diff --git a/mateclaw-ui/src/components/chat/RunOverviewPanel.vue b/mateclaw-ui/src/components/chat/RunOverviewPanel.vue
new file mode 100644
index 00000000..a8af62e3
--- /dev/null
+++ b/mateclaw-ui/src/components/chat/RunOverviewPanel.vue
@@ -0,0 +1,275 @@
+<script setup lang="ts">
+import { ref, computed } from 'vue'
+import { Connection, Loading, Select, CloseBold, WarningFilled, Clock, ArrowDown, Expand, Fold } from '@element-plus/icons-vue'
+import { useToolLabel } from '@/composables/useToolLabel'
+import type { Message, MessageSegment, DelegationNode, PlanMeta } from '@/types'
+import PlanStepsPanel from './PlanStepsPanel.vue'
+import DelegationNodeView from './DelegationNodeView.vue'
+
+/**
+ * Always-on "run overview" rail mounted beside the chat thread. It surfaces the
+ * data the agent already streams — the execution plan and the live sub-agent
+ * delegation tree — so long-running tasks can be tracked without scrolling back
+ * through the message history.
+ *
+ * Purely derived from the reactive chat messages: the plan lives on the latest
+ * assistant message's metadata, and each delegation timeline segment becomes a
+ * top-level node in the sub-agent tree. No extra API calls — the sub-agent
+ * REST surface is admin-gated, but the same state arrives over the chat stream.
+ */
+const props = defineProps<{
+  messages: Message[]
+  isGenerating: boolean
+}>()
+
+const { getToolLabel } = useToolLabel()
+
+const collapsed = ref(false)
+
+/** The most recent assistant message — the turn whose progress we track. */
+const latestAssistant = computed<Message | undefined>(() => {
+  for (let i = props.messages.length - 1; i >= 0; i--) {
+    if (props.messages[i].role === 'assistant') return props.messages[i]
+  }
+  return undefined
+})
+
+const currentPlan = computed<PlanMeta | undefined>(() => latestAssistant.value?.metadata?.plan)
+
+/** Delegation segments carry a "→" tool-name prefix injected upstream. */
+function isDelegationSegment(seg: MessageSegment): boolean {
+  return seg.type === 'tool_call' && (seg.toolName || '').startsWith('→')
+}
+
+function toNode(seg: MessageSegment): DelegationNode {
+  const raw = (seg.toolName || '').replace(/^→\s*/, '').trim()
+  const status: DelegationNode['status'] =
+    seg.status === 'error' ? 'error' : seg.status === 'completed' ? 'completed' : 'running'
+  return {
+    subagentId: seg.subagentId || seg.id,
+    agentName: getToolLabel(raw) || raw,
+    status,
+    depth: 1,
+    task: seg.toolArgs,
+    plan: seg.childTimeline?.plan,
+    tools: seg.childTimeline?.tools,
+    result: seg.toolResult,
+    stale: seg.delegationStale,
+    async: seg.delegationAsync,
+    children: seg.childTimeline?.children || [],
+  }
+}
+
+const subagentNodes = computed<DelegationNode[]>(() =>
+  (latestAssistant.value?.metadata?.segments || []).filter(isDelegationSegment).map(toNode)
+)
+
+const runningSubagents = computed(() => subagentNodes.value.filter(n => n.status === 'running').length)
+
+const planProgress = computed(() => {
+  const p = currentPlan.value
+  if (!p?.steps?.length) return ''
+  const done = p.stepResults?.filter(r => r?.status === 'completed').length || 0
+  return `${done}/${p.steps.length}`
+})
+
+const hasContent = computed(() => !!currentPlan.value || subagentNodes.value.length > 0)
+</script>
+
+<template>
+  <aside
+    v-if="hasContent"
+    class="run-overview"
+    :class="{ 'is-collapsed': collapsed }"
+  >
+    <!-- Collapsed rail: badges only -->
+    <button
+      v-if="collapsed"
+      class="run-overview__rail"
+      :title="$t('chat.runOverview.expand')"
+      @click="collapsed = false"
+    >
+      <el-icon :size="16"><Expand /></el-icon>
+      <span v-if="planProgress" class="run-overview__rail-badge">{{ planProgress }}</span>
+      <span v-if="subagentNodes.length" class="run-overview__rail-badge is-sub">
+        <el-icon :size="12"><Connection /></el-icon>{{ subagentNodes.length }}
+      </span>
+    </button>
+
+    <template v-else>
+      <header class="run-overview__header">
+        <span class="run-overview__title">{{ $t('chat.runOverview.title') }}</span>
+        <el-icon
+          v-if="isGenerating"
+          class="run-overview__live is-loading"
+          :title="$t('chat.runOverview.running')"
+          :size="13"
+        ><Loading /></el-icon>
+        <button
+          class="run-overview__collapse"
+          :title="$t('chat.runOverview.collapse')"
+          @click="collapsed = true"
+        ><el-icon :size="15"><Fold /></el-icon></button>
+      </header>
+
+      <div class="run-overview__body">
+        <!-- Plan progress -->
+        <section class="run-overview__section">
+          <div class="run-overview__section-title">{{ $t('chat.runOverview.plan') }}</div>
+          <PlanStepsPanel
+            v-if="currentPlan"
+            :plan="currentPlan"
+            :is-generating="isGenerating"
+          />
+          <p v-else class="run-overview__empty">{{ $t('chat.runOverview.noPlan') }}</p>
+        </section>
+
+        <!-- Sub-agents -->
+        <section class="run-overview__section">
+          <div class="run-overview__section-title">
+            {{ $t('chat.runOverview.subagents') }}
+            <span v-if="runningSubagents" class="run-overview__count">
+              {{ runningSubagents }} {{ $t('chat.runOverview.running') }}
+            </span>
+          </div>
+          <div v-if="subagentNodes.length" class="run-overview__subagents">
+            <DelegationNodeView
+              v-for="node in subagentNodes"
+              :key="node.subagentId"
+              :node="node"
+            />
+          </div>
+          <p v-else class="run-overview__empty">{{ $t('chat.runOverview.noSubagents') }}</p>
+        </section>
+      </div>
+    </template>
+  </aside>
+</template>
+
+<style scoped>
+.run-overview {
+  width: 320px;
+  flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+  border-left: 1px solid var(--mc-border-light);
+  background: var(--mc-bg-muted, #f9f7f5);
+  overflow: hidden;
+  min-height: 0;
+  transition: width 0.2s ease;
+}
+.run-overview.is-collapsed {
+  width: 44px;
+}
+
+.run-overview__rail {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 8px;
+  padding: 10px 0;
+  width: 100%;
+  border: none;
+  background: transparent;
+  cursor: pointer;
+  color: var(--mc-text-tertiary);
+}
+.run-overview__rail:hover {
+  color: var(--mc-primary);
+}
+.run-overview__rail-badge {
+  display: inline-flex;
+  align-items: center;
+  gap: 2px;
+  font-size: 11px;
+  font-weight: 600;
+  color: var(--mc-text-secondary);
+  background: var(--mc-bg-sunken, #f3f0ed);
+  border: 1px solid var(--mc-border-light);
+  border-radius: 10px;
+  padding: 1px 6px;
+}
+.run-overview__rail-badge.is-sub {
+  color: var(--mc-primary);
+}
+
+.run-overview__header {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  padding: 10px 12px;
+  border-bottom: 1px solid var(--mc-border-light);
+  flex-shrink: 0;
+}
+.run-overview__title {
+  font-weight: 600;
+  font-size: 13px;
+  color: var(--mc-text-primary);
+}
+.run-overview__live {
+  color: var(--mc-primary);
+}
+.run-overview__collapse {
+  margin-left: auto;
+  border: none;
+  background: transparent;
+  cursor: pointer;
+  color: var(--mc-text-tertiary);
+  display: flex;
+  align-items: center;
+  padding: 2px;
+  border-radius: 4px;
+}
+.run-overview__collapse:hover {
+  color: var(--mc-text-primary);
+  background: var(--mc-bg-hover, #f0ece8);
+}
+
+.run-overview__body {
+  flex: 1;
+  overflow-y: auto;
+  padding: 8px 12px 16px;
+  min-height: 0;
+}
+
+.run-overview__section + .run-overview__section {
+  margin-top: 14px;
+}
+.run-overview__section-title {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--mc-text-tertiary);
+  text-transform: uppercase;
+  letter-spacing: 0.03em;
+  margin-bottom: 6px;
+}
+.run-overview__count {
+  font-weight: 500;
+  text-transform: none;
+  letter-spacing: 0;
+  color: var(--mc-primary);
+}
+
+.run-overview__empty {
+  margin: 0;
+  padding: 10px 0;
+  font-size: 12px;
+  color: var(--mc-text-quaternary, #c0bfbc);
+  text-align: center;
+}
+
+.run-overview__subagents {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+@media (max-width: 1280px) {
+  .run-overview {
+    display: none;
+  }
+}
+</style>
diff --git a/mateclaw-ui/src/i18n/locales/en-US.ts b/mateclaw-ui/src/i18n/locales/en-US.ts
index c5ed6e98..17af8966 100644
--- a/mateclaw-ui/src/i18n/locales/en-US.ts
+++ b/mateclaw-ui/src/i18n/locales/en-US.ts
@@ -97,6 +97,16 @@ export default {
     subagentAsync: 'Running in background — result via task_output',
     executionPlan: 'Execution Plan',
     planDone: 'done',
+    runOverview: {
+      title: 'Run Overview',
+      plan: 'Plan Progress',
+      subagents: 'Sub-agents',
+      noPlan: 'No execution plan yet',
+      noSubagents: 'No sub-agents yet',
+      collapse: 'Collapse',
+      expand: 'Expand',
+      running: 'running',
+    },
     detail: {
       viewDetail: 'View details',
       request: 'Request',
diff --git a/mateclaw-ui/src/i18n/locales/zh-CN.ts b/mateclaw-ui/src/i18n/locales/zh-CN.ts
index 85ff93fe..389bae04 100644
--- a/mateclaw-ui/src/i18n/locales/zh-CN.ts
+++ b/mateclaw-ui/src/i18n/locales/zh-CN.ts
@@ -97,6 +97,16 @@ export default {
     subagentAsync: '后台运行中，结果稍后获取',
     executionPlan: '执行计划',
     planDone: '已完成',
+    runOverview: {
+      title: '运行总览',
+      plan: '计划进度',
+      subagents: '子 Agent',
+      noPlan: '暂无执行计划',
+      noSubagents: '暂无子 Agent',
+      collapse: '收起总览',
+      expand: '展开总览',
+      running: '运行中',
+    },
     detail: {
       viewDetail: '查看详情',
       request: '请求参数',
diff --git a/mateclaw-ui/src/views/ChatConsole.vue b/mateclaw-ui/src/views/ChatConsole.vue
index 823cc723..83dbafcd 100644
--- a/mateclaw-ui/src/views/ChatConsole.vue
+++ b/mateclaw-ui/src/views/ChatConsole.vue
@@ -243,6 +243,12 @@
       />
     </div>
 
+        <!-- 运行总览侧栏：计划进度 + 子 Agent 实时状态 -->
+        <RunOverviewPanel
+          :messages="messages"
+          :is-generating="isGenerating"
+        />
+
         <!-- Talk Mode 覆盖层 -->
         <TalkMode
           v-if="showTalkMode"
@@ -268,6 +274,7 @@ import { copyToClipboard } from '@/utils/clipboard'
 import { useFileDrop } from '@/composables/useFileDrop'
 import { useIsMobile, useMediaQuery, BREAKPOINTS } from '@/composables/useBreakpoint'
 import { useChat } from '@/composables/chat/useChat'
+import RunOverviewPanel from '@/components/chat/RunOverviewPanel.vue'
 import { reconstructErrorInfo } from '@/types/chatError'
 import { reconcileMessages, extractMessages } from '@/utils/messageReconcile'
 import type { Conversation, Agent, ModelConfig, ProviderInfo, ActiveModelsInfo, ChatAttachment, MessageContentPart, Message, ToolCallMeta, StreamPhase } from '@/types'