diff --git a/scripts/admin-test-env-acceptance.mjs b/scripts/admin-test-env-acceptance.mjs
index 69439a022..89b7e826b 100644
--- a/scripts/admin-test-env-acceptance.mjs
+++ b/scripts/admin-test-env-acceptance.mjs
@@ -1243,7 +1243,7 @@ export class AcceptanceRun {
     const createdKeys = ['orders', 'ocrInbound', 'testInbound', 'inboundMeasurement']
     const contextKeys = ['inboundWeightOcr', 'ocrInbound', 'testInbound', 'createdInbound',
       'phase3LoadingRequireSharedOverflow', 'phase3LoadingIncrementalPackageCount',
-      'phase3LoadingIncrementalDetailCount', 'orderProfile']
+      'phase3LoadingIncrementalDetailCount', 'orderProfile', 'measurementPalletOverride']
     const createdSnapshot = new Map(createdKeys.map((key) => [key, {
       present: Object.hasOwn(this.createdResources, key), value: this.createdResources[key],
     }]))
@@ -1268,8 +1268,11 @@ export class AcceptanceRun {
     const isolation = requireSharedOverflow
       ? await this.disableAvailableLocationsForA0(warehouseId, requiredPalletCount)
       : { forced: false, disabled: [] }
-    this.context.phase3LoadingRequireSharedOverflow = isolation.forced === true
+    this.context.phase3LoadingRequireSharedOverflow = requireSharedOverflow
     try {
+      if (requireSharedOverflow) {
+        this.context.measurementPalletOverride = await this.createPhase3FreshMeasurementPallet(warehouseId)
+      }
       const measurement = await import(new URL('./admin-test-env-modules/inbound-measurement.mjs', import.meta.url))
       await this.executeModule('inbound-measurement-phase3-loading-fixture', () => measurement.run(this))
     } finally {
@@ -1297,6 +1300,7 @@ export class AcceptanceRun {
     const incrementalMarker = `${originalMarker}-LOAD${suffix}-INC`
     this.marker = incrementalMarker
     this.context.phase3LoadingRequireSharedOverflow = false
+    delete this.context.measurementPalletOverride
     this.context.phase3LoadingIncrementalPackageCount = 2
     this.context.phase3LoadingIncrementalDetailCount = 4
     this.context.orderProfile = {
@@ -1462,6 +1466,37 @@ export class AcceptanceRun {
       { scenario: 'phase3-phase4-producer-fixture', deploymentBlocker: true })
   }
 
+  async createPhase3FreshMeasurementPallet(warehouseId) {
+    const module = 'phase3-loading-fixture'
+    const options = { scenario: 'phase3-loading-a0-fixture', deploymentBlocker: true }
+    const payload = {
+      warehouseId, palletType: 'STANDARD', capacityCbm: 1.5, weightKg: 25,
+      color: 'ORANGE', remark: `${this.marker}-inventory-snapshot-a0`,
+    }
+    const createResponse = await this.request('POST', '/api/platform/v1/pallets?tenantId=0', payload)
+    const palletId = String(this.apiSuccess(module, '创建本轮库存快照专用称重托盘', createResponse,
+      `warehouseId=${warehouseId}`, options) || '')
+    if (!palletId) return null
+
+    const detailResponse = await this.request('GET',
+      `/api/platform/v1/pallets/${encodeURIComponent(palletId)}?tenantId=0&warehouseId=${encodeURIComponent(warehouseId)}`)
+    const pallet = this.apiSuccess(module, '回读本轮库存快照专用称重托盘', detailResponse,
+      `palletId=${palletId}`, options)
+    const valid = String(pallet?.id || '') === palletId
+      && String(pallet?.warehouseId || '') === String(warehouseId)
+      && Boolean(String(pallet?.palletCode || '').trim())
+    this.assert(module, '本轮专用称重托盘尚未复用历史占用身份', detailResponse, valid,
+      `palletId=${palletId}, palletCode=${pallet?.palletCode || 'missing'}`, options)
+    if (!valid) return null
+
+    const fixture = {
+      id: palletId, code: String(pallet.palletCode), warehouseId: String(warehouseId),
+      marker: this.marker, retainedReason: '测量审核后成为正式库存占用，保留为开发验收证据',
+    }
+    this.createdResources.phase3LoadingFreshMeasurementPallet = fixture
+    return fixture
+  }
+
   async listAvailableLocationsForA0(warehouseId, module, options) {
     const locations = []
     const seen = new Set()
diff --git a/scripts/admin-test-env-modules/README.md b/scripts/admin-test-env-modules/README.md
index 0aa1a47e7..d7de7fe61 100644
--- a/scripts/admin-test-env-modules/README.md
+++ b/scripts/admin-test-env-modules/README.md
@@ -117,7 +117,7 @@ node --env-file="$env:USERPROFILE\.codex\chongchong-global-dev-acceptance.env" s
 
 其中，无号 push 只冻结装柜计划、建立 bridge 并使预装可见，不得创建 PDA task；订舱放舱也不创建真实货柜或 allocation。港口取得真实柜号后，四字段 link 直接补全原模拟柜并创建 allocation，原 `containerBookingId/cabinetNo/loadingPlan/items` 不变；未关联、订舱未 `RELEASED` 或整份计划未确认时，PDA 查询必须返回业务码 `A0404`。唯一确认入口为 `POST /api/platform/v1/first-leg/loading-plans/{loadingPlanId}/confirm`，请求体只含当前计划 `expectedVersion` 并携带 `Idempotency-Key`；成功必须返回 `confirmationStatus=CONFIRMED`、`readiness.readyForPda=true` 和唯一 `readiness.pdaTaskId`。验收脚本禁止调用旧入库单级 `/preload/confirming`、`/preload/confirm`。
 
-计划在 `EDITING/LOADING` 可通过正式 assignments/PATCH/DELETE 端点增量；计划、任务和明细版本必须递增，PDA 四元身份不变，旧 `inventorySnapshotToken` 必须返回 `A0409 库存已变化，请刷新后重试`。已拣项不可删或减量，未拣项可删；增量会把全拣的 `AWAITING_REVIEW` 撤回为 `IN_PROGRESS`，刷新 task detail 与 inventory 后续拣才可再次等待最终确认。最终唯一完成入口仍为 `POST /api/platform/v1/first-leg/pda-loading/tasks/{taskId}/complete`：保留同柜 `RELEASED` 订舱、bridge 与五类 ACTIVE 证据门禁；拖车状态和数量不是前置门禁。主事务提交后，零条有效拖车直接跳过，恰有一条时在独立事务尝试推进 `COMPLETED`，多条或并发冲突只记录拖车同步失败，不回滚已完成的 task/plan/inbound。PDA 结算可能先递增来源入库单版本或创建实装分片，完成动作必须在结算后重新锁定实际完成行并使用当前版本；HTTP finalizer 会回查 full/partial 履约分片，失败时保存 `requestId/traceId` 并断言 task/plan/inbound/operation 零漂移。后续模块必须复用 `phase3Loading` 发布的本轮 `taskId + inboundId + loadingPlanId + containerBookingId`，不得回退历史资源。
+计划在 `EDITING/LOADING` 可通过正式 assignments/PATCH/DELETE 端点增量；计划、任务和明细版本必须递增，PDA 四元身份不变，旧 `inventorySnapshotToken` 必须返回 `A0409 库存已变化，请刷新后重试`。完整三期装柜 fixture 通过平台托盘 API 创建本轮专用称重托盘，再交给通用测量模块；当普通位不足时由 Warehouse 自然分配到 A0，随后仅使用公开 A0 换绑接口制造库存版本变化，不直连数据库或调用内部 Warehouse 接口。主三期链强制完成该专项，四期生产矩阵的附加柜只负责跨区生产，不重复要求 A0；附加柜若自然落入 A0 仍执行同一验证。批量待分柜入口仍只复用 `TP-001`/`YW-TP-002`，不创建托盘。已拣项不可删或减量，未拣项可删；增量会把全拣的 `AWAITING_REVIEW` 撤回为 `IN_PROGRESS`，刷新 task detail 与 inventory 后续拣才可再次等待最终确认。最终唯一完成入口仍为 `POST /api/platform/v1/first-leg/pda-loading/tasks/{taskId}/complete`：保留同柜 `RELEASED` 订舱、bridge 与五类 ACTIVE 证据门禁；拖车状态和数量不是前置门禁。主事务提交后，零条有效拖车直接跳过，恰有一条时在独立事务尝试推进 `COMPLETED`，多条或并发冲突只记录拖车同步失败，不回滚已完成的 task/plan/inbound。PDA 结算可能先递增来源入库单版本或创建实装分片，完成动作必须在结算后重新锁定实际完成行并使用当前版本；HTTP finalizer 会回查 full/partial 履约分片，失败时保存 `requestId/traceId` 并断言 task/plan/inbound/operation 零漂移。后续模块必须复用 `phase3Loading` 发布的本轮 `taskId + inboundId + loadingPlanId + containerBookingId`，不得回退历史资源。
 
 `phase3-pda-convergence` 同时回查 `/tasks/pending` 与稳定 task detail：两者的 `workflowStatus`、`itemCount`、`pendingItemCount` 必须来自同一任务明细事实。全拣任务必须在两处均为 `AWAITING_REVIEW`，可执行证据 GET，但派生 `actions=[]`，不得重复发送 batch；操作历史必须恰有一次有效 `BATCH`。若 pending 仍按 assignment 返回 `IN_PROGRESS`，该轮以真实 HTTP 失败阻断，不由脚本或前端改写状态。
 
diff --git a/scripts/admin-test-env-modules/inbound-measurement.mjs b/scripts/admin-test-env-modules/inbound-measurement.mjs
index b7e2caed7..cc5115cbd 100644
--- a/scripts/admin-test-env-modules/inbound-measurement.mjs
+++ b/scripts/admin-test-env-modules/inbound-measurement.mjs
@@ -30,6 +30,13 @@ function validPdf(response) {
 
 async function reusablePallets(context, warehouseId) {
   const cacheKey = asId(warehouseId)
+  const override = context.context?.measurementPalletOverride
+  if (asId(override?.warehouseId) === cacheKey && asId(override?.id)
+      && String(override?.code || '').trim()) {
+    context.assert(MODULE, '使用编排层提供的本轮专用称重托盘', null, true,
+      `warehouseId=${warehouseId}, palletId=${asId(override.id)}`, OPTIONS)
+    return [{ id: asId(override.id), code: String(override.code) }]
+  }
   const allowAnyExistingPallet = context.context?.allowAnyExistingPallet === true
   const scopedCacheKey = `${cacheKey}:${allowAnyExistingPallet ? 'any' : 'fixed'}`
   if (reusablePalletsByWarehouse.has(scopedCacheKey)) return reusablePalletsByWarehouse.get(scopedCacheKey)
@@ -185,7 +192,7 @@ async function provisionWarehouseResources(context, { inboundId, tenantId, wareh
   context.createdResources.inboundWarehouseResources ??= {}
   context.createdResources.inboundWarehouseResources[inboundId] = {
     marker: context.marker, tenantId: '0', warehouseId: asId(warehouseId), palletCount,
-    reusablePalletCodes: REUSABLE_PALLET_CODES, resources,
+    reusablePalletCodes: candidates.map((item) => item.code), resources,
   }
   return { palletId: palletIds[0], palletIds, palletCount, resources }
 }
diff --git a/scripts/admin-test-env-modules/phase3-loading.mjs b/scripts/admin-test-env-modules/phase3-loading.mjs
index 8890a5ba4..fbaed3f88 100644
--- a/scripts/admin-test-env-modules/phase3-loading.mjs
+++ b/scripts/admin-test-env-modules/phase3-loading.mjs
@@ -760,12 +760,15 @@ export async function run(context) {
     if (refreshedInventory?.snapshotToken) {
       effectiveBatchPayload = { ...batchPayload, inventorySnapshotToken: refreshedInventory.snapshotToken }
     }
-  } else {
+  } else if (context.context?.phase3LoadingRequireSharedOverflow === true) {
     context.addStep(MODULE, '自动制造库存变化并验证旧 snapshot token A0409', null, false,
       `本轮 ${inventoryInbound?.resources?.length ?? 0} 条占用没有可安全换绑的 A0 临时占用；不得以 coverageGap 作为通过`, OPTIONS)
     context.addCoverageGap(MODULE, OPTIONS.scenario, 'PDA 真实库存变化后的旧快照冲突与刷新重试',
       `inventory-snapshot 已真实返回 taskId=${canonicalTaskId}、warehouseId=${warehouseId} 并验证稳定 token/version=${inventorySnapshotVerified}；本轮 ${inventoryInbound?.resources?.length ?? 0} 条占用均为普通库位，当前唯一平台代理库存变更入口只允许 A0 临时占用换绑，不能安全改动普通占用或调用内部 Warehouse 接口`,
       'fixture')
+  } else {
+    context.addStep(MODULE, '附加生产者不重复要求 A0 库存快照变更专项', null, true,
+      '主三期装柜链已独立强制验证；当前变体仅生成四期跨区生产者', OPTIONS)
   }
 
   const canonicalPick = await request(context, 'POST', batchPath, effectiveBatchPayload,
diff --git a/scripts/admin-test-env-modules/phase3-producer-chain-contract.test.mjs b/scripts/admin-test-env-modules/phase3-producer-chain-contract.test.mjs
index 2db771bdc..bd1ef2a7f 100644
--- a/scripts/admin-test-env-modules/phase3-producer-chain-contract.test.mjs
+++ b/scripts/admin-test-env-modules/phase3-producer-chain-contract.test.mjs
@@ -546,18 +546,26 @@ test('phase3 loading fixture paginates A0 candidates and refuses mass location m
   const orders = source('./orders.mjs')
   assertOrder(entry, [
     'disableAvailableLocationsForA0(warehouseId, requiredPalletCount)',
-    'this.context.phase3LoadingRequireSharedOverflow = isolation.forced === true',
+    'this.context.phase3LoadingRequireSharedOverflow = requireSharedOverflow',
+    'createPhase3FreshMeasurementPallet(warehouseId)',
     "executeModule('inbound-measurement-phase3-loading-fixture'",
     'restoreAvailableLocationsAfterA0(warehouseId, isolation)',
   ])
   assert.match(entry, /page=\$\{pageNumber\}&size=\$\{A0_LOCATION_PAGE_SIZE\}/)
   assert.match(entry, /A0_MAX_LOCATION_MUTATIONS = 8/)
   assert.match(entry, /A0 大仓保护：不批量停用普通库位/)
+  assert.match(entry, /创建本轮库存快照专用称重托盘/)
+  assert.match(entry, /\/api\/platform\/v1\/pallets\?tenantId=0/)
+  assert.match(entry, /measurementPalletOverride/)
+  assert.doesNotMatch(entry, /internal\/warehouse.*inventory-snapshot-a0/)
   assert.match(entry, /remainingNormal\.length < isolation\.requiredSlots/)
   assert.match(entry, /\/locations\/\$\{encodeURIComponent\(location\.id\)\}\/status/)
   assert.match(entry, /\{ status: 'DISABLED', version: Number\(location\.version\) \}/)
   assert.match(entry, /\{ status: 'AVAILABLE', version: location\.version \}/)
   assert.match(orders, /receivingWarehouseId: id\(master\.receiving\.id\)/)
+  const loading = source('./phase3-loading.mjs')
+  assert.match(loading, /context\.context\?\.phase3LoadingRequireSharedOverflow === true/)
+  assert.match(loading, /附加生产者不重复要求 A0 库存快照变更专项/)
 })
 
 test('customs reuses the loading chain released booking without pre-completing truck', () => {