diff --git a/apps/backend/src/services/fulfillment/channel-assign-service.test.ts b/apps/backend/src/services/fulfillment/channel-assign-service.test.ts
new file mode 100644
index 00000000..9d135354
--- /dev/null
+++ b/apps/backend/src/services/fulfillment/channel-assign-service.test.ts
@@ -0,0 +1,118 @@
+import assert from 'node:assert/strict'
+import test from 'node:test'
+
+import {
+  resolveChannelDecision,
+  type ChannelCandidateItem,
+  type ChannelRule,
+} from './channel-assign-service.js'
+
+function buildItem(patch: Partial<ChannelCandidateItem> = {}): ChannelCandidateItem {
+  return {
+    id: 1,
+    provider: '91kaquan',
+    shop_id: 'shop-a',
+    sku_code: 'suit_xxx',
+    sku_name: '套装-测试',
+    manual_sku_key: 'suit_xxx',
+    normalized_sku_name: '套装-测试',
+    has_work_order: false,
+    has_affiliate_task: false,
+    ...patch,
+  }
+}
+
+function buildRule(patch: Partial<ChannelRule> = {}): ChannelRule {
+  return {
+    id: 1,
+    provider: '',
+    shop_id: '',
+    match_key_type: 'sku_code',
+    match_key: 'suit_xxx',
+    channel: 'affiliate_dash',
+    priority: 60,
+    enabled: true,
+    ...patch,
+  }
+}
+
+test('渠道判定：精确 SKU 规则优先于载体证据', () => {
+  const decision = resolveChannelDecision(buildItem({ has_work_order: true }), [
+    buildRule({ channel: 'third_party_voucher', priority: 10 }),
+  ])
+
+  assert.equal(decision.channel, 'third_party_voucher')
+  assert.equal(decision.source, 'auto_rule')
+  assert.equal(decision.conflict, false)
+})
+
+test('渠道判定：无规则时按载体证据判定', () => {
+  const workOrder = resolveChannelDecision(buildItem({ has_work_order: true }), [])
+  assert.equal(workOrder.channel, 'work_order')
+  assert.equal(workOrder.source, 'carrier_evidence')
+
+  const affiliate = resolveChannelDecision(buildItem({ has_affiliate_task: true }), [])
+  assert.equal(affiliate.channel, 'affiliate_dash')
+  assert.equal(affiliate.source, 'carrier_evidence')
+})
+
+test('渠道判定：既无规则也无载体时保持 pending，不兜底人工', () => {
+  const decision = resolveChannelDecision(buildItem(), [])
+  assert.equal(decision.channel, null)
+  assert.equal(decision.conflict, false)
+})
+
+test('渠道判定：同优先级多渠道判为冲突，不静默选择', () => {
+  const decision = resolveChannelDecision(buildItem(), [
+    buildRule({ id: 1, channel: 'affiliate_dash', priority: 10 }),
+    buildRule({ id: 2, channel: 'manual', priority: 10 }),
+  ])
+
+  assert.equal(decision.channel, null)
+  assert.equal(decision.conflict, true)
+  assert.deepEqual(decision.conflictChannels.sort(), ['affiliate_dash', 'manual'])
+})
+
+test('渠道判定：不同优先级时取优先级更小的', () => {
+  const decision = resolveChannelDecision(buildItem(), [
+    buildRule({ id: 1, channel: 'affiliate_dash', priority: 60 }),
+    buildRule({ id: 2, channel: 'manual', priority: 70 }),
+  ])
+
+  assert.equal(decision.channel, 'affiliate_dash')
+})
+
+test('渠道判定：provider / shop 限定生效，空串表示不限', () => {
+  const scoped = buildRule({ provider: 'pdd', shop_id: 'shop-b' })
+  assert.equal(resolveChannelDecision(buildItem(), [scoped]).channel, null)
+
+  const wide = buildRule({ provider: '', shop_id: '' })
+  assert.equal(resolveChannelDecision(buildItem(), [wide]).channel, 'affiliate_dash')
+})
+
+test('渠道判定：内部 SKU 与 SKU 名称两种键都能命中', () => {
+  const byInternal = buildRule({
+    match_key_type: 'internal_sku',
+    match_key: 'nick-001',
+    channel: 'manual',
+  })
+  assert.equal(
+    resolveChannelDecision(buildItem({ manual_sku_key: 'nick-001' }), [byInternal]).channel,
+    'manual',
+  )
+
+  const byName = buildRule({
+    match_key_type: 'sku_name',
+    match_key: '套装-测试',
+    channel: 'third_party_voucher',
+  })
+  assert.equal(
+    resolveChannelDecision(buildItem({ normalized_sku_name: '套装-测试' }), [byName]).channel,
+    'third_party_voucher',
+  )
+})
+
+test('渠道判定：停用的规则不参与', () => {
+  const decision = resolveChannelDecision(buildItem(), [buildRule({ enabled: false })])
+  assert.equal(decision.channel, null)
+})
diff --git a/apps/backend/src/services/fulfillment/channel-assign-service.ts b/apps/backend/src/services/fulfillment/channel-assign-service.ts
new file mode 100644
index 00000000..50b43051
--- /dev/null
+++ b/apps/backend/src/services/fulfillment/channel-assign-service.ts
@@ -0,0 +1,512 @@
+import { query } from '../../db/client.js'
+import { createHttpError } from '../../utils/http.js'
+import { nowIso } from '../../utils/time.js'
+import { upsertAggregatedException } from '../cost-center/cost-exception-service.js'
+import {
+  FULFILLMENT_CHANNELS,
+  MATCH_KEY_TYPES,
+  RULE_SOURCES,
+  isFulfillmentChannel,
+  isMatchKeyType,
+  isRuleSource,
+  type FulfillmentChannel,
+  type FulfillmentSource,
+  type MatchKeyType,
+  type RuleSource,
+} from './channel-types.js'
+
+/**
+ * 管道 A：渠道判定。
+ *
+ * 只写 `fulfillment_channel / fulfillment_status / fulfillment_source /
+ * fulfillment_decided_at`，绝不写商品、成本、事实，也绝不改旧 fulfillment_mode。
+ *
+ * 判定顺序：
+ *   1. 运营锁定 → 跳过
+ *   2. 精确规则（sku_channel_rules，优先级升序）；同优先级命中多渠道 → 冲突，保持 pending
+ *   3. 载体证据：已有工单 → work_order；已有自动发货任务 → affiliate_dash
+ *   4. 都没有 → 保持 pending（不再兜底成人工）
+ */
+
+export type ChannelRule = {
+  id: number
+  provider: string
+  shop_id: string
+  match_key_type: MatchKeyType
+  match_key: string
+  channel: FulfillmentChannel
+  priority: number
+  enabled: boolean
+}
+
+export type ChannelCandidateItem = {
+  id: number
+  provider: string
+  shop_id: string
+  sku_code: string
+  sku_name: string
+  manual_sku_key: string | null
+  normalized_sku_name: string | null
+  has_work_order: boolean
+  has_affiliate_task: boolean
+}
+
+export type ChannelDecision = {
+  channel: FulfillmentChannel | null
+  source: FulfillmentSource
+  conflict: boolean
+  conflictChannels: FulfillmentChannel[]
+  matchedRuleIds: number[]
+}
+
+function normalizeKey(value: unknown): string {
+  return String(value ?? '').trim()
+}
+
+function matchesScope(rule: ChannelRule, item: ChannelCandidateItem): boolean {
+  if (rule.provider && rule.provider !== item.provider) return false
+  if (rule.shop_id && rule.shop_id !== item.shop_id) return false
+  return true
+}
+
+function itemKey(item: ChannelCandidateItem, keyType: MatchKeyType): string {
+  if (keyType === 'sku_code') return normalizeKey(item.sku_code)
+  if (keyType === 'internal_sku') return normalizeKey(item.manual_sku_key)
+  return normalizeKey(item.normalized_sku_name) || normalizeKey(item.sku_name).toLowerCase()
+}
+
+/** 纯函数：给定规则与订单项，得出渠道决策（便于单测与文档对照）。 */
+export function resolveChannelDecision(
+  item: ChannelCandidateItem,
+  rules: ChannelRule[],
+): ChannelDecision {
+  const hits = rules.filter(
+    (rule) =>
+      rule.enabled &&
+      matchesScope(rule, item) &&
+      itemKey(item, rule.match_key_type) === normalizeKey(rule.match_key),
+  )
+
+  if (hits.length > 0) {
+    const minPriority = Math.min(...hits.map((rule) => rule.priority))
+    const best = hits.filter((rule) => rule.priority === minPriority)
+    const channels = [...new Set(best.map((rule) => rule.channel))]
+
+    if (channels.length > 1) {
+      return {
+        channel: null,
+        source: '',
+        conflict: true,
+        conflictChannels: channels,
+        matchedRuleIds: best.map((rule) => rule.id),
+      }
+    }
+    return {
+      channel: channels[0]!,
+      source: 'auto_rule',
+      conflict: false,
+      conflictChannels: [],
+      matchedRuleIds: best.map((rule) => rule.id),
+    }
+  }
+
+  if (item.has_work_order) {
+    return {
+      channel: 'work_order',
+      source: 'carrier_evidence',
+      conflict: false,
+      conflictChannels: [],
+      matchedRuleIds: [],
+    }
+  }
+  if (item.has_affiliate_task) {
+    return {
+      channel: 'affiliate_dash',
+      source: 'carrier_evidence',
+      conflict: false,
+      conflictChannels: [],
+      matchedRuleIds: [],
+    }
+  }
+
+  return { channel: null, source: '', conflict: false, conflictChannels: [], matchedRuleIds: [] }
+}
+
+export type AssignChannelsResult = {
+  scanned: number
+  assigned: number
+  conflicted: number
+  stillPending: number
+  lastId: number
+  byChannel: Record<string, number>
+}
+
+/** 批量判定：默认只扫 pending 且未锁定的订单项。 */
+export async function assignPendingOrderItemChannels(
+  options: { batchSize?: number; maxBatches?: number; afterId?: number } = {},
+): Promise<AssignChannelsResult> {
+  const batchSize = Math.min(5000, Math.max(1, Math.trunc(options.batchSize || 500)))
+  const maxBatches = Math.min(200, Math.max(1, Math.trunc(options.maxBatches || 20)))
+  let cursor = Math.max(0, Math.trunc(options.afterId || 0))
+
+  const rules = await loadEnabledRules()
+  const result: AssignChannelsResult = {
+    scanned: 0,
+    assigned: 0,
+    conflicted: 0,
+    stillPending: 0,
+    lastId: cursor,
+    byChannel: {},
+  }
+
+  for (let batch = 0; batch < maxBatches; batch += 1) {
+    const rows = await query<ChannelCandidateItem>(
+      `
+        SELECT
+          oi.id,
+          o.provider,
+          o.shop_id,
+          oi.sku_code,
+          oi.sku_name,
+          oi.manual_sku_key,
+          oi.normalized_sku_name,
+          EXISTS (
+            SELECT 1 FROM work_orders wo WHERE wo.order_item_id = oi.id
+          ) AS has_work_order,
+          EXISTS (
+            SELECT 1 FROM fulfillment_tasks ft
+            WHERE ft.order_item_id = oi.id AND ft.executor_key = 'affiliate_dash'
+          ) AS has_affiliate_task
+        FROM order_items oi
+        JOIN orders o ON o.id = oi.order_id
+        WHERE oi.fulfillment_status = 'pending'
+          AND oi.fulfillment_locked = FALSE
+          AND oi.id > $1
+        ORDER BY oi.id
+        LIMIT $2
+      `,
+      [cursor, batchSize],
+    )
+
+    if (rows.rows.length === 0) break
+    result.scanned += rows.rows.length
+    cursor = Number(rows.rows[rows.rows.length - 1]!.id)
+    result.lastId = cursor
+
+    const assignments: Array<{
+      id: number
+      channel: FulfillmentChannel
+      source: FulfillmentSource
+    }> = []
+
+    for (const item of rows.rows) {
+      const decision = resolveChannelDecision(item, rules)
+      if (decision.conflict) {
+        result.conflicted += 1
+        await upsertAggregatedException({
+          reason: 'routing_conflict',
+          scopeKey: `routing_conflict|${item.provider}|${item.shop_id}|${item.sku_code}|-`,
+          orderItemId: item.id,
+          detail: { channels: decision.conflictChannels, ruleIds: decision.matchedRuleIds },
+        })
+        continue
+      }
+      if (!decision.channel) {
+        result.stillPending += 1
+        continue
+      }
+      assignments.push({ id: item.id, channel: decision.channel, source: decision.source })
+      result.byChannel[decision.channel] = (result.byChannel[decision.channel] || 0) + 1
+    }
+
+    if (assignments.length > 0) {
+      const updated = await query(
+        `
+          UPDATE order_items oi
+          SET
+            fulfillment_channel = input.channel,
+            fulfillment_status = 'assigned',
+            fulfillment_source = input.source,
+            fulfillment_decided_at = NOW(),
+            updated_at = NOW()
+          FROM unnest($1::bigint[], $2::text[], $3::text[])
+            AS input(id, channel, source)
+          WHERE oi.id = input.id
+            AND oi.fulfillment_status = 'pending'
+            AND oi.fulfillment_locked = FALSE
+        `,
+        [
+          assignments.map((row) => row.id),
+          assignments.map((row) => row.channel),
+          assignments.map((row) => row.source),
+        ],
+      )
+      result.assigned += updated.rowCount || 0
+    }
+  }
+
+  return result
+}
+
+/** 运营指定渠道：写入并锁定，自动判定不再覆盖。 */
+export async function assignChannelToOrderItems(input: {
+  orderItemIds: number[]
+  channel: string
+  adminUserId: number | null
+  note?: string
+}): Promise<{ updated: number }> {
+  if (!isFulfillmentChannel(input.channel)) {
+    throw createHttpError('渠道无效', { statusCode: 400, errorCode: 'invalid_channel' })
+  }
+  const ids = [
+    ...new Set(input.orderItemIds.map(Number).filter((id) => Number.isInteger(id) && id > 0)),
+  ]
+  if (ids.length === 0) {
+    throw createHttpError('请选择订单项', { statusCode: 400, errorCode: 'order_item_required' })
+  }
+
+  const result = await query(
+    `
+      UPDATE order_items
+      SET
+        fulfillment_channel = $2,
+        fulfillment_status = 'assigned',
+        fulfillment_source = 'operator_assigned',
+        fulfillment_locked = TRUE,
+        fulfillment_decided_by = $3,
+        fulfillment_decided_at = NOW(),
+        fulfillment_reason = COALESCE(NULLIF($4, ''), fulfillment_reason),
+        updated_at = NOW()
+      WHERE id = ANY($1::bigint[])
+        AND fulfillment_status <> 'archived'
+    `,
+    [ids, input.channel, input.adminUserId, String(input.note || '').slice(0, 200)],
+  )
+
+  return { updated: result.rowCount || 0 }
+}
+
+/** 运营解锁：允许自动判定重新接管。 */
+export async function unlockChannel(orderItemIds: number[]): Promise<{ updated: number }> {
+  const ids = [...new Set(orderItemIds.map(Number).filter((id) => Number.isInteger(id) && id > 0))]
+  if (ids.length === 0) return { updated: 0 }
+  const result = await query(
+    `UPDATE order_items SET fulfillment_locked = FALSE, updated_at = NOW() WHERE id = ANY($1::bigint[])`,
+    [ids],
+  )
+  return { updated: result.rowCount || 0 }
+}
+
+export type PendingGroupRow = {
+  provider: string
+  shop_id: string
+  sku_code: string
+  sku_name: string
+  item_count: number
+  revenue_fen: number
+  first_seen_at: string
+  last_seen_at: string
+}
+
+/** 待分类队列：按 SKU 聚合，而不是一单一行。 */
+export async function listPendingChannelGroups(input: {
+  page?: number
+  pageSize?: number
+  keyword?: string
+}): Promise<{ items: PendingGroupRow[]; total: number; page: number; pageSize: number }> {
+  const page = Math.max(1, Math.trunc(Number(input.page) || 1))
+  const pageSize = Math.min(200, Math.max(1, Math.trunc(Number(input.pageSize) || 30)))
+  const keyword = String(input.keyword || '').trim()
+  const params: unknown[] = []
+  const clauses = [`oi.fulfillment_status = 'pending'`]
+  if (keyword) {
+    params.push(`%${keyword}%`)
+    clauses.push(`(oi.sku_code ILIKE $${params.length} OR oi.sku_name ILIKE $${params.length})`)
+  }
+  const where = clauses.join(' AND ')
+
+  const total = await query<{ count: number }>(
+    `
+      SELECT COUNT(*)::int AS count FROM (
+        SELECT 1
+        FROM order_items oi
+        JOIN orders o ON o.id = oi.order_id
+        WHERE ${where}
+        GROUP BY o.provider, o.shop_id, oi.sku_code, oi.sku_name
+      ) grouped
+    `,
+    params,
+  )
+
+  params.push(pageSize, (page - 1) * pageSize)
+  const rows = await query<PendingGroupRow>(
+    `
+      SELECT
+        o.provider,
+        o.shop_id,
+        oi.sku_code,
+        oi.sku_name,
+        COUNT(*)::int AS item_count,
+        COALESCE(SUM(oi.revenue_amount_fen), 0)::bigint AS revenue_fen,
+        MIN(oi.created_at) AS first_seen_at,
+        MAX(oi.created_at) AS last_seen_at
+      FROM order_items oi
+      JOIN orders o ON o.id = oi.order_id
+      WHERE ${where}
+      GROUP BY o.provider, o.shop_id, oi.sku_code, oi.sku_name
+      ORDER BY item_count DESC, oi.sku_code
+      LIMIT $${params.length - 1} OFFSET $${params.length}
+    `,
+    params,
+  )
+
+  return { items: rows.rows, total: total.rows[0]?.count || 0, page, pageSize }
+}
+
+/** 按 SKU 批量指定（待分类队列的主操作）。 */
+export async function assignChannelBySku(input: {
+  provider: string
+  shopId: string
+  skuCode: string
+  channel: string
+  adminUserId: number | null
+  note?: string
+}): Promise<{ updated: number }> {
+  if (!isFulfillmentChannel(input.channel)) {
+    throw createHttpError('渠道无效', { statusCode: 400, errorCode: 'invalid_channel' })
+  }
+  const result = await query(
+    `
+      UPDATE order_items oi
+      SET
+        fulfillment_channel = $4,
+        fulfillment_status = 'assigned',
+        fulfillment_source = 'operator_assigned',
+        fulfillment_locked = TRUE,
+        fulfillment_decided_by = $5,
+        fulfillment_decided_at = NOW(),
+        updated_at = NOW()
+      FROM orders o
+      WHERE o.id = oi.order_id
+        AND o.provider = $1
+        AND o.shop_id = $2
+        AND oi.sku_code = $3
+        AND oi.fulfillment_status = 'pending'
+    `,
+    [input.provider, input.shopId, input.skuCode, input.channel, input.adminUserId],
+  )
+  return { updated: result.rowCount || 0 }
+}
+
+export async function listChannelRules(
+  input: {
+    channel?: string
+    enabled?: boolean
+  } = {},
+): Promise<ChannelRule[]> {
+  const params: unknown[] = []
+  const clauses: string[] = []
+  if (input.channel) {
+    params.push(input.channel)
+    clauses.push(`channel = $${params.length}`)
+  }
+  if (typeof input.enabled === 'boolean') {
+    params.push(input.enabled)
+    clauses.push(`enabled = $${params.length}`)
+  }
+  const where = clauses.length > 0 ? `WHERE ${clauses.join(' AND ')}` : ''
+  const rows = await query<ChannelRule>(
+    `
+      SELECT id, provider, shop_id, match_key_type, match_key, channel, priority, enabled
+      FROM sku_channel_rules
+      ${where}
+      ORDER BY priority, channel, match_key
+    `,
+    params,
+  )
+  return rows.rows
+}
+
+export async function upsertChannelRule(input: {
+  id?: number
+  provider?: string
+  shopId?: string
+  matchKeyType: string
+  matchKey: string
+  channel: string
+  priority?: number
+  source?: string
+  enabled?: boolean
+  note?: string
+  adminUserId: number | null
+}): Promise<{ id: number }> {
+  if (!isMatchKeyType(input.matchKeyType)) {
+    throw createHttpError('匹配键类型无效', {
+      statusCode: 400,
+      errorCode: 'invalid_match_key_type',
+    })
+  }
+  if (!isFulfillmentChannel(input.channel)) {
+    throw createHttpError('渠道无效', { statusCode: 400, errorCode: 'invalid_channel' })
+  }
+  const source: RuleSource = isRuleSource(input.source) ? input.source : 'operator'
+  const matchKey = String(input.matchKey || '').trim()
+  if (!matchKey) {
+    throw createHttpError('匹配键不能为空', { statusCode: 400, errorCode: 'match_key_required' })
+  }
+
+  const result = await query<{ id: number }>(
+    `
+      INSERT INTO sku_channel_rules (
+        provider, shop_id, match_key_type, match_key, channel, priority,
+        source, enabled, note, created_by_admin_user_id, created_at, updated_at
+      )
+      VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, NOW(), NOW())
+      ON CONFLICT (provider, shop_id, match_key_type, match_key, channel)
+      DO UPDATE SET
+        priority = EXCLUDED.priority,
+        enabled = EXCLUDED.enabled,
+        note = EXCLUDED.note,
+        updated_at = NOW()
+      RETURNING id
+    `,
+    [
+      String(input.provider || '').trim(),
+      String(input.shopId || '').trim(),
+      input.matchKeyType,
+      matchKey,
+      input.channel,
+      Math.trunc(Number(input.priority) || 100),
+      source,
+      input.enabled !== false,
+      String(input.note || '').slice(0, 200),
+      input.adminUserId,
+    ],
+  )
+
+  return { id: result.rows[0]!.id }
+}
+
+export async function deleteChannelRule(ruleId: number): Promise<{ deleted: boolean }> {
+  const id = Math.trunc(Number(ruleId) || 0)
+  if (id <= 0) {
+    throw createHttpError('规则 id 无效', { statusCode: 400, errorCode: 'invalid_rule_id' })
+  }
+  const result = await query(`DELETE FROM sku_channel_rules WHERE id = $1 RETURNING id`, [id])
+  return { deleted: (result.rowCount || 0) > 0 }
+}
+
+async function loadEnabledRules(): Promise<ChannelRule[]> {
+  const rows = await query<ChannelRule>(
+    `
+      SELECT id, provider, shop_id, match_key_type, match_key, channel, priority, enabled
+      FROM sku_channel_rules
+      WHERE enabled = TRUE
+    `,
+  )
+  return rows.rows
+}
+
+export const CHANNEL_RULE_KEY_TYPES = MATCH_KEY_TYPES
+export const CHANNEL_RULE_SOURCES = RULE_SOURCES
+export const CHANNEL_VALUES = FULFILLMENT_CHANNELS
diff --git a/apps/backend/src/services/fulfillment/channel-types.ts b/apps/backend/src/services/fulfillment/channel-types.ts
new file mode 100644
index 00000000..3932b53c
--- /dev/null
+++ b/apps/backend/src/services/fulfillment/channel-types.ts
@@ -0,0 +1,72 @@
+/**
+ * 履约渠道 v2：渠道 / 状态 / 决策来源的唯一枚举定义。
+ *
+ * 与旧 `fulfillment_mode` 的区别：
+ *   · 渠道只表达「谁来做」，不包含 pending/archived 这类状态；
+ *   · 「待分类」是状态，不是渠道；
+ *   · 「第三方卡券」是渠道，但没有履约载体，只做统计。
+ */
+
+export const FULFILLMENT_CHANNELS = [
+  'work_order',
+  'affiliate_dash',
+  'third_party_voucher',
+  'manual',
+] as const
+
+export type FulfillmentChannel = (typeof FULFILLMENT_CHANNELS)[number]
+
+export const FULFILLMENT_STATUSES = ['pending', 'assigned', 'archived'] as const
+
+export type FulfillmentStatus = (typeof FULFILLMENT_STATUSES)[number]
+
+export const FULFILLMENT_SOURCES = [
+  'auto_rule',
+  'auto_mapping',
+  'carrier_evidence',
+  'manual_confirm',
+  'operator_assigned',
+  'cutover_archive',
+] as const
+
+export type FulfillmentSource = (typeof FULFILLMENT_SOURCES)[number] | ''
+
+export const CHANNEL_LABELS: Record<FulfillmentChannel, string> = {
+  work_order: '接单平台',
+  affiliate_dash: '自动发货',
+  third_party_voucher: '第三方卡券',
+  manual: '人工客服',
+}
+
+export const MATCH_KEY_TYPES = ['sku_code', 'internal_sku', 'sku_name'] as const
+
+export type MatchKeyType = (typeof MATCH_KEY_TYPES)[number]
+
+export const RULE_SOURCES = ['operator', 'affiliate', 'manual', 'voucher', 'template'] as const
+
+export type RuleSource = (typeof RULE_SOURCES)[number]
+
+/** 渠道是否需要履约载体（卡券渠道不需要）。 */
+export function channelNeedsCarrier(channel: FulfillmentChannel | null | undefined): boolean {
+  if (!channel) return false
+  return channel !== 'third_party_voucher'
+}
+
+/** 渠道是否参与成本核算。 */
+export function channelHasCostModel(channel: FulfillmentChannel | null | undefined): boolean {
+  return (
+    channel === 'affiliate_dash' || channel === 'work_order' || channel === 'third_party_voucher'
+  )
+}
+
+export function isFulfillmentChannel(value: unknown): value is FulfillmentChannel {
+  return typeof value === 'string' && (FULFILLMENT_CHANNELS as readonly string[]).includes(value)
+}
+
+export function isMatchKeyType(value: unknown): value is MatchKeyType {
+  return typeof value === 'string' && (MATCH_KEY_TYPES as readonly string[]).includes(value)
+}
+
+export function isRuleSource(value: unknown): value is RuleSource {
+  return typeof value === 'string' && (RULE_SOURCES as readonly string[]).includes(value)
+}