From c432f457b8da859f030284d8a96e50a3aaa58258 Mon Sep 17 00:00:00 2001
From: MerCry <jiong1114>
Date: Mon, 2 Mar 2026 22:14:46 +0800
Subject: [PATCH] feat: implement metadata field definition with status
 governance [AC-IDSMETA-13, AC-IDSMETA-14]

---
 .../src/api/decomposition-template.ts         |  59 ++
 ai-service-admin/src/api/metadata-schema.ts   |  59 ++
 .../metadata/MetadataFieldRenderer.vue        | 189 +++++
 .../src/components/metadata/MetadataForm.vue  | 224 ++++++
 .../components/metadata/TypeChangeHandler.vue | 232 ++++++
 .../src/components/metadata/index.ts          |   3 +
 ai-service-admin/src/router/index.ts          |  12 +
 .../src/types/decomposition-template.ts       |  84 +++
 ai-service-admin/src/types/intent-rule.ts     |   5 +
 ai-service-admin/src/types/metadata.ts        |  93 +++
 ai-service-admin/src/types/prompt-template.ts |  11 +-
 ai-service-admin/src/types/script-flow.ts     |  33 +-
 .../admin/decomposition-template/index.vue    | 676 ++++++++++++++++++
 .../src/views/admin/intent-rule/index.vue     |  46 +-
 .../components/DocumentList.vue               | 323 +++++++--
 .../src/views/admin/metadata-schema/index.vue | 587 +++++++++++++++
 .../admin/monitoring/ConversationTracking.vue |   4 +-
 .../src/views/admin/prompt-template/index.vue |  51 +-
 .../components/ConstraintManager.vue          | 142 ++++
 .../src/views/admin/script-flow/index.vue     | 321 ++++++++-
 ai-service/app/api/admin/__init__.py          |   6 +
 .../api/admin/metadata_field_definition.py    | 360 ++++++++++
 ai-service/app/main.py                        |   6 +
 ai-service/app/models/entities.py             | 329 ++++++++-
 .../metadata_field_definition_service.py      | 472 ++++++++++++
 25 files changed, 4244 insertions(+), 83 deletions(-)
 create mode 100644 ai-service-admin/src/api/decomposition-template.ts
 create mode 100644 ai-service-admin/src/api/metadata-schema.ts
 create mode 100644 ai-service-admin/src/components/metadata/MetadataFieldRenderer.vue
 create mode 100644 ai-service-admin/src/components/metadata/MetadataForm.vue
 create mode 100644 ai-service-admin/src/components/metadata/TypeChangeHandler.vue
 create mode 100644 ai-service-admin/src/components/metadata/index.ts
 create mode 100644 ai-service-admin/src/types/decomposition-template.ts
 create mode 100644 ai-service-admin/src/types/metadata.ts
 create mode 100644 ai-service-admin/src/views/admin/decomposition-template/index.vue
 create mode 100644 ai-service-admin/src/views/admin/metadata-schema/index.vue
 create mode 100644 ai-service-admin/src/views/admin/script-flow/components/ConstraintManager.vue
 create mode 100644 ai-service/app/api/admin/metadata_field_definition.py
 create mode 100644 ai-service/app/services/metadata_field_definition_service.py

diff --git a/ai-service-admin/src/api/decomposition-template.ts b/ai-service-admin/src/api/decomposition-template.ts
new file mode 100644
index 0000000..ad7a860
--- /dev/null
+++ b/ai-service-admin/src/api/decomposition-template.ts
@@ -0,0 +1,59 @@
+import request from '@/utils/request'
+import type {
+  DecompositionTemplate,
+  DecompositionTemplateDetail,
+  DecompositionTemplateCreate,
+  DecompositionTemplateUpdate,
+  DecompositionTemplateListResponse
+} from '@/types/decomposition-template'
+
+export const decompositionTemplateApi = {
+  list: (params?: { scene?: string; status?: string }) =>
+    request<DecompositionTemplateListResponse>({
+      method: 'GET',
+      url: '/admin/decomposition-templates',
+      params
+    }),
+
+  get: (id: string) =>
+    request<DecompositionTemplateDetail>({
+      method: 'GET',
+      url: `/admin/decomposition-templates/${id}`
+    }),
+
+  create: (data: DecompositionTemplateCreate) =>
+    request<DecompositionTemplate>({
+      method: 'POST',
+      url: '/admin/decomposition-templates',
+      data
+    }),
+
+  update: (id: string, data: DecompositionTemplateUpdate) =>
+    request<DecompositionTemplate>({
+      method: 'PUT',
+      url: `/admin/decomposition-templates/${id}`,
+      data
+    }),
+
+  delete: (id: string) =>
+    request({ method: 'DELETE', url: `/admin/decomposition-templates/${id}` }),
+
+  activate: (id: string) =>
+    request<DecompositionTemplate>({
+      method: 'POST',
+      url: `/admin/decomposition-templates/${id}/activate`
+    }),
+
+  archive: (id: string) =>
+    request<DecompositionTemplate>({
+      method: 'POST',
+      url: `/admin/decomposition-templates/${id}/archive`
+    }),
+
+  rollback: (id: string, version: number) =>
+    request<DecompositionTemplate>({
+      method: 'POST',
+      url: `/admin/decomposition-templates/${id}/rollback`,
+      data: { version }
+    })
+}
diff --git a/ai-service-admin/src/api/metadata-schema.ts b/ai-service-admin/src/api/metadata-schema.ts
new file mode 100644
index 0000000..b091a4a
--- /dev/null
+++ b/ai-service-admin/src/api/metadata-schema.ts
@@ -0,0 +1,59 @@
+import request from '@/utils/request'
+import type {
+  MetadataFieldDefinition,
+  MetadataFieldCreateRequest,
+  MetadataFieldUpdateRequest,
+  MetadataFieldListResponse,
+  MetadataPayload,
+  MetadataScope
+} from '@/types/metadata'
+
+export const metadataSchemaApi = {
+  list: (status?: 'draft' | 'active' | 'deprecated') =>
+    request<MetadataFieldListResponse>({ method: 'GET', url: '/admin/metadata-schemas', params: status ? { status } : {} }),
+
+  get: (id: string) =>
+    request<MetadataFieldDefinition>({ method: 'GET', url: `/admin/metadata-schemas/${id}` }),
+
+  create: (data: MetadataFieldCreateRequest) =>
+    request<MetadataFieldDefinition>({ method: 'POST', url: '/admin/metadata-schemas', data }),
+
+  update: (id: string, data: MetadataFieldUpdateRequest) =>
+    request<MetadataFieldDefinition>({ method: 'PUT', url: `/admin/metadata-schemas/${id}`, data }),
+
+  delete: (id: string) =>
+    request({ method: 'DELETE', url: `/admin/metadata-schemas/${id}` }),
+
+  getByScope: (scope: MetadataScope, includeDeprecated = false) =>
+    request<MetadataFieldListResponse>({
+      method: 'GET',
+      url: '/admin/metadata-schemas',
+      params: { scope, include_deprecated: includeDeprecated }
+    }),
+
+  validate: (metadata: MetadataPayload, scope?: MetadataScope) =>
+    request<{ valid: boolean; errors?: { field_key: string; message: string }[] }>({
+      method: 'POST',
+      url: '/admin/metadata-schemas/validate',
+      data: { metadata, scope }
+    }),
+
+  checkCompatibility: (oldScope: MetadataScope, newScope: MetadataScope, metadata: MetadataPayload) =>
+    request<{
+      compatible: boolean;
+      conflicts: { field_key: string; reason: string }[];
+      preserved_keys: string[]
+    }>({
+      method: 'POST',
+      url: '/admin/metadata-schemas/check-compatibility',
+      data: { old_scope: oldScope, new_scope: newScope, metadata }
+    })
+}
+
+export type {
+  MetadataFieldDefinition,
+  MetadataFieldCreateRequest,
+  MetadataFieldUpdateRequest,
+  MetadataFieldListResponse,
+  MetadataPayload
+}
diff --git a/ai-service-admin/src/components/metadata/MetadataFieldRenderer.vue b/ai-service-admin/src/components/metadata/MetadataFieldRenderer.vue
new file mode 100644
index 0000000..9ce23d0
--- /dev/null
+++ b/ai-service-admin/src/components/metadata/MetadataFieldRenderer.vue
@@ -0,0 +1,189 @@
+<template>
+  <div class="metadata-field-renderer">
+    <el-form-item
+      :label="field.label"
+      :prop="propPath"
+      :required="field.required && !isDeprecated"
+      :class="{ 'is-deprecated': isDeprecated }"
+    >
+      <template #label>
+        <div class="field-label-wrapper">
+          <span>{{ field.label }}</span>
+          <el-tag v-if="isDeprecated" type="danger" size="small" class="deprecated-tag">
+            已废弃
+          </el-tag>
+          <el-tooltip v-if="field.description" :content="field.description" placement="top">
+            <el-icon class="field-help"><QuestionFilled /></el-icon>
+          </el-tooltip>
+        </div>
+      </template>
+
+      <div v-if="isDeprecated" class="deprecated-notice">
+        <el-alert
+          type="warning"
+          :closable="false"
+          show-icon
+        >
+          <template #title>
+            此字段已废弃，仅保留历史数据展示，不可编辑
+          </template>
+        </el-alert>
+        <div class="deprecated-value" v-if="modelValue !== undefined && modelValue !== null && modelValue !== ''">
+          当前值: {{ formatValue(modelValue) }}
+        </div>
+      </div>
+
+      <template v-else>
+        <el-input
+          v-if="field.type === 'string'"
+          :model-value="modelValue as string"
+          @update:model-value="$emit('update:modelValue', $event)"
+          :placeholder="placeholder"
+          :disabled="disabled"
+          clearable
+        />
+
+        <el-input-number
+          v-else-if="field.type === 'number'"
+          :model-value="modelValue as number"
+          @update:model-value="$emit('update:modelValue', $event)"
+          :placeholder="placeholder"
+          :disabled="disabled"
+          style="width: 100%"
+        />
+
+        <el-switch
+          v-else-if="field.type === 'boolean'"
+          :model-value="modelValue as boolean"
+          @update:model-value="$emit('update:modelValue', $event)"
+          :disabled="disabled"
+        />
+
+        <el-select
+          v-else-if="field.type === 'enum'"
+          :model-value="modelValue as string"
+          @update:model-value="$emit('update:modelValue', $event)"
+          :placeholder="placeholder"
+          :disabled="disabled"
+          clearable
+          style="width: 100%"
+        >
+          <el-option
+            v-for="opt in field.options"
+            :key="opt"
+            :label="opt"
+            :value="opt"
+          />
+        </el-select>
+
+        <el-select
+          v-else-if="field.type === 'array_enum'"
+          :model-value="modelValue as string[]"
+          @update:model-value="$emit('update:modelValue', $event)"
+          :placeholder="placeholder"
+          :disabled="disabled"
+          multiple
+          clearable
+          style="width: 100%"
+        >
+          <el-option
+            v-for="opt in field.options"
+            :key="opt"
+            :label="opt"
+            :value="opt"
+          />
+        </el-select>
+      </template>
+
+      <div v-if="fieldHint" class="field-hint">{{ fieldHint }}</div>
+    </el-form-item>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import { QuestionFilled } from '@element-plus/icons-vue'
+import type { MetadataFieldDefinition, MetadataPayload } from '@/types/metadata'
+
+const props = defineProps<{
+  field: MetadataFieldDefinition
+  modelValue: string | number | boolean | string[] | undefined
+  propPath?: string
+  disabled?: boolean
+  isNewObject?: boolean
+}>()
+
+const emit = defineEmits<{
+  (e: 'update:modelValue', value: string | number | boolean | string[] | undefined): void
+}>()
+
+const isDeprecated = computed(() => props.field.status === 'deprecated')
+
+const placeholder = computed(() => {
+  if (props.field.default !== undefined) {
+    return `默认: ${props.field.default}`
+  }
+  return `请输入${props.field.label}`
+})
+
+const fieldHint = computed(() => {
+  const hints: string[] = []
+  if (props.field.is_filterable) {
+    hints.push('可作为过滤条件')
+  }
+  if (props.field.is_rank_feature) {
+    hints.push('可作为排序特征')
+  }
+  return hints.join(' | ')
+})
+
+const formatValue = (value: string | number | boolean | string[] | undefined): string => {
+  if (value === undefined || value === null) return '无'
+  if (Array.isArray(value)) return value.join(', ')
+  return String(value)
+}
+</script>
+
+<style scoped>
+.metadata-field-renderer {
+  width: 100%;
+}
+
+.field-label-wrapper {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.deprecated-tag {
+  font-size: 10px;
+}
+
+.field-help {
+  color: var(--el-text-color-secondary);
+  cursor: help;
+}
+
+.is-deprecated :deep(.el-form-item__label) {
+  color: var(--el-text-color-secondary);
+}
+
+.deprecated-notice {
+  margin-bottom: 8px;
+}
+
+.deprecated-value {
+  margin-top: 8px;
+  padding: 8px 12px;
+  background-color: var(--el-fill-color-light);
+  border-radius: 4px;
+  font-size: 13px;
+  color: var(--el-text-color-regular);
+}
+
+.field-hint {
+  margin-top: 4px;
+  font-size: 12px;
+  color: var(--el-text-color-secondary);
+}
+</style>
diff --git a/ai-service-admin/src/components/metadata/MetadataForm.vue b/ai-service-admin/src/components/metadata/MetadataForm.vue
new file mode 100644
index 0000000..480a060
--- /dev/null
+++ b/ai-service-admin/src/components/metadata/MetadataForm.vue
@@ -0,0 +1,224 @@
+<template>
+  <div class="metadata-form">
+    <div v-if="loading" class="loading-wrapper">
+      <el-skeleton :rows="3" animated />
+    </div>
+    
+    <template v-else>
+      <div v-if="allFields.length === 0" class="empty-fields">
+        <el-empty description="暂无适用的元数据字段" :image-size="60" />
+      </div>
+      
+      <template v-else>
+        <el-row :gutter="16">
+          <el-col
+            v-for="field in visibleFields"
+            :key="field.id"
+            :xs="24"
+            :sm="12"
+            :md="colSpan"
+          >
+            <MetadataFieldRenderer
+              :field="field"
+              :model-value="localMetadata[field.field_key]"
+              :prop-path="`metadata.${field.field_key}`"
+              :disabled="disabled || (field.status === 'deprecated' && !showDeprecatedEditable)"
+              :is-new-object="isNewObject"
+              @update:model-value="handleFieldUpdate(field.field_key, $event)"
+            />
+          </el-col>
+        </el-row>
+
+        <div v-if="deprecatedFields.length > 0 && showDeprecated" class="deprecated-section">
+          <el-divider content-position="left">
+            <el-tag type="danger" size="small">已废弃字段</el-tag>
+          </el-divider>
+          <el-row :gutter="16">
+            <el-col
+              v-for="field in deprecatedFields"
+              :key="field.id"
+              :xs="24"
+              :sm="12"
+              :md="colSpan"
+            >
+              <MetadataFieldRenderer
+                :field="field"
+                :model-value="localMetadata[field.field_key]"
+                :prop-path="`metadata.${field.field_key}`"
+                disabled
+                :is-new-object="isNewObject"
+                @update:model-value="handleFieldUpdate(field.field_key, $event)"
+              />
+            </el-col>
+          </el-row>
+        </div>
+      </template>
+    </template>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, watch, onMounted } from 'vue'
+import { ElMessage } from 'element-plus'
+import MetadataFieldRenderer from './MetadataFieldRenderer.vue'
+import { metadataSchemaApi } from '@/api/metadata-schema'
+import type { MetadataFieldDefinition, MetadataPayload, MetadataScope } from '@/types/metadata'
+
+const props = withDefaults(defineProps<{
+  scope: MetadataScope
+  modelValue?: MetadataPayload
+  disabled?: boolean
+  isNewObject?: boolean
+  showDeprecated?: boolean
+  showDeprecatedEditable?: boolean
+  colSpan?: number
+}>(), {
+  modelValue: () => ({}),
+  disabled: false,
+  isNewObject: true,
+  showDeprecated: true,
+  showDeprecatedEditable: false,
+  colSpan: 8
+})
+
+const emit = defineEmits<{
+  (e: 'update:modelValue', value: MetadataPayload): void
+  (e: 'fields-loaded', fields: MetadataFieldDefinition[]): void
+}>()
+
+const loading = ref(false)
+const allFields = ref<MetadataFieldDefinition[]>([])
+const localMetadata = ref<MetadataPayload>({})
+
+const activeFields = computed(() => {
+  return allFields.value.filter(f => f.status === 'active')
+})
+
+const deprecatedFields = computed(() => {
+  return allFields.value.filter(f => f.status === 'deprecated')
+})
+
+const visibleFields = computed(() => {
+  if (props.isNewObject) {
+    return activeFields.value
+  }
+  return allFields.value.filter(f => f.status !== 'draft')
+})
+
+const loadFields = async () => {
+  loading.value = true
+  try {
+    const res = await metadataSchemaApi.getByScope(props.scope, props.showDeprecated)
+    allFields.value = res.items || []
+    emit('fields-loaded', allFields.value)
+    
+    applyDefaults()
+  } catch (error: any) {
+    console.error('加载元数据字段失败', error)
+    ElMessage.error('加载元数据字段失败')
+  } finally {
+    loading.value = false
+  }
+}
+
+const applyDefaults = () => {
+  const defaults: MetadataPayload = {}
+  activeFields.value.forEach(field => {
+    if (field.default !== undefined && localMetadata.value[field.field_key] === undefined) {
+      defaults[field.field_key] = field.default
+    }
+  })
+  if (Object.keys(defaults).length > 0) {
+    localMetadata.value = { ...defaults, ...localMetadata.value }
+    emit('update:modelValue', { ...localMetadata.value })
+  }
+}
+
+const handleFieldUpdate = (fieldKey: string, value: string | number | boolean | string[] | undefined) => {
+  localMetadata.value[fieldKey] = value
+  emit('update:modelValue', { ...localMetadata.value })
+}
+
+watch(() => props.modelValue, (newVal) => {
+  if (newVal) {
+    localMetadata.value = { ...newVal }
+  }
+}, { immediate: true, deep: true })
+
+watch(() => props.scope, () => {
+  loadFields()
+})
+
+onMounted(() => {
+  loadFields()
+})
+
+defineExpose({
+  validate: async () => {
+    const errors: { field_key: string; message: string }[] = []
+    
+    activeFields.value.forEach(field => {
+      if (field.required) {
+        const value = localMetadata.value[field.field_key]
+        if (value === undefined || value === null || value === '' || 
+            (Array.isArray(value) && value.length === 0)) {
+          errors.push({
+            field_key: field.field_key,
+            message: `${field.label} 为必填项`
+          })
+        }
+      }
+      
+      if (field.type === 'enum' || field.type === 'array_enum') {
+        const value = localMetadata.value[field.field_key]
+        if (value !== undefined && value !== null && field.options) {
+          if (field.type === 'enum' && !field.options.includes(value as string)) {
+            errors.push({
+              field_key: field.field_key,
+              message: `${field.label} 的值不在有效选项中`
+            })
+          }
+          if (field.type === 'array_enum' && Array.isArray(value)) {
+            const invalidValues = value.filter(v => !field.options!.includes(v))
+            if (invalidValues.length > 0) {
+              errors.push({
+                field_key: field.field_key,
+                message: `${field.label} 包含无效选项: ${invalidValues.join(', ')}`
+              })
+            }
+          }
+        }
+      }
+    })
+    
+    return {
+      valid: errors.length === 0,
+      errors
+    }
+  },
+  getMetadata: () => ({ ...localMetadata.value }),
+  getFields: () => allFields.value
+})
+</script>
+
+<style scoped>
+.metadata-form {
+  width: 100%;
+}
+
+.loading-wrapper {
+  padding: 16px;
+}
+
+.empty-fields {
+  padding: 16px;
+  text-align: center;
+}
+
+.deprecated-section {
+  margin-top: 16px;
+  padding: 12px;
+  background-color: var(--el-fill-color-lighter);
+  border-radius: 6px;
+}
+</style>
diff --git a/ai-service-admin/src/components/metadata/TypeChangeHandler.vue b/ai-service-admin/src/components/metadata/TypeChangeHandler.vue
new file mode 100644
index 0000000..9819211
--- /dev/null
+++ b/ai-service-admin/src/components/metadata/TypeChangeHandler.vue
@@ -0,0 +1,232 @@
+<template>
+  <el-dialog
+    v-model="visible"
+    title="类型切换确认"
+    width="600px"
+    :close-on-click-modal="false"
+  >
+    <div class="type-change-handler">
+      <el-alert
+        type="warning"
+        :closable="false"
+        show-icon
+        class="change-alert"
+      >
+        <template #title>
+          检测到类型变更，部分元数据字段可能需要处理
+        </template>
+      </el-alert>
+
+      <div v-if="conflicts.length > 0" class="conflicts-section">
+        <h4 class="section-title">需要处理的字段</h4>
+        <el-table :data="conflicts" stripe size="small">
+          <el-table-column prop="label" label="字段名" width="120" />
+          <el-table-column label="当前值" width="150">
+            <template #default="{ row }">
+              {{ formatValue(row.old_value) }}
+            </template>
+          </el-table-column>
+          <el-table-column label="冲突原因" min-width="120">
+            <template #default="{ row }">
+              <el-tag :type="row.conflict_type === 'removed' ? 'danger' : 'warning'" size="small">
+                {{ row.conflict_type === 'removed' ? '字段不存在' : '类型不匹配' }}
+              </el-tag>
+            </template>
+          </el-table-column>
+          <el-table-column label="处理方式" width="140">
+            <template #default="{ row }">
+              <el-select v-model="row.action" size="small" style="width: 100%">
+                <el-option label="移除" value="remove" />
+                <el-option
+                  v-if="row.map_to"
+                  :label="`映射到 ${row.map_to}`"
+                  value="map"
+                />
+              </el-select>
+            </template>
+          </el-table-column>
+        </el-table>
+      </div>
+
+      <div v-if="preserved.length > 0" class="preserved-section">
+        <h4 class="section-title">
+          <el-icon class="success-icon"><CircleCheckFilled /></el-icon>
+          保留的字段 ({{ preserved.length }})
+        </h4>
+        <div class="preserved-tags">
+          <el-tag
+            v-for="item in preserved"
+            :key="item.field_key"
+            type="success"
+            size="small"
+            class="preserved-tag"
+          >
+            {{ item.field_key }}: {{ formatValue(item.value) }}
+          </el-tag>
+        </div>
+      </div>
+    </div>
+
+    <template #footer>
+      <el-button @click="handleCancel">取消切换</el-button>
+      <el-button type="primary" @click="handleConfirm">
+        确认切换
+      </el-button>
+    </template>
+  </el-dialog>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, watch } from 'vue'
+import { CircleCheckFilled } from '@element-plus/icons-vue'
+import type { MetadataFieldDefinition, MetadataPayload, MetadataScope, TypeChangeConflict } from '@/types/metadata'
+
+interface ConflictItem extends TypeChangeConflict {
+  action: 'remove' | 'map'
+}
+
+const props = defineProps<{
+  show: boolean
+  oldScope: MetadataScope
+  newScope: MetadataScope
+  currentMetadata: MetadataPayload
+  oldFields: MetadataFieldDefinition[]
+  newFields: MetadataFieldDefinition[]
+}>()
+
+const emit = defineEmits<{
+  (e: 'update:show', value: boolean): void
+  (e: 'confirm', result: { metadata: MetadataPayload; removed: string[] }): void
+  (e: 'cancel'): void
+}>()
+
+const visible = computed({
+  get: () => props.show,
+  set: (val) => emit('update:show', val)
+})
+
+const conflicts = ref<ConflictItem[]>([])
+const preserved = ref<{ field_key: string; value: string | number | boolean | string[] | undefined }[]>([])
+
+const analyzeCompatibility = () => {
+  conflicts.value = []
+  preserved.value = []
+
+  const newFieldKeys = new Set(props.newFields.map(f => f.field_key))
+  const newFieldTypes = new Map(props.newFields.map(f => [f.field_key, f.type]))
+
+  Object.entries(props.currentMetadata).forEach(([key, value]) => {
+    if (value === undefined || value === null) return
+
+    if (!newFieldKeys.has(key)) {
+      const oldField = props.oldFields.find(f => f.field_key === key)
+      conflicts.value.push({
+        field_key: key,
+        label: oldField?.label || key,
+        conflict_type: 'removed',
+        old_value: value,
+        suggested_action: 'remove',
+        action: 'remove'
+      })
+    } else {
+      const newType = newFieldTypes.get(key)
+      const oldField = props.oldFields.find(f => f.field_key === key)
+      const oldType = oldField?.type
+
+      if (oldType !== newType) {
+        conflicts.value.push({
+          field_key: key,
+          label: oldField?.label || key,
+          conflict_type: 'type_mismatch',
+          old_value: value,
+          suggested_action: 'remove',
+          action: 'remove'
+        })
+      } else {
+        preserved.value.push({ field_key: key, value })
+      }
+    }
+  })
+}
+
+const formatValue = (value: string | number | boolean | string[] | undefined): string => {
+  if (value === undefined || value === null) return '无'
+  if (Array.isArray(value)) return value.join(', ')
+  return String(value)
+}
+
+const handleConfirm = () => {
+  const newMetadata: MetadataPayload = {}
+  const removed: string[] = []
+
+  preserved.value.forEach(item => {
+    newMetadata[item.field_key] = item.value
+  })
+
+  conflicts.value.forEach(item => {
+    if (item.action === 'remove') {
+      removed.push(item.field_key)
+    } else if (item.action === 'map' && item.map_to) {
+      newMetadata[item.map_to] = item.old_value
+    }
+  })
+
+  emit('confirm', { metadata: newMetadata, removed })
+  visible.value = false
+}
+
+const handleCancel = () => {
+  emit('cancel')
+  visible.value = false
+}
+
+watch(() => props.show, (show) => {
+  if (show) {
+    analyzeCompatibility()
+  }
+})
+</script>
+
+<style scoped>
+.type-change-handler {
+  max-height: 400px;
+  overflow-y: auto;
+}
+
+.change-alert {
+  margin-bottom: 16px;
+}
+
+.section-title {
+  margin: 16px 0 12px 0;
+  font-size: 14px;
+  font-weight: 600;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.success-icon {
+  color: var(--el-color-success);
+}
+
+.conflicts-section {
+  margin-bottom: 16px;
+}
+
+.preserved-section {
+  margin-top: 16px;
+}
+
+.preserved-tags {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.preserved-tag {
+  max-width: 200px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+</style>
diff --git a/ai-service-admin/src/components/metadata/index.ts b/ai-service-admin/src/components/metadata/index.ts
new file mode 100644
index 0000000..d5a96ee
--- /dev/null
+++ b/ai-service-admin/src/components/metadata/index.ts
@@ -0,0 +1,3 @@
+export { default as MetadataForm } from './MetadataForm.vue'
+export { default as MetadataFieldRenderer } from './MetadataFieldRenderer.vue'
+export { default as TypeChangeHandler } from './TypeChangeHandler.vue'
diff --git a/ai-service-admin/src/router/index.ts b/ai-service-admin/src/router/index.ts
index 93b5470..b4b58e5 100644
--- a/ai-service-admin/src/router/index.ts
+++ b/ai-service-admin/src/router/index.ts
@@ -53,6 +53,12 @@ const routes: Array<RouteRecordRaw> = [
     component: () => import('@/views/admin/knowledge-base/index.vue'),
     meta: { title: '多知识库管理' }
   },
+  {
+    path: '/admin/metadata-schemas',
+    name: 'MetadataSchema',
+    component: () => import('@/views/admin/metadata-schema/index.vue'),
+    meta: { title: '元数据模式配置' }
+  },
   {
     path: '/admin/intent-rules',
     name: 'IntentRule',
@@ -71,6 +77,12 @@ const routes: Array<RouteRecordRaw> = [
     component: () => import('@/views/admin/guardrail/index.vue'),
     meta: { title: '输出护栏管理' }
   },
+  {
+    path: '/admin/decomposition-templates',
+    name: 'DecompositionTemplate',
+    component: () => import('@/views/admin/decomposition-template/index.vue'),
+    meta: { title: '拆解模板管理' }
+  },
   {
     path: '/admin/monitoring/intent-rules',
     name: 'IntentRuleMonitoring',
diff --git a/ai-service-admin/src/types/decomposition-template.ts b/ai-service-admin/src/types/decomposition-template.ts
new file mode 100644
index 0000000..dfdea74
--- /dev/null
+++ b/ai-service-admin/src/types/decomposition-template.ts
@@ -0,0 +1,84 @@
+import type { MetadataPayload } from '@/types/metadata'
+
+export interface DecompositionTemplate {
+  id: string
+  name: string
+  scene: string
+  description?: string
+  current_version: number
+  status: DecompositionStatus
+  is_latest_effective: boolean
+  effective_at?: string
+  metadata?: MetadataPayload
+  created_at: string
+  updated_at: string
+}
+
+export interface DecompositionTemplateDetail {
+  id: string
+  name: string
+  scene: string
+  description?: string
+  current_version: number
+  status: DecompositionStatus
+  is_latest_effective: boolean
+  effective_at?: string
+  steps: DecompositionStep[]
+  versions: DecompositionVersion[]
+  metadata?: MetadataPayload
+  created_at: string
+  updated_at: string
+}
+
+export type DecompositionStatus = 'draft' | 'active' | 'archived'
+
+export interface DecompositionStep {
+  step_id: string
+  step_no: number
+  instruction: string
+  expected_output?: string
+  dependencies?: string[]
+}
+
+export interface DecompositionVersion {
+  version: number
+  status: DecompositionStatus
+  steps: DecompositionStep[]
+  created_at: string
+  effective_at?: string
+  archived_at?: string
+}
+
+export interface DecompositionTemplateCreate {
+  name: string
+  scene: string
+  description?: string
+  steps: DecompositionStep[]
+  metadata?: MetadataPayload
+}
+
+export interface DecompositionTemplateUpdate {
+  name?: string
+  scene?: string
+  description?: string
+  steps?: DecompositionStep[]
+  metadata?: MetadataPayload
+}
+
+export interface DecompositionTemplateListResponse {
+  data: DecompositionTemplate[]
+}
+
+export const DECOMPOSITION_STATUS_OPTIONS = [
+  { value: 'draft', label: '草稿', color: 'info' },
+  { value: 'active', label: '生效', color: 'success' },
+  { value: 'archived', label: '归档', color: 'warning' }
+]
+
+export const DECOMPOSITION_SCENE_OPTIONS = [
+  { value: 'customer_service', label: '客服场景' },
+  { value: 'sales', label: '销售场景' },
+  { value: 'support', label: '技术支持' },
+  { value: 'complaint', label: '投诉处理' },
+  { value: 'general', label: '通用场景' }
+]
diff --git a/ai-service-admin/src/types/intent-rule.ts b/ai-service-admin/src/types/intent-rule.ts
index fd6712c..e4f154b 100644
--- a/ai-service-admin/src/types/intent-rule.ts
+++ b/ai-service-admin/src/types/intent-rule.ts
@@ -1,3 +1,5 @@
+import type { MetadataPayload } from '@/types/metadata'
+
 export interface IntentRule {
   id: string
   name: string
@@ -11,6 +13,7 @@ export interface IntentRule {
   transfer_message?: string
   hit_count: number
   is_enabled: boolean
+  metadata?: MetadataPayload
   created_at: string
   updated_at: string
 }
@@ -26,6 +29,7 @@ export interface IntentRuleCreate {
   flow_id?: string
   transfer_message?: string
   is_enabled?: boolean
+  metadata?: MetadataPayload
 }
 
 export interface IntentRuleUpdate {
@@ -39,6 +43,7 @@ export interface IntentRuleUpdate {
   flow_id?: string
   transfer_message?: string
   is_enabled?: boolean
+  metadata?: MetadataPayload
 }
 
 export interface IntentRuleListResponse {
diff --git a/ai-service-admin/src/types/metadata.ts b/ai-service-admin/src/types/metadata.ts
new file mode 100644
index 0000000..ef48250
--- /dev/null
+++ b/ai-service-admin/src/types/metadata.ts
@@ -0,0 +1,93 @@
+export type MetadataFieldType = 'string' | 'number' | 'boolean' | 'enum' | 'array_enum'
+export type MetadataFieldStatus = 'draft' | 'active' | 'deprecated'
+export type MetadataScope = 'kb_document' | 'intent_rule' | 'script_flow' | 'prompt_template'
+
+export interface MetadataFieldDefinition {
+  id: string
+  field_key: string
+  label: string
+  type: MetadataFieldType
+  description?: string
+  required: boolean
+  options?: string[]
+  default?: string | number | boolean
+  scope: MetadataScope[]
+  is_filterable: boolean
+  is_rank_feature: boolean
+  status: MetadataFieldStatus
+  created_at?: string
+  updated_at?: string
+}
+
+export interface MetadataFieldCreateRequest {
+  field_key: string
+  label: string
+  type: MetadataFieldType
+  required: boolean
+  options?: string[]
+  default?: string | number | boolean
+  scope: MetadataScope[]
+  is_filterable?: boolean
+  is_rank_feature?: boolean
+  status: MetadataFieldStatus
+}
+
+export interface MetadataFieldUpdateRequest {
+  label?: string
+  required?: boolean
+  options?: string[]
+  default?: string | number | boolean
+  scope?: MetadataScope[]
+  is_filterable?: boolean
+  is_rank_feature?: boolean
+  status?: MetadataFieldStatus
+}
+
+export interface MetadataFieldListResponse {
+  items: MetadataFieldDefinition[]
+}
+
+export interface MetadataPayload {
+  [key: string]: string | number | boolean | string[] | undefined
+}
+
+export interface TypeChangeConflict {
+  field_key: string
+  label: string
+  conflict_type: 'removed' | 'type_mismatch'
+  old_value?: string | number | boolean | string[]
+  suggested_action: 'remove' | 'map'
+  map_to?: string
+}
+
+export interface TypeChangeResult {
+  preserved: { field_key: string; value: string | number | boolean | string[] | undefined }[]
+  conflicts: TypeChangeConflict[]
+}
+
+export const METADATA_STATUS_OPTIONS = [
+  { value: 'draft', label: '草稿', color: 'info', description: '字段可编辑，不可用于新建对象' },
+  { value: 'active', label: '生效', color: 'success', description: '可用于新建与编辑对象' },
+  { value: 'deprecated', label: '废弃', color: 'danger', description: '不可用于新建，历史数据可读' }
+]
+
+export const METADATA_SCOPE_OPTIONS = [
+  { value: 'kb_document', label: '知识库文档' },
+  { value: 'intent_rule', label: '意图规则' },
+  { value: 'script_flow', label: '话术流程' },
+  { value: 'prompt_template', label: 'Prompt模板' }
+]
+
+export const METADATA_TYPE_OPTIONS = [
+  { value: 'string', label: '文本' },
+  { value: 'number', label: '数字' },
+  { value: 'boolean', label: '布尔值' },
+  { value: 'enum', label: '单选枚举' },
+  { value: 'array_enum', label: '多选枚举' }
+]
+
+export const STATUS_TAG_MAP: Record<MetadataFieldStatus, '' | 'success' | 'warning' | 'danger' | 'info'> = {
+  draft: 'info',
+  active: 'success',
+  deprecated: 'danger'
+}
diff --git a/ai-service-admin/src/types/prompt-template.ts b/ai-service-admin/src/types/prompt-template.ts
index 18eeb49..f59450e 100644
--- a/ai-service-admin/src/types/prompt-template.ts
+++ b/ai-service-admin/src/types/prompt-template.ts
@@ -1,9 +1,12 @@
+import type { MetadataPayload } from '@/types/metadata'
+
 export interface PromptTemplate {
   id: string
   name: string
   scene: string
   description?: string
   is_default: boolean
+  metadata?: MetadataPayload
   published_version?: PromptVersionInfo
   created_at: string
   updated_at: string
@@ -24,6 +27,7 @@ export interface PromptTemplateDetail {
   current_content?: string
   variables?: PromptVariable[]
   versions?: PromptVersion[]
+  metadata?: MetadataPayload
   published_version?: PromptVersionInfo
   created_at: string
   updated_at: string
@@ -51,6 +55,7 @@ export interface PromptTemplateCreate {
   system_instruction: string
   variables?: PromptVariable[]
   is_default?: boolean
+  metadata?: MetadataPayload
 }
 
 export interface PromptTemplateUpdate {
@@ -59,6 +64,7 @@ export interface PromptTemplateUpdate {
   description?: string
   system_instruction?: string
   variables?: PromptVariable[]
+  metadata?: MetadataPayload
 }
 
 export interface PromptTemplateListResponse {
@@ -84,8 +90,11 @@ export const SCENE_OPTIONS = [
 
 export const BUILTIN_VARIABLES: PromptVariable[] = [
   { name: 'persona_name', description: 'AI 人设名称', default_value: 'AI助手' },
+  { name: 'persona_personality', description: 'AI 性格特点', default_value: '热情、耐心、专业' },
+  { name: 'persona_tone', description: 'AI 说话风格', default_value: '亲切自然，使用口语化表达' },
+  { name: 'brand_name', description: '品牌名称', default_value: '我们公司' },
   { name: 'current_time', description: '当前时间' },
-  { name: 'channel_type', description: '渠道类型（web/wechat/app）' },
+  { name: 'channel_type', description: '渠道类型（web/wechat/phone/app）' },
   { name: 'user_name', description: '用户名称' },
   { name: 'context', description: '检索上下文' },
   { name: 'query', description: '用户问题' },
diff --git a/ai-service-admin/src/types/script-flow.ts b/ai-service-admin/src/types/script-flow.ts
index b85e3b3..91b4584 100644
--- a/ai-service-admin/src/types/script-flow.ts
+++ b/ai-service-admin/src/types/script-flow.ts
@@ -1,3 +1,5 @@
+import type { MetadataPayload } from '@/types/metadata'
+
 export interface ScriptFlow {
   id: string
   name: string
@@ -5,6 +7,7 @@ export interface ScriptFlow {
   step_count: number
   is_enabled: boolean
   linked_rule_count: number
+  metadata?: MetadataPayload
   created_at: string
   updated_at: string
 }
@@ -15,10 +18,13 @@ export interface ScriptFlowDetail {
   description?: string
   steps: FlowStep[]
   is_enabled: boolean
+  metadata?: MetadataPayload
   created_at: string
   updated_at: string
 }
 
+export type ScriptMode = 'fixed' | 'flexible' | 'template'
+
 export interface FlowStep {
   step_id: string
   step_no: number
@@ -27,11 +33,18 @@ export interface FlowStep {
   timeout_seconds?: number
   timeout_action?: 'repeat' | 'skip' | 'transfer'
   next_conditions?: NextCondition[]
+  default_next?: number
+  script_mode?: ScriptMode
+  intent?: string
+  intent_description?: string
+  script_constraints?: string[]
+  expected_variables?: string[]
 }
 
 export interface NextCondition {
-  keywords: string[]
-  target_step_id: string
+  keywords?: string[]
+  pattern?: string
+  goto_step: number
 }
 
 export interface ScriptFlowCreate {
@@ -39,6 +52,7 @@ export interface ScriptFlowCreate {
   description?: string
   steps: FlowStep[]
   is_enabled?: boolean
+  metadata?: MetadataPayload
 }
 
 export interface ScriptFlowUpdate {
@@ -46,6 +60,7 @@ export interface ScriptFlowUpdate {
   description?: string
   steps?: FlowStep[]
   is_enabled?: boolean
+  metadata?: MetadataPayload
 }
 
 export interface ScriptFlowListResponse {
@@ -57,3 +72,17 @@ export const TIMEOUT_ACTION_OPTIONS = [
   { value: 'skip', label: '跳过进入下一步' },
   { value: 'transfer', label: '转人工' }
 ]
+
+export const SCRIPT_MODE_OPTIONS = [
+  { value: 'fixed' as const, label: '固定话术', description: '话术内容固定不变' },
+  { value: 'flexible' as const, label: '灵活话术', description: 'AI根据意图和上下文生成' },
+  { value: 'template' as const, label: '模板话术', description: 'AI填充模板中的变量' }
+]
+
+export const PRESET_CONSTRAINTS = [
+  '必须礼貌',
+  '语气自然',
+  '简洁明了',
+  '不要生硬',
+  '不要重复'
+]
diff --git a/ai-service-admin/src/views/admin/decomposition-template/index.vue b/ai-service-admin/src/views/admin/decomposition-template/index.vue
new file mode 100644
index 0000000..f53c4db
--- /dev/null
+++ b/ai-service-admin/src/views/admin/decomposition-template/index.vue
@@ -0,0 +1,676 @@
+<template>
+  <div class="decomposition-template-page">
+    <div class="page-header">
+      <div class="header-content">
+        <div class="title-section">
+          <h1 class="page-title">拆解模板管理</h1>
+          <p class="page-desc">管理复杂问题的拆解模板，支持版本管理与生效标记。[AC-IDSMETA-22]</p>
+        </div>
+        <div class="header-actions">
+          <el-select v-model="filterStatus" placeholder="按状态筛选" clearable style="width: 130px;">
+            <el-option
+              v-for="opt in DECOMPOSITION_STATUS_OPTIONS"
+              :key="opt.value"
+              :label="opt.label"
+              :value="opt.value"
+            />
+          </el-select>
+          <el-select v-model="filterScene" placeholder="按场景筛选" clearable style="width: 140px;">
+            <el-option
+              v-for="opt in DECOMPOSITION_SCENE_OPTIONS"
+              :key="opt.value"
+              :label="opt.label"
+              :value="opt.value"
+            />
+          </el-select>
+          <el-button type="primary" @click="handleCreate">
+            <el-icon><Plus /></el-icon>
+            新建模板
+          </el-button>
+        </div>
+      </div>
+    </div>
+
+    <el-card shadow="hover" class="template-card" v-loading="loading">
+      <el-table :data="templates" stripe style="width: 100%">
+        <el-table-column prop="name" label="模板名称" min-width="180">
+          <template #default="{ row }">
+            <div class="template-name">
+              <span class="name-text">{{ row.name }}</span>
+              <el-tag v-if="row.is_latest_effective" type="success" size="small" class="effective-tag">
+                最近生效
+              </el-tag>
+            </div>
+          </template>
+        </el-table-column>
+        <el-table-column prop="scene" label="场景" width="120">
+          <template #default="{ row }">
+            <el-tag size="small">{{ getSceneLabel(row.scene) }}</el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column prop="current_version" label="版本" width="100">
+          <template #default="{ row }">
+            <span class="version-badge">v{{ row.current_version }}</span>
+          </template>
+        </el-table-column>
+        <el-table-column prop="status" label="状态" width="100">
+          <template #default="{ row }">
+            <el-tag :type="getStatusTagType(row.status)" size="small">
+              {{ getStatusLabel(row.status) }}
+            </el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column prop="effective_at" label="生效时间" width="180">
+          <template #default="{ row }">
+            <span v-if="row.effective_at">{{ formatDate(row.effective_at) }}</span>
+            <span v-else class="no-date">-</span>
+          </template>
+        </el-table-column>
+        <el-table-column prop="updated_at" label="更新时间" width="180">
+          <template #default="{ row }">
+            {{ formatDate(row.updated_at) }}
+          </template>
+        </el-table-column>
+        <el-table-column label="操作" width="280" fixed="right">
+          <template #default="{ row }">
+            <el-button type="primary" link size="small" @click="handleEdit(row)">
+              <el-icon><Edit /></el-icon>
+              编辑
+            </el-button>
+            <el-button
+              v-if="row.status === 'draft'"
+              type="success"
+              link
+              size="small"
+              @click="handleActivate(row)"
+            >
+              <el-icon><Check /></el-icon>
+              生效
+            </el-button>
+            <el-button
+              v-if="row.status === 'active'"
+              type="warning"
+              link
+              size="small"
+              @click="handleArchive(row)"
+            >
+              <el-icon><FolderOpened /></el-icon>
+              归档
+            </el-button>
+            <el-button type="info" link size="small" @click="handleViewDetail(row)">
+              <el-icon><View /></el-icon>
+              详情
+            </el-button>
+            <el-button type="danger" link size="small" @click="handleDelete(row)">
+              <el-icon><Delete /></el-icon>
+              删除
+            </el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+    </el-card>
+
+    <el-dialog
+      v-model="dialogVisible"
+      :title="isEdit ? '编辑模板' : '新建模板'"
+      width="850px"
+      :close-on-click-modal="false"
+      destroy-on-close
+    >
+      <el-form :model="formData" :rules="formRules" ref="formRef" label-width="80px">
+        <el-row :gutter="20">
+          <el-col :span="12">
+            <el-form-item label="模板名称" prop="name">
+              <el-input v-model="formData.name" placeholder="请输入模板名称" />
+            </el-form-item>
+          </el-col>
+          <el-col :span="12">
+            <el-form-item label="场景" prop="scene">
+              <el-select v-model="formData.scene" placeholder="请选择场景" style="width: 100%;">
+                <el-option
+                  v-for="opt in DECOMPOSITION_SCENE_OPTIONS"
+                  :key="opt.value"
+                  :label="opt.label"
+                  :value="opt.value"
+                />
+              </el-select>
+            </el-form-item>
+          </el-col>
+        </el-row>
+        <el-form-item label="描述">
+          <el-input v-model="formData.description" type="textarea" :rows="2" placeholder="请输入模板描述（可选）" />
+        </el-form-item>
+
+        <el-divider content-position="left">拆解步骤</el-divider>
+
+        <div class="steps-editor">
+          <div
+            v-for="(step, index) in formData.steps"
+            :key="step.step_id"
+            class="step-item"
+          >
+            <div class="step-header">
+              <span class="step-order">步骤 {{ index + 1 }}</span>
+              <el-button type="danger" link size="small" @click="removeStep(index)">
+                删除
+              </el-button>
+            </div>
+            <el-form-item label="指令" required>
+              <el-input
+                v-model="step.instruction"
+                type="textarea"
+                :rows="2"
+                placeholder="请输入该步骤的处理指令"
+              />
+            </el-form-item>
+            <el-form-item label="期望输出">
+              <el-input
+                v-model="step.expected_output"
+                placeholder="可选：描述该步骤期望的输出格式"
+              />
+            </el-form-item>
+          </div>
+          <el-button type="primary" plain @click="addStep" style="width: 100%; margin-top: 12px;">
+            <el-icon><Plus /></el-icon>
+            添加步骤
+          </el-button>
+        </div>
+      </el-form>
+      <template #footer>
+        <el-button @click="dialogVisible = false">取消</el-button>
+        <el-button type="primary" :loading="submitting" @click="handleSubmit">
+          {{ isEdit ? '保存' : '创建' }}
+        </el-button>
+      </template>
+    </el-dialog>
+
+    <el-drawer v-model="detailDrawer" title="模板详情" size="600px" destroy-on-close>
+      <div v-if="currentTemplate" class="detail-content">
+        <div class="detail-header">
+          <h3>{{ currentTemplate.name }}</h3>
+          <div class="detail-tags">
+            <el-tag :type="getStatusTagType(currentTemplate.status)" size="small">
+              {{ getStatusLabel(currentTemplate.status) }}
+            </el-tag>
+            <el-tag v-if="currentTemplate.is_latest_effective" type="success" size="small">
+              最近生效
+            </el-tag>
+          </div>
+        </div>
+
+        <el-descriptions :column="2" border size="small">
+          <el-descriptions-item label="场景">{{ getSceneLabel(currentTemplate.scene) }}</el-descriptions-item>
+          <el-descriptions-item label="当前版本">v{{ currentTemplate.current_version }}</el-descriptions-item>
+          <el-descriptions-item label="生效时间">
+            {{ currentTemplate.effective_at ? formatDate(currentTemplate.effective_at) : '-' }}
+          </el-descriptions-item>
+          <el-descriptions-item label="创建时间">{{ formatDate(currentTemplate.created_at) }}</el-descriptions-item>
+          <el-descriptions-item label="描述" :span="2">
+            {{ currentTemplate.description || '-' }}
+          </el-descriptions-item>
+        </el-descriptions>
+
+        <el-divider content-position="left">版本历史</el-divider>
+
+        <el-timeline>
+          <el-timeline-item
+            v-for="version in currentTemplate.versions"
+            :key="version.version"
+            :type="version.status === 'active' ? 'success' : 'info'"
+            :timestamp="formatDate(version.created_at)"
+            placement="top"
+          >
+            <div class="version-item">
+              <div class="version-header">
+                <span class="version-number">v{{ version.version }}</span>
+                <el-tag :type="getStatusTagType(version.status)" size="small">
+                  {{ getStatusLabel(version.status) }}
+                </el-tag>
+              </div>
+              <div class="version-steps">
+                <div v-for="(step, idx) in version.steps" :key="step.step_id" class="version-step">
+                  <span class="step-no">{{ idx + 1 }}.</span>
+                  <span class="step-instruction">{{ step.instruction }}</span>
+                </div>
+              </div>
+              <el-button
+                v-if="version.status === 'archived'"
+                type="primary"
+                link
+                size="small"
+                @click="handleRollback(version.version)"
+              >
+                回滚到此版本
+              </el-button>
+            </div>
+          </el-timeline-item>
+        </el-timeline>
+      </div>
+    </el-drawer>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted, watch } from 'vue'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import { Plus, Edit, Delete, Check, FolderOpened, View } from '@element-plus/icons-vue'
+import { decompositionTemplateApi } from '@/api/decomposition-template'
+import { DECOMPOSITION_STATUS_OPTIONS, DECOMPOSITION_SCENE_OPTIONS } from '@/types/decomposition-template'
+import type {
+  DecompositionTemplate,
+  DecompositionTemplateDetail,
+  DecompositionTemplateCreate,
+  DecompositionTemplateUpdate,
+  DecompositionStatus
+} from '@/types/decomposition-template'
+
+const loading = ref(false)
+const templates = ref<DecompositionTemplate[]>([])
+const filterStatus = ref('')
+const filterScene = ref('')
+const dialogVisible = ref(false)
+const detailDrawer = ref(false)
+const isEdit = ref(false)
+const submitting = ref(false)
+const formRef = ref()
+const currentTemplate = ref<DecompositionTemplateDetail | null>(null)
+const currentEditId = ref('')
+
+const generateStepId = () => `step_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`
+
+const formData = ref<DecompositionTemplateCreate>({
+  name: '',
+  scene: '',
+  description: '',
+  steps: [],
+  metadata: {}
+})
+
+const formRules = {
+  name: [{ required: true, message: '请输入模板名称', trigger: 'blur' }],
+  scene: [{ required: true, message: '请选择场景', trigger: 'change' }]
+}
+
+const getSceneLabel = (scene: string) => {
+  const opt = DECOMPOSITION_SCENE_OPTIONS.find(o => o.value === scene)
+  return opt?.label || scene
+}
+
+const getStatusLabel = (status: DecompositionStatus) => {
+  const opt = DECOMPOSITION_STATUS_OPTIONS.find(o => o.value === status)
+  return opt?.label || status
+}
+
+const getStatusTagType = (status: DecompositionStatus): '' | 'success' | 'warning' | 'danger' | 'info' => {
+  const typeMap: Record<DecompositionStatus, '' | 'success' | 'warning' | 'danger' | 'info'> = {
+    draft: 'info',
+    active: 'success',
+    archived: 'warning'
+  }
+  return typeMap[status] || 'info'
+}
+
+const formatDate = (dateStr: string) => {
+  if (!dateStr) return ''
+  const date = new Date(dateStr)
+  return date.toLocaleString('zh-CN', {
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+    hour: '2-digit',
+    minute: '2-digit'
+  })
+}
+
+const loadTemplates = async () => {
+  loading.value = true
+  try {
+    const res = await decompositionTemplateApi.list({
+      status: filterStatus.value || undefined,
+      scene: filterScene.value || undefined
+    })
+    templates.value = res.data || []
+  } catch (error) {
+    ElMessage.error('加载模板列表失败')
+  } finally {
+    loading.value = false
+  }
+}
+
+const handleCreate = () => {
+  isEdit.value = false
+  currentEditId.value = ''
+  formData.value = {
+    name: '',
+    scene: '',
+    description: '',
+    steps: [],
+    metadata: {}
+  }
+  dialogVisible.value = true
+}
+
+const handleEdit = async (row: DecompositionTemplate) => {
+  isEdit.value = true
+  currentEditId.value = row.id
+  try {
+    const detail = await decompositionTemplateApi.get(row.id)
+    formData.value = {
+      name: detail.name,
+      scene: detail.scene,
+      description: detail.description || '',
+      steps: detail.steps || [],
+      metadata: detail.metadata || {}
+    }
+    dialogVisible.value = true
+  } catch (error) {
+    ElMessage.error('加载模板详情失败')
+  }
+}
+
+const handleDelete = async (row: DecompositionTemplate) => {
+  try {
+    await ElMessageBox.confirm('确定要删除该模板吗？', '确认删除', {
+      confirmButtonText: '确定',
+      cancelButtonText: '取消',
+      type: 'warning'
+    })
+    await decompositionTemplateApi.delete(row.id)
+    ElMessage.success('删除成功')
+    loadTemplates()
+  } catch (error) {
+    if (error !== 'cancel') {
+      ElMessage.error('删除失败')
+    }
+  }
+}
+
+const handleActivate = async (row: DecompositionTemplate) => {
+  try {
+    await ElMessageBox.confirm('确定要将该模板设为生效状态吗？', '确认生效', {
+      confirmButtonText: '确定',
+      cancelButtonText: '取消',
+      type: 'info'
+    })
+    await decompositionTemplateApi.activate(row.id)
+    ElMessage.success('已生效')
+    loadTemplates()
+  } catch (error) {
+    if (error !== 'cancel') {
+      ElMessage.error('操作失败')
+    }
+  }
+}
+
+const handleArchive = async (row: DecompositionTemplate) => {
+  try {
+    await ElMessageBox.confirm('确定要归档该模板吗？', '确认归档', {
+      confirmButtonText: '确定',
+      cancelButtonText: '取消',
+      type: 'warning'
+    })
+    await decompositionTemplateApi.archive(row.id)
+    ElMessage.success('已归档')
+    loadTemplates()
+  } catch (error) {
+    if (error !== 'cancel') {
+      ElMessage.error('操作失败')
+    }
+  }
+}
+
+const handleViewDetail = async (row: DecompositionTemplate) => {
+  try {
+    currentTemplate.value = await decompositionTemplateApi.get(row.id)
+    detailDrawer.value = true
+  } catch (error) {
+    ElMessage.error('加载模板详情失败')
+  }
+}
+
+const handleRollback = async (version: number) => {
+  if (!currentTemplate.value) return
+  try {
+    await ElMessageBox.confirm(`确定要回滚到版本 v${version} 吗？`, '确认回滚', {
+      confirmButtonText: '确定',
+      cancelButtonText: '取消',
+      type: 'warning'
+    })
+    await decompositionTemplateApi.rollback(currentTemplate.value.id, version)
+    ElMessage.success('回滚成功')
+    currentTemplate.value = await decompositionTemplateApi.get(currentTemplate.value.id)
+    loadTemplates()
+  } catch (error) {
+    if (error !== 'cancel') {
+      ElMessage.error('回滚失败')
+    }
+  }
+}
+
+const addStep = () => {
+  formData.value.steps.push({
+    step_id: generateStepId(),
+    step_no: formData.value.steps.length + 1,
+    instruction: '',
+    expected_output: '',
+    dependencies: []
+  })
+}
+
+const removeStep = (index: number) => {
+  formData.value.steps.splice(index, 1)
+}
+
+const handleSubmit = async () => {
+  try {
+    await formRef.value.validate()
+  } catch {
+    return
+  }
+
+  if (formData.value.steps.length === 0) {
+    ElMessage.warning('请至少添加一个步骤')
+    return
+  }
+
+  for (let i = 0; i < formData.value.steps.length; i++) {
+    if (!formData.value.steps[i].instruction?.trim()) {
+      ElMessage.warning(`步骤 ${i + 1} 的指令不能为空`)
+      return
+    }
+  }
+
+  submitting.value = true
+  try {
+    const submitData = {
+      ...formData.value,
+      steps: formData.value.steps.map((step, index) => ({
+        ...step,
+        step_no: index + 1
+      }))
+    }
+
+    if (isEdit.value) {
+      const updateData: DecompositionTemplateUpdate = submitData
+      await decompositionTemplateApi.update(currentEditId.value, updateData)
+      ElMessage.success('保存成功')
+    } else {
+      await decompositionTemplateApi.create(submitData)
+      ElMessage.success('创建成功')
+    }
+    dialogVisible.value = false
+    loadTemplates()
+  } catch (error) {
+    ElMessage.error(isEdit.value ? '保存失败' : '创建失败')
+  } finally {
+    submitting.value = false
+  }
+}
+
+watch([filterStatus, filterScene], () => {
+  loadTemplates()
+})
+
+onMounted(() => {
+  loadTemplates()
+})
+</script>
+
+<style scoped>
+.decomposition-template-page {
+  padding: 24px;
+}
+
+.page-header {
+  margin-bottom: 24px;
+}
+
+.header-content {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+  gap: 20px;
+  flex-wrap: wrap;
+}
+
+.title-section {
+  flex: 1;
+  min-width: 300px;
+}
+
+.page-title {
+  margin: 0 0 8px 0;
+  font-size: 24px;
+  font-weight: 700;
+  color: var(--el-text-color-primary);
+}
+
+.page-desc {
+  margin: 0;
+  font-size: 14px;
+  color: var(--el-text-color-secondary);
+}
+
+.header-actions {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.template-card {
+  border-radius: 8px;
+}
+
+.template-name {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.name-text {
+  font-weight: 500;
+}
+
+.effective-tag {
+  font-size: 10px;
+}
+
+.version-badge {
+  display: inline-block;
+  padding: 2px 8px;
+  background-color: var(--el-color-primary-light-9);
+  color: var(--el-color-primary);
+  border-radius: 4px;
+  font-size: 12px;
+  font-weight: 500;
+}
+
+.no-date {
+  color: var(--el-text-color-placeholder);
+}
+
+.steps-editor {
+  max-height: 350px;
+  overflow-y: auto;
+  padding: 12px;
+  background-color: var(--el-fill-color-lighter);
+  border-radius: 6px;
+}
+
+.step-item {
+  background-color: var(--el-bg-color);
+  border: 1px solid var(--el-border-color-light);
+  border-radius: 6px;
+  padding: 16px;
+  margin-bottom: 12px;
+}
+
+.step-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 12px;
+}
+
+.step-order {
+  font-weight: 600;
+  color: var(--el-text-color-primary);
+}
+
+.detail-content {
+  padding: 0 16px;
+}
+
+.detail-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 16px;
+}
+
+.detail-header h3 {
+  margin: 0;
+  font-size: 18px;
+}
+
+.detail-tags {
+  display: flex;
+  gap: 8px;
+}
+
+.version-item {
+  padding: 8px 0;
+}
+
+.version-header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-bottom: 8px;
+}
+
+.version-number {
+  font-weight: 600;
+  color: var(--el-text-color-primary);
+}
+
+.version-steps {
+  margin-bottom: 8px;
+  padding-left: 12px;
+}
+
+.version-step {
+  font-size: 13px;
+  color: var(--el-text-color-regular);
+  margin-bottom: 4px;
+}
+
+.step-no {
+  color: var(--el-text-color-secondary);
+  margin-right: 4px;
+}
+
+.step-instruction {
+  word-break: break-all;
+}
+</style>
diff --git a/ai-service-admin/src/views/admin/intent-rule/index.vue b/ai-service-admin/src/views/admin/intent-rule/index.vue
index c7309b2..717b243 100644
--- a/ai-service-admin/src/views/admin/intent-rule/index.vue
+++ b/ai-service-admin/src/views/admin/intent-rule/index.vue
@@ -4,7 +4,7 @@
       <div class="header-content">
         <div class="title-section">
           <h1 class="page-title">意图规则管理</h1>
-          <p class="page-desc">配置意图识别规则，让特定问题走固定回复或话术流程。</p>
+          <p class="page-desc">配置意图识别规则，让特定问题走固定回复或话术流程。[AC-IDSMETA-16]</p>
         </div>
         <div class="header-actions">
           <el-select v-model="filterResponseType" placeholder="按响应类型筛选" clearable style="width: 150px;">
@@ -48,6 +48,14 @@
         </el-table-column>
         <el-table-column prop="priority" label="优先级" width="80" sortable />
         <el-table-column prop="hit_count" label="命中次数" width="100" sortable />
+        <el-table-column label="元数据" width="120">
+          <template #default="{ row }">
+            <el-tag v-if="row.metadata && Object.keys(row.metadata).length > 0" size="small" type="info">
+              {{ Object.keys(row.metadata).length }} 个字段
+            </el-tag>
+            <span v-else class="no-metadata">-</span>
+          </template>
+        </el-table-column>
         <el-table-column prop="is_enabled" label="状态" width="80">
           <template #default="{ row }">
             <el-switch
@@ -79,7 +87,7 @@
     <el-dialog
       v-model="dialogVisible"
       :title="isEdit ? '编辑规则' : '新建规则'"
-      width="700px"
+      width="800px"
       :close-on-click-modal="false"
       destroy-on-close
     >
@@ -168,6 +176,16 @@
             </el-form-item>
           </div>
         </transition>
+
+        <el-divider content-position="left">元数据配置 [AC-IDSMETA-16]</el-divider>
+
+        <MetadataForm
+          ref="metadataFormRef"
+          scope="intent_rule"
+          v-model="formData.metadata"
+          :is-new-object="!isEdit"
+          :col-span="12"
+        />
       </el-form>
       <template #footer>
         <el-button @click="dialogVisible = false">取消</el-button>
@@ -198,10 +216,12 @@ import {
 } from '@/api/intent-rule'
 import { listKnowledgeBases } from '@/api/knowledge-base'
 import { listScriptFlows } from '@/api/script-flow'
+import { MetadataForm } from '@/components/metadata'
 import { RESPONSE_TYPE_OPTIONS, RESPONSE_TYPE_MAP } from '@/types/intent-rule'
 import type { IntentRule, IntentRuleCreate, IntentRuleUpdate } from '@/types/intent-rule'
 import type { KnowledgeBase } from '@/types/knowledge-base'
 import type { ScriptFlow } from '@/types/script-flow'
+import type { MetadataPayload } from '@/types/metadata'
 import KeywordInput from './components/KeywordInput.vue'
 import PatternInput from './components/PatternInput.vue'
 import TestDialog from './components/TestDialog.vue'
@@ -215,6 +235,7 @@ const dialogVisible = ref(false)
 const isEdit = ref(false)
 const submitting = ref(false)
 const formRef = ref()
+const metadataFormRef = ref()
 const currentEditId = ref('')
 const testDialogVisible = ref(false)
 const testRuleId = ref('')
@@ -231,7 +252,8 @@ const defaultFormData = (): IntentRuleCreate => ({
   target_kb_ids: [],
   flow_id: '',
   transfer_message: '',
-  is_enabled: true
+  is_enabled: true,
+  metadata: {}
 })
 
 const formData = ref<IntentRuleCreate>(defaultFormData())
@@ -308,7 +330,8 @@ const handleEdit = (row: IntentRule) => {
     target_kb_ids: row.target_kb_ids || [],
     flow_id: row.flow_id || '',
     transfer_message: row.transfer_message || '',
-    is_enabled: row.is_enabled
+    is_enabled: row.is_enabled,
+    metadata: row.metadata || {}
   }
   dialogVisible.value = true
 }
@@ -361,6 +384,14 @@ const handleSubmit = async () => {
     return
   }
 
+  if (metadataFormRef.value) {
+    const validation = await metadataFormRef.value.validate()
+    if (!validation.valid) {
+      ElMessage.warning('请完善必填的元数据字段')
+      return
+    }
+  }
+
   submitting.value = true
   try {
     if (isEdit.value) {
@@ -370,7 +401,8 @@ const handleSubmit = async () => {
         patterns: formData.value.patterns,
         response_type: formData.value.response_type,
         priority: formData.value.priority,
-        is_enabled: formData.value.is_enabled
+        is_enabled: formData.value.is_enabled,
+        metadata: formData.value.metadata
       }
       if (formData.value.response_type === 'fixed') {
         updateData.fixed_reply = formData.value.fixed_reply
@@ -464,6 +496,10 @@ onMounted(() => {
   margin-left: 4px;
 }
 
+.no-metadata {
+  color: var(--el-text-color-placeholder);
+}
+
 .slide-fade-enter-active {
   transition: all 0.3s ease-out;
 }
diff --git a/ai-service-admin/src/views/admin/knowledge-base/components/DocumentList.vue b/ai-service-admin/src/views/admin/knowledge-base/components/DocumentList.vue
index 2729a65..576bb8c 100644
--- a/ai-service-admin/src/views/admin/knowledge-base/components/DocumentList.vue
+++ b/ai-service-admin/src/views/admin/knowledge-base/components/DocumentList.vue
@@ -1,22 +1,17 @@
 <template>
   <div class="document-list">
     <div class="list-header">
-      <el-upload
-        ref="uploadRef"
-        :action="uploadUrl"
-        :headers="uploadHeaders"
-        :data="{ kb_id: kbId }"
-        :show-file-list="false"
-        :before-upload="beforeUpload"
-        :on-success="handleUploadSuccess"
-        :on-error="handleUploadError"
+      <el-button type="primary" @click="handleUploadClick">
+        <el-icon><Upload /></el-icon>
+        上传文档
+      </el-button>
+      <input
+        ref="fileInputRef"
+        type="file"
         accept=".txt,.md,.pdf,.doc,.docx,.xls,.xlsx"
-      >
-        <el-button type="primary">
-          <el-icon><Upload /></el-icon>
-          上传文档
-        </el-button>
-      </el-upload>
+        style="display: none"
+        @change="handleFileSelect"
+      />
     </div>
 
     <el-table :data="documents" v-loading="loading" stripe>
@@ -28,13 +23,36 @@
           </el-tag>
         </template>
       </el-table-column>
+      <el-table-column label="元数据" min-width="200">
+        <template #default="{ row }">
+          <div class="metadata-preview" v-if="row.metadata && Object.keys(row.metadata).length > 0">
+            <el-tag
+              v-for="(value, key) in getPreviewMetadata(row.metadata)"
+              :key="key"
+              size="small"
+              type="info"
+              class="metadata-tag"
+            >
+              {{ key }}: {{ formatMetadataValue(value) }}
+            </el-tag>
+            <el-tag v-if="Object.keys(row.metadata).length > 3" size="small" type="info">
+              +{{ Object.keys(row.metadata).length - 3 }}
+            </el-tag>
+          </div>
+          <span v-else class="no-metadata">-</span>
+        </template>
+      </el-table-column>
       <el-table-column prop="createdAt" label="上传时间" width="180">
         <template #default="{ row }">
           {{ formatDate(row.createdAt) }}
         </template>
       </el-table-column>
-      <el-table-column label="操作" width="120">
+      <el-table-column label="操作" width="180">
         <template #default="{ row }">
+          <el-button type="primary" link size="small" @click="handleEditMetadata(row)">
+            <el-icon><Edit /></el-icon>
+            编辑元数据
+          </el-button>
           <el-button type="danger" link size="small" @click="handleDelete(row)">
             删除
           </el-button>
@@ -51,17 +69,82 @@
         @current-change="loadDocuments"
       />
     </div>
+
+    <el-dialog
+      v-model="uploadDialogVisible"
+      title="上传文档"
+      width="700px"
+      :close-on-click-modal="false"
+      destroy-on-close
+    >
+      <el-form :model="uploadForm" :rules="uploadRules" ref="uploadFormRef" label-width="80px">
+        <el-form-item label="文件">
+          <div class="file-info" v-if="selectedFile">
+            <el-icon><Document /></el-icon>
+            <span>{{ selectedFile.name }}</span>
+            <el-tag size="small" type="info">{{ formatFileSize(selectedFile.size) }}</el-tag>
+          </div>
+          <el-button v-else @click="handleUploadClick">选择文件</el-button>
+        </el-form-item>
+
+        <el-divider content-position="left">元数据配置 [AC-IDSMETA-15]</el-divider>
+
+        <MetadataForm
+          ref="metadataFormRef"
+          scope="kb_document"
+          v-model="uploadForm.metadata"
+          :is-new-object="true"
+          :col-span="12"
+        />
+      </el-form>
+      <template #footer>
+        <el-button @click="uploadDialogVisible = false">取消</el-button>
+        <el-button type="primary" :loading="uploading" @click="handleUpload">
+          上传
+        </el-button>
+      </template>
+    </el-dialog>
+
+    <el-dialog
+      v-model="editDialogVisible"
+      title="编辑元数据"
+      width="600px"
+      :close-on-click-modal="false"
+      destroy-on-close
+    >
+      <MetadataForm
+        ref="editMetadataFormRef"
+        scope="kb_document"
+        v-model="editForm.metadata"
+        :is-new-object="false"
+        :show-deprecated="true"
+        :col-span="12"
+      />
+      <template #footer>
+        <el-button @click="editDialogVisible = false">取消</el-button>
+        <el-button type="primary" :loading="saving" @click="handleSaveMetadata">
+          保存
+        </el-button>
+      </template>
+    </el-dialog>
   </div>
 </template>
 
 <script setup lang="ts">
 import { ref, onMounted, computed } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { Upload } from '@element-plus/icons-vue'
+import { Upload, Edit, Document } from '@element-plus/icons-vue'
 import { listDocuments, deleteDocument, getIndexJob } from '@/api/knowledge-base'
-import type { Document, IndexJob } from '@/types/knowledge-base'
+import { metadataSchemaApi } from '@/api/metadata-schema'
+import { MetadataForm } from '@/components/metadata'
+import type { Document as DocType, IndexJob } from '@/types/knowledge-base'
+import type { MetadataPayload } from '@/types/metadata'
 import { useTenantStore } from '@/stores/tenant'
 
+interface DocumentWithMetadata extends DocType {
+  metadata?: MetadataPayload
+}
+
 const props = defineProps<{
   kbId: string
 }>()
@@ -72,7 +155,7 @@ const emit = defineEmits<{
 
 const tenantStore = useTenantStore()
 const loading = ref(false)
-const documents = ref<Document[]>([])
+const documents = ref<DocumentWithMetadata[]>([])
 const currentPage = ref(1)
 const pagination = ref({
   page: 1,
@@ -81,14 +164,28 @@ const pagination = ref({
   totalPages: 0
 })
 
-const uploadUrl = computed(() => {
-  const baseUrl = import.meta.env.VITE_API_BASE_URL || ''
-  return `${baseUrl}/admin/kb/documents`
+const fileInputRef = ref<HTMLInputElement>()
+const uploadDialogVisible = ref(false)
+const editDialogVisible = ref(false)
+const uploading = ref(false)
+const saving = ref(false)
+const selectedFile = ref<File | null>(null)
+const uploadFormRef = ref()
+const metadataFormRef = ref()
+const editMetadataFormRef = ref()
+const currentEditDoc = ref<DocumentWithMetadata | null>(null)
+
+const uploadForm = ref({
+  metadata: {} as MetadataPayload
 })
 
-const uploadHeaders = computed(() => ({
-  'X-Tenant-Id': tenantStore.currentTenantId
-}))
+const editForm = ref({
+  metadata: {} as MetadataPayload
+})
+
+const uploadRules = {
+  file: [{ required: true, message: '请选择文件', trigger: 'change' }]
+}
 
 const getStatusType = (status: string): '' | 'success' | 'warning' | 'danger' | 'info' => {
   const typeMap: Record<string, '' | 'success' | 'warning' | 'danger' | 'info'> = {
@@ -122,6 +219,27 @@ const formatDate = (dateStr: string) => {
   })
 }
 
+const formatFileSize = (bytes: number) => {
+  if (bytes < 1024) return bytes + ' B'
+  if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB'
+  return (bytes / (1024 * 1024)).toFixed(1) + ' MB'
+}
+
+const getPreviewMetadata = (metadata: MetadataPayload) => {
+  const keys = Object.keys(metadata).slice(0, 3)
+  const result: MetadataPayload = {}
+  keys.forEach(key => {
+    result[key] = metadata[key]
+  })
+  return result
+}
+
+const formatMetadataValue = (value: string | number | boolean | string[] | undefined): string => {
+  if (value === undefined || value === null) return ''
+  if (Array.isArray(value)) return value.join(', ')
+  return String(value)
+}
+
 const loadDocuments = async () => {
   loading.value = true
   try {
@@ -139,46 +257,128 @@ const loadDocuments = async () => {
   }
 }
 
-const beforeUpload = (file: File) => {
-  const allowedTypes = [
-    'text/plain',
-    'text/markdown',
-    'application/pdf',
-    'application/msword',
-    'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
-    'application/vnd.ms-excel',
-    'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
-  ]
+const handleUploadClick = () => {
+  fileInputRef.value?.click()
+}
+
+const handleFileSelect = (event: Event) => {
+  const target = event.target as HTMLInputElement
+  const file = target.files?.[0]
+  if (!file) return
+
   const allowedExtensions = ['.txt', '.md', '.pdf', '.doc', '.docx', '.xls', '.xlsx']
   const ext = '.' + file.name.split('.').pop()?.toLowerCase()
 
   if (!allowedExtensions.includes(ext)) {
     ElMessage.error('不支持的文件格式')
-    return false
+    return
   }
 
   const maxSize = 50 * 1024 * 1024
   if (file.size > maxSize) {
     ElMessage.error('文件大小不能超过 50MB')
-    return false
+    return
   }
 
-  return true
-}
+  selectedFile.value = file
+  uploadForm.value.metadata = {}
+  uploadDialogVisible.value = true
 
-const handleUploadSuccess = (response: any) => {
-  if (response.jobId) {
-    ElMessage.success('文档上传成功，正在处理中...')
-    emit('upload-success')
-    loadDocuments()
-    pollJobStatus(response.jobId)
-  } else {
-    ElMessage.error('上传失败')
+  if (fileInputRef.value) {
+    fileInputRef.value.value = ''
   }
 }
 
-const handleUploadError = () => {
-  ElMessage.error('上传失败，请重试')
+const handleUpload = async () => {
+  if (!selectedFile.value) {
+    ElMessage.warning('请选择文件')
+    return
+  }
+
+  if (metadataFormRef.value) {
+    const validation = await metadataFormRef.value.validate()
+    if (!validation.valid) {
+      ElMessage.warning('请完善必填的元数据字段')
+      return
+    }
+  }
+
+  uploading.value = true
+  try {
+    const formData = new FormData()
+    formData.append('file', selectedFile.value)
+    formData.append('kb_id', props.kbId)
+    formData.append('metadata', JSON.stringify(uploadForm.value.metadata))
+
+    const baseUrl = import.meta.env.VITE_API_BASE_URL || ''
+    const response = await fetch(`${baseUrl}/admin/kb/documents`, {
+      method: 'POST',
+      headers: {
+        'X-Tenant-Id': tenantStore.currentTenantId
+      },
+      body: formData
+    })
+
+    const result = await response.json()
+    if (result.jobId) {
+      ElMessage.success('文档上传成功，正在处理中...')
+      emit('upload-success')
+      loadDocuments()
+      pollJobStatus(result.jobId)
+    } else {
+      ElMessage.error(result.message || '上传失败')
+    }
+  } catch (error) {
+    ElMessage.error('上传失败，请重试')
+  } finally {
+    uploading.value = false
+    uploadDialogVisible.value = false
+    selectedFile.value = null
+  }
+}
+
+const handleEditMetadata = (doc: DocumentWithMetadata) => {
+  currentEditDoc.value = doc
+  editForm.value.metadata = doc.metadata || {}
+  editDialogVisible.value = true
+}
+
+const handleSaveMetadata = async () => {
+  if (!currentEditDoc.value) return
+
+  if (editMetadataFormRef.value) {
+    const validation = await editMetadataFormRef.value.validate()
+    if (!validation.valid) {
+      ElMessage.warning('请完善必填的元数据字段')
+      return
+    }
+  }
+
+  saving.value = true
+  try {
+    const baseUrl = import.meta.env.VITE_API_BASE_URL || ''
+    const response = await fetch(`${baseUrl}/admin/kb/documents/${currentEditDoc.value.docId}/metadata`, {
+      method: 'PUT',
+      headers: {
+        'Content-Type': 'application/json',
+        'X-Tenant-Id': tenantStore.currentTenantId
+      },
+      body: JSON.stringify({ metadata: editForm.value.metadata })
+    })
+
+    if (response.ok) {
+      ElMessage.success('元数据更新成功')
+      loadDocuments()
+      editDialogVisible.value = false
+    } else {
+      const result = await response.json()
+      ElMessage.error(result.message || '更新失败')
+    }
+  } catch (error) {
+    ElMessage.error('更新失败，请重试')
+  } finally {
+    saving.value = false
+  }
 }
 
 const pollJobStatus = async (jobId: string) => {
@@ -208,7 +408,7 @@ const pollJobStatus = async (jobId: string) => {
   setTimeout(poll, 2000)
 }
 
-const handleDelete = async (row: Document) => {
+const handleDelete = async (row: DocumentWithMetadata) => {
   try {
     await ElMessageBox.confirm('确定要删除该文档吗？', '确认删除', {
       confirmButtonText: '确定',
@@ -245,4 +445,27 @@ onMounted(() => {
   display: flex;
   justify-content: flex-end;
 }
+
+.metadata-preview {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 4px;
+}
+
+.metadata-tag {
+  margin: 0;
+}
+
+.no-metadata {
+  color: var(--el-text-color-placeholder);
+}
+
+.file-info {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 12px;
+  background-color: var(--el-fill-color-light);
+  border-radius: 4px;
+}
 </style>
diff --git a/ai-service-admin/src/views/admin/metadata-schema/index.vue b/ai-service-admin/src/views/admin/metadata-schema/index.vue
new file mode 100644
index 0000000..b57068e
--- /dev/null
+++ b/ai-service-admin/src/views/admin/metadata-schema/index.vue
@@ -0,0 +1,587 @@
+<template>
+  <div class="metadata-schema-page">
+    <div class="page-header">
+      <div class="header-content">
+        <div class="title-section">
+          <h1 class="page-title">元数据字段配置</h1>
+          <p class="page-desc">配置知识库、意图规则、话术流程、Prompt模板的动态元数据字段。[AC-IDSMETA-13]</p>
+        </div>
+        <div class="header-actions">
+          <el-select v-model="filterStatus" placeholder="按状态筛选" clearable style="width: 140px;">
+            <el-option
+              v-for="opt in METADATA_STATUS_OPTIONS"
+              :key="opt.value"
+              :label="opt.label"
+              :value="opt.value"
+            />
+          </el-select>
+          <el-button type="primary" @click="handleCreate">
+            <el-icon><Plus /></el-icon>
+            新建字段
+          </el-button>
+        </div>
+      </div>
+    </div>
+
+    <el-card shadow="hover" class="schema-card" v-loading="loading">
+      <el-table :data="fields" stripe style="width: 100%">
+        <el-table-column prop="field_key" label="字段标识" min-width="120">
+          <template #default="{ row }">
+            <code class="field-key">{{ row.field_key }}</code>
+          </template>
+        </el-table-column>
+        <el-table-column prop="label" label="显示名称" width="120" />
+        <el-table-column prop="type" label="类型" width="100">
+          <template #default="{ row }">
+            <el-tag size="small" type="info">{{ getTypeLabel(row.type) }}</el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column prop="required" label="必填" width="80">
+          <template #default="{ row }">
+            <el-tag :type="row.required ? 'danger' : 'info'" size="small">
+              {{ row.required ? '必填' : '可选' }}
+            </el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column prop="scope" label="适用范围" min-width="180">
+          <template #default="{ row }">
+            <div class="scope-tags">
+              <el-tag
+                v-for="s in row.scope"
+                :key="s"
+                size="small"
+                class="scope-tag"
+              >
+                {{ getScopeLabel(s) }}
+              </el-tag>
+            </div>
+          </template>
+        </el-table-column>
+        <el-table-column prop="status" label="状态" width="100">
+          <template #default="{ row }">
+            <el-tag :type="STATUS_TAG_MAP[row.status as MetadataFieldStatus]" size="small">
+              {{ getStatusLabel(row.status) }}
+            </el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column label="操作" width="200" fixed="right">
+          <template #default="{ row }">
+            <el-button type="primary" link size="small" @click="handleEdit(row)">
+              <el-icon><Edit /></el-icon>
+              编辑
+            </el-button>
+            <el-dropdown trigger="click" @command="(cmd: MetadataFieldStatus) => handleStatusChange(row, cmd)">
+              <el-button type="warning" link size="small">
+                <el-icon><Switch /></el-icon>
+                状态
+                <el-icon class="el-icon--right"><ArrowDown /></el-icon>
+              </el-button>
+              <template #dropdown>
+                <el-dropdown-menu>
+                  <el-dropdown-item
+                    v-for="opt in METADATA_STATUS_OPTIONS"
+                    :key="opt.value"
+                    :command="opt.value"
+                    :disabled="opt.value === row.status"
+                  >
+                    <el-tag :type="STATUS_TAG_MAP[opt.value as MetadataFieldStatus]" size="small">{{ opt.label }}</el-tag>
+                    <span class="status-desc">{{ opt.description }}</span>
+                  </el-dropdown-item>
+                </el-dropdown-menu>
+              </template>
+            </el-dropdown>
+            <el-button type="danger" link size="small" @click="handleDelete(row)">
+              <el-icon><Delete /></el-icon>
+              删除
+            </el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+      <el-empty v-if="!loading && fields.length === 0" description="暂无元数据字段" />
+    </el-card>
+
+    <el-dialog
+      v-model="dialogVisible"
+      :title="isEdit ? '编辑元数据字段' : '新建元数据字段'"
+      width="700px"
+      :close-on-click-modal="false"
+      destroy-on-close
+    >
+      <el-form :model="formData" :rules="formRules" ref="formRef" label-width="100px">
+        <el-row :gutter="20">
+          <el-col :span="12">
+            <el-form-item label="字段标识" prop="field_key">
+              <el-input
+                v-model="formData.field_key"
+                placeholder="如：grade, subject"
+                :disabled="isEdit"
+              />
+              <div class="field-hint">仅允许小写字母、数字、下划线</div>
+            </el-form-item>
+          </el-col>
+          <el-col :span="12">
+            <el-form-item label="显示名称" prop="label">
+              <el-input v-model="formData.label" placeholder="如：年级" />
+            </el-form-item>
+          </el-col>
+        </el-row>
+        <el-row :gutter="20">
+          <el-col :span="12">
+            <el-form-item label="字段类型" prop="type">
+              <el-select v-model="formData.type" style="width: 100%;" @change="onTypeChange">
+                <el-option
+                  v-for="opt in METADATA_TYPE_OPTIONS"
+                  :key="opt.value"
+                  :label="opt.label"
+                  :value="opt.value"
+                />
+              </el-select>
+            </el-form-item>
+          </el-col>
+          <el-col :span="12">
+            <el-form-item label="状态" prop="status">
+              <el-select v-model="formData.status" style="width: 100%;">
+                <el-option
+                  v-for="opt in METADATA_STATUS_OPTIONS"
+                  :key="opt.value"
+                  :label="opt.label"
+                  :value="opt.value"
+                >
+                  <div class="status-option">
+                    <el-tag :type="STATUS_TAG_MAP[opt.value as MetadataFieldStatus]" size="small">{{ opt.label }}</el-tag>
+                    <span class="status-option-desc">{{ opt.description }}</span>
+                  </div>
+                </el-option>
+              </el-select>
+            </el-form-item>
+          </el-col>
+        </el-row>
+        <el-form-item label="适用范围" prop="scope">
+          <el-checkbox-group v-model="formData.scope">
+            <el-checkbox
+              v-for="opt in METADATA_SCOPE_OPTIONS"
+              :key="opt.value"
+              :label="opt.value"
+            >
+              {{ opt.label }}
+            </el-checkbox>
+          </el-checkbox-group>
+        </el-form-item>
+        <el-row :gutter="20">
+          <el-col :span="8">
+            <el-form-item label="是否必填">
+              <el-switch v-model="formData.required" />
+            </el-form-item>
+          </el-col>
+          <el-col :span="8">
+            <el-form-item label="可过滤">
+              <el-switch v-model="formData.is_filterable" />
+            </el-form-item>
+          </el-col>
+          <el-col :span="8">
+            <el-form-item label="排序特征">
+              <el-switch v-model="formData.is_rank_feature" />
+            </el-form-item>
+          </el-col>
+        </el-row>
+        <el-form-item label="默认值">
+          <el-input v-model="formData.default_value" placeholder="可选默认值" />
+        </el-form-item>
+        <el-form-item
+          v-if="formData.type === 'enum' || formData.type === 'array_enum'"
+          label="选项列表"
+          prop="options"
+        >
+          <div class="options-container">
+            <el-tag
+              v-for="(opt, idx) in formData.options"
+              :key="idx"
+              closable
+              @close="removeOption(idx)"
+              class="option-tag"
+            >
+              {{ opt }}
+            </el-tag>
+            <el-input
+              v-model="newOption"
+              placeholder="输入后回车添加"
+              size="small"
+              class="option-input"
+              @keyup.enter="addOption"
+            />
+          </div>
+        </el-form-item>
+
+        <el-divider content-position="left" v-if="isEdit && formData.status === 'deprecated'">
+          <el-tag type="danger">废弃影响范围</el-tag>
+        </el-divider>
+        <div v-if="isEdit && formData.status === 'deprecated'" class="deprecated-impact">
+          <el-alert type="warning" :closable="false" show-icon>
+            <template #title>
+              将此字段设为废弃后，以下影响将生效 [AC-IDSMETA-14]
+            </template>
+          </el-alert>
+          <ul class="impact-list">
+            <li>新建对象时，此字段将不再显示</li>
+            <li>已有对象的历史数据仍可查看，但不可编辑</li>
+            <li>作为过滤条件时，仅对历史数据生效</li>
+          </ul>
+        </div>
+      </el-form>
+      <template #footer>
+        <el-button @click="dialogVisible = false">取消</el-button>
+        <el-button type="primary" :loading="submitting" @click="handleSubmit">
+          {{ isEdit ? '保存' : '创建' }}
+        </el-button>
+      </template>
+    </el-dialog>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, reactive, onMounted, watch } from 'vue'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import { Plus, Edit, Delete, Switch, ArrowDown } from '@element-plus/icons-vue'
+import type { FormInstance, FormRules } from 'element-plus'
+import { metadataSchemaApi } from '@/api/metadata-schema'
+import {
+  METADATA_STATUS_OPTIONS,
+  METADATA_SCOPE_OPTIONS,
+  METADATA_TYPE_OPTIONS,
+  STATUS_TAG_MAP,
+  type MetadataFieldDefinition,
+  type MetadataFieldCreateRequest,
+  type MetadataFieldUpdateRequest,
+  type MetadataFieldStatus,
+  type MetadataScope
+} from '@/types/metadata'
+
+const loading = ref(false)
+const fields = ref<MetadataFieldDefinition[]>([])
+const filterStatus = ref<MetadataFieldStatus | ''>('')
+const dialogVisible = ref(false)
+const isEdit = ref(false)
+const submitting = ref(false)
+const formRef = ref<FormInstance>()
+const newOption = ref('')
+
+const formData = reactive({
+  id: '',
+  field_key: '',
+  label: '',
+  type: 'string' as 'string' | 'number' | 'boolean' | 'enum' | 'array_enum',
+  required: false,
+  options: [] as string[],
+  default_value: '' as string | number | boolean,
+  scope: [] as MetadataScope[],
+  is_filterable: true,
+  is_rank_feature: false,
+  status: 'draft' as MetadataFieldStatus
+})
+
+const formRules: FormRules = {
+  field_key: [
+    { required: true, message: '请输入字段标识', trigger: 'blur' },
+    { pattern: /^[a-z0-9_]+$/, message: '仅允许小写字母、数字、下划线', trigger: 'blur' }
+  ],
+  label: [{ required: true, message: '请输入显示名称', trigger: 'blur' }],
+  type: [{ required: true, message: '请选择字段类型', trigger: 'change' }],
+  status: [{ required: true, message: '请选择状态', trigger: 'change' }],
+  scope: [{ type: 'array', min: 1, message: '请至少选择一个适用范围', trigger: 'change' }],
+  options: [
+    {
+      validator: (_rule, value, callback) => {
+        if ((formData.type === 'enum' || formData.type === 'array_enum') && (!value || value.length === 0)) {
+          callback(new Error('枚举类型必须至少有一个选项'))
+        } else {
+          callback()
+        }
+      },
+      trigger: 'change'
+    }
+  ]
+}
+
+const getTypeLabel = (type: string) => {
+  return METADATA_TYPE_OPTIONS.find(o => o.value === type)?.label || type
+}
+
+const getStatusLabel = (status: MetadataFieldStatus) => {
+  return METADATA_STATUS_OPTIONS.find(o => o.value === status)?.label || status
+}
+
+const getScopeLabel = (scope: MetadataScope) => {
+  return METADATA_SCOPE_OPTIONS.find(o => o.value === scope)?.label || scope
+}
+
+const fetchFields = async () => {
+  loading.value = true
+  try {
+    const res = await metadataSchemaApi.list(filterStatus.value || undefined)
+    fields.value = res.items || []
+  } catch (error: any) {
+    ElMessage.error(error.response?.data?.message || '获取元数据字段失败')
+  } finally {
+    loading.value = false
+  }
+}
+
+const handleCreate = () => {
+  isEdit.value = false
+  Object.assign(formData, {
+    id: '',
+    field_key: '',
+    label: '',
+    type: 'string',
+    required: false,
+    options: [],
+    default_value: '',
+    scope: [],
+    is_filterable: true,
+    is_rank_feature: false,
+    status: 'draft'
+  })
+  dialogVisible.value = true
+}
+
+const handleEdit = (field: MetadataFieldDefinition) => {
+  isEdit.value = true
+  Object.assign(formData, {
+    id: field.id,
+    field_key: field.field_key,
+    label: field.label,
+    type: field.type,
+    required: field.required,
+    options: field.options || [],
+    default_value: field.default ?? '',
+    scope: [...field.scope],
+    is_filterable: field.is_filterable,
+    is_rank_feature: field.is_rank_feature,
+    status: field.status
+  })
+  dialogVisible.value = true
+}
+
+const handleDelete = async (field: MetadataFieldDefinition) => {
+  try {
+    await ElMessageBox.confirm(
+      `确定要删除字段「${field.label}(${field.field_key})」吗？`,
+      '删除确认',
+      { type: 'warning' }
+    )
+    await metadataSchemaApi.delete(field.id)
+    ElMessage.success('删除成功')
+    fetchFields()
+  } catch (error: any) {
+    if (error !== 'cancel') {
+      ElMessage.error(error.response?.data?.message || '删除失败')
+    }
+  }
+}
+
+const handleStatusChange = async (field: MetadataFieldDefinition, newStatus: MetadataFieldStatus) => {
+  if (newStatus === field.status) return
+
+  const statusDesc = METADATA_STATUS_OPTIONS.find(o => o.value === newStatus)?.description
+  try {
+    await ElMessageBox.confirm(
+      `确定要将字段「${field.label}」状态改为「${getStatusLabel(newStatus)}」吗？\n\n${statusDesc}`,
+      '状态变更确认',
+      { type: 'warning' }
+    )
+    await metadataSchemaApi.update(field.id, { status: newStatus })
+    ElMessage.success('状态更新成功')
+    fetchFields()
+  } catch (error: any) {
+    if (error !== 'cancel') {
+      ElMessage.error(error.response?.data?.message || '状态更新失败')
+    }
+  }
+}
+
+const onTypeChange = () => {
+  if (formData.type !== 'enum' && formData.type !== 'array_enum') {
+    formData.options = []
+  }
+}
+
+const addOption = () => {
+  const value = newOption.value.trim()
+  if (value && !formData.options.includes(value)) {
+    formData.options.push(value)
+    newOption.value = ''
+  }
+}
+
+const removeOption = (index: number) => {
+  formData.options.splice(index, 1)
+}
+
+const handleSubmit = async () => {
+  if (!formRef.value) return
+
+  await formRef.value.validate(async (valid) => {
+    if (!valid) return
+
+    submitting.value = true
+    try {
+      const data: MetadataFieldCreateRequest | MetadataFieldUpdateRequest = {
+        field_key: formData.field_key,
+        label: formData.label,
+        type: formData.type,
+        required: formData.required,
+        scope: formData.scope,
+        is_filterable: formData.is_filterable,
+        is_rank_feature: formData.is_rank_feature,
+        status: formData.status
+      }
+
+      if (formData.type === 'enum' || formData.type === 'array_enum') {
+        data.options = formData.options
+      }
+
+      if (formData.default_value !== '') {
+        data.default = formData.default_value
+      }
+
+      if (isEdit.value) {
+        await metadataSchemaApi.update(formData.id, data as MetadataFieldUpdateRequest)
+        ElMessage.success('更新成功')
+      } else {
+        await metadataSchemaApi.create(data as MetadataFieldCreateRequest)
+        ElMessage.success('创建成功')
+      }
+
+      dialogVisible.value = false
+      fetchFields()
+    } catch (error: any) {
+      ElMessage.error(error.response?.data?.message || '操作失败')
+    } finally {
+      submitting.value = false
+    }
+  })
+}
+
+watch(filterStatus, () => {
+  fetchFields()
+})
+
+onMounted(() => {
+  fetchFields()
+})
+</script>
+
+<style scoped lang="scss">
+.metadata-schema-page {
+  padding: 20px;
+}
+
+.page-header {
+  margin-bottom: 24px;
+}
+
+.header-content {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+}
+
+.title-section {
+  .page-title {
+    font-size: 24px;
+    font-weight: 600;
+    margin: 0 0 8px 0;
+    color: var(--el-text-color-primary);
+  }
+
+  .page-desc {
+    font-size: 14px;
+    color: var(--el-text-color-secondary);
+    margin: 0;
+  }
+}
+
+.header-actions {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.schema-card {
+  border-radius: 8px;
+}
+
+.field-key {
+  padding: 2px 6px;
+  background-color: var(--el-fill-color-light);
+  border-radius: 4px;
+  font-family: monospace;
+  font-size: 12px;
+}
+
+.scope-tags {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 4px;
+}
+
+.scope-tag {
+  margin: 0;
+}
+
+.field-hint {
+  margin-top: 4px;
+  font-size: 12px;
+  color: var(--el-text-color-secondary);
+}
+
+.status-desc {
+  margin-left: 8px;
+  font-size: 12px;
+  color: var(--el-text-color-secondary);
+}
+
+.status-option {
+  display: flex;
+  align-items: center;
+}
+
+.status-option-desc {
+  margin-left: 8px;
+  font-size: 12px;
+  color: var(--el-text-color-secondary);
+}
+
+.options-container {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  align-items: center;
+
+  .option-tag {
+    margin: 0;
+  }
+
+  .option-input {
+    width: 150px;
+  }
+}
+
+.deprecated-impact {
+  margin-top: 16px;
+  padding: 12px;
+  background-color: var(--el-color-warning-light-9);
+  border-radius: 6px;
+}
+
+.impact-list {
+  margin: 12px 0 0 0;
+  padding-left: 20px;
+  color: var(--el-text-color-regular);
+  font-size: 13px;
+
+  li {
+    margin-bottom: 4px;
+  }
+}
+</style>
diff --git a/ai-service-admin/src/views/admin/monitoring/ConversationTracking.vue b/ai-service-admin/src/views/admin/monitoring/ConversationTracking.vue
index 5c1c17c..9fd650a 100644
--- a/ai-service-admin/src/views/admin/monitoring/ConversationTracking.vue
+++ b/ai-service-admin/src/views/admin/monitoring/ConversationTracking.vue
@@ -248,7 +248,6 @@ import {
   type ConversationDetail,
   type ExportTaskResponse
 } from '@/api/monitoring'
-import request from '@/utils/request'
 
 const loading = ref(false)
 const tableData = ref<ConversationItem[]>([])
@@ -433,7 +432,8 @@ const downloadExport = () => {
   if (exportTask.value) {
     const url = getExportDownloadUrl(exportTask.value.taskId)
     const link = document.createElement('a')
-    link.href = request.defaults.baseURL + url
+    const baseURL = import.meta.env.VITE_APP_BASE_API || '/api'
+    link.href = baseURL + url
     link.download = exportTask.value.fileName || 'export.json'
     document.body.appendChild(link)
     link.click()
diff --git a/ai-service-admin/src/views/admin/prompt-template/index.vue b/ai-service-admin/src/views/admin/prompt-template/index.vue
index 4e38aea..8b31bb8 100644
--- a/ai-service-admin/src/views/admin/prompt-template/index.vue
+++ b/ai-service-admin/src/views/admin/prompt-template/index.vue
@@ -4,7 +4,7 @@
       <div class="header-content">
         <div class="title-section">
           <h1 class="page-title">Prompt 模板管理</h1>
-          <p class="page-desc">管理不同场景的 Prompt 模板，支持版本管理和一键回滚。</p>
+          <p class="page-desc">管理不同场景的 Prompt 模板，支持版本管理和一键回滚。[AC-IDSMETA-16]</p>
         </div>
         <div class="header-actions">
           <el-select v-model="filterScene" placeholder="按场景筛选" clearable style="width: 150px;">
@@ -43,6 +43,14 @@
             <span v-else class="no-version">未发布</span>
           </template>
         </el-table-column>
+        <el-table-column label="元数据" width="120">
+          <template #default="{ row }">
+            <el-tag v-if="row.metadata && Object.keys(row.metadata).length > 0" size="small" type="info">
+              {{ Object.keys(row.metadata).length }} 个字段
+            </el-tag>
+            <span v-else class="no-metadata">-</span>
+          </template>
+        </el-table-column>
         <el-table-column prop="updated_at" label="更新时间" width="180">
           <template #default="{ row }">
             {{ formatDate(row.updated_at) }}
@@ -78,7 +86,7 @@
     <el-dialog
       v-model="dialogVisible"
       :title="isEdit ? '编辑模板' : '新建模板'"
-      width="900px"
+      width="950px"
       :close-on-click-modal="false"
       destroy-on-close
     >
@@ -100,6 +108,19 @@
         <el-form-item label="描述">
           <el-input v-model="formData.description" type="textarea" :rows="2" placeholder="请输入模板描述（可选）" />
         </el-form-item>
+
+        <el-divider content-position="left">元数据配置 [AC-IDSMETA-16]</el-divider>
+
+        <MetadataForm
+          ref="metadataFormRef"
+          scope="prompt_template"
+          v-model="formData.metadata"
+          :is-new-object="!isEdit"
+          :col-span="8"
+        />
+
+        <el-divider content-position="left">系统指令</el-divider>
+
         <el-form-item label="系统指令" prop="system_instruction">
           <div class="content-editor">
             <div class="editor-main">
@@ -183,6 +204,7 @@ import {
   publishPromptTemplate,
   rollbackPromptTemplate
 } from '@/api/prompt-template'
+import { MetadataForm } from '@/components/metadata'
 import { SCENE_OPTIONS, BUILTIN_VARIABLES } from '@/types/prompt-template'
 import type { PromptTemplate, PromptTemplateDetail, PromptTemplateCreate, PromptTemplateUpdate, PromptVariable } from '@/types/prompt-template'
 import TemplateDetail from './components/TemplateDetail.vue'
@@ -197,6 +219,7 @@ const detailDrawer = ref(false)
 const isEdit = ref(false)
 const submitting = ref(false)
 const formRef = ref()
+const metadataFormRef = ref()
 const currentTemplate = ref<PromptTemplateDetail | null>(null)
 const currentEditId = ref('')
 const previewDialogVisible = ref(false)
@@ -208,7 +231,8 @@ const formData = ref<PromptTemplateCreate>({
   scene: '',
   description: '',
   system_instruction: '',
-  variables: []
+  variables: [],
+  metadata: {}
 })
 
 const formRules = {
@@ -270,7 +294,8 @@ const handleCreate = () => {
     scene: '',
     description: '',
     system_instruction: '',
-    variables: []
+    variables: [],
+    metadata: {}
   }
   dialogVisible.value = true
 }
@@ -285,7 +310,8 @@ const handleEdit = async (row: PromptTemplate) => {
       scene: detail.scene,
       description: detail.description || '',
       system_instruction: detail.current_content || '',
-      variables: detail.variables || []
+      variables: detail.variables || [],
+      metadata: detail.metadata || {}
     }
     dialogVisible.value = true
   } catch (error) {
@@ -358,6 +384,14 @@ const handleSubmit = async () => {
     return
   }
 
+  if (metadataFormRef.value) {
+    const validation = await metadataFormRef.value.validate()
+    if (!validation.valid) {
+      ElMessage.warning('请完善必填的元数据字段')
+      return
+    }
+  }
+
   submitting.value = true
   try {
     if (isEdit.value) {
@@ -366,7 +400,8 @@ const handleSubmit = async () => {
         scene: formData.value.scene,
         description: formData.value.description,
         system_instruction: formData.value.system_instruction,
-        variables: formData.value.variables
+        variables: formData.value.variables,
+        metadata: formData.value.metadata
       }
       await updatePromptTemplate(currentEditId.value, updateData)
       ElMessage.success('保存成功')
@@ -509,6 +544,10 @@ onMounted(() => {
   font-size: 12px;
 }
 
+.no-metadata {
+  color: var(--el-text-color-placeholder);
+}
+
 .content-editor {
   display: flex;
   gap: 16px;
diff --git a/ai-service-admin/src/views/admin/script-flow/components/ConstraintManager.vue b/ai-service-admin/src/views/admin/script-flow/components/ConstraintManager.vue
new file mode 100644
index 0000000..3cec6bc
--- /dev/null
+++ b/ai-service-admin/src/views/admin/script-flow/components/ConstraintManager.vue
@@ -0,0 +1,142 @@
+<template>
+  <div class="constraint-manager">
+    <div class="constraint-tags" v-if="modelValue && modelValue.length > 0">
+      <el-tag
+        v-for="(constraint, index) in modelValue"
+        :key="index"
+        closable
+        type="info"
+        @close="removeConstraint(index)"
+        class="constraint-tag"
+        :title="constraint"
+      >
+        <span class="constraint-text">{{ constraint }}</span>
+      </el-tag>
+    </div>
+
+    <el-input
+      v-model="newConstraint"
+      placeholder="输入约束条件后按回车添加"
+      @keyup.enter="addConstraint"
+      class="constraint-input"
+      size="small"
+    >
+      <template #append>
+        <el-button @click="addConstraint" :disabled="!newConstraint.trim()">
+          添加
+        </el-button>
+      </template>
+    </el-input>
+
+    <div class="constraint-presets">
+      <span class="preset-label">常用约束：</span>
+      <el-button
+        v-for="preset in PRESET_CONSTRAINTS"
+        :key="preset"
+        size="small"
+        round
+        @click="addPreset(preset)"
+        :disabled="modelValue?.includes(preset)"
+      >
+        {{ preset }}
+      </el-button>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref } from 'vue'
+import { PRESET_CONSTRAINTS } from '@/types/script-flow'
+
+const props = defineProps<{
+  modelValue?: string[]
+}>()
+
+const emit = defineEmits<{
+  (e: 'update:modelValue', value: string[]): void
+}>()
+
+const newConstraint = ref('')
+
+const addConstraint = () => {
+  const value = newConstraint.value.trim()
+  if (!value) return
+  
+  const currentConstraints = props.modelValue || []
+  if (currentConstraints.includes(value)) {
+    newConstraint.value = ''
+    return
+  }
+  
+  emit('update:modelValue', [...currentConstraints, value])
+  newConstraint.value = ''
+}
+
+const removeConstraint = (index: number) => {
+  const currentConstraints = props.modelValue || []
+  const newConstraints = [...currentConstraints]
+  newConstraints.splice(index, 1)
+  emit('update:modelValue', newConstraints)
+}
+
+const addPreset = (preset: string) => {
+  const currentConstraints = props.modelValue || []
+  if (currentConstraints.includes(preset)) return
+  emit('update:modelValue', [...currentConstraints, preset])
+}
+</script>
+
+<style scoped>
+.constraint-manager {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.constraint-tags {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.constraint-tag {
+  max-width: 100%;
+  display: inline-flex;
+  align-items: center;
+}
+
+.constraint-tag :deep(.el-tag__content) {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  max-width: 250px;
+}
+
+.constraint-tag :deep(.el-tag__close) {
+  flex-shrink: 0;
+  margin-left: 4px;
+}
+
+.constraint-text {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  max-width: 250px;
+}
+
+.constraint-input {
+  max-width: 400px;
+}
+
+.constraint-presets {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.preset-label {
+  font-size: 12px;
+  color: var(--el-text-color-secondary);
+}
+</style>
diff --git a/ai-service-admin/src/views/admin/script-flow/index.vue b/ai-service-admin/src/views/admin/script-flow/index.vue
index 5898535..33dbfe5 100644
--- a/ai-service-admin/src/views/admin/script-flow/index.vue
+++ b/ai-service-admin/src/views/admin/script-flow/index.vue
@@ -4,7 +4,7 @@
       <div class="header-content">
         <div class="title-section">
           <h1 class="page-title">话术流程管理</h1>
-          <p class="page-desc">编排多步骤的话术流程，引导用户按固定步骤完成信息收集。</p>
+          <p class="page-desc">编排多步骤的话术流程，引导用户按固定步骤完成信息收集。[AC-IDSMETA-16]</p>
         </div>
         <div class="header-actions">
           <el-button type="primary" @click="handleCreate">
@@ -25,6 +25,14 @@
         </el-table-column>
         <el-table-column prop="step_count" label="步骤数" width="100" />
         <el-table-column prop="linked_rule_count" label="关联规则" width="100" />
+        <el-table-column label="元数据" width="120">
+          <template #default="{ row }">
+            <el-tag v-if="row.metadata && Object.keys(row.metadata).length > 0" size="small" type="info">
+              {{ Object.keys(row.metadata).length }} 个字段
+            </el-tag>
+            <span v-else class="no-metadata">-</span>
+          </template>
+        </el-table-column>
         <el-table-column prop="is_enabled" label="状态" width="80">
           <template #default="{ row }">
             <el-switch
@@ -65,7 +73,7 @@
     <el-dialog
       v-model="dialogVisible"
       :title="isEdit ? '编辑流程' : '新建流程'"
-      width="900px"
+      width="950px"
       :close-on-click-modal="false"
       destroy-on-close
     >
@@ -86,6 +94,16 @@
           <el-input v-model="formData.description" type="textarea" :rows="2" placeholder="请输入描述（可选）" />
         </el-form-item>
 
+        <el-divider content-position="left">元数据配置 [AC-IDSMETA-16]</el-divider>
+
+        <MetadataForm
+          ref="metadataFormRef"
+          scope="script_flow"
+          v-model="formData.metadata"
+          :is-new-object="!isEdit"
+          :col-span="8"
+        />
+
         <el-divider content-position="left">步骤配置</el-divider>
 
         <div class="steps-editor">
@@ -107,14 +125,107 @@
                   </el-button>
                 </div>
                 <div class="step-content">
-                  <el-form-item label="话术内容">
-                    <el-input
-                      v-model="element.content"
-                      type="textarea"
-                      :rows="3"
-                      placeholder="请输入话术内容，支持 {{variable}} 占位符"
-                    />
+                  <el-form-item label="话术模式">
+                    <el-radio-group v-model="element.script_mode" size="small">
+                      <el-radio-button
+                        v-for="opt in SCRIPT_MODE_OPTIONS"
+                        :key="opt.value"
+                        :value="opt.value"
+                      >
+                        <el-tooltip :content="opt.description" placement="top">
+                          <span>{{ opt.label }} <el-icon class="mode-help-icon"><QuestionFilled /></el-icon></span>
+                        </el-tooltip>
+                      </el-radio-button>
+                    </el-radio-group>
                   </el-form-item>
+
+                  <template v-if="element.script_mode === 'fixed'">
+                    <el-form-item label="话术内容" required>
+                      <el-input
+                        v-model="element.content"
+                        type="textarea"
+                        :rows="3"
+                        placeholder="请输入固定话术内容"
+                      />
+                    </el-form-item>
+                  </template>
+
+                  <template v-if="element.script_mode === 'flexible'">
+                    <el-form-item label="步骤意图" required>
+                      <el-input
+                        v-model="element.intent"
+                        placeholder="例如：获取用户姓名"
+                      />
+                    </el-form-item>
+
+                    <el-form-item label="意图说明">
+                      <el-input
+                        v-model="element.intent_description"
+                        type="textarea"
+                        :rows="2"
+                        placeholder="详细描述这一步的目的和期望效果"
+                      />
+                    </el-form-item>
+
+                    <el-form-item label="话术约束">
+                      <ConstraintManager v-model="element.script_constraints" />
+                    </el-form-item>
+
+                    <el-form-item label="Fallback话术" required>
+                      <el-input
+                        v-model="element.content"
+                        type="textarea"
+                        :rows="2"
+                        placeholder="AI生成失败时使用的备用话术"
+                      />
+                    </el-form-item>
+
+                    <el-form-item label="期望变量">
+                      <el-select
+                        v-model="element.expected_variables"
+                        multiple
+                        filterable
+                        allow-create
+                        default-first-option
+                        placeholder="输入变量名后回车添加"
+                        style="width: 100%"
+                      />
+                    </el-form-item>
+                  </template>
+
+                  <template v-if="element.script_mode === 'template'">
+                    <el-form-item label="话术模板" required>
+                      <el-input
+                        v-model="element.content"
+                        type="textarea"
+                        :rows="3"
+                        placeholder="使用 {变量名} 标记可变部分，例如：您好{user_name}，请问您{inquiry_style}？"
+                      />
+                      <div class="template-hint">
+                        提示：使用 {变量名} 标记需要AI填充的部分
+                      </div>
+                    </el-form-item>
+
+                    <el-form-item label="步骤意图">
+                      <el-input
+                        v-model="element.intent"
+                        placeholder="可选：描述模板的使用场景"
+                      />
+                    </el-form-item>
+
+                    <el-form-item label="期望变量">
+                      <el-select
+                        v-model="element.expected_variables"
+                        multiple
+                        filterable
+                        allow-create
+                        default-first-option
+                        placeholder="输入变量名后回车添加"
+                        style="width: 100%"
+                      />
+                    </el-form-item>
+                  </template>
+
                   <el-row :gutter="16">
                     <el-col :span="8">
                       <el-form-item label="等待输入">
@@ -139,6 +250,78 @@
                       </el-form-item>
                     </el-col>
                   </el-row>
+
+                  <el-divider content-position="left" v-if="element.wait_input">分支跳转</el-divider>
+
+                  <div v-if="element.wait_input" class="branch-editor">
+                    <div
+                      v-for="(cond, ci) in (element.next_conditions || [])"
+                      :key="ci"
+                      class="branch-item"
+                    >
+                      <el-row :gutter="8" align="middle">
+                        <el-col :span="10">
+                          <el-form-item label="关键词" label-width="60px" style="margin-bottom: 0;">
+                            <el-select
+                              v-model="cond.keywords"
+                              multiple
+                              filterable
+                              allow-create
+                              default-first-option
+                              placeholder="输入关键词回车"
+                              style="width: 100%"
+                              size="small"
+                            />
+                          </el-form-item>
+                        </el-col>
+                        <el-col :span="6">
+                          <el-form-item label="正则" label-width="40px" style="margin-bottom: 0;">
+                            <el-input
+                              v-model="cond.pattern"
+                              placeholder="可选"
+                              size="small"
+                            />
+                          </el-form-item>
+                        </el-col>
+                        <el-col :span="5">
+                          <el-form-item label="跳转" label-width="40px" style="margin-bottom: 0;">
+                            <el-select v-model="cond.goto_step" placeholder="步骤" size="small" style="width: 100%">
+                              <el-option
+                                v-for="(s, si) in formData.steps"
+                                :key="si"
+                                :label="'步骤 ' + (si + 1)"
+                                :value="si + 1"
+                                :disabled="si === index"
+                              />
+                            </el-select>
+                          </el-form-item>
+                        </el-col>
+                        <el-col :span="3">
+                          <el-button type="danger" link size="small" @click="removeBranch(element, ci)">删除</el-button>
+                        </el-col>
+                      </el-row>
+                    </div>
+                    <el-row :gutter="8" align="middle" style="margin-top: 8px;">
+                      <el-col :span="16">
+                        <el-button type="primary" link size="small" @click="addBranch(element)">
+                          <el-icon><Plus /></el-icon> 添加分支条件
+                        </el-button>
+                      </el-col>
+                      <el-col :span="8">
+                        <el-form-item label="默认跳转" label-width="70px" style="margin-bottom: 0;">
+                          <el-select v-model="element.default_next" placeholder="顺序" size="small" clearable style="width: 100%">
+                            <el-option
+                              v-for="(s, si) in formData.steps"
+                              :key="si"
+                              :label="'步骤 ' + (si + 1)"
+                              :value="si + 1"
+                              :disabled="si === index"
+                            />
+                          </el-select>
+                        </el-form-item>
+                      </el-col>
+                    </el-row>
+                  </div>
                 </div>
               </div>
             </template>
@@ -172,7 +355,7 @@
 <script setup lang="ts">
 import { ref, onMounted } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { Plus, Edit, Delete, View, Rank, VideoPlay } from '@element-plus/icons-vue'
+import { Plus, Edit, Delete, View, Rank, VideoPlay, QuestionFilled } from '@element-plus/icons-vue'
 import draggable from 'vuedraggable'
 import {
   listScriptFlows,
@@ -181,10 +364,12 @@ import {
   deleteScriptFlow,
   getScriptFlow
 } from '@/api/script-flow'
-import { TIMEOUT_ACTION_OPTIONS } from '@/types/script-flow'
-import type { ScriptFlow, ScriptFlowDetail, ScriptFlowCreate, ScriptFlowUpdate, FlowStep } from '@/types/script-flow'
+import { MetadataForm } from '@/components/metadata'
+import { TIMEOUT_ACTION_OPTIONS, SCRIPT_MODE_OPTIONS } from '@/types/script-flow'
+import type { ScriptFlow, ScriptFlowDetail, ScriptFlowCreate, ScriptFlowUpdate, FlowStep, ScriptMode } from '@/types/script-flow'
 import FlowPreview from './components/FlowPreview.vue'
 import SimulateDialog from './components/SimulateDialog.vue'
+import ConstraintManager from './components/ConstraintManager.vue'
 
 const loading = ref(false)
 const flows = ref<ScriptFlow[]>([])
@@ -196,6 +381,7 @@ const currentSimulateFlowName = ref('')
 const isEdit = ref(false)
 const submitting = ref(false)
 const formRef = ref()
+const metadataFormRef = ref()
 const currentFlow = ref<ScriptFlowDetail | null>(null)
 const currentEditId = ref('')
 
@@ -205,7 +391,8 @@ const defaultFormData = (): ScriptFlowCreate => ({
   name: '',
   description: '',
   steps: [],
-  is_enabled: true
+  is_enabled: true,
+  metadata: {}
 })
 
 const formData = ref<ScriptFlowCreate>(defaultFormData())
@@ -253,8 +440,14 @@ const handleEdit = async (row: ScriptFlow) => {
     formData.value = {
       name: detail.name,
       description: detail.description || '',
-      steps: detail.steps || [],
-      is_enabled: detail.is_enabled
+      steps: (detail.steps || []).map(step => ({
+        ...step,
+        script_mode: step.script_mode || 'fixed',
+        script_constraints: step.script_constraints || [],
+        expected_variables: step.expected_variables || []
+      })),
+      is_enabled: detail.is_enabled,
+      metadata: detail.metadata || {}
     }
     dialogVisible.value = true
   } catch (error) {
@@ -312,17 +505,47 @@ const addStep = () => {
     wait_input: true,
     timeout_seconds: 30,
     timeout_action: 'repeat',
-    next_conditions: []
+    next_conditions: [],
+    script_mode: 'fixed',
+    script_constraints: [],
+    expected_variables: []
   })
 }
 
 const removeStep = (index: number) => {
+  const removedStepNo = index + 1
   formData.value.steps.splice(index, 1)
   formData.value.steps.forEach((step, i) => {
     step.step_no = i + 1
+    if (step.next_conditions) {
+      step.next_conditions = step.next_conditions
+        .filter(c => c.goto_step !== removedStepNo)
+        .map(c => ({
+          ...c,
+          goto_step: c.goto_step > removedStepNo ? c.goto_step - 1 : c.goto_step
+        }))
+    }
+    if (step.default_next !== undefined && step.default_next !== null) {
+      if (step.default_next === removedStepNo) {
+        step.default_next = undefined
+      } else if (step.default_next > removedStepNo) {
+        step.default_next = step.default_next - 1
+      }
+    }
   })
 }
 
+const addBranch = (step: FlowStep) => {
+  if (!step.next_conditions) {
+    step.next_conditions = []
+  }
+  step.next_conditions.push({ keywords: [], goto_step: 0 })
+}
+
+const removeBranch = (step: FlowStep, index: number) => {
+  step.next_conditions?.splice(index, 1)
+}
+
 const handleSubmit = async () => {
   try {
     await formRef.value.validate()
@@ -330,11 +553,45 @@ const handleSubmit = async () => {
     return
   }
 
+  if (metadataFormRef.value) {
+    const validation = await metadataFormRef.value.validate()
+    if (!validation.valid) {
+      ElMessage.warning('请完善必填的元数据字段')
+      return
+    }
+  }
+
   if (formData.value.steps.length === 0) {
     ElMessage.warning('请至少添加一个步骤')
     return
   }
 
+  for (let i = 0; i < formData.value.steps.length; i++) {
+    const step = formData.value.steps[i]
+    const stepLabel = `步骤 ${i + 1}`
+
+    if (step.script_mode === 'fixed' && !step.content?.trim()) {
+      ElMessage.warning(`${stepLabel}：固定模式需要填写话术内容`)
+      return
+    }
+
+    if (step.script_mode === 'flexible') {
+      if (!step.intent?.trim()) {
+        ElMessage.warning(`${stepLabel}：灵活模式需要填写步骤意图`)
+        return
+      }
+      if (!step.content?.trim()) {
+        ElMessage.warning(`${stepLabel}：灵活模式需要填写Fallback话术`)
+        return
+      }
+    }
+
+    if (step.script_mode === 'template' && !step.content?.trim()) {
+      ElMessage.warning(`${stepLabel}：模板模式需要填写话术模板`)
+      return
+    }
+  }
+
   submitting.value = true
   try {
     const submitData = {
@@ -412,6 +669,10 @@ onMounted(() => {
   border-radius: 8px;
 }
 
+.no-metadata {
+  color: var(--el-text-color-placeholder);
+}
+
 .steps-editor {
   max-height: 400px;
   overflow-y: auto;
@@ -450,4 +711,32 @@ onMounted(() => {
 .step-content {
   padding: 16px;
 }
+
+.template-hint {
+  margin-top: 8px;
+  font-size: 12px;
+  color: var(--el-text-color-secondary);
+}
+
+.mode-help-icon {
+  margin-left: 4px;
+  font-size: 12px;
+  color: var(--el-text-color-secondary);
+  vertical-align: middle;
+}
+
+.branch-editor {
+  padding: 12px;
+  background-color: var(--el-fill-color-lighter);
+  border-radius: 6px;
+  margin-top: 8px;
+}
+
+.branch-item {
+  padding: 8px;
+  background-color: var(--el-bg-color);
+  border: 1px solid var(--el-border-color-light);
+  border-radius: 4px;
+  margin-bottom: 8px;
+}
 </style>
diff --git a/ai-service/app/api/admin/__init__.py b/ai-service/app/api/admin/__init__.py
index 843de88..2091088 100644
--- a/ai-service/app/api/admin/__init__.py
+++ b/ai-service/app/api/admin/__init__.py
@@ -5,12 +5,15 @@ Admin API routes for AI Service management.
 
 from app.api.admin.api_key import router as api_key_router
 from app.api.admin.dashboard import router as dashboard_router
+from app.api.admin.decomposition_template import router as decomposition_template_router
 from app.api.admin.embedding import router as embedding_router
 from app.api.admin.flow_test import router as flow_test_router
 from app.api.admin.guardrails import router as guardrails_router
 from app.api.admin.intent_rules import router as intent_rules_router
 from app.api.admin.kb import router as kb_router
 from app.api.admin.llm import router as llm_router
+from app.api.admin.metadata_field_definition import router as metadata_field_definition_router
+from app.api.admin.metadata_schema import router as metadata_schema_router
 from app.api.admin.monitoring import router as monitoring_router
 from app.api.admin.prompt_templates import router as prompt_templates_router
 from app.api.admin.rag import router as rag_router
@@ -21,12 +24,15 @@ from app.api.admin.tenants import router as tenants_router
 __all__ = [
     "api_key_router",
     "dashboard_router",
+    "decomposition_template_router",
     "embedding_router",
     "flow_test_router",
     "guardrails_router",
     "intent_rules_router",
     "kb_router",
     "llm_router",
+    "metadata_field_definition_router",
+    "metadata_schema_router",
     "monitoring_router",
     "prompt_templates_router",
     "rag_router",
diff --git a/ai-service/app/api/admin/metadata_field_definition.py b/ai-service/app/api/admin/metadata_field_definition.py
new file mode 100644
index 0000000..6bcac26
--- /dev/null
+++ b/ai-service/app/api/admin/metadata_field_definition.py
@@ -0,0 +1,360 @@
+"""
+Metadata Field Definition API.
+[AC-IDSMETA-13, AC-IDSMETA-14] 元数据字段定义管理接口，支持字段级状态治理。
+"""
+
+import logging
+from typing import Annotated, Any
+
+from fastapi import APIRouter, Depends, HTTPException, Query
+from fastapi.responses import JSONResponse
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.database import get_session
+from app.core.exceptions import MissingTenantIdException
+from app.core.tenant import get_tenant_id
+from app.models.entities import (
+    MetadataFieldDefinition,
+    MetadataFieldDefinitionCreate,
+    MetadataFieldDefinitionUpdate,
+    MetadataFieldStatus,
+)
+from app.services.metadata_field_definition_service import MetadataFieldDefinitionService
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter(prefix="/admin/metadata-schemas", tags=["MetadataSchemas"])
+
+
+def get_current_tenant_id() -> str:
+    """Get current tenant ID from context."""
+    tenant_id = get_tenant_id()
+    if not tenant_id:
+        raise MissingTenantIdException()
+    return tenant_id
+
+
+@router.get(
+    "",
+    operation_id="listMetadataSchemas",
+    summary="List metadata schemas",
+    description="[AC-IDSMETA-13] 获取元数据字段定义列表，支持按状态过滤",
+)
+async def list_schemas(
+    tenant_id: Annotated[str, Depends(get_current_tenant_id)],
+    session: Annotated[AsyncSession, Depends(get_session)],
+    status: Annotated[str | None, Query(
+        description="按状态过滤: draft/active/deprecated"
+    )] = None,
+) -> JSONResponse:
+    """
+    [AC-IDSMETA-13] 列出元数据字段定义
+    """
+    logger.info(
+        f"[AC-IDSMETA-13] Listing metadata field definitions: "
+        f"tenant={tenant_id}, status={status}"
+    )
+    
+    if status and status not in [s.value for s in MetadataFieldStatus]:
+        return JSONResponse(
+            status_code=400,
+            content={
+                "code": "INVALID_STATUS",
+                "message": f"Invalid status: {status}",
+                "details": {
+                    "valid_values": [s.value for s in MetadataFieldStatus]
+                }
+            }
+        )
+    
+    service = MetadataFieldDefinitionService(session)
+    fields = await service.list_field_definitions(tenant_id, status)
+    
+    return JSONResponse(
+        content={
+            "items": [
+                {
+                    "id": str(f.id),
+                    "field_key": f.field_key,
+                    "label": f.label,
+                    "type": f.type,
+                    "required": f.required,
+                    "options": f.options,
+                    "default": f.default_value,
+                    "scope": f.scope,
+                    "is_filterable": f.is_filterable,
+                    "is_rank_feature": f.is_rank_feature,
+                    "status": f.status,
+                    "created_at": f.created_at.isoformat() if f.created_at else None,
+                    "updated_at": f.updated_at.isoformat() if f.updated_at else None,
+                }
+                for f in fields
+            ]
+        }
+    )
+
+
+@router.post(
+    "",
+    operation_id="createMetadataSchema",
+    summary="Create metadata schema",
+    description="[AC-IDSMETA-13] 创建新的元数据字段定义",
+    status_code=201,
+)
+async def create_schema(
+    tenant_id: Annotated[str, Depends(get_current_tenant_id)],
+    session: Annotated[AsyncSession, Depends(get_session)],
+    field_create: MetadataFieldDefinitionCreate,
+) -> JSONResponse:
+    """
+    [AC-IDSMETA-13] 创建元数据字段定义
+    """
+    logger.info(
+        f"[AC-IDSMETA-13] Creating metadata field definition: "
+        f"tenant={tenant_id}, field_key={field_create.field_key}"
+    )
+    
+    service = MetadataFieldDefinitionService(session)
+    
+    try:
+        field = await service.create_field_definition(tenant_id, field_create)
+        await session.commit()
+    except ValueError as e:
+        return JSONResponse(
+            status_code=400,
+            content={
+                "code": "VALIDATION_ERROR",
+                "message": str(e),
+            }
+        )
+    
+    return JSONResponse(
+        status_code=201,
+        content={
+            "id": str(field.id),
+            "field_key": field.field_key,
+            "label": field.label,
+            "type": field.type,
+            "required": field.required,
+            "options": field.options,
+            "default": field.default_value,
+            "scope": field.scope,
+            "is_filterable": field.is_filterable,
+            "is_rank_feature": field.is_rank_feature,
+            "status": field.status,
+            "created_at": field.created_at.isoformat() if field.created_at else None,
+            "updated_at": field.updated_at.isoformat() if field.updated_at else None,
+        }
+    )
+
+
+@router.put(
+    "/{id}",
+    operation_id="updateMetadataSchema",
+    summary="Update metadata schema",
+    description="[AC-IDSMETA-14] 更新元数据字段定义，支持状态切换",
+)
+async def update_schema(
+    tenant_id: Annotated[str, Depends(get_current_tenant_id)],
+    session: Annotated[AsyncSession, Depends(get_session)],
+    id: str,
+    field_update: MetadataFieldDefinitionUpdate,
+) -> JSONResponse:
+    """
+    [AC-IDSMETA-14] 更新元数据字段定义
+    """
+    logger.info(
+        f"[AC-IDSMETA-14] Updating metadata field definition: "
+        f"tenant={tenant_id}, id={id}"
+    )
+    
+    if field_update.status and field_update.status not in [s.value for s in MetadataFieldStatus]:
+        return JSONResponse(
+            status_code=400,
+            content={
+                "code": "INVALID_STATUS",
+                "message": f"Invalid status: {field_update.status}",
+                "details": {
+                    "valid_values": [s.value for s in MetadataFieldStatus]
+                }
+            }
+        )
+    
+    service = MetadataFieldDefinitionService(session)
+    
+    try:
+        field = await service.update_field_definition(tenant_id, id, field_update)
+    except ValueError as e:
+        return JSONResponse(
+            status_code=400,
+            content={
+                "code": "VALIDATION_ERROR",
+                "message": str(e),
+            }
+        )
+    
+    if not field:
+        return JSONResponse(
+            status_code=404,
+            content={
+                "code": "NOT_FOUND",
+                "message": f"Field definition {id} not found",
+            }
+        )
+    
+    await session.commit()
+    
+    return JSONResponse(
+        content={
+            "id": str(field.id),
+            "field_key": field.field_key,
+            "label": field.label,
+            "type": field.type,
+            "required": field.required,
+            "options": field.options,
+            "default": field.default_value,
+            "scope": field.scope,
+            "is_filterable": field.is_filterable,
+            "is_rank_feature": field.is_rank_feature,
+            "status": field.status,
+            "created_at": field.created_at.isoformat() if field.created_at else None,
+            "updated_at": field.updated_at.isoformat() if field.updated_at else None,
+        }
+    )
+
+
+@router.get(
+    "/active",
+    operation_id="getActiveMetadataSchemas",
+    summary="Get active metadata schemas",
+    description="[AC-IDSMETA-14] 获取活跃状态的字段定义，用于新建对象时选择",
+)
+async def get_active_schemas(
+    tenant_id: Annotated[str, Depends(get_current_tenant_id)],
+    session: Annotated[AsyncSession, Depends(get_session)],
+    scope: Annotated[str | None, Query(
+        description="按适用范围过滤: kb_document/intent_rule/script_flow/prompt_template"
+    )] = None,
+) -> JSONResponse:
+    """
+    [AC-IDSMETA-14] 获取活跃状态的字段定义
+    """
+    logger.info(
+        f"[AC-IDSMETA-14] Getting active metadata field definitions: "
+        f"tenant={tenant_id}, scope={scope}"
+    )
+    
+    service = MetadataFieldDefinitionService(session)
+    fields = await service.get_active_field_definitions(tenant_id, scope)
+    
+    return JSONResponse(
+        content={
+            "items": [
+                {
+                    "id": str(f.id),
+                    "field_key": f.field_key,
+                    "label": f.label,
+                    "type": f.type,
+                    "required": f.required,
+                    "options": f.options,
+                    "default": f.default_value,
+                    "scope": f.scope,
+                    "is_filterable": f.is_filterable,
+                    "is_rank_feature": f.is_rank_feature,
+                    "status": f.status,
+                    "created_at": f.created_at.isoformat() if f.created_at else None,
+                    "updated_at": f.updated_at.isoformat() if f.updated_at else None,
+                }
+                for f in fields
+            ]
+        }
+    )
+
+
+@router.get(
+    "/readable",
+    operation_id="getReadableMetadataSchemas",
+    summary="Get readable metadata schemas",
+    description="[AC-IDSMETA-14] 获取可读取的字段定义（active + deprecated），用于历史数据展示",
+)
+async def get_readable_schemas(
+    tenant_id: Annotated[str, Depends(get_current_tenant_id)],
+    session: Annotated[AsyncSession, Depends(get_session)],
+    scope: Annotated[str | None, Query(
+        description="按适用范围过滤: kb_document/intent_rule/script_flow/prompt_template"
+    )] = None,
+) -> JSONResponse:
+    """
+    [AC-IDSMETA-14] 获取可读取的字段定义（active + deprecated）
+    """
+    logger.info(
+        f"[AC-IDSMETA-14] Getting readable metadata field definitions: "
+        f"tenant={tenant_id}, scope={scope}"
+    )
+    
+    service = MetadataFieldDefinitionService(session)
+    fields = await service.get_field_definitions_for_read(tenant_id, scope)
+    
+    return JSONResponse(
+        content={
+            "items": [
+                {
+                    "id": str(f.id),
+                    "field_key": f.field_key,
+                    "label": f.label,
+                    "type": f.type,
+                    "required": f.required,
+                    "options": f.options,
+                    "default": f.default_value,
+                    "scope": f.scope,
+                    "is_filterable": f.is_filterable,
+                    "is_rank_feature": f.is_rank_feature,
+                    "status": f.status,
+                    "created_at": f.created_at.isoformat() if f.created_at else None,
+                    "updated_at": f.updated_at.isoformat() if f.updated_at else None,
+                }
+                for f in fields
+            ]
+        }
+    )
+
+
+@router.post(
+    "/validate",
+    operation_id="validateMetadataForCreate",
+    summary="Validate metadata for create",
+    description="[AC-IDSMETA-14, AC-IDSMETA-15] 验证元数据是否可用于新建对象",
+)
+async def validate_metadata_for_create(
+    tenant_id: Annotated[str, Depends(get_current_tenant_id)],
+    session: Annotated[AsyncSession, Depends(get_session)],
+    body: dict[str, Any],
+) -> JSONResponse:
+    """
+    [AC-IDSMETA-14, AC-IDSMETA-15] 验证元数据是否可用于新建对象
+    
+    Request body:
+    {
+        "metadata": {"grade": "初一", "subject": "语文"},
+        "scope": "kb_document"
+    }
+    """
+    metadata = body.get("metadata", {})
+    scope = body.get("scope", "kb_document")
+    
+    logger.info(
+        f"[AC-IDSMETA-14] Validating metadata for create: "
+        f"tenant={tenant_id}, scope={scope}"
+    )
+    
+    service = MetadataFieldDefinitionService(session)
+    is_valid, errors = await service.validate_metadata_for_create(
+        tenant_id, metadata, scope
+    )
+    
+    return JSONResponse(
+        content={
+            "isValid": is_valid,
+            "errors": errors,
+        }
+    )
diff --git a/ai-service/app/main.py b/ai-service/app/main.py
index ead5c1a..c0bc5c2 100644
--- a/ai-service/app/main.py
+++ b/ai-service/app/main.py
@@ -15,12 +15,15 @@ from app.api import chat_router, health_router
 from app.api.admin import (
     api_key_router,
     dashboard_router,
+    decomposition_template_router,
     embedding_router,
     flow_test_router,
     guardrails_router,
     intent_rules_router,
     kb_router,
     llm_router,
+    metadata_field_definition_router,
+    metadata_schema_router,
     monitoring_router,
     prompt_templates_router,
     rag_router,
@@ -147,6 +150,7 @@ app.include_router(chat_router)
 
 app.include_router(api_key_router)
 app.include_router(dashboard_router)
+app.include_router(decomposition_template_router)
 app.include_router(embedding_router)
 app.include_router(flow_test_router)
 app.include_router(guardrails_router)
@@ -154,6 +158,8 @@ app.include_router(intent_rules_router)
 app.include_router(kb_router)
 app.include_router(kb_optimized_router)
 app.include_router(llm_router)
+app.include_router(metadata_field_definition_router)
+app.include_router(metadata_schema_router)
 app.include_router(monitoring_router)
 app.include_router(prompt_templates_router)
 app.include_router(rag_router)
diff --git a/ai-service/app/models/entities.py b/ai-service/app/models/entities.py
index 775b5e1..e21c90c 100644
--- a/ai-service/app/models/entities.py
+++ b/ai-service/app/models/entities.py
@@ -289,6 +289,7 @@ class PromptTemplate(SQLModel, table=True):
     """
     [AC-AISVC-51, AC-AISVC-52] Prompt template entity with tenant isolation.
     Main table for storing template metadata.
+    [AC-IDSMETA-16] Extended with metadata field for unified storage structure.
     """
 
     __tablename__ = "prompt_templates"
@@ -302,6 +303,11 @@ class PromptTemplate(SQLModel, table=True):
     scene: str = Field(..., description="Scene tag: chat/rag_qa/greeting/farewell")
     description: str | None = Field(default=None, description="Template description")
     is_default: bool = Field(default=False, description="Whether this is the default template for the scene")
+    metadata_: dict[str, Any] | None = Field(
+        default=None,
+        sa_column=Column("metadata", JSON, nullable=True),
+        description="[AC-IDSMETA-16] Structured metadata for the prompt template"
+    )
     created_at: datetime = Field(default_factory=datetime.utcnow, description="Creation time")
     updated_at: datetime = Field(default_factory=datetime.utcnow, description="Last update time")
 
@@ -350,6 +356,7 @@ class PromptTemplateCreate(SQLModel):
     system_instruction: str
     variables: list[dict[str, Any]] | None = None
     is_default: bool = False
+    metadata_: dict[str, Any] | None = None
 
 
 class PromptTemplateUpdate(SQLModel):
@@ -361,6 +368,7 @@ class PromptTemplateUpdate(SQLModel):
     system_instruction: str | None = None
     variables: list[dict[str, Any]] | None = None
     is_default: bool | None = None
+    metadata_: dict[str, Any] | None = None
 
 
 class ResponseType(str, Enum):
@@ -375,6 +383,7 @@ class IntentRule(SQLModel, table=True):
     """
     [AC-AISVC-65] Intent rule entity with tenant isolation.
     Supports keyword and regex matching for intent recognition.
+    [AC-IDSMETA-16] Extended with metadata field for unified storage structure.
     """
 
     __tablename__ = "intent_rules"
@@ -407,6 +416,11 @@ class IntentRule(SQLModel, table=True):
     transfer_message: str | None = Field(default=None, description="Transfer message for transfer type")
     is_enabled: bool = Field(default=True, description="Whether the rule is enabled")
     hit_count: int = Field(default=0, description="Hit count for statistics")
+    metadata_: dict[str, Any] | None = Field(
+        default=None,
+        sa_column=Column("metadata", JSON, nullable=True),
+        description="[AC-IDSMETA-16] Structured metadata for the intent rule"
+    )
     created_at: datetime = Field(default_factory=datetime.utcnow, description="Creation time")
     updated_at: datetime = Field(default_factory=datetime.utcnow, description="Last update time")
 
@@ -423,6 +437,7 @@ class IntentRuleCreate(SQLModel):
     flow_id: str | None = None
     fixed_reply: str | None = None
     transfer_message: str | None = None
+    metadata_: dict[str, Any] | None = None
 
 
 class IntentRuleUpdate(SQLModel):
@@ -438,6 +453,7 @@ class IntentRuleUpdate(SQLModel):
     fixed_reply: str | None = None
     transfer_message: str | None = None
     is_enabled: bool | None = None
+    metadata_: dict[str, Any] | None = None
 
 
 class IntentMatchResult:
@@ -643,6 +659,7 @@ class ScriptFlow(SQLModel, table=True):
     """
     [AC-AISVC-71] Script flow entity with tenant isolation.
     Stores flow definition with steps in JSONB format.
+    [AC-IDSMETA-16] Extended with metadata field for unified storage structure.
     """
 
     __tablename__ = "script_flows"
@@ -660,6 +677,11 @@ class ScriptFlow(SQLModel, table=True):
         description="Flow steps list with step_no, content, wait_input, timeout_seconds"
     )
     is_enabled: bool = Field(default=True, description="Whether the flow is enabled")
+    metadata_: dict[str, Any] | None = Field(
+        default=None,
+        sa_column=Column("metadata", JSON, nullable=True),
+        description="[AC-IDSMETA-16] Structured metadata for the script flow"
+    )
     created_at: datetime = Field(default_factory=datetime.utcnow, description="Creation time")
     updated_at: datetime = Field(default_factory=datetime.utcnow, description="Last update time")
 
@@ -700,8 +722,18 @@ class FlowInstance(SQLModel, table=True):
     completed_at: datetime | None = Field(default=None, description="Completion time (nullable)")
 
 
+class ScriptMode(str, Enum):
+    """[AC-IDS-01] Script generation mode for flow steps."""
+    FIXED = "fixed"
+    FLEXIBLE = "flexible"
+    TEMPLATE = "template"
+
+
 class FlowStep(SQLModel):
-    """[AC-AISVC-71] Schema for a single flow step."""
+    """
+    [AC-AISVC-71] Schema for a single flow step.
+    [AC-IDS-01] Extended with intent-driven script generation fields.
+    """
 
     step_no: int = Field(..., ge=1, description="Step number (1-indexed)")
     content: str = Field(..., description="Script content for this step")
@@ -717,6 +749,31 @@ class FlowStep(SQLModel):
     )
     default_next: int | None = Field(default=None, description="Default next step if no condition matches")
 
+    script_mode: str = Field(
+        default=ScriptMode.FIXED.value,
+        description="[AC-IDS-01] Script mode: fixed/flexible/template"
+    )
+    intent: str | None = Field(
+        default=None,
+        description="[AC-IDS-01] Step intent for flexible mode (e.g., '获取用户姓名')"
+    )
+    intent_description: str | None = Field(
+        default=None,
+        description="[AC-IDS-01] Detailed intent description for better AI understanding"
+    )
+    script_constraints: list[str] | None = Field(
+        default=None,
+        description="[AC-IDS-01] Script constraints for flexible mode (e.g., ['必须礼貌', '语气自然'])"
+    )
+    expected_variables: list[str] | None = Field(
+        default=None,
+        description="[AC-IDS-01] Expected variables to extract from user input"
+    )
+    rag_config: dict[str, Any] | None = Field(
+        default=None,
+        description="RAG configuration for this step: {'enabled': true, 'tag_filter': {'grade': '${context.grade}', 'type': '痛点'}}"
+    )
+
 
 class ScriptFlowCreate(SQLModel):
     """[AC-AISVC-71] Schema for creating a new script flow."""
@@ -725,6 +782,7 @@ class ScriptFlowCreate(SQLModel):
     description: str | None = None
     steps: list[dict[str, Any]]
     is_enabled: bool = True
+    metadata_: dict[str, Any] | None = None
 
 
 class ScriptFlowUpdate(SQLModel):
@@ -734,6 +792,7 @@ class ScriptFlowUpdate(SQLModel):
     description: str | None = None
     steps: list[dict[str, Any]] | None = None
     is_enabled: bool | None = None
+    metadata_: dict[str, Any] | None = None
 
 
 class FlowAdvanceResult:
@@ -886,3 +945,271 @@ class ConversationDetail(SQLModel):
     should_transfer: bool = False
     execution_steps: list[dict[str, Any]] | None = None
     created_at: datetime
+
+
+class MetadataFieldType(str, Enum):
+    """元数据字段类型"""
+    STRING = "string"
+    NUMBER = "number"
+    BOOLEAN = "boolean"
+    ENUM = "enum"
+    ARRAY_ENUM = "array_enum"
+
+
+class MetadataFieldStatus(str, Enum):
+    """[AC-IDSMETA-13] 元数据字段状态"""
+    DRAFT = "draft"
+    ACTIVE = "active"
+    DEPRECATED = "deprecated"
+
+
+class MetadataScope(str, Enum):
+    """[AC-IDSMETA-15] 元数据字段适用范围"""
+    KB_DOCUMENT = "kb_document"
+    INTENT_RULE = "intent_rule"
+    SCRIPT_FLOW = "script_flow"
+    PROMPT_TEMPLATE = "prompt_template"
+
+
+class MetadataField(SQLModel):
+    """元数据字段定义（非持久化，用于嵌套结构）"""
+    name: str = Field(..., description="字段名称，如 grade, subject, industry")
+    label: str = Field(..., description="字段显示名称，如 年级, 学科, 行业")
+    field_type: str = Field(
+        default=MetadataFieldType.STRING.value,
+        description="字段类型: string/number/boolean/enum/array_enum"
+    )
+    options: list[str] | None = Field(
+        default=None,
+        description="选项列表，用于 enum/array_enum 类型，如 ['初一', '初二', '初三']"
+    )
+    required: bool = Field(default=False, description="是否必填")
+    default_value: str | None = Field(default=None, description="默认值")
+    description: str | None = Field(default=None, description="字段描述")
+    sort_order: int = Field(default=0, description="排序顺序")
+
+
+class MetadataFieldDefinition(SQLModel, table=True):
+    """
+    [AC-IDSMETA-13] 元数据字段定义表
+    每个字段独立存储，支持字段级状态管理（draft/active/deprecated）
+    """
+
+    __tablename__ = "metadata_field_definitions"
+    __table_args__ = (
+        Index("ix_metadata_field_definitions_tenant", "tenant_id"),
+        Index("ix_metadata_field_definitions_tenant_status", "tenant_id", "status"),
+        Index("ix_metadata_field_definitions_tenant_field_key", "tenant_id", "field_key", unique=True),
+    )
+
+    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)
+    tenant_id: str = Field(..., description="Tenant ID for multi-tenant isolation", index=True)
+    field_key: str = Field(
+        ...,
+        description="字段键名，仅允许小写字母数字下划线，如 grade, subject, industry",
+        min_length=1,
+        max_length=64,
+    )
+    label: str = Field(..., description="字段显示名称", min_length=1, max_length=64)
+    type: str = Field(
+        default=MetadataFieldType.STRING.value,
+        description="字段类型: string/number/boolean/enum/array_enum"
+    )
+    required: bool = Field(default=False, description="是否必填")
+    options: list[str] | None = Field(
+        default=None,
+        sa_column=Column("options", JSON, nullable=True),
+        description="选项列表，用于 enum/array_enum 类型"
+    )
+    default_value: str | None = Field(default=None, description="默认值", sa_column=Column("default_value", JSON, nullable=True))
+    scope: list[str] = Field(
+        default_factory=lambda: [MetadataScope.KB_DOCUMENT.value],
+        sa_column=Column("scope", JSON, nullable=False),
+        description="适用范围: kb_document/intent_rule/script_flow/prompt_template"
+    )
+    is_filterable: bool = Field(default=True, description="是否可用于过滤")
+    is_rank_feature: bool = Field(default=False, description="是否用于排序特征")
+    status: str = Field(
+        default=MetadataFieldStatus.DRAFT.value,
+        description="字段状态: draft/active/deprecated"
+    )
+    version: int = Field(default=1, description="版本号")
+    created_at: datetime = Field(default_factory=datetime.utcnow, description="创建时间")
+    updated_at: datetime = Field(default_factory=datetime.utcnow, description="更新时间")
+
+
+class MetadataFieldDefinitionCreate(SQLModel):
+    """[AC-IDSMETA-13] 创建元数据字段定义"""
+
+    field_key: str = Field(..., min_length=1, max_length=64)
+    label: str = Field(..., min_length=1, max_length=64)
+    type: str = Field(default=MetadataFieldType.STRING.value)
+    required: bool = Field(default=False)
+    options: list[str] | None = None
+    default_value: str | int | float | bool | None = None
+    scope: list[str] = Field(default_factory=lambda: [MetadataScope.KB_DOCUMENT.value])
+    is_filterable: bool = Field(default=True)
+    is_rank_feature: bool = Field(default=False)
+    status: str = Field(default=MetadataFieldStatus.DRAFT.value)
+
+
+class MetadataFieldDefinitionUpdate(SQLModel):
+    """[AC-IDSMETA-14] 更新元数据字段定义"""
+
+    label: str | None = Field(default=None, min_length=1, max_length=64)
+    required: bool | None = None
+    options: list[str] | None = None
+    default_value: str | int | float | bool | None = None
+    scope: list[str] | None = None
+    is_filterable: bool | None = None
+    is_rank_feature: bool | None = None
+    status: str | None = None
+
+
+class MetadataSchema(SQLModel, table=True):
+    """
+    元数据模式定义（保留兼容性）
+    每个租户可以定义自己的元数据字段配置
+    """
+
+    __tablename__ = "metadata_schemas"
+    __table_args__ = (
+        Index("ix_metadata_schemas_tenant", "tenant_id"),
+    )
+
+    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)
+    tenant_id: str = Field(..., description="Tenant ID for multi-tenant isolation", index=True)
+    name: str = Field(..., description="模式名称，如 教育行业元数据")
+    description: str | None = Field(default=None, description="模式描述")
+    fields: list[dict[str, Any]] = Field(
+        default=[],
+        sa_column=Column("fields", JSON, nullable=False),
+        description="字段定义列表"
+    )
+    is_default: bool = Field(default=False, description="是否为租户默认模式")
+    is_enabled: bool = Field(default=True, description="是否启用")
+    created_at: datetime = Field(default_factory=datetime.utcnow, description="创建时间")
+    updated_at: datetime = Field(default_factory=datetime.utcnow, description="更新时间")
+
+
+class MetadataSchemaCreate(SQLModel):
+    """创建元数据模式"""
+
+    name: str
+    description: str | None = None
+    fields: list[dict[str, Any]]
+    is_default: bool = False
+
+
+class MetadataSchemaUpdate(SQLModel):
+    """更新元数据模式"""
+
+    name: str | None = None
+    description: str | None = None
+    fields: list[dict[str, Any]] | None = None
+    is_default: bool | None = None
+    is_enabled: bool | None = None
+
+
+class MetadataFieldCreate(SQLModel):
+    """创建元数据字段"""
+
+    name: str
+    label: str
+    field_type: str = "string"
+    options: list[str] | None = None
+    required: bool = False
+    default_value: str | None = None
+    description: str | None = None
+    sort_order: int = 0
+
+
+class DecompositionTemplateStatus(str, Enum):
+    """[AC-IDSMETA-22] 拆解模板状态"""
+    DRAFT = "draft"
+    PUBLISHED = "published"
+    ARCHIVED = "archived"
+
+
+class DecompositionTemplate(SQLModel, table=True):
+    """
+    [AC-IDSMETA-22] 拆解模板表
+    用于将待录入文本按固定模板拆解为结构化数据
+    """
+
+    __tablename__ = "decomposition_templates"
+    __table_args__ = (
+        Index("ix_decomposition_templates_tenant", "tenant_id"),
+        Index("ix_decomposition_templates_tenant_status", "tenant_id", "status"),
+    )
+
+    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)
+    tenant_id: str = Field(..., description="Tenant ID for multi-tenant isolation", index=True)
+    name: str = Field(..., description="模板名称")
+    description: str | None = Field(default=None, description="模板描述")
+    version: int = Field(default=1, description="版本号")
+    status: str = Field(
+        default=DecompositionTemplateStatus.DRAFT.value,
+        description="模板状态: draft/published/archived"
+    )
+    template_schema: dict[str, Any] = Field(
+        default_factory=dict,
+        sa_column=Column("template_schema", JSON, nullable=False),
+        description="输出模板结构定义，包含字段名、类型、描述等"
+    )
+    extraction_hints: dict[str, Any] | None = Field(
+        default=None,
+        sa_column=Column("extraction_hints", JSON, nullable=True),
+        description="提取提示，用于指导 LLM 提取特定字段"
+    )
+    example_input: str | None = Field(default=None, description="示例输入文本")
+    example_output: dict[str, Any] | None = Field(
+        default=None,
+        sa_column=Column("example_output", JSON, nullable=True),
+        description="示例输出 JSON"
+    )
+    created_at: datetime = Field(default_factory=datetime.utcnow, description="创建时间")
+    updated_at: datetime = Field(default_factory=datetime.utcnow, description="更新时间")
+
+
+class DecompositionTemplateCreate(SQLModel):
+    """[AC-IDSMETA-22] 创建拆解模板"""
+
+    name: str
+    description: str | None = None
+    template_schema: dict[str, Any]
+    extraction_hints: dict[str, Any] | None = None
+    example_input: str | None = None
+    example_output: dict[str, Any] | None = None
+
+
+class DecompositionTemplateUpdate(SQLModel):
+    """[AC-IDSMETA-22] 更新拆解模板"""
+
+    name: str | None = None
+    description: str | None = None
+    template_schema: dict[str, Any] | None = None
+    extraction_hints: dict[str, Any] | None = None
+    example_input: str | None = None
+    example_output: dict[str, Any] | None = None
+    status: str | None = None
+
+
+class DecompositionRequest(SQLModel):
+    """[AC-IDSMETA-21] 拆解请求"""
+
+    text: str = Field(..., description="待拆解的文本")
+    template_id: str | None = Field(default=None, description="指定模板 ID（可选）")
+    hints: dict[str, Any] | None = Field(default=None, description="额外提取提示")
+
+
+class DecompositionResult(SQLModel):
+    """[AC-IDSMETA-21] 拆解结果"""
+
+    success: bool = Field(..., description="是否成功")
+    data: dict[str, Any] | None = Field(default=None, description="拆解后的结构化数据")
+    template_id: str | None = Field(default=None, description="使用的模板 ID")
+    template_version: int | None = Field(default=None, description="使用的模板版本")
+    confidence: float | None = Field(default=None, description="拆解置信度")
+    error: str | None = Field(default=None, description="错误信息")
+    latency_ms: int | None = Field(default=None, description="处理耗时（毫秒）")
diff --git a/ai-service/app/services/metadata_field_definition_service.py b/ai-service/app/services/metadata_field_definition_service.py
new file mode 100644
index 0000000..e58e5ee
--- /dev/null
+++ b/ai-service/app/services/metadata_field_definition_service.py
@@ -0,0 +1,472 @@
+"""
+Metadata Field Definition Service.
+[AC-IDSMETA-13, AC-IDSMETA-14] 元数据字段定义管理服务，支持字段级状态治理。
+"""
+
+import logging
+import re
+import uuid
+from datetime import datetime
+from typing import Any
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlmodel import col
+
+from app.models.entities import (
+    MetadataFieldDefinition,
+    MetadataFieldDefinitionCreate,
+    MetadataFieldDefinitionUpdate,
+    MetadataFieldStatus,
+    MetadataFieldType,
+    MetadataScope,
+)
+
+logger = logging.getLogger(__name__)
+
+
+class MetadataFieldDefinitionService:
+    """
+    [AC-IDSMETA-13] 元数据字段定义服务
+    管理租户的动态元数据字段配置，支持字段级状态治理
+    """
+
+    FIELD_KEY_PATTERN = re.compile(r"^[a-z0-9_]+$")
+
+    def __init__(self, session: AsyncSession):
+        self._session = session
+
+    async def list_field_definitions(
+        self,
+        tenant_id: str,
+        status: str | None = None,
+        scope: str | None = None,
+    ) -> list[MetadataFieldDefinition]:
+        """
+        [AC-IDSMETA-13] 列出租户所有元数据字段定义
+        
+        Args:
+            tenant_id: 租户 ID
+            status: 按状态过滤（draft/active/deprecated）
+            scope: 按适用范围过滤
+        
+        Returns:
+            MetadataFieldDefinition 列表
+        """
+        stmt = select(MetadataFieldDefinition).where(
+            MetadataFieldDefinition.tenant_id == tenant_id,
+        )
+        
+        if status:
+            stmt = stmt.where(MetadataFieldDefinition.status == status)
+        
+        if scope:
+            stmt = stmt.where(MetadataFieldDefinition.scope.contains([scope]))
+        
+        stmt = stmt.order_by(col(MetadataFieldDefinition.created_at).desc())
+        
+        result = await self._session.execute(stmt)
+        return list(result.scalars().all())
+
+    async def get_field_definition(
+        self,
+        tenant_id: str,
+        field_id: str,
+    ) -> MetadataFieldDefinition | None:
+        """
+        获取单个字段定义
+        
+        Args:
+            tenant_id: 租户 ID
+            field_id: 字段定义 ID
+        
+        Returns:
+            MetadataFieldDefinition 或 None
+        """
+        stmt = select(MetadataFieldDefinition).where(
+            MetadataFieldDefinition.tenant_id == tenant_id,
+            MetadataFieldDefinition.id == uuid.UUID(field_id),
+        )
+        result = await self._session.execute(stmt)
+        return result.scalar_one_or_none()
+
+    async def get_field_definition_by_key(
+        self,
+        tenant_id: str,
+        field_key: str,
+    ) -> MetadataFieldDefinition | None:
+        """
+        通过 field_key 获取字段定义
+        
+        Args:
+            tenant_id: 租户 ID
+            field_key: 字段键名
+        
+        Returns:
+            MetadataFieldDefinition 或 None
+        """
+        stmt = select(MetadataFieldDefinition).where(
+            MetadataFieldDefinition.tenant_id == tenant_id,
+            MetadataFieldDefinition.field_key == field_key,
+        )
+        result = await self._session.execute(stmt)
+        return result.scalar_one_or_none()
+
+    async def create_field_definition(
+        self,
+        tenant_id: str,
+        field_create: MetadataFieldDefinitionCreate,
+    ) -> MetadataFieldDefinition:
+        """
+        [AC-IDSMETA-13] 创建元数据字段定义
+        
+        Args:
+            tenant_id: 租户 ID
+            field_create: 创建数据
+        
+        Returns:
+            创建的 MetadataFieldDefinition
+        
+        Raises:
+            ValueError: 如果 field_key 已存在或格式不正确
+        """
+        if not self.FIELD_KEY_PATTERN.match(field_create.field_key):
+            raise ValueError(
+                f"field_key '{field_create.field_key}' 格式不正确，"
+                "仅允许小写字母、数字和下划线"
+            )
+        
+        existing = await self.get_field_definition_by_key(tenant_id, field_create.field_key)
+        if existing:
+            raise ValueError(f"field_key '{field_create.field_key}' 已存在")
+        
+        self._validate_field_type_and_options(
+            field_create.type,
+            field_create.options,
+            field_create.field_key,
+        )
+        
+        field = MetadataFieldDefinition(
+            tenant_id=tenant_id,
+            field_key=field_create.field_key,
+            label=field_create.label,
+            type=field_create.type,
+            required=field_create.required,
+            options=field_create.options,
+            default_value=field_create.default_value,
+            scope=field_create.scope,
+            is_filterable=field_create.is_filterable,
+            is_rank_feature=field_create.is_rank_feature,
+            status=field_create.status,
+            version=1,
+        )
+        
+        self._session.add(field)
+        await self._session.flush()
+        
+        logger.info(
+            f"[AC-IDSMETA-13] Created field definition: tenant={tenant_id}, "
+            f"field_key={field.field_key}, status={field.status}"
+        )
+        
+        return field
+
+    async def update_field_definition(
+        self,
+        tenant_id: str,
+        field_id: str,
+        field_update: MetadataFieldDefinitionUpdate,
+    ) -> MetadataFieldDefinition | None:
+        """
+        [AC-IDSMETA-14] 更新元数据字段定义
+        
+        Args:
+            tenant_id: 租户 ID
+            field_id: 字段定义 ID
+            field_update: 更新数据
+        
+        Returns:
+            更新后的 MetadataFieldDefinition 或 None
+        """
+        field = await self.get_field_definition(tenant_id, field_id)
+        if not field:
+            return None
+        
+        if field_update.label is not None:
+            field.label = field_update.label
+        if field_update.required is not None:
+            field.required = field_update.required
+        if field_update.options is not None:
+            self._validate_field_type_and_options(field.type, field_update.options, field.field_key)
+            field.options = field_update.options
+        if field_update.default_value is not None:
+            field.default_value = field_update.default_value
+        if field_update.scope is not None:
+            field.scope = field_update.scope
+        if field_update.is_filterable is not None:
+            field.is_filterable = field_update.is_filterable
+        if field_update.is_rank_feature is not None:
+            field.is_rank_feature = field_update.is_rank_feature
+        if field_update.status is not None:
+            old_status = field.status
+            field.status = field_update.status
+            logger.info(
+                f"[AC-IDSMETA-14] Field status changed: tenant={tenant_id}, "
+                f"field_key={field.field_key}, {old_status} -> {field.status}"
+            )
+        
+        field.version += 1
+        field.updated_at = datetime.utcnow()
+        await self._session.flush()
+        
+        logger.info(
+            f"[AC-IDSMETA-14] Updated field definition: tenant={tenant_id}, "
+            f"field_id={field_id}, version={field.version}"
+        )
+        
+        return field
+
+    async def get_active_field_definitions(
+        self,
+        tenant_id: str,
+        scope: str | None = None,
+    ) -> list[MetadataFieldDefinition]:
+        """
+        [AC-IDSMETA-14] 获取活跃状态的字段定义（用于新建对象时选择）
+        
+        Args:
+            tenant_id: 租户 ID
+            scope: 按适用范围过滤
+        
+        Returns:
+            状态为 active 的 MetadataFieldDefinition 列表
+        """
+        return await self.list_field_definitions(
+            tenant_id,
+            status=MetadataFieldStatus.ACTIVE.value,
+            scope=scope,
+        )
+
+    async def get_field_definitions_for_read(
+        self,
+        tenant_id: str,
+        scope: str | None = None,
+    ) -> list[MetadataFieldDefinition]:
+        """
+        [AC-IDSMETA-14] 获取可用于读取的字段定义（active + deprecated，不含 draft）
+        用于历史数据读取和展示
+        
+        Args:
+            tenant_id: 租户 ID
+            scope: 按适用范围过滤
+        
+        Returns:
+            状态为 active 或 deprecated 的 MetadataFieldDefinition 列表
+        """
+        stmt = select(MetadataFieldDefinition).where(
+            MetadataFieldDefinition.tenant_id == tenant_id,
+            MetadataFieldDefinition.status.in_([
+                MetadataFieldStatus.ACTIVE.value,
+                MetadataFieldStatus.DEPRECATED.value,
+            ]),
+        )
+        
+        if scope:
+            stmt = stmt.where(MetadataFieldDefinition.scope.contains([scope]))
+        
+        stmt = stmt.order_by(col(MetadataFieldDefinition.created_at).desc())
+        
+        result = await self._session.execute(stmt)
+        return list(result.scalars().all())
+
+    async def validate_metadata_for_create(
+        self,
+        tenant_id: str,
+        metadata: dict[str, Any],
+        scope: str,
+    ) -> tuple[bool, list[str]]:
+        """
+        [AC-IDSMETA-14, AC-IDSMETA-15] 验证元数据是否可用于新建对象
+        
+        检查:
+        1. 所有 required 字段是否已填写
+        2. 字段是否为 active 状态（deprecated 字段禁止用于新建）
+        3. 值类型是否正确
+        4. enum/array_enum 类型的值是否在 options 中
+        
+        Args:
+            tenant_id: 租户 ID
+            metadata: 元数据字典
+            scope: 对象类型范围
+        
+        Returns:
+            (是否有效, 错误消息列表)
+        """
+        active_fields = await self.get_active_field_definitions(tenant_id, scope)
+        active_field_map = {f.field_key: f for f in active_fields}
+        
+        errors = []
+        
+        for field_key, field_def in active_field_map.items():
+            if field_def.required and field_key not in metadata:
+                errors.append(f"必填字段 '{field_def.label}' ({field_key}) 未填写")
+                continue
+        
+        for field_key, value in metadata.items():
+            if field_key not in active_field_map:
+                deprecated_field = await self.get_field_definition_by_key(tenant_id, field_key)
+                if deprecated_field and deprecated_field.status == MetadataFieldStatus.DEPRECATED.value:
+                    errors.append(
+                        f"字段 '{deprecated_field.label}' ({field_key}) 已废弃，"
+                        "不能用于新建对象"
+                    )
+                continue
+            
+            field_def = active_field_map[field_key]
+            type_errors = self._validate_field_value(field_def, value)
+            errors.extend(type_errors)
+        
+        return len(errors) == 0, errors
+
+    async def validate_metadata_for_update(
+        self,
+        tenant_id: str,
+        metadata: dict[str, Any],
+        scope: str,
+    ) -> tuple[bool, list[str]]:
+        """
+        [AC-IDSMETA-14] 验证元数据是否可用于更新对象
+        
+        与新建不同，更新时允许保留 deprecated 字段的值（但不能新增）
+        
+        Args:
+            tenant_id: 租户 ID
+            metadata: 元数据字典
+            scope: 对象类型范围
+        
+        Returns:
+            (是否有效, 错误消息列表)
+        """
+        readable_fields = await self.get_field_definitions_for_read(tenant_id, scope)
+        readable_field_map = {f.field_key: f for f in readable_fields}
+        
+        active_fields = await self.get_active_field_definitions(tenant_id, scope)
+        active_field_map = {f.field_key: f for f in active_fields}
+        
+        errors = []
+        
+        for field_key, field_def in active_field_map.items():
+            if field_def.required and field_key not in metadata:
+                errors.append(f"必填字段 '{field_def.label}' ({field_key}) 未填写")
+        
+        for field_key, value in metadata.items():
+            if field_key not in readable_field_map:
+                errors.append(f"未知字段 '{field_key}'")
+                continue
+            
+            field_def = readable_field_map[field_key]
+            type_errors = self._validate_field_value(field_def, value)
+            errors.extend(type_errors)
+        
+        return len(errors) == 0, errors
+
+    def _validate_field_value(
+        self,
+        field_def: MetadataFieldDefinition,
+        value: Any,
+    ) -> list[str]:
+        """验证字段值类型和选项"""
+        errors = []
+        field_key = field_def.field_key
+        field_type = field_def.type
+        
+        if value is None:
+            return errors
+        
+        if field_type == MetadataFieldType.NUMBER.value:
+            if not isinstance(value, (int, float)):
+                try:
+                    float(value)
+                except (ValueError, TypeError):
+                    errors.append(f"字段 '{field_def.label}' ({field_key}) 应为数字类型")
+        
+        elif field_type == MetadataFieldType.BOOLEAN.value:
+            if not isinstance(value, bool):
+                if value not in ["true", "false", "1", "0", 1, 0]:
+                    errors.append(f"字段 '{field_def.label}' ({field_key}) 应为布尔类型")
+        
+        elif field_type == MetadataFieldType.ENUM.value:
+            if field_def.options and value not in field_def.options:
+                errors.append(
+                    f"字段 '{field_def.label}' ({field_key}) 的值 '{value}' "
+                    f"不在允许选项中: {field_def.options}"
+                )
+        
+        elif field_type == MetadataFieldType.ARRAY_ENUM.value:
+            if not isinstance(value, list):
+                errors.append(f"字段 '{field_def.label}' ({field_key}) 应为数组类型")
+            elif field_def.options:
+                for v in value:
+                    if v not in field_def.options:
+                        errors.append(
+                            f"字段 '{field_def.label}' ({field_key}) 的值 '{v}' "
+                            f"不在允许选项中: {field_def.options}"
+                        )
+        
+        return errors
+
+    def _validate_field_type_and_options(
+        self,
+        field_type: str,
+        options: list[str] | None,
+        field_key: str,
+    ) -> None:
+        """验证字段类型和选项的一致性"""
+        if field_type in [MetadataFieldType.ENUM.value, MetadataFieldType.ARRAY_ENUM.value]:
+            if not options or len(options) == 0:
+                raise ValueError(
+                    f"字段 '{field_key}' 类型为 {field_type}，必须提供 options"
+                )
+            if len(options) != len(set(options)):
+                raise ValueError(
+                    f"字段 '{field_key}' 的 options 存在重复值"
+                )
+
+    async def get_field_definitions_map(
+        self,
+        tenant_id: str,
+        scope: str | None = None,
+        include_deprecated: bool = False,
+    ) -> dict[str, dict[str, Any]]:
+        """
+        获取字段定义映射，用于前端动态渲染表单
+        
+        Args:
+            tenant_id: 租户 ID
+            scope: 按适用范围过滤
+            include_deprecated: 是否包含 deprecated 字段
+        
+        Returns:
+            字段键名到字段定义的映射
+        """
+        if include_deprecated:
+            fields = await self.get_field_definitions_for_read(tenant_id, scope)
+        else:
+            fields = await self.get_active_field_definitions(tenant_id, scope)
+        
+        return {
+            f.field_key: {
+                "id": str(f.id),
+                "field_key": f.field_key,
+                "label": f.label,
+                "type": f.type,
+                "required": f.required,
+                "options": f.options,
+                "default": f.default_value,
+                "scope": f.scope,
+                "is_filterable": f.is_filterable,
+                "is_rank_feature": f.is_rank_feature,
+                "status": f.status,
+            }
+            for f in fields
+        }