diff --git a/project-docs/phase13-legal-knowledge-template-library/evidence/phase13-review-return-preflight-workflow.md b/project-docs/phase13-legal-knowledge-template-library/evidence/phase13-review-return-preflight-workflow.md
new file mode 100644
index 00000000..43bbac0c
--- /dev/null
+++ b/project-docs/phase13-legal-knowledge-template-library/evidence/phase13-review-return-preflight-workflow.md
@@ -0,0 +1,42 @@
+# 阶段 13 回收结果预检与合并计划工作流
+
+本文档说明真实复核结果回收后，如何在写入专家复核登记表前进行自动预检。
+
+## 一、目标
+
+1. 检查法务、业务和签收回收文件是否齐套。
+2. 校验字段、复核结果枚举、复核人、复核日期和证据路径。
+3. 与 `expert-review-register.csv` 做差异预览。
+4. 生成合并计划，先进入 DryRun，再允许受保护回填。
+
+## 二、自动化脚本
+
+```powershell
+powershell.exe -NoProfile -ExecutionPolicy Bypass -File scripts\run-phase13-review-return-preflight.ps1
+```
+
+脚本默认读取最新复核派发包中的：
+
+```text
+reviewer-kits/return-templates/
+```
+
+## 三、输出产物
+
+1. `return-source-manifest.csv`：回收文件来源和字段结构。
+2. `return-validation-board.csv`：逐项预检看板。
+3. `return-preflight-blockers.csv`：阻塞项。
+4. `return-diff-preview.csv`：与专家复核登记表的差异预览。
+5. `return-merge-plan.csv`：回填前合并计划。
+6. `phase13-review-return-preflight-summary.json` 和 `.md`：门禁摘要。
+
+## 四、门禁规则
+
+1. 回收文件缺失或字段缺失为 `FAIL`。
+2. 回收文件仍为 `PENDING` 为 `BLOCKED`。
+3. 缺少复核人、复核日期或证据路径为 `BLOCKED`。
+4. 只有全部回收结果通过预检后，才允许进入 `apply-phase13-review-results.ps1` DryRun。
+
+## 五、安全规则
+
+本脚本只做预检和合并计划，不写入专家复核登记表，不修改资产状态，不推进生产发布。
diff --git a/project-docs/阶段13-法律知识库与合同模板库建设闭环第十八批执行记录-2026-05-02.md b/project-docs/阶段13-法律知识库与合同模板库建设闭环第十八批执行记录-2026-05-02.md
new file mode 100644
index 00000000..351f9f70
--- /dev/null
+++ b/project-docs/阶段13-法律知识库与合同模板库建设闭环第十八批执行记录-2026-05-02.md
@@ -0,0 +1,66 @@
+# AI合同平台 阶段 13 法律知识库与合同模板库建设闭环第十八批执行记录（2026-05-02）
+
+## 一、阶段结论
+
+本批次完成 `回收结果预检与差异合并工作台`，当前状态为 `BLOCKED_ON_REAL_RETURN_INPUT`。
+
+第十七批已经能导出复核派发包、回收模板和哈希留痕。本批次继续补齐回收后的自动化预检能力，确保真实复核结果在写入专家复核登记表前先完成字段校验、枚举校验、证据路径校验、差异预览和合并计划。
+
+## 二、本批次交付
+
+新增或更新内容：
+
+1. `scripts/run-phase13-review-return-preflight.ps1`。
+2. `scripts/run-phase13-review-control-center.ps1`，把回收预检纳入总控。
+3. `scripts/run-legal-knowledge-library-gate.ps1`，纳入新增脚本检查。
+4. `project-docs/phase13-legal-knowledge-template-library/evidence/phase13-review-return-preflight-workflow.md`。
+
+## 三、回收预检范围
+
+脚本默认读取最新复核派发包中的 `reviewer-kits/return-templates/`，覆盖：
+
+| 回收文件 | 数量 |
+|---|---:|
+| 法务复核回收记录 | 22 |
+| 业务复核回收记录 | 18 |
+| 签收回收记录 | 2 |
+| 预检总记录 | 42 |
+
+## 四、自动化门禁
+
+门禁规则：
+
+1. 回收文件缺失或字段缺失为 `FAIL`。
+2. 回收结果仍为 `PENDING` 为 `BLOCKED`。
+3. 缺少复核人、复核日期或证据路径为 `BLOCKED`。
+4. 只有通过预检后，才允许进入 `apply-phase13-review-results.ps1` DryRun。
+
+## 五、当前状态
+
+当前回收模板仍是派发前模板，所有复核结论均保持 `PENDING`，签收也保持未完成。因此门禁保持 `BLOCKED` 是正确状态。
+
+## 六、自动化验证结果
+
+```text
+PHASE13_REVIEW_RETURN_PREFLIGHT_BLOCKED
+PHASE13_LEGAL_KNOWLEDGE_LIBRARY_GATE_PASS_WITH_LEGAL_REVIEW_REQUIRED
+PHASE13_REVIEW_CONTROL_CENTER_BLOCKED
+```
+
+关键指标：
+
+| 指标 | 结果 |
+|---|---:|
+| 法务回收记录 | 22 |
+| 业务回收记录 | 18 |
+| 签收回收记录 | 2 |
+| 预检记录 | 42 |
+| 可进入 DryRun 回填 | 0 |
+| 回收预检阻塞项 | 42 |
+| 总控准入评分 | 3/13 |
+
+## 七、下一步
+
+下一步可以继续自动推进“真实回填保护与资产状态迁移预案”，把预检通过后的合并计划进一步转成受保护写入、资产状态迁移和回滚证据。
+
+阶段 13 第十八批当前状态：`BLOCKED_ON_REAL_RETURN_INPUT`。
diff --git a/scripts/run-legal-knowledge-library-gate.ps1 b/scripts/run-legal-knowledge-library-gate.ps1
index 6ff1a122..a9b6267f 100644
--- a/scripts/run-legal-knowledge-library-gate.ps1
+++ b/scripts/run-legal-knowledge-library-gate.ps1
@@ -321,6 +321,10 @@ function Test-SecretLeak {
   if (Test-Path -LiteralPath $reviewerKitExportScriptPath -PathType Leaf) {
     $files += Get-Item -LiteralPath $reviewerKitExportScriptPath
   }
+  $reviewReturnPreflightScriptPath = Join-Path $repoRoot "scripts\run-phase13-review-return-preflight.ps1"
+  if (Test-Path -LiteralPath $reviewReturnPreflightScriptPath -PathType Leaf) {
+    $files += Get-Item -LiteralPath $reviewReturnPreflightScriptPath
+  }
   foreach ($file in $files) {
     $match = Select-String -LiteralPath $file.FullName -Pattern $adminPasswordLiteral -List -ErrorAction SilentlyContinue
     if ($match) {
@@ -402,6 +406,7 @@ $commonDocFiles = @(
   "scripts\run-phase13-review-task-package-gate.ps1",
   "scripts\run-phase13-review-intake-gate.ps1",
   "scripts\export-phase13-reviewer-kit.ps1",
+  "scripts\run-phase13-review-return-preflight.ps1",
   "project-docs\phase13-legal-knowledge-template-library\review-intake\reviewer-intake-template.csv",
   "project-docs\phase13-legal-knowledge-template-library\review-intake\README.md"
 )
diff --git a/scripts/run-phase13-review-control-center.ps1 b/scripts/run-phase13-review-control-center.ps1
index af61ff4d..a9f69d77 100644
--- a/scripts/run-phase13-review-control-center.ps1
+++ b/scripts/run-phase13-review-control-center.ps1
@@ -213,6 +213,7 @@ $stages = @(
   [pscustomobject]@{ key = "review_intake"; label = "真实复核输入接入"; root = "project-docs\qa-artifacts\phase13-review-intake-gate"; summary = "phase13-review-intake-gate-summary.json" },
   [pscustomobject]@{ key = "task_package"; label = "复核任务包与验收追踪"; root = "project-docs\qa-artifacts\phase13-review-task-package-gate"; summary = "phase13-review-task-package-gate-summary.json" },
   [pscustomobject]@{ key = "reviewer_kit"; label = "复核派发包导出"; root = "project-docs\qa-artifacts\phase13-reviewer-kit-export"; summary = "phase13-reviewer-kit-export-summary.json" },
+  [pscustomobject]@{ key = "return_preflight"; label = "回收结果预检与合并计划"; root = "project-docs\qa-artifacts\phase13-review-return-preflight"; summary = "phase13-review-return-preflight-summary.json" },
   [pscustomobject]@{ key = "handoff"; label = "复核交付回收"; root = "project-docs\qa-artifacts\phase13-review-handoff-gate"; summary = "phase13-review-handoff-gate-summary.json" },
   [pscustomobject]@{ key = "progress"; label = "复核进度催办"; root = "project-docs\qa-artifacts\phase13-review-progress-gate"; summary = "phase13-review-progress-gate-summary.json" },
   [pscustomobject]@{ key = "result_apply"; label = "复核结果回填"; root = "project-docs\qa-artifacts\phase13-review-result-apply"; summary = "phase13-review-result-apply-summary.json" },
@@ -242,6 +243,7 @@ $firstWave = $summaries["first_wave"]
 $reviewIntake = $summaries["review_intake"]
 $taskPackage = $summaries["task_package"]
 $reviewerKit = $summaries["reviewer_kit"]
+$returnPreflight = $summaries["return_preflight"]
 $handoff = $summaries["handoff"]
 $progress = $summaries["progress"]
 $resultApply = $summaries["result_apply"]
@@ -263,6 +265,9 @@ $taskPackageBlockedOrders = [int](Get-MetricValue -Summary $taskPackage -Name "b
 $reviewerKitFiles = [int](Get-MetricValue -Summary $reviewerKit -Name "kit_files")
 $reviewerKitHashRows = [int](Get-MetricValue -Summary $reviewerKit -Name "hash_manifest_rows")
 $reviewerKitReadyOrders = [int](Get-MetricValue -Summary $reviewerKit -Name "task_ready_to_dispatch_orders")
+$returnPreflightRows = [int](Get-MetricValue -Summary $returnPreflight -Name "validation_rows")
+$returnPreflightMergeReadyRows = [int](Get-MetricValue -Summary $returnPreflight -Name "merge_ready_rows")
+$returnPreflightBlockers = [int](Get-MetricValue -Summary $returnPreflight -Name "blocker_count")
 $handoffBlockers = [int](Get-MetricValue -Summary $handoff -Name "blockers")
 $handoffAckRows = [int](Get-MetricValue -Summary $handoff -Name "acknowledged_rows")
 $ackPending = [int](Get-MetricValue -Summary $progress -Name "ack_pending")
@@ -281,6 +286,7 @@ Add-Score -Key "business_reviewer_assigned" -Label "真实业务复核人已分
 Add-Score -Key "review_intake_ready" -Label "真实复核输入配置已齐套" -Ready ($reviewIntakeStatus -eq "PASS" -and $intakeRequiredRoles -gt 0 -and $intakeReadyRoles -eq $intakeRequiredRoles) -Evidence "intake_status=$reviewIntakeStatus; ready_roles=$intakeReadyRoles; required_roles=$intakeRequiredRoles; blocked_roles=$intakeBlockedRoles" -Blocker "真实复核输入配置未齐套"
 Add-Score -Key "review_task_package_generated" -Label "复核任务包与验收追踪已生成" -Ready ($taskPackageAcceptanceRows -ge 42) -Evidence "acceptance_tracking_rows=$taskPackageAcceptanceRows; ready_to_dispatch_orders=$taskPackageReadyOrders; blocked_orders=$taskPackageBlockedOrders" -Blocker "复核任务包或验收追踪未齐套"
 Add-Score -Key "reviewer_kit_exported" -Label "复核派发包已导出并哈希留痕" -Ready ($reviewerKitFiles -gt 0 -and $reviewerKitHashRows -gt 0) -Evidence "kit_files=$reviewerKitFiles; hash_manifest_rows=$reviewerKitHashRows; ready_orders=$reviewerKitReadyOrders" -Blocker "复核派发包尚未导出"
+Add-Score -Key "return_preflight_generated" -Label "回收结果预检与合并计划已生成" -Ready ($returnPreflightRows -ge 42) -Evidence "validation_rows=$returnPreflightRows; merge_ready_rows=$returnPreflightMergeReadyRows; blockers=$returnPreflightBlockers" -Blocker "回收结果预检或合并计划未生成"
 Add-Score -Key "review_due_date_set" -Label "复核截止日期已设置" -Ready (-not $firstWaveDueMissing) -Evidence "due_date_missing=$firstWaveDueMissing" -Blocker "缺少复核截止日期"
 Add-Score -Key "handoff_acknowledged" -Label "复核交付已签收" -Ready ($ackPending -eq 0 -and $handoffAckRows -gt 0) -Evidence "ack_pending=$ackPending; acknowledged_rows=$handoffAckRows" -Blocker "签收未完成"
 Add-Score -Key "review_activity_started" -Label "真实复核活动已发生" -Ready ($completedReviews -gt 0 -or $pendingReviews -lt 22) -Evidence "pending_reviews=$pendingReviews; completed_reviews=$completedReviews" -Blocker "没有真实复核活动记录"
@@ -310,6 +316,9 @@ if ($taskPackageAcceptanceRows -lt 42) {
 if ($reviewerKitFiles -eq 0 -or $reviewerKitHashRows -eq 0) {
   Add-NextAction -Priority "P0" -Owner "法律资料运营" -Action "导出复核派发包并生成哈希留痕" -Acceptance "kit_files>0 且 hash_manifest_rows>0" -Gate "export-phase13-reviewer-kit.ps1"
 }
+if ($returnPreflightRows -lt 42) {
+  Add-NextAction -Priority "P0" -Owner "法律资料运营" -Action "生成回收结果预检与合并计划" -Acceptance "validation_rows>=42" -Gate "run-phase13-review-return-preflight.ps1"
+}
 if ($firstWaveDueMissing) {
   Add-NextAction -Priority "P0" -Owner "交付负责人" -Action "设置首批 P0 复核截止日期" -Acceptance "due_date_missing=false" -Gate "run-phase13-first-wave-review-readiness.ps1 / run-phase13-review-progress-gate.ps1"
 }
@@ -382,6 +391,9 @@ $metrics = [ordered]@{
   reviewer_kit_files = $reviewerKitFiles
   reviewer_kit_hash_rows = $reviewerKitHashRows
   reviewer_kit_ready_orders = $reviewerKitReadyOrders
+  return_preflight_rows = $returnPreflightRows
+  return_preflight_merge_ready_rows = $returnPreflightMergeReadyRows
+  return_preflight_blockers = $returnPreflightBlockers
   missing_legal_reviewer_tasks = $missingLegalReviewer
   missing_business_reviewer_tasks = $missingBusinessReviewer
   ack_pending = $ackPending
@@ -447,6 +459,9 @@ $md.Add("| 任务包可派发项 | $($metrics.task_package_ready_orders) |") | O
 $md.Add("| 任务包阻塞项 | $($metrics.task_package_blocked_orders) |") | Out-Null
 $md.Add("| 派发包文件 | $($metrics.reviewer_kit_files) |") | Out-Null
 $md.Add("| 派发包哈希留痕 | $($metrics.reviewer_kit_hash_rows) |") | Out-Null
+$md.Add("| 回收预检记录 | $($metrics.return_preflight_rows) |") | Out-Null
+$md.Add("| 回收预检可合并项 | $($metrics.return_preflight_merge_ready_rows) |") | Out-Null
+$md.Add("| 回收预检阻塞项 | $($metrics.return_preflight_blockers) |") | Out-Null
 $md.Add("| 未分配法务复核 | $($metrics.missing_legal_reviewer_tasks) |") | Out-Null
 $md.Add("| 未分配业务复核 | $($metrics.missing_business_reviewer_tasks) |") | Out-Null
 $md.Add("| 未完成签收 | $($metrics.ack_pending) |") | Out-Null
diff --git a/scripts/run-phase13-review-return-preflight.ps1 b/scripts/run-phase13-review-return-preflight.ps1
new file mode 100644
index 00000000..45ed706c
--- /dev/null
+++ b/scripts/run-phase13-review-return-preflight.ps1
@@ -0,0 +1,472 @@
+param(
+  [string]$ReturnRoot = "",
+  [string]$ReviewRegisterPath = "",
+  [string]$ArtifactRoot = "",
+  [switch]$FailOnBlocked
+)
+
+$ErrorActionPreference = "Stop"
+
+$repoRoot = (Resolve-Path (Join-Path $PSScriptRoot "..")).Path
+$timestamp = Get-Date -Format "yyyy-MM-ddTHH-mm-ss-fff"
+
+function Resolve-LatestArtifactDir {
+  param([string]$RootRelativePath)
+  $root = Join-Path $repoRoot $RootRelativePath
+  $latest = Get-ChildItem -LiteralPath $root -Directory -ErrorAction SilentlyContinue |
+    Sort-Object Name -Descending |
+    Select-Object -First 1
+  if ($latest) {
+    return $latest.FullName
+  }
+  return ""
+}
+
+if ([string]::IsNullOrWhiteSpace($ReturnRoot)) {
+  $latestKit = Resolve-LatestArtifactDir -RootRelativePath "project-docs\qa-artifacts\phase13-reviewer-kit-export"
+  if (-not [string]::IsNullOrWhiteSpace($latestKit)) {
+    $ReturnRoot = Join-Path $latestKit "reviewer-kits\return-templates"
+  }
+}
+if (-not [string]::IsNullOrWhiteSpace($ReturnRoot) -and -not [System.IO.Path]::IsPathRooted($ReturnRoot)) {
+  $ReturnRoot = Join-Path $repoRoot $ReturnRoot
+}
+
+if ([string]::IsNullOrWhiteSpace($ReviewRegisterPath)) {
+  $ReviewRegisterPath = Join-Path $repoRoot "project-docs\phase13-legal-knowledge-template-library\inventories\expert-review-register.csv"
+}
+if (-not [System.IO.Path]::IsPathRooted($ReviewRegisterPath)) {
+  $ReviewRegisterPath = Join-Path $repoRoot $ReviewRegisterPath
+}
+
+if ([string]::IsNullOrWhiteSpace($ArtifactRoot)) {
+  $ArtifactRoot = Join-Path $repoRoot "project-docs\qa-artifacts\phase13-review-return-preflight"
+}
+if (-not [System.IO.Path]::IsPathRooted($ArtifactRoot)) {
+  $ArtifactRoot = Join-Path $repoRoot $ArtifactRoot
+}
+
+$artifactDir = Join-Path $ArtifactRoot $timestamp
+New-Item -ItemType Directory -Force -Path $artifactDir | Out-Null
+
+$summaryJson = Join-Path $artifactDir "phase13-review-return-preflight-summary.json"
+$summaryMd = Join-Path $artifactDir "phase13-review-return-preflight-summary.md"
+$sourceManifestCsv = Join-Path $artifactDir "return-source-manifest.csv"
+$validationBoardCsv = Join-Path $artifactDir "return-validation-board.csv"
+$blockersCsv = Join-Path $artifactDir "return-preflight-blockers.csv"
+$diffPreviewCsv = Join-Path $artifactDir "return-diff-preview.csv"
+$mergePlanCsv = Join-Path $artifactDir "return-merge-plan.csv"
+$gitStatusPath = Join-Path $artifactDir "git-status.txt"
+
+$checks = New-Object System.Collections.Generic.List[object]
+$sourceRows = New-Object System.Collections.Generic.List[object]
+$validationRows = New-Object System.Collections.Generic.List[object]
+$blockerRows = New-Object System.Collections.Generic.List[object]
+$diffRows = New-Object System.Collections.Generic.List[object]
+$mergeRows = New-Object System.Collections.Generic.List[object]
+
+$reviewRequiredColumns = @("review_id", "asset_type", "asset_id", "asset_name", "reviewer_role", "reviewer", "review_date", "review_result", "required_changes", "evidence_path", "allow_review_import", "allow_production_release", "notes")
+$ackRequiredColumns = @("work_order_id", "recipient_role", "recipient", "handoff_owner", "acknowledged", "ack_date", "package_path", "missing_materials", "notes")
+$allowedReviewResults = @("PENDING", "CHANGES_REQUIRED", "APPROVED_FOR_REVIEW_IMPORT", "APPROVED_FOR_PRODUCTION", "REJECTED")
+
+function Add-Check {
+  param(
+    [string]$Key,
+    [string]$Label,
+    [ValidateSet("pass", "fail", "warn", "skip", "blocked")]
+    [string]$Status,
+    [string]$Detail,
+    [bool]$Required = $true,
+    [hashtable]$Meta = @{}
+  )
+
+  $checks.Add([ordered]@{
+    key = $Key
+    label = $Label
+    status = $Status
+    required = $Required
+    detail = $Detail
+    meta = $Meta
+  }) | Out-Null
+}
+
+function Add-Blocker {
+  param([string]$Kind, [string]$Id, [string]$Severity, [string]$Blocker, [string]$Evidence)
+  $blockerRows.Add([pscustomobject][ordered]@{
+    kind = $Kind
+    id = $Id
+    severity = $Severity
+    blocker = $Blocker
+    evidence = $Evidence
+  }) | Out-Null
+}
+
+function Save-Json {
+  param([string]$Path, [object]$Value)
+  $Value | ConvertTo-Json -Depth 50 | Set-Content -Encoding UTF8 -Path $Path
+}
+
+function Import-CsvRows {
+  param([string]$Path)
+  if (-not (Test-Path -LiteralPath $Path -PathType Leaf)) {
+    return @()
+  }
+  return @(Import-Csv -LiteralPath $Path)
+}
+
+function Get-CsvHeader {
+  param([string]$Path)
+  if (-not (Test-Path -LiteralPath $Path -PathType Leaf)) {
+    return @()
+  }
+  $firstLine = Get-Content -LiteralPath $Path -Encoding UTF8 -TotalCount 1
+  if ([string]::IsNullOrWhiteSpace($firstLine)) {
+    return @()
+  }
+  return @($firstLine.Split(",") | ForEach-Object { $_.Trim().Trim('"') })
+}
+
+function Test-RequiredColumns {
+  param([string]$Path, [string[]]$Columns)
+  $header = Get-CsvHeader -Path $Path
+  return @($Columns | Where-Object { $header -notcontains $_ })
+}
+
+function Test-Truthy {
+  param([string]$Value)
+  if ([string]::IsNullOrWhiteSpace($Value)) {
+    return $false
+  }
+  return @("true", "yes", "1", "是", "已签收") -contains $Value.Trim().ToLowerInvariant()
+}
+
+function Test-PendingName {
+  param([string]$Value)
+  if ([string]::IsNullOrWhiteSpace($Value)) {
+    return $true
+  }
+  return ($Value -match "待指定|待确认|待复核|占位|示例")
+}
+
+function Convert-OverallStatusText {
+  param([string]$Status)
+  switch ($Status) {
+    "PASS" { return "通过" }
+    "WARN" { return "通过但有警告" }
+    "FAIL" { return "未通过" }
+    "BLOCKED" { return "阻塞" }
+    default { return $Status }
+  }
+}
+
+function Convert-CheckStatusText {
+  param([string]$Status)
+  switch ($Status) {
+    "pass" { return "通过" }
+    "fail" { return "失败" }
+    "warn" { return "警告" }
+    "skip" { return "跳过" }
+    "blocked" { return "阻塞" }
+    default { return $Status }
+  }
+}
+
+if (-not (Test-Path "$HOME\.Codex\skills\gstack\bin")) {
+  Add-Check -Key "gstack" -Label "gstack 前置检查" -Status "fail" -Detail "gstack 缺失"
+} else {
+  Add-Check -Key "gstack" -Label "gstack 前置检查" -Status "pass" -Detail "GSTACK_OK"
+}
+
+$branch = (git -C $repoRoot rev-parse --abbrev-ref HEAD).Trim()
+$commit = (git -C $repoRoot rev-parse HEAD).Trim()
+$remoteUrl = (git -C $repoRoot remote get-url origin).Trim()
+$gitStatus = git -C $repoRoot status --short
+($gitStatus -join [Environment]::NewLine) | Set-Content -Encoding UTF8 -Path $gitStatusPath
+
+if ($remoteUrl -match "192\.168\.3\.90") {
+  Add-Check -Key "origin_remote" -Label "origin 远端仓库" -Status "pass" -Detail "origin 指向 192.168.3.90" -Meta @{ branch = $branch; commit = $commit; remote = $remoteUrl }
+} else {
+  Add-Check -Key "origin_remote" -Label "origin 远端仓库" -Status "fail" -Detail "origin 未指向 192.168.3.90" -Meta @{ branch = $branch; commit = $commit; remote = $remoteUrl }
+}
+
+if ($gitStatus) {
+  Add-Check -Key "working_tree" -Label "工作区状态" -Status "warn" -Required $false -Detail "工作区存在未提交改动；回收预检按证据记录" -Meta @{ artifact = $gitStatusPath }
+} else {
+  Add-Check -Key "working_tree" -Label "工作区状态" -Status "pass" -Detail "工作区干净" -Meta @{ artifact = $gitStatusPath }
+}
+
+if (Test-Path -LiteralPath $ReturnRoot -PathType Container) {
+  Add-Check -Key "return_root" -Label "回收文件目录" -Status "pass" -Detail "回收文件目录存在" -Meta @{ path = $ReturnRoot }
+} else {
+  Add-Check -Key "return_root" -Label "回收文件目录" -Status "fail" -Detail "回收文件目录不存在" -Meta @{ path = $ReturnRoot }
+}
+
+$registerRows = Import-CsvRows -Path $ReviewRegisterPath
+$registerByReviewId = @{}
+foreach ($registerRow in $registerRows) {
+  if ($registerRow.review_id) {
+    $registerByReviewId[$registerRow.review_id] = $registerRow
+  }
+}
+
+$returnFiles = @(
+  [pscustomobject]@{ kind = "legal"; path = Join-Path $ReturnRoot "legal-review-result-return.csv"; required_columns = $reviewRequiredColumns },
+  [pscustomobject]@{ kind = "business"; path = Join-Path $ReturnRoot "business-review-result-return.csv"; required_columns = $reviewRequiredColumns },
+  [pscustomobject]@{ kind = "ack"; path = Join-Path $ReturnRoot "handoff-ack-return.csv"; required_columns = $ackRequiredColumns }
+)
+
+$allReviewReturns = New-Object System.Collections.Generic.List[object]
+$ackReturns = @()
+foreach ($returnFile in $returnFiles) {
+  $exists = Test-Path -LiteralPath $returnFile.path -PathType Leaf
+  $missing = if ($exists) { Test-RequiredColumns -Path $returnFile.path -Columns $returnFile.required_columns } else { $returnFile.required_columns }
+  $rows = if ($exists) { Import-CsvRows -Path $returnFile.path } else { @() }
+  $sourceRows.Add([pscustomobject][ordered]@{
+    kind = $returnFile.kind
+    path = $returnFile.path
+    exists = $exists
+    rows = $rows.Count
+    missing_columns = ($missing -join ";")
+    status = if ($exists -and $missing.Count -eq 0) { "ready" } else { "invalid" }
+  }) | Out-Null
+  if (-not $exists) {
+    Add-Blocker -Kind $returnFile.kind -Id $returnFile.path -Severity "P0" -Blocker "回收文件缺失" -Evidence $returnFile.path
+  } elseif ($missing.Count -gt 0) {
+    Add-Blocker -Kind $returnFile.kind -Id $returnFile.path -Severity "P0" -Blocker "回收文件字段缺失" -Evidence ($missing -join ",")
+  }
+  if ($returnFile.kind -eq "ack") {
+    $ackReturns = $rows
+  } else {
+    foreach ($row in $rows) {
+      $allReviewReturns.Add($row) | Out-Null
+    }
+  }
+}
+$sourceRows | Export-Csv -LiteralPath $sourceManifestCsv -NoTypeInformation -Encoding UTF8
+
+foreach ($row in $allReviewReturns) {
+  $reviewResult = if ($row.review_result) { $row.review_result.Trim() } else { "" }
+  $reviewId = [string]$row.review_id
+  $inRegister = $registerByReviewId.ContainsKey($reviewId)
+  $resultAllowed = $allowedReviewResults -contains $reviewResult
+  $reviewerReady = -not (Test-PendingName -Value $row.reviewer)
+  $dateReady = -not [string]::IsNullOrWhiteSpace($row.review_date)
+  $evidenceReady = -not [string]::IsNullOrWhiteSpace($row.evidence_path)
+  $completed = ($reviewResult -ne "PENDING" -and $resultAllowed -and $reviewerReady -and $dateReady -and $evidenceReady)
+  $mergeAction = if ($completed) { "READY_FOR_DRY_RUN_APPLY" } else { "HOLD" }
+
+  if (-not $inRegister) {
+    Add-Blocker -Kind "review_return" -Id $reviewId -Severity "P0" -Blocker "复核编号不在专家复核登记表中" -Evidence $reviewId
+  }
+  if (-not $resultAllowed) {
+    Add-Blocker -Kind "review_return" -Id $reviewId -Severity "P0" -Blocker "复核结果枚举非法" -Evidence $reviewResult
+  }
+  if ($reviewResult -eq "PENDING") {
+    Add-Blocker -Kind "review_return" -Id $reviewId -Severity "P0" -Blocker "复核结果仍为 PENDING" -Evidence $reviewId
+  } elseif (-not $completed) {
+    Add-Blocker -Kind "review_return" -Id $reviewId -Severity "P0" -Blocker "复核结果缺少复核人、日期或证据路径" -Evidence "reviewer=$($row.reviewer); date=$($row.review_date); evidence=$($row.evidence_path)"
+  }
+
+  $validationRows.Add([pscustomobject][ordered]@{
+    kind = "review_return"
+    review_id = $reviewId
+    asset_id = $row.asset_id
+    reviewer_role = $row.reviewer_role
+    reviewer = $row.reviewer
+    review_result = $reviewResult
+    in_register = $inRegister
+    result_allowed = $resultAllowed
+    reviewer_ready = $reviewerReady
+    date_ready = $dateReady
+    evidence_ready = $evidenceReady
+    completed = $completed
+    merge_action = $mergeAction
+  }) | Out-Null
+
+  $current = if ($inRegister) { $registerByReviewId[$reviewId] } else { $null }
+  $diffRows.Add([pscustomobject][ordered]@{
+    review_id = $reviewId
+    field = "review_result"
+    current_value = if ($current) { $current.review_result } else { "" }
+    returned_value = $reviewResult
+    merge_action = $mergeAction
+  }) | Out-Null
+
+  $mergeRows.Add([pscustomobject][ordered]@{
+    review_id = $reviewId
+    asset_type = $row.asset_type
+    asset_id = $row.asset_id
+    merge_action = $mergeAction
+    next_gate = "apply-phase13-review-results.ps1"
+    notes = if ($completed) { "可进入 DryRun 回填校验" } else { "等待真实复核结果齐套" }
+  }) | Out-Null
+}
+
+foreach ($ack in $ackReturns) {
+  $acknowledged = Test-Truthy -Value $ack.acknowledged
+  $dateReady = -not [string]::IsNullOrWhiteSpace($ack.ack_date)
+  $recipientReady = -not (Test-PendingName -Value $ack.recipient)
+  $completed = ($acknowledged -and $dateReady -and $recipientReady)
+  if (-not $completed) {
+    Add-Blocker -Kind "ack_return" -Id $ack.work_order_id -Severity "P0" -Blocker "签收回收未完成" -Evidence "acknowledged=$($ack.acknowledged); ack_date=$($ack.ack_date); recipient=$($ack.recipient)"
+  }
+  $validationRows.Add([pscustomobject][ordered]@{
+    kind = "ack_return"
+    review_id = $ack.work_order_id
+    asset_id = ""
+    reviewer_role = $ack.recipient_role
+    reviewer = $ack.recipient
+    review_result = if ($acknowledged) { "ACKNOWLEDGED" } else { "PENDING" }
+    in_register = $true
+    result_allowed = $true
+    reviewer_ready = $recipientReady
+    date_ready = $dateReady
+    evidence_ready = $true
+    completed = $completed
+    merge_action = if ($completed) { "READY_FOR_PROGRESS_GATE" } else { "HOLD" }
+  }) | Out-Null
+}
+
+$validationRows | Export-Csv -LiteralPath $validationBoardCsv -NoTypeInformation -Encoding UTF8
+$blockerRows | Export-Csv -LiteralPath $blockersCsv -NoTypeInformation -Encoding UTF8
+$diffRows | Export-Csv -LiteralPath $diffPreviewCsv -NoTypeInformation -Encoding UTF8
+$mergeRows | Export-Csv -LiteralPath $mergePlanCsv -NoTypeInformation -Encoding UTF8
+
+$completedReviewReturns = @($validationRows | Where-Object { $_.kind -eq "review_return" -and $_.completed }).Count
+$pendingReviewReturns = @($validationRows | Where-Object { $_.kind -eq "review_return" -and -not $_.completed }).Count
+$completedAckReturns = @($validationRows | Where-Object { $_.kind -eq "ack_return" -and $_.completed }).Count
+$pendingAckReturns = @($validationRows | Where-Object { $_.kind -eq "ack_return" -and -not $_.completed }).Count
+$mergeReadyRows = @($mergeRows | Where-Object { $_.merge_action -eq "READY_FOR_DRY_RUN_APPLY" }).Count
+
+if ($sourceRows.Count -eq 3 -and @($sourceRows | Where-Object { $_.status -eq "ready" }).Count -eq 3) {
+  Add-Check -Key "return_files" -Label "回收文件结构" -Status "pass" -Detail "回收文件结构齐套"
+} else {
+  Add-Check -Key "return_files" -Label "回收文件结构" -Status "fail" -Detail "回收文件结构缺失或字段不完整"
+}
+
+if ($validationRows.Count -gt 0) {
+  Add-Check -Key "validation_board" -Label "回收预检看板" -Status "pass" -Detail "已生成 $($validationRows.Count) 条回收预检记录"
+} else {
+  Add-Check -Key "validation_board" -Label "回收预检看板" -Status "fail" -Detail "未生成回收预检记录"
+}
+
+if ($completedReviewReturns -gt 0 -and $pendingReviewReturns -eq 0 -and $pendingAckReturns -eq 0) {
+  Add-Check -Key "return_completion" -Label "真实回收结果齐套" -Status "pass" -Detail "复核与签收回收结果均已齐套"
+} else {
+  Add-Check -Key "return_completion" -Label "真实回收结果齐套" -Status "blocked" -Detail "completed_reviews=$completedReviewReturns; pending_reviews=$pendingReviewReturns; completed_ack=$completedAckReturns; pending_ack=$pendingAckReturns"
+}
+
+if ($blockerRows.Count -eq 0) {
+  Add-Check -Key "return_blockers" -Label "回收预检阻塞项" -Status "pass" -Detail "无回收预检阻塞项"
+} else {
+  Add-Check -Key "return_blockers" -Label "回收预检阻塞项" -Status "blocked" -Detail "回收预检阻塞项=$($blockerRows.Count)"
+}
+
+$failedRequired = @($checks | Where-Object { $_.required -and $_.status -eq "fail" }).Count
+$blockedRequired = @($checks | Where-Object { $_.required -and $_.status -eq "blocked" }).Count
+$warnings = @($checks | Where-Object { $_.status -eq "warn" }).Count
+
+$overallStatus = if ($failedRequired -gt 0) {
+  "FAIL"
+} elseif ($blockedRequired -gt 0) {
+  "BLOCKED"
+} elseif ($warnings -gt 0) {
+  "WARN"
+} else {
+  "PASS"
+}
+
+$metrics = [ordered]@{
+  legal_return_rows = @($validationRows | Where-Object { $_.kind -eq "review_return" -and $_.reviewer_role -eq "法务" }).Count
+  business_return_rows = @($validationRows | Where-Object { $_.kind -eq "review_return" -and $_.reviewer_role -eq "业务" }).Count
+  ack_return_rows = @($validationRows | Where-Object { $_.kind -eq "ack_return" }).Count
+  validation_rows = $validationRows.Count
+  completed_review_returns = $completedReviewReturns
+  pending_review_returns = $pendingReviewReturns
+  completed_ack_returns = $completedAckReturns
+  pending_ack_returns = $pendingAckReturns
+  merge_ready_rows = $mergeReadyRows
+  blocker_count = $blockerRows.Count
+}
+
+$summary = [ordered]@{
+  name = "phase13-review-return-preflight"
+  status = $overallStatus
+  generated_at = (Get-Date).ToUniversalTime().ToString("o")
+  branch = $branch
+  commit = $commit
+  remote = $remoteUrl
+  return_root = $ReturnRoot
+  review_register_path = $ReviewRegisterPath
+  checks = $checks.ToArray()
+  metrics = $metrics
+  artifacts = [ordered]@{
+    summary_json = $summaryJson
+    summary_md = $summaryMd
+    source_manifest = $sourceManifestCsv
+    validation_board = $validationBoardCsv
+    blockers = $blockersCsv
+    diff_preview = $diffPreviewCsv
+    merge_plan = $mergePlanCsv
+    git_status = $gitStatusPath
+  }
+  totals = [ordered]@{
+    total_checks = $checks.Count
+    failed_required = $failedRequired
+    blocked_required = $blockedRequired
+    warnings = $warnings
+  }
+}
+Save-Json -Path $summaryJson -Value $summary
+
+$md = New-Object System.Collections.Generic.List[string]
+$md.Add("# 阶段 13 回收结果预检与合并计划门禁") | Out-Null
+$md.Add("") | Out-Null
+$md.Add("- 门禁状态：$(Convert-OverallStatusText -Status $overallStatus)（$overallStatus）") | Out-Null
+$md.Add("- 生成时间：$($summary.generated_at)") | Out-Null
+$md.Add("- 分支：$branch") | Out-Null
+$md.Add("- 提交：$commit") | Out-Null
+$md.Add("- 回收目录：$ReturnRoot") | Out-Null
+$md.Add("- 产物目录：$artifactDir") | Out-Null
+$md.Add("") | Out-Null
+$md.Add("## 统计") | Out-Null
+$md.Add("") | Out-Null
+$md.Add("| 指标 | 数量 |") | Out-Null
+$md.Add("|---|---:|") | Out-Null
+$md.Add("| 法务回收记录 | $($metrics.legal_return_rows) |") | Out-Null
+$md.Add("| 业务回收记录 | $($metrics.business_return_rows) |") | Out-Null
+$md.Add("| 签收回收记录 | $($metrics.ack_return_rows) |") | Out-Null
+$md.Add("| 预检记录 | $($metrics.validation_rows) |") | Out-Null
+$md.Add("| 已完成复核回收 | $($metrics.completed_review_returns) |") | Out-Null
+$md.Add("| 待完成复核回收 | $($metrics.pending_review_returns) |") | Out-Null
+$md.Add("| 待完成签收回收 | $($metrics.pending_ack_returns) |") | Out-Null
+$md.Add("| 可进入 DryRun 回填 | $($metrics.merge_ready_rows) |") | Out-Null
+$md.Add("| 阻塞项 | $($metrics.blocker_count) |") | Out-Null
+$md.Add("") | Out-Null
+$md.Add("## 检查项") | Out-Null
+$md.Add("") | Out-Null
+$md.Add("| 检查项 | 必需 | 状态 | 说明 |") | Out-Null
+$md.Add("|---|---:|---|---|") | Out-Null
+foreach ($check in $checks) {
+  $requiredText = if ($check.required) { "是" } else { "否" }
+  $md.Add("| $($check.label) | $requiredText | $(Convert-CheckStatusText -Status $check.status) | $($check.detail) |") | Out-Null
+}
+$md.Add("") | Out-Null
+$md.Add("## 当前结论") | Out-Null
+$md.Add("") | Out-Null
+if ($overallStatus -eq "BLOCKED") {
+  $md.Add("回收预检和合并计划已生成，但当前回收模板仍为 PENDING，不能进入真实回填。") | Out-Null
+} elseif ($overallStatus -eq "PASS") {
+  $md.Add("回收结果已通过预检，可进入 DryRun 回填校验。") | Out-Null
+} else {
+  $md.Add("回收预检未完全通过，请查看阻塞项和合并计划。") | Out-Null
+}
+$md | Set-Content -Encoding UTF8 -Path $summaryMd
+
+Write-Host "PHASE13_REVIEW_RETURN_PREFLIGHT_$overallStatus $artifactDir"
+if ($overallStatus -eq "FAIL") {
+  throw "阶段 13 回收结果预检门禁未通过。查看：$summaryMd"
+}
+if ($overallStatus -eq "BLOCKED" -and $FailOnBlocked) {
+  throw "阶段 13 回收结果预检门禁被阻塞。查看：$summaryMd"
+}