diff --git a/tools/src/hwlab-cli/trace-renderer.ts b/tools/src/hwlab-cli/trace-renderer.ts
index cb6607ec..f0a01490 100644
--- a/tools/src/hwlab-cli/trace-renderer.ts
+++ b/tools/src/hwlab-cli/trace-renderer.ts
@@ -76,7 +76,10 @@ export function traceDisplayRows(trace: Record<string, unknown> = {}, events: Tr
     if (lastAssistantRow) rows[lastAssistantRowIndex] = markAssistantRowTerminal(trace, lastAssistantRow, completionEvent);
     else rows.push(traceCompletionSummaryRow(trace, completionEvent));
   }
-  return rows.length > 0 ? rows : events.map((event) => traceDisplayRow(trace, event));
+  if (rows.length > 0) return rows;
+  if (events.length === 0) return [];
+  if (traceNoiseEventCount(events) === events.length) return [traceNoiseSummaryRow(trace, events)];
+  return events.filter((event) => !isNoisyTraceEvent(event)).map((event) => traceDisplayRow(trace, event));
 }
 
 export function renderTraceRowsMarkdown(rows: TraceEventRow[] = []): string {
@@ -350,6 +353,20 @@ function traceCompletionSummaryRow(trace: Record<string, unknown>, event: TraceE
   };
 }
 
+function traceNoiseSummaryRow(trace: Record<string, unknown>, events: TraceEvent[]): TraceEventRow {
+  const lastEvent = events.at(-1);
+  const status = nonEmptyString(trace.status ?? trace.traceStatus ?? lastEvent?.status) ?? "running";
+  const lastLabel = lastEvent ? readableTraceLabel(lastEvent) : "未观测";
+  return {
+    rowId: "trace-noise-summary",
+    seq: numberOrNull(lastEvent?.seq),
+    tone: lastEvent ? traceEventTone(lastEvent) : "source",
+    header: `${traceClock(lastEvent?.createdAt)}  Trace ${status}，等待可读事件`,
+    body: `已隐藏 ${events.length} 条 AgentRun backend 状态事件。最新原始事件：${lastLabel}。`,
+    bodyFormat: "text"
+  };
+}
+
 function traceDisplayRow(trace: Record<string, unknown>, event: TraceEvent): TraceEventRow {
   const label = readableTraceLabel(event);
   return {
diff --git a/web/hwlab-cloud-web/scripts/workbench-r1-parity.test.ts b/web/hwlab-cloud-web/scripts/workbench-r1-parity.test.ts
index 0dd95ee6..048639b2 100644
--- a/web/hwlab-cloud-web/scripts/workbench-r1-parity.test.ts
+++ b/web/hwlab-cloud-web/scripts/workbench-r1-parity.test.ts
@@ -3,6 +3,7 @@ import test from "node:test";
 
 import type { AgentRunProvenance, ChatMessage, TraceEvent } from "../src/types/index.ts";
 import { canCancelMessage, canReplayTrace, canRetryMessage, messageTraceId, renderSafeMarkdown, traceEventBody, traceEventLabel, traceIdentityText, visibleTraceEvents } from "../src/components/workbench/message-rendering.ts";
+import { traceDisplayRows, traceNoiseEventCount } from "../../../tools/src/hwlab-cli/trace-renderer.ts";
 
 test("R1 markdown rendering keeps structure and strips unsafe HTML", () => {
   const html = renderSafeMarkdown("# 标题\n\n- 项目\n\n<script>alert('x')</script>\n\n[link](https://example.com)");
@@ -48,6 +49,20 @@ test("R1 trace rendering hides chunk noise without dropping meaningful events",
   assert.equal(visibleTraceEvents(events, false).length, 3);
 });
 
+test("R1 shared trace renderer collapses pure AgentRun backend noise", () => {
+  const events = Array.from({ length: 12 }, (_, index) => ({
+    label: index % 3 === 0 ? "agentrun:backend:run-created" : index % 3 === 1 ? "agentrun:backend:command-created" : "agentrun:backend:runner-job-created",
+    status: "running",
+    createdAt: "2026-06-15T02:00:00.000Z"
+  }));
+  const rows = traceDisplayRows({ traceId: "trc_noise", status: "running" }, events);
+  assert.equal(traceNoiseEventCount(events), 12);
+  assert.equal(rows.length, 1);
+  assert.equal(rows[0]?.rowId, "trace-noise-summary");
+  assert.match(rows[0]?.body ?? "", /已隐藏 12 条 AgentRun backend 状态事件/u);
+  assert.doesNotMatch(rows[0]?.body ?? "", /run-created\ncommand-created/u);
+});
+
 test("R1 status summary keeps the restored 23-row floor", () => {
   const message = agentMessage({
     status: "failed",
diff --git a/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue b/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue
index 17882873..9ceaeb39 100644
--- a/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue
+++ b/web/hwlab-cloud-web/src/components/agent/TraceTimeline.vue
@@ -3,21 +3,35 @@ import { computed, nextTick, ref, watch } from "vue";
 import type { RunnerTrace, TraceEvent } from "@/types";
 import { isTerminalStatus } from "@/composables/useTraceSubscription";
 import { firstNonEmptyString } from "@/utils";
-import { traceEventBody, traceEventLabel, traceEventMeta, visibleTraceEvents } from "@/components/workbench/message-rendering";
+import MessageMarkdown from "@/components/workbench/MessageMarkdown.vue";
+import { traceEventBody, traceEventLabel, traceEventMeta } from "@/components/workbench/message-rendering";
+import { traceDisplayRows, traceNoiseEventCount, type TraceEventRow } from "../../../../../tools/src/hwlab-cli/trace-renderer.ts";
 
 const props = defineProps<{ trace?: RunnerTrace | null; defaultExpanded?: boolean; storageKey?: string }>();
 
 const listRef = ref<HTMLOListElement | null>(null);
 const following = ref(true);
 const expanded = ref(false);
-const compact = ref(true);
+const rawMode = ref(false);
 
 const events = computed(() => Array.isArray(props.trace?.events) ? props.trace.events : []);
 const eventCount = computed(() => props.trace?.eventCount ?? events.value.length);
-const visibleEvents = computed(() => visibleTraceEvents(events.value, compact.value));
-const noiseCount = computed(() => Math.max(0, events.value.length - visibleEvents.value.length));
+const readableRows = computed(() => traceDisplayRows(traceRecord(props.trace), events.value as Record<string, unknown>[]));
+const noiseCount = computed(() => traceNoiseEventCount(events.value as Record<string, unknown>[]));
 const lastEvent = computed(() => events.value.at(-1) ?? null);
-const lastEventLabel = computed(() => firstNonEmptyString(props.trace?.lastEventLabel, lastEvent.value?.label, lastEvent.value?.type, lastEvent.value?.kind) ?? "未观测");
+const lastReadableRow = computed(() => readableRows.value.at(-1) ?? null);
+const lastEventLabel = computed(() => firstNonEmptyString(lastReadableRow.value?.header, props.trace?.lastEventLabel, lastEvent.value?.label, lastEvent.value?.type, lastEvent.value?.kind) ?? "未观测");
+const summaryItems = computed(() => {
+  const agentRun = recordValue(props.trace?.agentRun);
+  return [
+    { label: "status", value: firstNonEmptyString(props.trace?.status, props.trace?.traceStatus) },
+    { label: "session", value: props.trace?.sessionId },
+    { label: "thread", value: props.trace?.threadId },
+    { label: "run", value: firstNonEmptyString(agentRun?.runId, props.trace?.runId) },
+    { label: "command", value: firstNonEmptyString(agentRun?.commandId, props.trace?.commandId) },
+    { label: "waiting", value: props.trace?.waitingFor }
+  ].filter((item): item is { label: string; value: string } => Boolean(item.value));
+});
 
 watch(() => [eventCount.value, props.trace?.status, following.value, expanded.value], async () => {
   if (!following.value || !expanded.value) return;
@@ -50,6 +64,18 @@ function eventKey(event: TraceEvent, index: number): string {
   return `${event.ts ?? "no-ts"}-${event.label ?? event.type ?? event.kind ?? "event"}-${index}`;
 }
 
+function rowKey(row: TraceEventRow, index: number): string {
+  return `${row.rowId}-${row.seq ?? "no-seq"}-${index}`;
+}
+
+function traceRecord(trace: RunnerTrace | null | undefined): Record<string, unknown> {
+  return trace && typeof trace === "object" ? trace as Record<string, unknown> : {};
+}
+
+function recordValue(value: unknown): Record<string, unknown> | null {
+  return value && typeof value === "object" ? value as Record<string, unknown> : null;
+}
+
 </script>
 
 <template>
@@ -58,21 +84,31 @@ function eventKey(event: TraceEvent, index: number): string {
       <button class="trace-toggle" type="button" @click="expanded = !expanded">{{ expanded ? "收起" : "展开" }}</button>
       <strong>Trace</strong>
       <span class="trace-id">{{ trace.traceId || "pending" }}</span>
-      <small>{{ visibleEvents.length }}/{{ eventCount }} events</small>
+      <small>{{ readableRows.length }} readable / {{ eventCount }} events</small>
+      <small v-if="noiseCount > 0">hidden={{ noiseCount }}</small>
       <small>last={{ lastEventLabel }}</small>
       <button class="btn btn-secondary btn-sm" type="button" @click="following = !following">{{ following ? "跟随" : "暂停" }}</button>
       <button class="btn btn-secondary btn-sm" type="button" @click="jumpToBottom">到底部</button>
-      <button class="btn btn-secondary btn-sm" type="button" @click="compact = !compact">{{ compact ? "显示全部" : "低噪声" }}</button>
+      <button class="btn btn-secondary btn-sm" type="button" @click="rawMode = !rawMode">{{ rawMode ? "可读视图" : "原始事件" }}</button>
     </header>
+    <div v-if="summaryItems.length > 0" class="trace-summary-strip" aria-label="Trace identity summary">
+      <span v-for="item in summaryItems" :key="item.label" class="trace-summary-chip"><b>{{ item.label }}</b>{{ item.value }}</span>
+    </div>
     <p v-if="trace.eventsCompacted" class="trace-warning">当前 result 返回被压缩，已通过 trace replay 入口请求完整事件；完成前不要把压缩窗口当完整 trace。</p>
-    <p v-if="noiseCount > 0 && compact" class="trace-warning">已聚合隐藏 {{ noiseCount }} 条 chunk/delta/token 噪声事件。</p>
+    <p v-if="noiseCount > 0 && !rawMode" class="trace-warning">已按共享 trace renderer 聚合隐藏 {{ noiseCount }} 条 backend/chunk/token 噪声事件；需要审计原始 payload 时可切换到原始事件。</p>
     <ol v-show="expanded" ref="listRef" @scroll="onScroll">
-      <li v-for="(event, index) in visibleEvents" :key="eventKey(event, index)" :data-event-status="event.status || 'source'">
+      <li v-for="(row, index) in readableRows" v-if="!rawMode" :key="rowKey(row, index)" class="trace-render-row" :data-event-status="row.tone" :data-terminal="row.terminal ? 'true' : 'false'">
+        <code>{{ row.header }}</code>
+        <MessageMarkdown v-if="row.body && row.bodyFormat === 'markdown'" class="trace-row-body trace-row-markdown" :source="row.body" />
+        <pre v-else-if="row.body" class="trace-row-body">{{ row.body }}</pre>
+        <span v-else class="trace-row-body muted">已记录</span>
+      </li>
+      <li v-for="(event, index) in events" v-else :key="eventKey(event, index)" class="trace-raw-row" :data-event-status="event.status || 'source'">
         <code>{{ traceEventLabel(event) }}</code>
         <span>{{ traceEventBody(event) }}</span>
         <small v-if="traceEventMeta(event)">{{ traceEventMeta(event) }}</small>
       </li>
     </ol>
-    <p v-if="expanded && visibleEvents.length === 0" class="trace-empty">trace={{ trace.traceId || "pending" }}；等待后端事件。</p>
+    <p v-if="expanded && readableRows.length === 0 && !rawMode" class="trace-empty">trace={{ trace.traceId || "pending" }}；等待后端事件。</p>
   </section>
 </template>
diff --git a/web/hwlab-cloud-web/src/styles/workbench.css b/web/hwlab-cloud-web/src/styles/workbench.css
index ad79dd44..f43ff79c 100644
--- a/web/hwlab-cloud-web/src/styles/workbench.css
+++ b/web/hwlab-cloud-web/src/styles/workbench.css
@@ -752,6 +752,33 @@
   flex-wrap: wrap;
 }
 
+.trace-summary-strip {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+}
+
+.trace-summary-chip {
+  display: inline-flex;
+  min-width: 0;
+  max-width: 100%;
+  align-items: center;
+  gap: 6px;
+  border: 1px solid #d8e1eb;
+  border-radius: 8px;
+  background: white;
+  color: #334155;
+  padding: 5px 8px;
+  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
+  font-size: 11px;
+}
+
+.trace-summary-chip b {
+  color: #64748b;
+  font-family: inherit;
+  text-transform: uppercase;
+}
+
 .trace-toolbar strong,
 .trace-id {
   min-width: 0;
@@ -811,12 +838,46 @@
 
 .trace-timeline li {
   display: grid;
-  grid-template-columns: minmax(96px, 160px) minmax(0, 1fr) auto;
+  grid-template-columns: minmax(180px, 280px) minmax(0, 1fr) auto;
   gap: 8px;
   color: #475569;
   font-size: 12px;
 }
 
+.trace-timeline li[data-terminal="true"] {
+  border-left: 3px solid #22c55e;
+  padding-left: 8px;
+}
+
+.trace-render-row .trace-row-body {
+  min-width: 0;
+  margin: 0;
+  white-space: pre-wrap;
+}
+
+.trace-render-row .trace-row-markdown {
+  display: grid;
+  gap: 6px;
+  white-space: normal;
+}
+
+.trace-render-row .muted {
+  color: #94a3b8;
+}
+
+.trace-render-row pre.trace-row-body {
+  max-height: 120px;
+  overflow: auto;
+  border: 1px solid #d8e1eb;
+  border-radius: 8px;
+  background: white;
+  color: #334155;
+  padding: 8px;
+  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
+  font-size: 11px;
+  line-height: 1.45;
+}
+
 .trace-timeline li span,
 .trace-timeline li small {
   min-width: 0;