filled ? (
+                <path
+                  d={`M ${xFor(0)},${baseline} L ${points.join(' L ')} L ${xFor(sn - 1)},${baseline} Z`}
+                  fill={`color-mix(in srgb, ${s.color} 18%, transparent)`}
+                  stroke="none"
+                />
+              ) : null}
+              <path
+                d={linePath}
+                fill="none"
+                stroke={s.color}
+                strokeWidth={1.5}
+                strokeLinejoin="round"
+                strokeLinecap="round"
+                vectorEffect="non-scaling-stroke"
+              />
+            </React.Fragment>
+          );
+        })}
+      </svg>
+    </div>
+  );
+};
+
+export const DebugPanel: React.FC<DebugPanelProps> = ({ onClose }) => {
   const { t } = useI18n();
   const [activeTab, setActiveTab] = React.useState<DebugTab>('memory');
   const [copyState, setCopyState] = React.useState<'idle' | 'copied' | 'error'>('idle');
@@ -110,6 +183,15 @@ const DebugPanel: React.FC<DebugPanelProps> = ({ onClose }) => {
   const totalGitHubRequests = useGitHubPrStatusStore((state) => state.totalRequestCount);
   const [streamSnapshot, setStreamSnapshot] = React.useState<StreamPerfSnapshot>(() => getStreamPerfSnapshot());
   const [vscodeStreamSnapshot, setVsCodeStreamSnapshot] = React.useState<StreamPerfSnapshot>(() => getVsCodeStreamPerfSnapshot());
+  const [requestsSnapshot, setRequestsSnapshot] = React.useState<RequestsInFlightSnapshot>(() => getRequestsInFlightSnapshot());
+  const ageLines = [
+    { label: 'p50', current: requestsSnapshot.ageP50, samples: requestsSnapshot.p50Samples, color: 'var(--status-success)' },
+    { label: 'p90', current: requestsSnapshot.ageP90, samples: requestsSnapshot.p90Samples, color: 'var(--status-info)' },
+    { label: 'p99', current: requestsSnapshot.ageP99, samples: requestsSnapshot.p99Samples, color: 'var(--status-warning)' },
+    { label: 'max', current: requestsSnapshot.ageMax, samples: requestsSnapshot.maxSamples, color: 'var(--status-error)' },
+  ];
+  const countMax = requestsSnapshot.samples.reduce((m, v) => Math.max(m, v), 0);
+  const percentileMax = ageLines.reduce((m, l) => l.samples.reduce((mm, v) => Math.max(mm, v), m), 0);
   const streamMetricCounts = React.useMemo(() => {
     const counts = new Map<string, number>();
     streamSnapshot.entries.forEach((entry) => {
@@ -130,6 +212,7 @@ const DebugPanel: React.FC<DebugPanelProps> = ({ onClose }) => {
     const refresh = () => {
       setStreamSnapshot(getStreamPerfSnapshot());
       setVsCodeStreamSnapshot(getVsCodeStreamPerfSnapshot());
+      setRequestsSnapshot(getRequestsInFlightSnapshot());
     };
 
     refresh();
@@ -218,11 +301,10 @@ const DebugPanel: React.FC<DebugPanelProps> = ({ onClose }) => {
     >
       <div className="mb-3 flex items-center justify-between gap-2">
         <div className="flex items-center gap-2">
-          {activeTab === 'memory' ? (
-            <Icon name="database-2" className="h-4 w-4 text-[var(--surface-foreground)]" />
-          ) : (
-            <Icon name="bar-chart-box" className="h-4 w-4 text-[var(--surface-foreground)]" />
-          )}
+          <Icon
+            name={activeTab === 'memory' ? 'database-2' : activeTab === 'streaming' ? 'bar-chart-box' : 'pulse'}
+            className="h-4 w-4 text-[var(--surface-foreground)]"
+          />
           <h3 className="typography-ui-label font-semibold text-[var(--surface-foreground)]">{t('memoryDebugPanel.title')}</h3>
         </div>
         <div className="flex items-center gap-1">
@@ -244,6 +326,18 @@ const DebugPanel: React.FC<DebugPanelProps> = ({ onClose }) => {
               </Button>
             </>
           ) : null}
+          {activeTab === 'requests' ? (
+            <Button
+              size="xs"
+              variant="ghost"
+              onClick={() => {
+                resetRequestsInFlight();
+                setRequestsSnapshot(getRequestsInFlightSnapshot());
+              }}
+            >
+              <Icon name="refresh" className="h-3.5 w-3.5" />
+            </Button>
+          ) : null}
           {onClose ? (
             <Button size="icon" variant="ghost" className="h-6 w-6" onClick={onClose}>
               <Icon name="close" className="h-4 w-4" />
@@ -272,6 +366,14 @@ const DebugPanel: React.FC<DebugPanelProps> = ({ onClose }) => {
         >
           {t('memoryDebugPanel.tabs.streaming')}
         </Button>
+        <Button
+          size="sm"
+          variant={activeTab === 'requests' ? 'secondary' : 'ghost'}
+          className="flex-1"
+          onClick={() => setActiveTab('requests')}
+        >
+          {t('memoryDebugPanel.tabs.requests')}
+        </Button>
       </div>
 
       {activeTab === 'memory' ? (
@@ -366,7 +468,7 @@ const DebugPanel: React.FC<DebugPanelProps> = ({ onClose }) => {
             </Tooltip>
           </div>
         </div>
-      ) : (
+      ) : activeTab === 'streaming' ? (
         <div className="space-y-3">
           <div className="flex items-center justify-between gap-2 rounded-md border border-[var(--interactive-border)] px-3 py-2 typography-meta text-[var(--surface-muted-foreground)]">
             <span>
@@ -409,6 +511,70 @@ const DebugPanel: React.FC<DebugPanelProps> = ({ onClose }) => {
             />
           ) : null}
         </div>
+      ) : (
+        <div className="space-y-3">
+          <div className="grid grid-cols-2 gap-2 typography-meta">
+            <MetricCard label={t('memoryDebugPanel.requests.totalRequests')} value={`${requestsSnapshot.totalSettled} / ${requestsSnapshot.totalStarted}`} />
+            <MetricCard
+              label={t('memoryDebugPanel.requests.tracking')}
+              value={requestsSnapshot.startedAt ? formatDuration(requestsSnapshot.durationMs) : t('memoryDebugPanel.common.idle')}
+            />
+          </div>
+
+          {requestsSnapshot.samples.length === 0 ? (
+            <div
+              className="rounded-md p-3 typography-meta text-[var(--surface-muted-foreground)]"
+              style={{ backgroundColor: 'color-mix(in srgb, var(--surface-muted) 45%, transparent)' }}
+            >
+              {t('memoryDebugPanel.requests.noSamples')}
+            </div>
+          ) : (
+            <div className="space-y-1.5">
+              <div className="flex items-center justify-between typography-meta">
+                <span className="text-[var(--surface-muted-foreground)]">{t('memoryDebugPanel.requests.inFlight')}</span>
+                <span>
+                  <span className="font-medium text-[var(--surface-foreground)]">{requestsSnapshot.inFlight}</span>
+                  <span className="text-[var(--surface-muted-foreground)]"> · {t('memoryDebugPanel.requests.peak')} </span>
+                  <span className="font-medium text-[var(--surface-foreground)]">{requestsSnapshot.peak}</span>
+                </span>
+              </div>
+              <LineChart
+                series={[{ samples: requestsSnapshot.samples, color: 'var(--status-info)', filled: true }]}
+                peak={countMax}
+                windowSeconds={requestsSnapshot.windowSeconds}
+                ariaLabel={t('memoryDebugPanel.requests.chartLabel', { peak: requestsSnapshot.peak })}
+                maxLabel={`${countMax}`}
+              />
+
+              <div className="flex items-center justify-between typography-meta">
+                <span className="text-[var(--surface-muted-foreground)]">{t('memoryDebugPanel.requests.duration')}</span>
+                <span className="font-medium tabular-nums text-[var(--surface-foreground)]">{formatSeconds(requestsSnapshot.peakAgeMs)}</span>
+              </div>
+              <LineChart
+                series={ageLines.map((line) => ({ samples: line.samples, color: line.color }))}
+                peak={percentileMax}
+                windowSeconds={requestsSnapshot.windowSeconds}
+                ariaLabel={t('memoryDebugPanel.requests.percentileChartLabel')}
+                maxLabel={formatSeconds(percentileMax)}
+              />
+
+              <div className="flex flex-wrap items-center gap-x-3 gap-y-1 typography-meta">
+                {ageLines.map((line) => (
+                  <span key={line.label} className="flex items-center gap-1">
+                    <span className="inline-block h-2 w-2 rounded-full" style={{ backgroundColor: line.color }} />
+                    <span className="text-[var(--surface-muted-foreground)]">{line.label}</span>
+                    <span className="font-medium tabular-nums text-[var(--surface-foreground)]">{formatSeconds(line.current)}</span>
+                  </span>
+                ))}
+              </div>
+
+              <div className="flex items-center justify-between typography-meta text-[var(--surface-muted-foreground)]">
+                <span>{t('memoryDebugPanel.requests.windowHint', { seconds: requestsSnapshot.windowSeconds })}</span>
+                <span>{t('memoryDebugPanel.requests.now')}</span>
+              </div>
+            </div>
+          )}
+        </div>
       )}
     </Card>
   );
diff --git a/packages/ui/src/lib/i18n/messages/en.ts b/packages/ui/src/lib/i18n/messages/en.ts
index 47104589..21816f4e 100644
--- a/packages/ui/src/lib/i18n/messages/en.ts
+++ b/packages/ui/src/lib/i18n/messages/en.ts
@@ -3011,6 +3011,7 @@ export const dict = {
   'memoryDebugPanel.title': 'Debug Panel',
   'memoryDebugPanel.tabs.memory': 'Memory',
   'memoryDebugPanel.tabs.streaming': 'Streaming',
+  'memoryDebugPanel.tabs.requests': 'Requests',
   'memoryDebugPanel.section.sessionsInMemory': 'Sessions in Memory',
   'memoryDebugPanel.section.uiStreamingMetrics': 'UI Streaming Metrics',
   'memoryDebugPanel.section.vscodeBridgeMetrics': 'VS Code Bridge Metrics',
@@ -3048,6 +3049,16 @@ export const dict = {
   'memoryDebugPanel.streaming.copy.copied': 'Streaming debug JSON copied',
   'memoryDebugPanel.streaming.copy.failed': 'Failed to copy JSON',
   'memoryDebugPanel.streaming.copy.hint': 'Copy exports both UI and VS Code streaming metrics as JSON',
+  'memoryDebugPanel.requests.inFlight': 'In flight',
+  'memoryDebugPanel.requests.peak': 'Peak',
+  'memoryDebugPanel.requests.duration': 'Duration',
+  'memoryDebugPanel.requests.totalRequests': 'Total Requests',
+  'memoryDebugPanel.requests.tracking': 'Tracking',
+  'memoryDebugPanel.requests.now': 'now',
+  'memoryDebugPanel.requests.noSamples': 'No requests tracked yet. Keep this panel open to record fetch activity.',
+  'memoryDebugPanel.requests.chartLabel': 'Fetch requests in flight over time, peak {peak}',
+  'memoryDebugPanel.requests.windowHint': 'last {seconds}s',
+  'memoryDebugPanel.requests.percentileChartLabel': 'In-flight request age percentiles (p50, p90, p99, max) over time',
   'memoryDebugPanel.common.idle': 'idle',
   'memoryDebugPanel.common.live': 'live',
   'memoryDebugPanel.common.notAvailable': 'n/a',
diff --git a/packages/ui/src/lib/i18n/messages/es.ts b/packages/ui/src/lib/i18n/messages/es.ts
index f0f9f48d..37eeadc6 100644
--- a/packages/ui/src/lib/i18n/messages/es.ts
+++ b/packages/ui/src/lib/i18n/messages/es.ts
@@ -2977,6 +2977,7 @@ export const dict: Record<I18nKey, string> = {
   "memoryDebugPanel.title": "Panel de depuración",
   "memoryDebugPanel.tabs.memory": "Memoria",
   "memoryDebugPanel.tabs.streaming": "Transmisión",
+  "memoryDebugPanel.tabs.requests": "Solicitudes",
   "memoryDebugPanel.section.sessionsInMemory": "Sesiones en memoria",
   "memoryDebugPanel.section.uiStreamingMetrics": "Métricas de streaming de UI",
   "memoryDebugPanel.section.vscodeBridgeMetrics": "Métricas del puente de VS Code",
@@ -3014,6 +3015,16 @@ export const dict: Record<I18nKey, string> = {
   "memoryDebugPanel.streaming.copy.copied": "JSON de depuración en streaming copiado",
   "memoryDebugPanel.streaming.copy.failed": "No se pudo copiar JSON",
   "memoryDebugPanel.streaming.copy.hint": "Copia exportaciones de métricas de UI como de métricas de VS Code en formato JSON",
+  "memoryDebugPanel.requests.inFlight": "En curso",
+  "memoryDebugPanel.requests.peak": "Pico",
+  "memoryDebugPanel.requests.duration": "Duración",
+  "memoryDebugPanel.requests.totalRequests": "Solicitudes totales",
+  "memoryDebugPanel.requests.tracking": "Seguimiento",
+  "memoryDebugPanel.requests.now": "ahora",
+  "memoryDebugPanel.requests.noSamples": "Aún no se han registrado solicitudes. Mantén este panel abierto para registrar la actividad de fetch.",
+  "memoryDebugPanel.requests.chartLabel": "Solicitudes fetch en curso a lo largo del tiempo, pico {peak}",
+  "memoryDebugPanel.requests.windowHint": "últimos {seconds}s",
+  "memoryDebugPanel.requests.percentileChartLabel": "Percentiles de antigüedad de solicitudes en curso (p50, p90, p99, máx) a lo largo del tiempo",
   "memoryDebugPanel.common.idle": "inactivo",
   "memoryDebugPanel.common.live": "en vivo",
   "memoryDebugPanel.common.notAvailable": "n/a",
diff --git a/packages/ui/src/lib/i18n/messages/fr.ts b/packages/ui/src/lib/i18n/messages/fr.ts
index eae42bb2..b30b1ba8 100644
--- a/packages/ui/src/lib/i18n/messages/fr.ts
+++ b/packages/ui/src/lib/i18n/messages/fr.ts
@@ -2703,6 +2703,7 @@ export const dict = {
   'memoryDebugPanel.title': 'Panneau de débogage',
   'memoryDebugPanel.tabs.memory': 'Mémoire',
   'memoryDebugPanel.tabs.streaming': 'Streaming',
+  'memoryDebugPanel.tabs.requests': 'Requêtes',
   'memoryDebugPanel.section.sessionsInMemory': 'Sessions en mémoire',
   'memoryDebugPanel.section.uiStreamingMetrics': 'Métriques de streaming de l\'interface utilisateur',
   'memoryDebugPanel.section.vscodeBridgeMetrics': 'Métriques du pont VS Code',
@@ -2740,6 +2741,16 @@ export const dict = {
   'memoryDebugPanel.streaming.copy.copied': 'Débogage en streaming JSON copié',
   'memoryDebugPanel.streaming.copy.failed': 'Échec de la copie de JSON',
   'memoryDebugPanel.streaming.copy.hint': 'La copie exporte les métriques de streaming de l\'interface utilisateur et de VS Code en tant que JSON.',
+  'memoryDebugPanel.requests.inFlight': 'En cours',
+  'memoryDebugPanel.requests.peak': 'Pic',
+  'memoryDebugPanel.requests.duration': 'Durée',
+  'memoryDebugPanel.requests.totalRequests': 'Requêtes totales',
+  'memoryDebugPanel.requests.tracking': 'Suivi',
+  'memoryDebugPanel.requests.now': 'maintenant',
+  'memoryDebugPanel.requests.noSamples': 'Aucune requête enregistrée. Gardez ce panneau ouvert pour enregistrer l\'activité fetch.',
+  'memoryDebugPanel.requests.chartLabel': 'Requêtes fetch en cours dans le temps, pic {peak}',
+  'memoryDebugPanel.requests.windowHint': '{seconds}s dernières',
+  'memoryDebugPanel.requests.percentileChartLabel': 'Percentiles d\'âge des requêtes en cours (p50, p90, p99, max) dans le temps',
   'memoryDebugPanel.common.idle': 'inactif',
   'memoryDebugPanel.common.live': 'en direct',
   'memoryDebugPanel.common.notAvailable': 'n / A',
diff --git a/packages/ui/src/lib/i18n/messages/ja.ts b/packages/ui/src/lib/i18n/messages/ja.ts
index cddf221f..f8ba143d 100644
--- a/packages/ui/src/lib/i18n/messages/ja.ts
+++ b/packages/ui/src/lib/i18n/messages/ja.ts
@@ -3007,6 +3007,7 @@ export const dict: Record<I18nKey, string> = {
   'memoryDebugPanel.title': 'デバッグパネル',
   'memoryDebugPanel.tabs.memory': 'メモリ',
   'memoryDebugPanel.tabs.streaming': 'ストリーミング',
+  'memoryDebugPanel.tabs.requests': 'リクエスト',
   'memoryDebugPanel.section.sessionsInMemory': 'メモリ内のセッション',
   'memoryDebugPanel.section.uiStreamingMetrics': 'UIストリーミングメトリクス',
   'memoryDebugPanel.section.vscodeBridgeMetrics': 'VS Codeブリッジメトリクス',
@@ -3044,6 +3045,16 @@ export const dict: Record<I18nKey, string> = {
   'memoryDebugPanel.streaming.copy.copied': 'ストリーミングデバッグJSONをコピーしました',
   'memoryDebugPanel.streaming.copy.failed': 'JSONのコピーに失敗しました',
   'memoryDebugPanel.streaming.copy.hint': 'UIとVS Codeの両方のストリーミングメトリクスをJSONとしてエクスポートします',
+  'memoryDebugPanel.requests.inFlight': '実行中',
+  'memoryDebugPanel.requests.peak': 'ピーク',
+  'memoryDebugPanel.requests.duration': '期間',
+  'memoryDebugPanel.requests.totalRequests': '合計リクエスト',
+  'memoryDebugPanel.requests.tracking': 'トラッキング',
+  'memoryDebugPanel.requests.now': '現在',
+  'memoryDebugPanel.requests.noSamples': 'まだリクエストが記録されていません。fetchアクティビティを記録するには、このパネルを開いたままにしてください。',
+  'memoryDebugPanel.requests.chartLabel': '経時的な実行中fetchリクエスト、ピーク {peak}',
+  'memoryDebugPanel.requests.windowHint': '過去 {seconds}秒',
+  'memoryDebugPanel.requests.percentileChartLabel': '経時的な実行中リクエストの経過時間パーセンタイル（p50、p90、p99、最大）',
   'memoryDebugPanel.common.idle': '待機中',
   'memoryDebugPanel.common.live': 'ライブ',
   'memoryDebugPanel.common.notAvailable': 'N/A',
diff --git a/packages/ui/src/lib/i18n/messages/ko.ts b/packages/ui/src/lib/i18n/messages/ko.ts
index 4002cd41..c101397d 100644
--- a/packages/ui/src/lib/i18n/messages/ko.ts
+++ b/packages/ui/src/lib/i18n/messages/ko.ts
@@ -3011,6 +3011,7 @@ export const dict: Record<I18nKey, string> = {
   'memoryDebugPanel.title': '디버그 패널',
   'memoryDebugPanel.tabs.memory': '메모리',
   'memoryDebugPanel.tabs.streaming': '스트리밍',
+  'memoryDebugPanel.tabs.requests': '요청',
   'memoryDebugPanel.section.sessionsInMemory': '메모리 내 세션',
   'memoryDebugPanel.section.uiStreamingMetrics': 'UI 스트리밍 지표',
   'memoryDebugPanel.section.vscodeBridgeMetrics': 'VS Code 브리지 지표',
@@ -3048,6 +3049,16 @@ export const dict: Record<I18nKey, string> = {
   'memoryDebugPanel.streaming.copy.copied': '스트리밍 디버그 JSON 복사 완료',
   'memoryDebugPanel.streaming.copy.failed': 'JSON 복사 실패',
   'memoryDebugPanel.streaming.copy.hint': 'UI와 VS Code 스트리밍 메트릭을 JSON으로 복사합니다',
+  'memoryDebugPanel.requests.inFlight': '진행 중',
+  'memoryDebugPanel.requests.peak': '최대',
+  'memoryDebugPanel.requests.duration': '지속 시간',
+  'memoryDebugPanel.requests.totalRequests': '전체 요청',
+  'memoryDebugPanel.requests.tracking': '추적 중',
+  'memoryDebugPanel.requests.now': '현재',
+  'memoryDebugPanel.requests.noSamples': '아직 기록된 요청이 없습니다. fetch 활동을 기록하려면 이 패널을 열어 두세요.',
+  'memoryDebugPanel.requests.chartLabel': '시간에 따른 진행 중인 fetch 요청, 최대 {peak}',
+  'memoryDebugPanel.requests.windowHint': '최근 {seconds}초',
+  'memoryDebugPanel.requests.percentileChartLabel': '진행 중 요청 수명 백분위수(p50, p90, p99, max)의 시간별 변화',
   'memoryDebugPanel.common.idle': '유휴',
   'memoryDebugPanel.common.live': '실시간',
   'memoryDebugPanel.common.notAvailable': 'n/a',
diff --git a/packages/ui/src/lib/i18n/messages/pl.ts b/packages/ui/src/lib/i18n/messages/pl.ts
index 996d2af8..5cfecb08 100644
--- a/packages/ui/src/lib/i18n/messages/pl.ts
+++ b/packages/ui/src/lib/i18n/messages/pl.ts
@@ -2569,8 +2569,19 @@ export const dict: Record<I18nKey, string> = {
   'memoryDebugPanel.streaming.copy.copied': 'Skopiowano JSON debugowania streamingu',
   'memoryDebugPanel.streaming.copy.failed': 'Nie udało się skopiować JSON',
   'memoryDebugPanel.streaming.copy.hint': 'Kopiowanie eksportuje metryki streamingu zarówno UI, jak i VS Code w formacie JSON',
+  'memoryDebugPanel.requests.inFlight': 'W trakcie',
+  'memoryDebugPanel.requests.peak': 'Szczyt',
+  'memoryDebugPanel.requests.duration': 'Czas trwania',
+  'memoryDebugPanel.requests.totalRequests': 'Łączne żądania',
+  'memoryDebugPanel.requests.tracking': 'Śledzenie',
+  'memoryDebugPanel.requests.now': 'teraz',
+  'memoryDebugPanel.requests.noSamples': 'Brak żądań. Utrzymuj ten panel otwarty, aby rejestrować aktywność fetch.',
+  'memoryDebugPanel.requests.chartLabel': 'Żądania fetch w trakcie w czasie, szczyt {peak}',
+  'memoryDebugPanel.requests.windowHint': 'ostatnie {seconds}s',
+  'memoryDebugPanel.requests.percentileChartLabel': 'Percentyle wieku żądań w trakcie (p50, p90, p99, max) w czasie',
   'memoryDebugPanel.tabs.memory': 'Pamięć',
   'memoryDebugPanel.tabs.streaming': 'Streaming',
+  'memoryDebugPanel.tabs.requests': 'Żądania',
   'memoryDebugPanel.title': 'Panel debugowania',
   'memoryDebugPanel.tooltip.logCurrentState': 'Zaloguj bieżący stan pamięci do konsoli przeglądarki',
   'openChamberLogo.aria.logo': 'Logo OpenChamber',
diff --git a/packages/ui/src/lib/i18n/messages/pt-BR.ts b/packages/ui/src/lib/i18n/messages/pt-BR.ts
index 6c9605f9..5ad997ec 100644
--- a/packages/ui/src/lib/i18n/messages/pt-BR.ts
+++ b/packages/ui/src/lib/i18n/messages/pt-BR.ts
@@ -2977,6 +2977,7 @@ export const dict: Record<I18nKey, string> = {
   "memoryDebugPanel.title": "Painel de depuração",
   "memoryDebugPanel.tabs.memory": "Memória",
   "memoryDebugPanel.tabs.streaming": "Transmissão",
+  "memoryDebugPanel.tabs.requests": "Solicitações",
   "memoryDebugPanel.section.sessionsInMemory": "Sessões em memória",
   "memoryDebugPanel.section.uiStreamingMetrics": "Métricas de streaming de UI",
   "memoryDebugPanel.section.vscodeBridgeMetrics": "Métricas da ponte do VS Code",
@@ -3014,6 +3015,16 @@ export const dict: Record<I18nKey, string> = {
   "memoryDebugPanel.streaming.copy.copied": "JSON de depuração em streaming copiado",
   "memoryDebugPanel.streaming.copy.failed": "Não foi possível copiar JSON",
   "memoryDebugPanel.streaming.copy.hint": "Copia exportações de métricas da UI e do VS Code em formato JSON",
+  "memoryDebugPanel.requests.inFlight": "Em curso",
+  "memoryDebugPanel.requests.peak": "Pico",
+  "memoryDebugPanel.requests.duration": "Duração",
+  "memoryDebugPanel.requests.totalRequests": "Solicitações totais",
+  "memoryDebugPanel.requests.tracking": "Rastreamento",
+  "memoryDebugPanel.requests.now": "agora",
+  "memoryDebugPanel.requests.noSamples": "Nenhuma solicitação registrada. Mantenha este painel aberto para registrar a atividade de fetch.",
+  "memoryDebugPanel.requests.chartLabel": "Solicitações fetch em curso ao longo do tempo, pico {peak}",
+  "memoryDebugPanel.requests.windowHint": "últimos {seconds}s",
+  "memoryDebugPanel.requests.percentileChartLabel": "Percentis de idade das solicitações em curso (p50, p90, p99, máx) ao longo do tempo",
   "memoryDebugPanel.common.idle": "inativo",
   "memoryDebugPanel.common.live": "ao vivo",
   "memoryDebugPanel.common.notAvailable": "n/a",
diff --git a/packages/ui/src/lib/i18n/messages/uk.ts b/packages/ui/src/lib/i18n/messages/uk.ts
index a79881fe..b1edee96 100644
--- a/packages/ui/src/lib/i18n/messages/uk.ts
+++ b/packages/ui/src/lib/i18n/messages/uk.ts
@@ -2977,6 +2977,7 @@ export const dict: Record<I18nKey, string> = {
   "memoryDebugPanel.title": "Панель налагодження",
   "memoryDebugPanel.tabs.memory": "Пам'ять",
   "memoryDebugPanel.tabs.streaming": "Потокове передавання",
+  "memoryDebugPanel.tabs.requests": "Запити",
   "memoryDebugPanel.section.sessionsInMemory": "Сесії в пам'яті",
   "memoryDebugPanel.section.uiStreamingMetrics": "Потокові показники інтерфейсу користувача",
   "memoryDebugPanel.section.vscodeBridgeMetrics": "Метрики мосту VS Code",
@@ -3014,6 +3015,16 @@ export const dict: Record<I18nKey, string> = {
   "memoryDebugPanel.streaming.copy.copied": "Потокове налагодження JSON скопійовано",
   "memoryDebugPanel.streaming.copy.failed": "Не вдалося скопіювати JSON",
   "memoryDebugPanel.streaming.copy.hint": "Копіювання експортує метрики потокового інтерфейсу користувача та VS Code як JSON",
+  "memoryDebugPanel.requests.inFlight": "Виконуються",
+  "memoryDebugPanel.requests.peak": "Пік",
+  "memoryDebugPanel.requests.duration": "Тривалість",
+  "memoryDebugPanel.requests.totalRequests": "Усього запитів",
+  "memoryDebugPanel.requests.tracking": "Відстеження",
+  "memoryDebugPanel.requests.now": "зараз",
+  "memoryDebugPanel.requests.noSamples": "Запитів ще немає. Тримайте цю панель відкритою, щоб фіксувати активність fetch.",
+  "memoryDebugPanel.requests.chartLabel": "Запити fetch у виконанні з часом, пік {peak}",
+  "memoryDebugPanel.requests.windowHint": "останні {seconds}s",
+  "memoryDebugPanel.requests.percentileChartLabel": "Перцентилі віку запитів у виконанні (p50, p90, p99, max) з часом",
   "memoryDebugPanel.common.idle": "очікування",
   "memoryDebugPanel.common.live": "live",
   "memoryDebugPanel.common.notAvailable": "n/a",
diff --git a/packages/ui/src/lib/i18n/messages/zh-CN.ts b/packages/ui/src/lib/i18n/messages/zh-CN.ts
index 7b9d57b7..e7526790 100644
--- a/packages/ui/src/lib/i18n/messages/zh-CN.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-CN.ts
@@ -2977,6 +2977,7 @@ export const dict: Record<I18nKey, string> = {
   'memoryDebugPanel.title': '调试面板',
   'memoryDebugPanel.tabs.memory': '内存',
   'memoryDebugPanel.tabs.streaming': '流式',
+  'memoryDebugPanel.tabs.requests': '请求',
   'memoryDebugPanel.section.sessionsInMemory': '内存中的会话',
   'memoryDebugPanel.section.uiStreamingMetrics': 'UI 流式指标',
   'memoryDebugPanel.section.vscodeBridgeMetrics': 'VS Code 桥接指标',
@@ -3014,6 +3015,16 @@ export const dict: Record<I18nKey, string> = {
   'memoryDebugPanel.streaming.copy.copied': '流式调试 JSON 已复制',
   'memoryDebugPanel.streaming.copy.failed': '复制 JSON 失败',
   'memoryDebugPanel.streaming.copy.hint': '复制会导出 UI 与 VS Code 的流式指标 JSON',
+  'memoryDebugPanel.requests.inFlight': '进行中',
+  'memoryDebugPanel.requests.peak': '峰值',
+  'memoryDebugPanel.requests.duration': '时长',
+  'memoryDebugPanel.requests.totalRequests': '请求总数',
+  'memoryDebugPanel.requests.tracking': '跟踪',
+  'memoryDebugPanel.requests.now': '当前',
+  'memoryDebugPanel.requests.noSamples': '尚未记录请求。保持此面板打开以记录 fetch 活动。',
+  'memoryDebugPanel.requests.chartLabel': '随时间变化的进行中 fetch 请求，峰值 {peak}',
+  'memoryDebugPanel.requests.windowHint': '最近 {seconds}秒',
+  'memoryDebugPanel.requests.percentileChartLabel': '进行中请求年龄百分位（p50、p90、p99、最大值）随时间的变化',
   'memoryDebugPanel.common.idle': '空闲',
   'memoryDebugPanel.common.live': '实时',
   'memoryDebugPanel.common.notAvailable': '无',
diff --git a/packages/ui/src/lib/i18n/messages/zh-TW.ts b/packages/ui/src/lib/i18n/messages/zh-TW.ts
index bdbe84bc..2188e355 100644
--- a/packages/ui/src/lib/i18n/messages/zh-TW.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-TW.ts
@@ -2974,6 +2974,7 @@ export const dict: Record<I18nKey, string> = {
   'memoryDebugPanel.title': '偵錯面板',
   'memoryDebugPanel.tabs.memory': '記憶體',
   'memoryDebugPanel.tabs.streaming': '串流',
+  'memoryDebugPanel.tabs.requests': '請求',
   'memoryDebugPanel.section.sessionsInMemory': '記憶體中的會話',
   'memoryDebugPanel.section.uiStreamingMetrics': 'UI 串流指標',
   'memoryDebugPanel.section.vscodeBridgeMetrics': 'VS Code 橋接指標',
@@ -3011,6 +3012,16 @@ export const dict: Record<I18nKey, string> = {
   'memoryDebugPanel.streaming.copy.copied': '串流偵錯 JSON 已複製',
   'memoryDebugPanel.streaming.copy.failed': '複製 JSON 失敗',
   'memoryDebugPanel.streaming.copy.hint': '複製會匯出 UI 與 VS Code 的串流指標 JSON',
+  'memoryDebugPanel.requests.inFlight': '進行中',
+  'memoryDebugPanel.requests.peak': '峰值',
+  'memoryDebugPanel.requests.duration': '時長',
+  'memoryDebugPanel.requests.totalRequests': '請求總數',
+  'memoryDebugPanel.requests.tracking': '追蹤',
+  'memoryDebugPanel.requests.now': '目前',
+  'memoryDebugPanel.requests.noSamples': '尚未記錄請求。保持此面板開啟以記錄 fetch 活動。',
+  'memoryDebugPanel.requests.chartLabel': '隨時間變化的進行中 fetch 請求，峰值 {peak}',
+  'memoryDebugPanel.requests.windowHint': '最近 {seconds}秒',
+  'memoryDebugPanel.requests.percentileChartLabel': '進行中請求年齡百分位（p50、p90、p99、最大值）隨時間的變化',
   'memoryDebugPanel.common.idle': '閒置',
   'memoryDebugPanel.common.live': '即時',
   'memoryDebugPanel.common.notAvailable': '無',
diff --git a/packages/ui/src/stores/utils/requestsInFlight.ts b/packages/ui/src/stores/utils/requestsInFlight.ts
new file mode 100644
index 00000000..9b263f93
--- /dev/null
+++ b/packages/ui/src/stores/utils/requestsInFlight.ts
@@ -0,0 +1,314 @@
+// Tracks every fetch() request as "in flight" from call to promise settle,
+// samples two series once per second, and keeps a 5-minute rolling window for
+// plotting:
+//   1. in-flight request count
+//   2. percentile distribution of currently in-flight request ages: p50, p90,
+//      p99, max (ms since each unsettled fetch started; 0 when nothing is in
+//      flight)
+// Mirrors the streamDebug.ts pattern: collection is gated behind an
+// enable/disable toggle (driven by the debug panel), state lives on `window`
+// to survive HMR, and the UI polls a serializable snapshot instead of
+// subscribing to a store (this is high-frequency debug data, see stores docs).
+
+const STORAGE_KEY = 'openchamber_requests_in_flight';
+const SAMPLE_INTERVAL_MS = 1000;
+const WINDOW_MS = 5 * 60 * 1000;
+const MAX_SAMPLES = Math.ceil(WINDOW_MS / SAMPLE_INTERVAL_MS);
+
+type RequestsInFlightState = {
+    enabled: boolean;
+    startedAt: number;
+    inFlight: number;
+    peak: number;
+    totalStarted: number;
+    totalSettled: number;
+    samples: number[];
+    p50Samples: number[];
+    p90Samples: number[];
+    p99Samples: number[];
+    maxSamples: number[];
+    peakAgeMs: number;
+    inFlightStarts: Map<number, number>;
+    sampleCount: number;
+    lastSampleAt: number | null;
+    fetchWrapped: boolean;
+    originalFetch: typeof window.fetch | null;
+    sampleTimer: number | null;
+};
+
+export type RequestsInFlightSnapshot = {
+    enabled: boolean;
+    startedAt: number | null;
+    durationMs: number;
+    inFlight: number;
+    peak: number;
+    totalStarted: number;
+    totalSettled: number;
+    samples: number[];
+    ageP50: number;
+    ageP90: number;
+    ageP99: number;
+    ageMax: number;
+    peakAgeMs: number;
+    p50Samples: number[];
+    p90Samples: number[];
+    p99Samples: number[];
+    maxSamples: number[];
+    sampleCount: number;
+    lastSampleAt: number | null;
+    windowSeconds: number;
+};
+
+declare global {
+    interface Window {
+        __openchamberRequestsInFlight__?: RequestsInFlightState;
+    }
+}
+
+export const requestsInFlightEnabled = (): boolean => {
+    if (typeof window === 'undefined') return false;
+    try {
+        return window.localStorage.getItem(STORAGE_KEY) === '1';
+    } catch {
+        return false;
+    }
+};
+
+const createState = (): RequestsInFlightState => {
+    const startedAt = Date.now();
+    return {
+        enabled: true,
+        startedAt,
+        inFlight: 0,
+        peak: 0,
+        totalStarted: 0,
+        totalSettled: 0,
+        samples: [],
+        p50Samples: [],
+        p90Samples: [],
+        p99Samples: [],
+        maxSamples: [],
+        peakAgeMs: 0,
+        inFlightStarts: new Map<number, number>(),
+        sampleCount: 0,
+        lastSampleAt: null,
+        fetchWrapped: false,
+        originalFetch: null,
+        sampleTimer: null,
+    };
+};
+
+let nextRequestId = 1;
+
+const recordStart = (id: number, startMs: number): void => {
+    const state = window.__openchamberRequestsInFlight__;
+    if (!state || !state.enabled) return;
+    state.inFlight += 1;
+    state.totalStarted += 1;
+    if (state.inFlight > state.peak) state.peak = state.inFlight;
+    state.inFlightStarts.set(id, startMs);
+};
+
+const recordSettle = (id: number): void => {
+    const state = window.__openchamberRequestsInFlight__;
+    if (!state || !state.enabled) return;
+    state.inFlight = Math.max(0, state.inFlight - 1);
+    state.totalSettled += 1;
+    state.inFlightStarts.delete(id);
+};
+
+// Sorted ages (ms) of every currently in-flight request. Empty when nothing
+// is in flight. Used both for live snapshot reporting and per-second sampling.
+const currentAges = (state: RequestsInFlightState): number[] => {
+    if (state.inFlightStarts.size === 0) return [];
+    const now = Date.now();
+    const ages: number[] = [];
+    for (const start of state.inFlightStarts.values()) {
+        ages.push(Math.max(0, now - start));
+    }
+    ages.sort((a, b) => a - b);
+    return ages;
+};
+
+// Linear-interpolation percentile of a pre-sorted array.
+const percentile = (sorted: number[], p: number): number => {
+    const n = sorted.length;
+    if (n === 0) return 0;
+    if (n === 1) return sorted[0];
+    const rank = (p / 100) * (n - 1);
+    const lo = Math.floor(rank);
+    const hi = Math.ceil(rank);
+    if (lo === hi) return sorted[lo];
+    return sorted[lo] + (sorted[hi] - sorted[lo]) * (rank - lo);
+};
+
+const installFetchTracker = (): void => {
+    if (typeof window === 'undefined') return;
+    const state = window.__openchamberRequestsInFlight__;
+    if (!state || state.fetchWrapped) return;
+    const original = window.fetch.bind(window);
+    state.originalFetch = original;
+    state.fetchWrapped = true;
+    const tracker = async (input: RequestInfo | URL, init?: RequestInit): Promise<Response> => {
+        const id = nextRequestId++;
+        recordStart(id, Date.now());
+        try {
+            return await original(input, init);
+        } finally {
+            recordSettle(id);
+        }
+    };
+    window.fetch = tracker as typeof window.fetch;
+};
+
+const uninstallFetchTracker = (): void => {
+    if (typeof window === 'undefined') return;
+    const state = window.__openchamberRequestsInFlight__;
+    if (!state || !state.fetchWrapped || !state.originalFetch) return;
+    window.fetch = state.originalFetch;
+    state.fetchWrapped = false;
+    state.originalFetch = null;
+};
+
+const trimSamples = (arr: number[]): void => {
+    if (arr.length > MAX_SAMPLES) arr.splice(0, arr.length - MAX_SAMPLES);
+};
+
+const pushSample = (): void => {
+    const state = window.__openchamberRequestsInFlight__;
+    if (!state || !state.enabled) return;
+    state.samples.push(state.inFlight);
+    const ages = currentAges(state);
+    const mx = ages.length > 0 ? ages[ages.length - 1] : 0;
+    state.p50Samples.push(percentile(ages, 50));
+    state.p90Samples.push(percentile(ages, 90));
+    state.p99Samples.push(percentile(ages, 99));
+    state.maxSamples.push(mx);
+    if (mx > state.peakAgeMs) state.peakAgeMs = mx;
+    state.sampleCount += 1;
+    trimSamples(state.samples);
+    trimSamples(state.p50Samples);
+    trimSamples(state.p90Samples);
+    trimSamples(state.p99Samples);
+    trimSamples(state.maxSamples);
+    state.lastSampleAt = Date.now();
+};
+
+const startSampling = (): void => {
+    if (typeof window === 'undefined') return;
+    const state = window.__openchamberRequestsInFlight__;
+    if (!state || state.sampleTimer != null) return;
+    state.sampleTimer = window.setInterval(pushSample, SAMPLE_INTERVAL_MS);
+};
+
+const stopSampling = (): void => {
+    if (typeof window === 'undefined') return;
+    const state = window.__openchamberRequestsInFlight__;
+    if (!state || state.sampleTimer == null) return;
+    window.clearInterval(state.sampleTimer);
+    state.sampleTimer = null;
+};
+
+export const setRequestsInFlightTrackingEnabled = (enabled: boolean): void => {
+    if (typeof window === 'undefined') return;
+
+    try {
+        if (enabled) {
+            // Idempotent: tear down any prior tracking first so a repeated
+            // enable can never wrap window.fetch twice (which would double-count).
+            stopSampling();
+            uninstallFetchTracker();
+            window.localStorage.setItem(STORAGE_KEY, '1');
+            window.__openchamberRequestsInFlight__ = createState();
+            installFetchTracker();
+            startSampling();
+            return;
+        }
+
+        window.localStorage.removeItem(STORAGE_KEY);
+        stopSampling();
+        uninstallFetchTracker();
+        delete window.__openchamberRequestsInFlight__;
+    } catch {
+        // ignore storage failures in debug helper
+    }
+};
+
+export const resetRequestsInFlight = (): void => {
+    if (typeof window === 'undefined') return;
+    const state = window.__openchamberRequestsInFlight__;
+    if (!state) return;
+    const fresh = createState();
+    state.startedAt = fresh.startedAt;
+    state.inFlight = fresh.inFlight;
+    state.peak = fresh.peak;
+    state.totalStarted = fresh.totalStarted;
+    state.totalSettled = fresh.totalSettled;
+    state.samples = fresh.samples;
+    state.p50Samples = fresh.p50Samples;
+    state.p90Samples = fresh.p90Samples;
+    state.p99Samples = fresh.p99Samples;
+    state.maxSamples = fresh.maxSamples;
+    state.peakAgeMs = fresh.peakAgeMs;
+    state.inFlightStarts = fresh.inFlightStarts;
+    state.sampleCount = fresh.sampleCount;
+    state.lastSampleAt = fresh.lastSampleAt;
+};
+
+export const getRequestsInFlightSnapshot = (): RequestsInFlightSnapshot => {
+    if (typeof window === 'undefined') {
+        return emptySnapshot();
+    }
+
+    const state = window.__openchamberRequestsInFlight__;
+    if (!requestsInFlightEnabled() || !state) {
+        return emptySnapshot();
+    }
+
+    const ages = currentAges(state);
+    return {
+        enabled: true,
+        startedAt: state.startedAt,
+        durationMs: Math.max(0, Date.now() - state.startedAt),
+        inFlight: state.inFlight,
+        peak: state.peak,
+        totalStarted: state.totalStarted,
+        totalSettled: state.totalSettled,
+        samples: state.samples.slice(),
+        ageP50: percentile(ages, 50),
+        ageP90: percentile(ages, 90),
+        ageP99: percentile(ages, 99),
+        ageMax: ages.length > 0 ? ages[ages.length - 1] : 0,
+        peakAgeMs: state.peakAgeMs,
+        p50Samples: state.p50Samples.slice(),
+        p90Samples: state.p90Samples.slice(),
+        p99Samples: state.p99Samples.slice(),
+        maxSamples: state.maxSamples.slice(),
+        sampleCount: state.sampleCount,
+        lastSampleAt: state.lastSampleAt,
+        windowSeconds: MAX_SAMPLES,
+    };
+};
+
+const emptySnapshot = (): RequestsInFlightSnapshot => ({
+    enabled: false,
+    startedAt: null,
+    durationMs: 0,
+    inFlight: 0,
+    peak: 0,
+    totalStarted: 0,
+    totalSettled: 0,
+    samples: [],
+    ageP50: 0,
+    ageP90: 0,
+    ageP99: 0,
+    ageMax: 0,
+    peakAgeMs: 0,
+    p50Samples: [],
+    p90Samples: [],
+    p99Samples: [],
+    maxSamples: [],
+    sampleCount: 0,
+    lastSampleAt: null,
+    windowSeconds: MAX_SAMPLES,
+});