diff --git a/frontend/src/views/admin/ops/components/OpsAlertRulesCard.vue b/frontend/src/views/admin/ops/components/OpsAlertRulesCard.vue
index bc6d4948..11c24162 100644
--- a/frontend/src/views/admin/ops/components/OpsAlertRulesCard.vue
+++ b/frontend/src/views/admin/ops/components/OpsAlertRulesCard.vue
@@ -5,6 +5,7 @@ import { useAppStore } from '@/stores/app'
 import BaseDialog from '@/components/common/BaseDialog.vue'
 import ConfirmDialog from '@/components/common/ConfirmDialog.vue'
 import Select, { type SelectOption } from '@/components/common/Select.vue'
+import { adminAPI } from '@/api'
 import { opsAPI } from '@/api/admin/ops'
 import type { AlertRule, MetricType, Operator } from '../types'
 import type { OpsSeverity } from '@/api/admin/ops'
@@ -31,6 +32,7 @@ async function load() {
 
 onMounted(() => {
   load()
+  loadGroups()
 })
 
 const sortedRules = computed(() => {
@@ -44,29 +46,214 @@ const draft = ref<AlertRule | null>(null)
 
 type MetricGroup = 'system' | 'group' | 'account'
 
+interface MetricDefinition {
+  type: MetricType
+  group: MetricGroup
+  label: string
+  description: string
+  recommendedOperator: Operator
+  recommendedThreshold: number
+  unit?: string
+}
+
+const groupMetricTypes = new Set<MetricType>([
+  'group_available_accounts',
+  'group_available_ratio',
+  'group_rate_limit_ratio'
+])
+
+function parsePositiveInt(value: unknown): number | null {
+  if (value == null) return null
+  if (typeof value === 'boolean') return null
+  const n = typeof value === 'number' ? value : Number.parseInt(String(value), 10)
+  return Number.isFinite(n) && n > 0 ? n : null
+}
+
+const groupOptionsBase = ref<SelectOption[]>([])
+
+async function loadGroups() {
+  try {
+    const list = await adminAPI.groups.getAll()
+    groupOptionsBase.value = list.map((g) => ({ value: g.id, label: g.name }))
+  } catch (err) {
+    console.error('[OpsAlertRulesCard] Failed to load groups', err)
+    groupOptionsBase.value = []
+  }
+}
+
+const isGroupMetricSelected = computed(() => {
+  const metricType = draft.value?.metric_type
+  return metricType ? groupMetricTypes.has(metricType) : false
+})
+
+const draftGroupId = computed<number | null>({
+  get() {
+    return parsePositiveInt(draft.value?.filters?.group_id)
+  },
+  set(value) {
+    if (!draft.value) return
+    if (value == null) {
+      if (!draft.value.filters) return
+      delete draft.value.filters.group_id
+      if (Object.keys(draft.value.filters).length === 0) {
+        delete draft.value.filters
+      }
+      return
+    }
+    if (!draft.value.filters) draft.value.filters = {}
+    draft.value.filters.group_id = value
+  }
+})
+
+const groupOptions = computed<SelectOption[]>(() => {
+  if (isGroupMetricSelected.value) return groupOptionsBase.value
+  return [{ value: null, label: t('admin.ops.alertRules.form.allGroups') }, ...groupOptionsBase.value]
+})
+
 const metricDefinitions = computed(() => {
   return [
     // System-level metrics
-    { type: 'success_rate' as MetricType, group: 'system' as const, label: t('admin.ops.alertRules.metrics.successRate') },
-    { type: 'error_rate' as MetricType, group: 'system' as const, label: t('admin.ops.alertRules.metrics.errorRate') },
-    { type: 'upstream_error_rate' as MetricType, group: 'system' as const, label: t('admin.ops.alertRules.metrics.upstreamErrorRate') },
-    { type: 'p95_latency_ms' as MetricType, group: 'system' as const, label: t('admin.ops.alertRules.metrics.p95') },
-    { type: 'p99_latency_ms' as MetricType, group: 'system' as const, label: t('admin.ops.alertRules.metrics.p99') },
-    { type: 'cpu_usage_percent' as MetricType, group: 'system' as const, label: t('admin.ops.alertRules.metrics.cpu') },
-    { type: 'memory_usage_percent' as MetricType, group: 'system' as const, label: t('admin.ops.alertRules.metrics.memory') },
-    { type: 'concurrency_queue_depth' as MetricType, group: 'system' as const, label: t('admin.ops.alertRules.metrics.queueDepth') },
+    {
+      type: 'success_rate',
+      group: 'system',
+      label: t('admin.ops.alertRules.metrics.successRate'),
+      description: t('admin.ops.alertRules.metricDescriptions.successRate'),
+      recommendedOperator: '<',
+      recommendedThreshold: 99,
+      unit: '%'
+    },
+    {
+      type: 'error_rate',
+      group: 'system',
+      label: t('admin.ops.alertRules.metrics.errorRate'),
+      description: t('admin.ops.alertRules.metricDescriptions.errorRate'),
+      recommendedOperator: '>',
+      recommendedThreshold: 1,
+      unit: '%'
+    },
+    {
+      type: 'upstream_error_rate',
+      group: 'system',
+      label: t('admin.ops.alertRules.metrics.upstreamErrorRate'),
+      description: t('admin.ops.alertRules.metricDescriptions.upstreamErrorRate'),
+      recommendedOperator: '>',
+      recommendedThreshold: 1,
+      unit: '%'
+    },
+    {
+      type: 'p95_latency_ms',
+      group: 'system',
+      label: t('admin.ops.alertRules.metrics.p95'),
+      description: t('admin.ops.alertRules.metricDescriptions.p95'),
+      recommendedOperator: '>',
+      recommendedThreshold: 1000,
+      unit: 'ms'
+    },
+    {
+      type: 'p99_latency_ms',
+      group: 'system',
+      label: t('admin.ops.alertRules.metrics.p99'),
+      description: t('admin.ops.alertRules.metricDescriptions.p99'),
+      recommendedOperator: '>',
+      recommendedThreshold: 2000,
+      unit: 'ms'
+    },
+    {
+      type: 'cpu_usage_percent',
+      group: 'system',
+      label: t('admin.ops.alertRules.metrics.cpu'),
+      description: t('admin.ops.alertRules.metricDescriptions.cpu'),
+      recommendedOperator: '>',
+      recommendedThreshold: 80,
+      unit: '%'
+    },
+    {
+      type: 'memory_usage_percent',
+      group: 'system',
+      label: t('admin.ops.alertRules.metrics.memory'),
+      description: t('admin.ops.alertRules.metricDescriptions.memory'),
+      recommendedOperator: '>',
+      recommendedThreshold: 80,
+      unit: '%'
+    },
+    {
+      type: 'concurrency_queue_depth',
+      group: 'system',
+      label: t('admin.ops.alertRules.metrics.queueDepth'),
+      description: t('admin.ops.alertRules.metricDescriptions.queueDepth'),
+      recommendedOperator: '>',
+      recommendedThreshold: 10
+    },
 
     // Group-level metrics (requires group_id filter)
-    { type: 'group_available_accounts' as MetricType, group: 'group' as const, label: t('admin.ops.alertRules.metrics.groupAvailableAccounts') },
-    { type: 'group_available_ratio' as MetricType, group: 'group' as const, label: t('admin.ops.alertRules.metrics.groupAvailableRatio') },
-    { type: 'group_rate_limit_ratio' as MetricType, group: 'group' as const, label: t('admin.ops.alertRules.metrics.groupRateLimitRatio') },
+    {
+      type: 'group_available_accounts',
+      group: 'group',
+      label: t('admin.ops.alertRules.metrics.groupAvailableAccounts'),
+      description: t('admin.ops.alertRules.metricDescriptions.groupAvailableAccounts'),
+      recommendedOperator: '<',
+      recommendedThreshold: 1
+    },
+    {
+      type: 'group_available_ratio',
+      group: 'group',
+      label: t('admin.ops.alertRules.metrics.groupAvailableRatio'),
+      description: t('admin.ops.alertRules.metricDescriptions.groupAvailableRatio'),
+      recommendedOperator: '<',
+      recommendedThreshold: 50,
+      unit: '%'
+    },
+    {
+      type: 'group_rate_limit_ratio',
+      group: 'group',
+      label: t('admin.ops.alertRules.metrics.groupRateLimitRatio'),
+      description: t('admin.ops.alertRules.metricDescriptions.groupRateLimitRatio'),
+      recommendedOperator: '>',
+      recommendedThreshold: 10,
+      unit: '%'
+    },
 
     // Account-level metrics
-    { type: 'account_rate_limited_count' as MetricType, group: 'account' as const, label: t('admin.ops.alertRules.metrics.accountRateLimitedCount') },
-    { type: 'account_error_count' as MetricType, group: 'account' as const, label: t('admin.ops.alertRules.metrics.accountErrorCount') },
-    { type: 'account_error_ratio' as MetricType, group: 'account' as const, label: t('admin.ops.alertRules.metrics.accountErrorRatio') },
-    { type: 'overload_account_count' as MetricType, group: 'account' as const, label: t('admin.ops.alertRules.metrics.overloadAccountCount') }
-  ] satisfies Array<{ type: MetricType; group: MetricGroup; label: string }>
+    {
+      type: 'account_rate_limited_count',
+      group: 'account',
+      label: t('admin.ops.alertRules.metrics.accountRateLimitedCount'),
+      description: t('admin.ops.alertRules.metricDescriptions.accountRateLimitedCount'),
+      recommendedOperator: '>',
+      recommendedThreshold: 0
+    },
+    {
+      type: 'account_error_count',
+      group: 'account',
+      label: t('admin.ops.alertRules.metrics.accountErrorCount'),
+      description: t('admin.ops.alertRules.metricDescriptions.accountErrorCount'),
+      recommendedOperator: '>',
+      recommendedThreshold: 0
+    },
+    {
+      type: 'account_error_ratio',
+      group: 'account',
+      label: t('admin.ops.alertRules.metrics.accountErrorRatio'),
+      description: t('admin.ops.alertRules.metricDescriptions.accountErrorRatio'),
+      recommendedOperator: '>',
+      recommendedThreshold: 5,
+      unit: '%'
+    },
+    {
+      type: 'overload_account_count',
+      group: 'account',
+      label: t('admin.ops.alertRules.metrics.overloadAccountCount'),
+      description: t('admin.ops.alertRules.metricDescriptions.overloadAccountCount'),
+      recommendedOperator: '>',
+      recommendedThreshold: 0
+    }
+  ] satisfies MetricDefinition[]
+})
+
+const selectedMetricDefinition = computed(() => {
+  const metricType = draft.value?.metric_type
+  if (!metricType) return null
+  return metricDefinitions.value.find((m) => m.type === metricType) ?? null
 })
 
 const metricOptions = computed(() => {
@@ -137,6 +324,9 @@ const editorValidation = computed(() => {
   if (!r) return { valid: true, errors }
   if (!r.name || !r.name.trim()) errors.push(t('admin.ops.alertRules.validation.nameRequired'))
   if (!r.metric_type) errors.push(t('admin.ops.alertRules.validation.metricRequired'))
+  if (groupMetricTypes.has(r.metric_type) && !parsePositiveInt(r.filters?.group_id)) {
+    errors.push(t('admin.ops.alertRules.validation.groupIdRequired'))
+  }
   if (!r.operator) errors.push(t('admin.ops.alertRules.validation.operatorRequired'))
   if (!(typeof r.threshold === 'number' && Number.isFinite(r.threshold)))
     errors.push(t('admin.ops.alertRules.validation.thresholdRequired'))
@@ -321,6 +511,18 @@ function cancelDelete() {
           <div>
             <label class="input-label">{{ t('admin.ops.alertRules.form.metric') }}</label>
             <Select v-model="draft!.metric_type" :options="metricOptions" />
+            <div v-if="selectedMetricDefinition" class="mt-1 space-y-0.5 text-xs text-gray-500 dark:text-gray-400">
+              <p>{{ selectedMetricDefinition.description }}</p>
+              <p>
+                {{
+                  t('admin.ops.alertRules.hints.recommended', {
+                    operator: selectedMetricDefinition.recommendedOperator,
+                    threshold: selectedMetricDefinition.recommendedThreshold,
+                    unit: selectedMetricDefinition.unit || ''
+                  })
+                }}
+              </p>
+            </div>
           </div>
 
           <div>
@@ -328,6 +530,23 @@ function cancelDelete() {
             <Select v-model="draft!.operator" :options="operatorOptions" />
           </div>
 
+          <div class="md:col-span-2">
+            <label class="input-label">
+              {{ t('admin.ops.alertRules.form.groupId') }}
+              <span v-if="isGroupMetricSelected" class="ml-1 text-red-500">*</span>
+            </label>
+            <Select
+              v-model="draftGroupId"
+              :options="groupOptions"
+              searchable
+              :placeholder="t('admin.ops.alertRules.form.groupPlaceholder')"
+              :error="isGroupMetricSelected && !draftGroupId"
+            />
+            <p class="mt-1 text-xs text-gray-500 dark:text-gray-400">
+              {{ isGroupMetricSelected ? t('admin.ops.alertRules.hints.groupRequired') : t('admin.ops.alertRules.hints.groupOptional') }}
+            </p>
+          </div>
+
           <div>
             <label class="input-label">{{ t('admin.ops.alertRules.form.threshold') }}</label>
             <input v-model.number="draft!.threshold" class="input" type="number" />
diff --git a/frontend/src/views/admin/ops/components/OpsDashboardHeader.vue b/frontend/src/views/admin/ops/components/OpsDashboardHeader.vue
index fb622eaa..afc17813 100644
--- a/frontend/src/views/admin/ops/components/OpsDashboardHeader.vue
+++ b/frontend/src/views/admin/ops/components/OpsDashboardHeader.vue
@@ -239,47 +239,6 @@ const ttftP50Ms = computed(() => overview.value?.ttft?.p50_ms ?? null)
 const ttftAvgMs = computed(() => overview.value?.ttft?.avg_ms ?? null)
 const ttftMaxMs = computed(() => overview.value?.ttft?.max_ms ?? null)
 
-// --- WebSocket status ---
-
-const wsStatusLabel = computed(() => {
-  switch (props.wsStatus) {
-    case 'connected':
-      return t('admin.ops.realtime.connected')
-    case 'connecting':
-      return t('admin.ops.realtime.connecting')
-    case 'reconnecting':
-      return t('admin.ops.realtime.reconnecting')
-    case 'offline':
-      return t('admin.ops.realtime.offline')
-    case 'closed':
-    default:
-      return t('admin.ops.realtime.closed')
-  }
-})
-
-const wsStatusDotClass = computed(() => {
-  switch (props.wsStatus) {
-    case 'connected':
-      return 'bg-green-500'
-    case 'reconnecting':
-    case 'connecting':
-      return 'bg-yellow-500'
-    case 'offline':
-      return 'bg-orange-500'
-    case 'closed':
-    default:
-      return 'bg-gray-400'
-  }
-})
-
-const wsReconnectHint = computed(() => {
-  if (props.wsStatus !== 'reconnecting') return ''
-  const delayMs = props.wsReconnectInMs ?? null
-  if (typeof delayMs !== 'number' || !Number.isFinite(delayMs) || delayMs <= 0) return ''
-  const sec = Math.max(1, Math.ceil(delayMs / 1000))
-  return t('admin.ops.realtime.reconnectIn', { seconds: sec })
-})
-
 // --- Health Score & Diagnosis (primary) ---
 
 const isSystemIdle = computed(() => {
@@ -662,19 +621,14 @@ function openJobsDetails() {
 
           <span>·</span>
           <span>{{ t('common.refresh') }}: {{ updatedAtLabel }}</span>
-          <span>·</span>
 
-          <span class="flex items-center gap-1.5">
-            <span class="relative flex h-2 w-2">
-              <span
-                v-if="wsStatus === 'connected'"
-                class="absolute inline-flex h-full w-full animate-ping rounded-full bg-green-400 opacity-75"
-              ></span>
-              <span class="relative inline-flex h-2 w-2 rounded-full" :class="wsStatusDotClass"></span>
+          <template v-if="systemMetrics">
+            <span>·</span>
+            <span>
+              {{ t('admin.ops.collectedAt') }} {{ formatTimeShort(systemMetrics.created_at) }}
+              ({{ t('admin.ops.window') }} {{ systemMetrics.window_minutes }}m)
             </span>
-            <span>{{ wsStatusLabel }}</span>
-            <span v-if="wsReconnectHint" class="text-[11px] text-gray-400">({{ wsReconnectHint }})</span>
-          </span>
+          </template>
         </div>
       </div>
 
@@ -1189,14 +1143,6 @@ function openJobsDetails() {
 
     <!-- Integrated: System health (cards) -->
     <div v-if="overview" class="mt-2 border-t border-gray-100 pt-4 dark:border-dark-700">
-      <div class="mb-3 flex flex-wrap items-center justify-between gap-2 text-xs text-gray-500 dark:text-gray-400">
-        <span v-if="systemMetrics">
-          {{ t('admin.ops.collectedAt') }} {{ formatTimeShort(systemMetrics.created_at) }}
-          ({{ t('admin.ops.window') }} {{ systemMetrics.window_minutes }}m)
-        </span>
-        <span v-else>{{ t('admin.ops.noSystemMetrics') }}</span>
-      </div>
-
       <div class="grid grid-cols-2 gap-3 sm:grid-cols-3 lg:grid-cols-6">
         <!-- CPU -->
         <div class="rounded-xl bg-gray-50 p-3 dark:bg-dark-900">
diff --git a/frontend/src/views/admin/ops/components/OpsRequestDetailsModal.vue b/frontend/src/views/admin/ops/components/OpsRequestDetailsModal.vue
index e1063bce..3044ee3a 100644
--- a/frontend/src/views/admin/ops/components/OpsRequestDetailsModal.vue
+++ b/frontend/src/views/admin/ops/components/OpsRequestDetailsModal.vue
@@ -150,11 +150,10 @@ const kindBadgeClass = (kind: string) => {
 <template>
   <BaseDialog :show="modelValue" :title="props.preset.title || t('admin.ops.requestDetails.title')" width="full" @close="close">
     <template #default>
-      <div class="text-xs text-gray-500 dark:text-gray-400 mb-4">
-        {{ t('admin.ops.requestDetails.rangeLabel', { range: rangeLabel }) }}
-      </div>
-
-      <div class="flex justify-end mb-4">
+      <div class="flex items-center justify-between mb-4">
+        <div class="text-xs text-gray-500 dark:text-gray-400">
+          {{ t('admin.ops.requestDetails.rangeLabel', { range: rangeLabel }) }}
+        </div>
         <button
           type="button"
           class="btn btn-secondary btn-sm"