diff --git a/plugins/system-diagnostic-report/CHANGELOG.md b/plugins/system-diagnostic-report/CHANGELOG.md
new file mode 100644
index 000000000..e8a9223e7
--- /dev/null
+++ b/plugins/system-diagnostic-report/CHANGELOG.md
@@ -0,0 +1,11 @@
+# 更新日志
+
+## 0.1.1 - 2026-09-01
+
+- 适配 ZTools 3.2：导出后的 Markdown 和 JSON 可直接拖到外部应用。
+- 兼容 ZTools 2.4–3.1：保留采集、复制、保存和打开文件夹流程。
+- 新增 2.4.0 宿主版本门禁；低版本或真实宿主版本不可识别时仅显示升级提示，不启动采集或后台任务。
+
+## 0.1.0
+
+- 首次发布本地系统与硬件信息采集、脱敏展示及诊断报告导出能力。
diff --git a/plugins/system-diagnostic-report/README.md b/plugins/system-diagnostic-report/README.md
index 61ada2ff8..1a17fc991 100644
--- a/plugins/system-diagnostic-report/README.md
+++ b/plugins/system-diagnostic-report/README.md
@@ -1,5 +1,11 @@
 # 系统诊断报告
 
+## ZTools 兼容性
+
+- ZTools 3.2：导出后的 Markdown/JSON 可使用 `startDrag` 拖到外部应用；ESC 隐藏期间采集会在 Preload 安全完成，重新进入不会重复启动采集。
+- ZTools 2.4–3.1：保留采集、复制、保存和文件夹工作流；缺少 `startDrag` 时不会显示拖出入口。
+- 低于 2.4：插件只显示升级提示，不启动采集或后台任务。
+
 一个面向 ZTools 的本地系统信息查看与诊断报告生成工具。它把排障时常用的软硬件信息集中到一处，并提供适合复制或保存的报告，减少在不同系统设置与命令行工具之间来回查找的成本。
 
 ![系统诊断报告界面](screenshots/main.png)
diff --git a/plugins/system-diagnostic-report/package.json b/plugins/system-diagnostic-report/package.json
index 3589541a7..a75e90087 100644
--- a/plugins/system-diagnostic-report/package.json
+++ b/plugins/system-diagnostic-report/package.json
@@ -1,6 +1,6 @@
 {
   "name": "system-diagnostic-report",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "private": true,
   "type": "module",
   "description": "本地生成软硬件系统信息与脱敏诊断报告的 ZTools 插件。",
diff --git a/plugins/system-diagnostic-report/public/plugin.json b/plugins/system-diagnostic-report/public/plugin.json
index 59728feeb..ccc5d6b77 100644
--- a/plugins/system-diagnostic-report/public/plugin.json
+++ b/plugins/system-diagnostic-report/public/plugin.json
@@ -3,7 +3,7 @@
   "name": "system-diagnostic-report",
   "title": "系统诊断报告",
   "description": "在本地采集系统与硬件摘要，生成便于排障和分享的诊断报告。",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "main": "index.html",
   "preload": "preload/services.js",
   "logo": "logo.svg",
diff --git a/plugins/system-diagnostic-report/public/preload/host-compatibility.cjs b/plugins/system-diagnostic-report/public/preload/host-compatibility.cjs
new file mode 100644
index 000000000..9f0b3069d
--- /dev/null
+++ b/plugins/system-diagnostic-report/public/preload/host-compatibility.cjs
@@ -0,0 +1,31 @@
+'use strict'
+
+const MINIMUM_VERSION = Object.freeze([2, 4, 0])
+
+function parseVersion(value) {
+  if (typeof value !== 'string') return null
+  const match = value.trim().match(/^[vV]?(\d+)\.(\d+)(?:\.(\d+))?(?:-[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*)?(?:\+[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*)?$/)
+  if (!match) return null
+  const parts = [Number(match[1]), Number(match[2]), Number(match[3] || 0)]
+  return parts.every(Number.isSafeInteger) ? parts : null
+}
+
+function getHostCompatibility(hostWindow) {
+  const api = hostWindow?.ztools
+  if (!api) return Object.freeze({ supported: true, detected: false, version: null })
+  if (typeof api.getAppVersion !== 'function') {
+    return Object.freeze({ supported: false, detected: true, version: null })
+  }
+  let version
+  try { version = api.getAppVersion() } catch {
+    return Object.freeze({ supported: false, detected: true, version: null })
+  }
+  const parsed = parseVersion(version)
+  if (!parsed) return Object.freeze({ supported: false, detected: true, version: null })
+  const difference = parsed.findIndex((part, index) => part !== MINIMUM_VERSION[index])
+  const minimumPrerelease = difference === -1 && /^[vV]?\d+\.\d+(?:\.\d+)?-/.test(String(version).trim())
+  const supported = !minimumPrerelease && (difference === -1 || parsed[difference] > MINIMUM_VERSION[difference])
+  return Object.freeze({ supported, detected: true, version: `${parsed[0]}.${parsed[1]}.${parsed[2]}` })
+}
+
+module.exports = Object.freeze({ MINIMUM_VERSION, getHostCompatibility, parseVersion })
diff --git a/plugins/system-diagnostic-report/public/preload/package.json b/plugins/system-diagnostic-report/public/preload/package.json
index 696796c7c..de2f10666 100644
--- a/plugins/system-diagnostic-report/public/preload/package.json
+++ b/plugins/system-diagnostic-report/public/preload/package.json
@@ -1,6 +1,6 @@
 {
   "name": "system-diagnostic-report-preload",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "private": true,
   "type": "commonjs",
   "main": "services.js",
diff --git a/plugins/system-diagnostic-report/public/preload/services.js b/plugins/system-diagnostic-report/public/preload/services.js
index 4c4502c72..64bdee043 100644
--- a/plugins/system-diagnostic-report/public/preload/services.js
+++ b/plugins/system-diagnostic-report/public/preload/services.js
@@ -2,12 +2,21 @@
 
 const fs = require('node:fs/promises')
 const path = require('node:path')
-const nodeOs = require('node:os')
-const systeminformation = require('systeminformation')
-const { collectSystemReport } = require('./collectors/core.cjs')
+const { getHostCompatibility } = require('./host-compatibility.cjs')
+
+const compatibility = getHostCompatibility(typeof window === 'undefined' ? undefined : window)
+// systeminformation and the collector graph may spawn probes. Do not even
+// require them until a real host has positively identified itself as 2.4+.
+const nodeOs = compatibility.supported ? require('node:os') : null
+const systeminformation = compatibility.supported ? require('systeminformation') : null
+const collectSystemReport = compatibility.supported
+  ? require('./collectors/core.cjs').collectSystemReport
+  : null
 
 const MAX_REPORT_BYTES = 20 * 1024 * 1024
+const DRAG_GRANT_TTL_MS = 5 * 60 * 1000
 const collectionFlights = new Map()
+const dragGrants = new Map()
 
 function hostApi() {
   return window && window.ztools ? window.ztools : null
@@ -35,6 +44,9 @@ function getDisplays() {
 }
 
 function collect(options = {}) {
+  if (!compatibility.supported || !collectSystemReport) {
+    return Promise.reject(new Error('ZTools 2.4.0 or newer is required'))
+  }
   const privacy = options && options.privacy === 'fingerprint-minimal'
     ? 'fingerprint-minimal'
     : 'safe'
@@ -59,6 +71,7 @@ function collect(options = {}) {
 }
 
 async function copyText(text) {
+  if (!compatibility.supported) return false
   if (typeof text !== 'string') return false
   const api = hostApi()
   if (!api || typeof api.copyText !== 'function') return false
@@ -79,6 +92,7 @@ function safeDefaultName(value, format) {
 }
 
 async function saveReport(options = {}) {
+  if (!compatibility.supported) throw new Error('ZTools 2.4.0 or newer is required')
   const format = options.format === 'json' ? 'json' : options.format === 'markdown' ? 'markdown' : null
   if (!format) throw new TypeError('Unsupported report format')
   if (typeof options.content !== 'string') throw new TypeError('Report content must be text')
@@ -108,11 +122,37 @@ async function saveReport(options = {}) {
 
   if (!filePath) return { canceled: true }
   await fs.writeFile(filePath, options.content, { encoding: 'utf8' })
+  const realPath = await fs.realpath(filePath)
+  dragGrants.clear()
+  dragGrants.set(realPath, Date.now() + DRAG_GRANT_TTL_MS)
   return { canceled: false, filePath }
 }
 
+async function startDrag(filePath) {
+  if (!compatibility.supported) return false
+  if (typeof filePath !== 'string' || !path.isAbsolute(filePath)) return false
+  const api = hostApi()
+  if (!api || typeof api.startDrag !== 'function') return false
+  try {
+    const realPath = await fs.realpath(filePath)
+    const expiresAt = dragGrants.get(realPath)
+    if (!expiresAt || expiresAt < Date.now()) {
+      dragGrants.delete(realPath)
+      return false
+    }
+    const stat = await fs.stat(realPath)
+    if (!stat.isFile()) return false
+    dragGrants.delete(realPath)
+    api.startDrag(realPath)
+    return true
+  } catch {
+    return false
+  }
+}
+
 window.systemReport = Object.freeze({
   collect,
   copyText,
-  saveReport
+  saveReport,
+  startDrag
 })
diff --git a/plugins/system-diagnostic-report/src/App.vue b/plugins/system-diagnostic-report/src/App.vue
index 9cc4953c5..3beb8736a 100644
--- a/plugins/system-diagnostic-report/src/App.vue
+++ b/plugins/system-diagnostic-report/src/App.vue
@@ -18,12 +18,16 @@ import { computed, nextTick, onBeforeUnmount, onMounted, ref } from 'vue'
 import StatusMark from './components/StatusMark.vue'
 import { formatReportDate, reportToJson, reportToMarkdown } from './composables/formatReport'
 import { useSystemReport } from './composables/useSystemReport'
+import { hostCompatibility } from './composables/ztoolsCompatibility'
 import type { DiagnosticStatus } from './types/report'
 
 type Theme = 'light' | 'dark'
 type ExportFormat = 'markdown' | 'json'
 
+const compatibility = ref(hostCompatibility())
 const { report, loading, error, stale, usedMock, collect } = useSystemReport()
+const lastExportPath = ref('')
+const canStartDrag = computed(() => typeof window.ztools?.startDrag === 'function')
 const activeGroup = ref('overview')
 const theme = ref<Theme>('light')
 const announcement = ref('')
@@ -119,6 +123,7 @@ async function exportAs(format: ExportFormat) {
     if (window.systemReport?.saveReport) {
       const result = await window.systemReport.saveReport({ content, defaultName, format })
       if (result.canceled) return
+      lastExportPath.value = result.filePath || ''
     } else {
       const blob = new Blob([content], { type: format === 'markdown' ? 'text/markdown;charset=utf-8' : 'application/json;charset=utf-8' })
       const url = URL.createObjectURL(blob)
@@ -135,6 +140,17 @@ async function exportAs(format: ExportFormat) {
   }
 }
 
+async function dragLastExport(event: DragEvent) {
+  event.preventDefault()
+  if (!lastExportPath.value || !window.systemReport?.startDrag) return
+  try {
+    const started = await window.systemReport.startDrag(lastExportPath.value)
+    announce(started ? '已开始拖出导出文件' : '当前 ZTools 版本不支持拖出文件')
+  } catch {
+    announce('拖出文件失败，请在文件夹中打开')
+  }
+}
+
 function observeSections() {
   observer.value?.disconnect()
   observer.value = new IntersectionObserver(
@@ -167,7 +183,20 @@ onMounted(async () => {
     // Use the operating-system preference.
   }
   applyTheme(initialTheme)
-  await refresh()
+  if (!compatibility.value.supported) return
+  window.ztools?.onPluginOut?.(() => {
+    // Collection is deliberately allowed to finish in preload. Closing only
+    // transient UI avoids duplicate collectors when 3.2 hides this renderer.
+    exportDialog.value?.close()
+    observer.value?.disconnect()
+    announcement.value = ''
+  })
+  window.ztools?.onPluginEnter?.(() => {
+    if (!compatibility.value.supported) return
+    if (report.value) void nextTick(observeSections)
+    else if (!loading.value) void refresh()
+  })
+  if (compatibility.value.supported) await refresh()
 })
 
 onBeforeUnmount(() => {
@@ -177,6 +206,15 @@ onBeforeUnmount(() => {
 </script>
 
 <template>
+  <section v-if="!compatibility.supported" class="compatibility-gate" role="alert">
+    <span class="compatibility-mark" aria-hidden="true">!</span>
+    <div>
+      <p>需要更新 ZTools</p>
+      <h1>当前版本 {{ compatibility.version || '无法识别' }} 暂不支持此插件</h1>
+      <p>为了获得更完整、稳定的体验，请升级至 ZTools 2.4.0 或更高版本。</p>
+    </div>
+  </section>
+  <template v-else>
   <a class="skip-link" href="#report-content">跳到诊断内容</a>
   <div class="app-frame">
     <header class="topbar">
@@ -206,6 +244,10 @@ onBeforeUnmount(() => {
           <Download :size="15" aria-hidden="true" />
           <span>导出</span>
         </button>
+        <button v-if="lastExportPath && canStartDrag" class="text-button" type="button" draggable="true" title="按住并拖到外部应用" @dragstart="dragLastExport">
+          <Download :size="15" aria-hidden="true" />
+          <span>拖出上次导出</span>
+        </button>
       </div>
     </header>
 
@@ -372,4 +414,5 @@ onBeforeUnmount(() => {
     </div>
     <div class="dialog-safe"><ShieldCheck :size="14" aria-hidden="true" /> 敏感标识仍保持隐藏</div>
   </dialog>
+  </template>
 </template>
diff --git a/plugins/system-diagnostic-report/src/composables/ztoolsCompatibility.ts b/plugins/system-diagnostic-report/src/composables/ztoolsCompatibility.ts
new file mode 100644
index 000000000..437cb69fd
--- /dev/null
+++ b/plugins/system-diagnostic-report/src/composables/ztoolsCompatibility.ts
@@ -0,0 +1,36 @@
+export type ZToolsCompatibility = {
+  supported: boolean
+  detected: boolean
+  version: string | null
+}
+
+const MINIMUM_VERSION = Object.freeze([2, 4, 0])
+
+function parseVersion(value: unknown): number[] | null {
+  if (typeof value !== 'string') return null
+  const match = value.trim().match(/^[vV]?(\d+)\.(\d+)(?:\.(\d+))?(?:-[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*)?(?:\+[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*)?$/)
+  if (!match) return null
+  const parts = [Number(match[1]), Number(match[2]), Number(match[3] || 0)]
+  return parts.every(Number.isSafeInteger) ? parts : null
+}
+
+export function getZToolsCompatibility(value: unknown): ZToolsCompatibility {
+  const parsed = parseVersion(value)
+  if (!parsed) return { supported: false, detected: true, version: null }
+  const difference = parsed.findIndex((part, index) => part !== MINIMUM_VERSION[index])
+  const minimumPrerelease = difference === -1 && /^[vV]?\d+\.\d+(?:\.\d+)?-/.test(String(value).trim())
+  const supported = !minimumPrerelease && (difference === -1 || parsed[difference] > MINIMUM_VERSION[difference])
+  return { supported, detected: true, version: `${parsed[0]}.${parsed[1]}.${parsed[2]}` }
+}
+
+export function hostCompatibility(): ZToolsCompatibility {
+  if (!window.ztools) return { supported: true, detected: false, version: null }
+  if (typeof window.ztools.getAppVersion !== 'function') {
+    return { supported: false, detected: true, version: null }
+  }
+  try {
+    return getZToolsCompatibility(window.ztools.getAppVersion())
+  } catch {
+    return { supported: false, detected: true, version: null }
+  }
+}
diff --git a/plugins/system-diagnostic-report/src/env.d.ts b/plugins/system-diagnostic-report/src/env.d.ts
index b19351640..3148bdddb 100644
--- a/plugins/system-diagnostic-report/src/env.d.ts
+++ b/plugins/system-diagnostic-report/src/env.d.ts
@@ -12,6 +12,7 @@ declare global {
         defaultName: string
         format: 'markdown' | 'json'
       }): Promise<{ canceled: boolean; filePath?: string }>
+      startDrag?(filePath: string): Promise<boolean>
     }
     ztools?: {
       copyText?(text: string): void
@@ -19,6 +20,8 @@ declare global {
       getAppVersion?(): string
       getAllDisplays?(): unknown[]
       onPluginEnter?(callback: (action: unknown) => void): void
+      onPluginOut?(callback: () => void): void
+      startDrag?(files: string | string[]): unknown
     }
   }
 }
diff --git a/plugins/system-diagnostic-report/src/styles.css b/plugins/system-diagnostic-report/src/styles.css
index 1520757c8..dda2743b6 100644
--- a/plugins/system-diagnostic-report/src/styles.css
+++ b/plugins/system-diagnostic-report/src/styles.css
@@ -24,6 +24,21 @@
   --utility: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
 }
 
+.compatibility-gate {
+  min-height: 100vh;
+  display: grid;
+  place-content: center;
+  grid-template-columns: auto minmax(0, 520px);
+  gap: 20px;
+  padding: 36px;
+  color: var(--ink);
+  background: var(--paper);
+}
+
+.compatibility-gate p { margin: 0 0 8px; color: var(--ink-soft); }
+.compatibility-gate h1 { margin: 0 0 12px; font-size: clamp(22px, 4vw, 34px); line-height: 1.25; }
+.compatibility-mark { display: grid; width: 46px; height: 46px; place-items: center; border-radius: 50%; color: white; background: #c2410c; font-size: 28px; font-weight: 700; }
+
 :root[data-theme="dark"] {
   color: #dde4e5;
   background: #151b1e;
diff --git a/plugins/system-diagnostic-report/tests/frontend.test.ts b/plugins/system-diagnostic-report/tests/frontend.test.ts
index 4fcae6cc3..a1b98c687 100644
--- a/plugins/system-diagnostic-report/tests/frontend.test.ts
+++ b/plugins/system-diagnostic-report/tests/frontend.test.ts
@@ -3,6 +3,7 @@ import test from 'node:test'
 
 import { escapeMarkdown, reportToMarkdown } from '../src/composables/formatReport'
 import { normalizeReport, useSystemReport } from '../src/composables/useSystemReport'
+import { getZToolsCompatibility, hostCompatibility } from '../src/composables/ztoolsCompatibility'
 import type { NormalizedReport, SystemReport } from '../src/types/report'
 
 function rawReport(generatedAt = '2026-07-30T10:20:30.000Z'): SystemReport {
@@ -26,6 +27,36 @@ test('normalization uses canonical overview time and keeps false fields neutral'
   assert.equal(virtual?.status, 'neutral')
 })
 
+test('ZTools 2.4 is the supported floor while an unreadable detected version fails closed', () => {
+  assert.equal(getZToolsCompatibility('2.3.9').supported, false)
+  assert.equal(getZToolsCompatibility('2.4.0-beta.1').supported, false)
+  assert.equal(getZToolsCompatibility('2.4.0').supported, true)
+  assert.equal(getZToolsCompatibility('3.1.9').supported, true)
+  assert.equal(getZToolsCompatibility('3.2.0').supported, true)
+  assert.deepEqual(getZToolsCompatibility(undefined), { supported: false, detected: true, version: null })
+  assert.deepEqual(getZToolsCompatibility('current'), { supported: false, detected: true, version: null })
+})
+
+test('host compatibility allows only a bridge-free browser preview to have an unknown version', () => {
+  const previousWindow = globalThis.window
+  try {
+    Object.defineProperty(globalThis, 'window', { configurable: true, writable: true, value: {} })
+    assert.deepEqual(hostCompatibility(), { supported: true, detected: false, version: null })
+    for (const ztools of [
+      {},
+      { getAppVersion() { throw new Error('unavailable') } },
+      { getAppVersion: () => '' },
+      { getAppVersion: () => 'invalid' },
+    ]) {
+      globalThis.window = { ztools } as Window & typeof globalThis
+      assert.deepEqual(hostCompatibility(), { supported: false, detected: true, version: null })
+    }
+  } finally {
+    if (previousWindow === undefined) delete (globalThis as { window?: Window }).window
+    else globalThis.window = previousWindow
+  }
+})
+
 test('collector errors retain their source without being duplicated as warnings', () => {
   const report = normalizeReport({
     ...rawReport(),
diff --git a/plugins/system-diagnostic-report/tests/host-compatibility.test.cjs b/plugins/system-diagnostic-report/tests/host-compatibility.test.cjs
new file mode 100644
index 000000000..b7d830c9c
--- /dev/null
+++ b/plugins/system-diagnostic-report/tests/host-compatibility.test.cjs
@@ -0,0 +1,50 @@
+'use strict'
+
+const assert = require('node:assert/strict')
+const { spawnSync } = require('node:child_process')
+const path = require('node:path')
+const test = require('node:test')
+
+const { getHostCompatibility } = require('../public/preload/host-compatibility.cjs')
+
+test('browser preview is allowed and detected hosts fail closed on unreadable versions', () => {
+  assert.deepEqual(getHostCompatibility({}), { supported: true, detected: false, version: null })
+  for (const api of [
+    {},
+    { getAppVersion() { throw new Error('unavailable') } },
+    { getAppVersion: () => '' },
+    { getAppVersion: () => 'current' },
+    { getAppVersion: () => '3' },
+    { getAppVersion: () => null },
+  ]) {
+    assert.deepEqual(getHostCompatibility({ ztools: api }), { supported: false, detected: true, version: null })
+  }
+})
+
+test('2.4 through 3.1 remain supported while older hosts are gated', () => {
+  assert.equal(getHostCompatibility({ ztools: { getAppVersion: () => '2.3.9' } }).supported, false)
+  assert.equal(getHostCompatibility({ ztools: { getAppVersion: () => '2.4.0-beta.1' } }).supported, false)
+  for (const version of ['2.4.0', '2.8.3', '3.0.0', '3.1.9']) {
+    assert.deepEqual(getHostCompatibility({ ztools: { getAppVersion: () => version } }), {
+      supported: true,
+      detected: true,
+      version,
+    })
+  }
+})
+
+test('unsupported detected hosts do not load systeminformation or collector modules', () => {
+  const child = path.join(__dirname, 'preload-gate-child.cjs')
+  const services = path.join(__dirname, '..', 'public', 'preload', 'services.js')
+  for (const mode of ['missing', 'throwing', 'empty', 'invalid', 'below-floor']) {
+    const result = spawnSync(process.execPath, [child, services, mode], {
+      cwd: path.join(__dirname, '..'),
+      encoding: 'utf8',
+      timeout: 10_000,
+    })
+    assert.equal(result.status, 0, `${mode}: ${result.stderr}`)
+    const state = JSON.parse(result.stdout)
+    assert.deepEqual(state.heavyLoads, [], mode)
+    assert.deepEqual(state.bridgeMethods, ['collect', 'copyText', 'saveReport', 'startDrag'], mode)
+  }
+})
diff --git a/plugins/system-diagnostic-report/tests/manifest.test.cjs b/plugins/system-diagnostic-report/tests/manifest.test.cjs
index e3860269b..adc8332ce 100644
--- a/plugins/system-diagnostic-report/tests/manifest.test.cjs
+++ b/plugins/system-diagnostic-report/tests/manifest.test.cjs
@@ -10,7 +10,7 @@ const manifest = JSON.parse(readFileSync(manifestPath, 'utf8'))
 test('manifest defines the fixed plugin identity and entry points', () => {
   assert.equal(manifest.name, 'system-diagnostic-report')
   assert.equal(manifest.title, '系统诊断报告')
-  assert.equal(manifest.version, '0.1.0')
+  assert.equal(manifest.version, '0.1.1')
   assert.equal(manifest.main, 'index.html')
   assert.equal(manifest.preload, 'preload/services.js')
   assert.equal(manifest.logo, 'logo.svg')
@@ -65,5 +65,5 @@ test('preload exposes only the minimum report bridge', () => {
     .split(',')
     .map((value) => value.trim())
     .filter(Boolean)
-  assert.deepEqual(methods, ['collect', 'copyText', 'saveReport'])
+  assert.deepEqual(methods, ['collect', 'copyText', 'saveReport', 'startDrag'])
 })
diff --git a/plugins/system-diagnostic-report/tests/preload-gate-child.cjs b/plugins/system-diagnostic-report/tests/preload-gate-child.cjs
new file mode 100644
index 000000000..154fe9237
--- /dev/null
+++ b/plugins/system-diagnostic-report/tests/preload-gate-child.cjs
@@ -0,0 +1,28 @@
+'use strict'
+
+const Module = require('node:module')
+const path = require('node:path')
+
+const [servicesPath, mode] = process.argv.slice(2)
+if (!path.isAbsolute(servicesPath)) process.exit(2)
+
+const ztools = {}
+if (mode === 'throwing') ztools.getAppVersion = () => { throw new Error('unavailable') }
+else if (mode === 'empty') ztools.getAppVersion = () => ''
+else if (mode === 'invalid') ztools.getAppVersion = () => 'ZTools current'
+else if (mode === 'below-floor') ztools.getAppVersion = () => '2.3.9'
+
+const heavyLoads = []
+const originalLoad = Module._load
+Module._load = function trackedLoad(request, parent, isMain) {
+  if (request === 'systeminformation' || request === './collectors/core.cjs') heavyLoads.push(request)
+  return originalLoad.call(this, request, parent, isMain)
+}
+
+global.window = { ztools }
+require(servicesPath)
+
+process.stdout.write(JSON.stringify({
+  heavyLoads,
+  bridgeMethods: Object.keys(window.systemReport || {}),
+}))