diff --git a/apps/desktop/README.i18n.yaml b/apps/desktop/README.i18n.yaml
index 9f5abdfcab..9130324177 100644
--- a/apps/desktop/README.i18n.yaml
+++ b/apps/desktop/README.i18n.yaml
@@ -30,8 +30,8 @@
   en: 84a9cc7ca9455aa8
   zh: 4091b8aa8231b74a
 /deepseek-harness-desktop/develop:
-  en: a468943c4ea8a919
-  zh: 3f484eef0fdcd283
+  en: fe6d23e6a3d3bc66
+  zh: d60c8d3a55747916
 /deepseek-harness-desktop/develop/startup-onboarding:
   en: a51346b8d880ddba
   zh: 7913214c1c66063c
diff --git a/apps/desktop/README.md b/apps/desktop/README.md
index 8f69de5a04..57db5e6bfb 100644
--- a/apps/desktop/README.md
+++ b/apps/desktop/README.md
@@ -160,7 +160,7 @@ The Web counterparts are `pnpm run dev:web` and `pnpm run start:web`, documented
 
 The [native/renderer keyboard tests](tests/keyboard.spec.ts) compile as part of the repository Client typecheck. Their Desktop imports are limited to Cordis-free input, persistence, IPC, browser-guest, and overlay modules.
 
-Before running the [Windows console-signal tests](tests/windows-cli-signals.spec.ts) directly, prepare the locked Electron binary with `pnpm --filter @deepseek-ai/dsh-desktop exec install-electron` from the repository root. For downloads through a proxy, enable `ELECTRON_GET_USE_PROXY=1` for that installer process. Windows coverage aggregates require successful provisioning before the instrumented unit inventory starts.
+Dependency installation does not run the locked Electron package's separate binary installer. Before running the [Windows console-signal tests](tests/windows-cli-signals.spec.ts) directly, prepare the locked Electron binary with `pnpm --filter @deepseek-ai/dsh-desktop exec install-electron` from the repository root. For downloads through a proxy, enable `ELECTRON_GET_USE_PROXY=1` for that installer process. Windows coverage aggregates require successful provisioning before the instrumented unit inventory starts.
 
 ### Startup onboarding
 
diff --git a/apps/desktop/README.zh.md b/apps/desktop/README.zh.md
index 40b4c9c711..03ce092267 100644
--- a/apps/desktop/README.zh.md
+++ b/apps/desktop/README.zh.md
@@ -162,7 +162,7 @@ Web 侧的对应命令是 `pnpm run dev:web` 与 `pnpm run start:web`，见[开
 
 [原生输入与渲染进程键盘测试](tests/keyboard.spec.ts)直接纳入仓库 Client 类型检查。它只导入不依赖 Cordis 的 Desktop 输入、持久化、IPC、浏览器 guest 和蒙层模块。
 
-直接运行 [Windows 控制台信号测试](tests/windows-cli-signals.spec.ts)前，在仓库根目录执行 `pnpm --filter @deepseek-ai/dsh-desktop exec install-electron`，准备锁定版本的 Electron 二进制。通过代理下载时，为该安装进程启用 `ELECTRON_GET_USE_PROXY=1`。Windows 覆盖率检查要求安装成功后，才启动带覆盖率插桩的单元测试集。
+安装工作区依赖不会自动运行锁定版本 Electron 提供的独立二进制安装程序。直接运行 [Windows 控制台信号测试](tests/windows-cli-signals.spec.ts)前，在仓库根目录执行 `pnpm --filter @deepseek-ai/dsh-desktop exec install-electron`，准备锁定版本的 Electron 二进制。通过代理下载时，为该安装进程启用 `ELECTRON_GET_USE_PROXY=1`。Windows 覆盖率检查要求安装成功后，才启动带覆盖率插桩的单元测试集。
 
 ### 启动引导
 
diff --git a/scripts/run-gates.spec.ts b/scripts/run-gates.spec.ts
index 2831474532..1c4476825f 100644
--- a/scripts/run-gates.spec.ts
+++ b/scripts/run-gates.spec.ts
@@ -149,6 +149,7 @@ function withEnv<T>(name: string, value: string | undefined, action: () => T): T
   }
 }
 
+// Mutates worker-global state: only use for synchronous, non-concurrent graph inspection.
 function withPlatform<T>(platform: NodeJS.Platform, action: () => T): T {
   const original = Object.getOwnPropertyDescriptor(process, 'platform')!
   Object.defineProperty(process, 'platform', { ...original, value: platform })
@@ -547,6 +548,7 @@ describe('gate graph validation', () => {
     const installers = gates.filter(gate => gate.id === 'electron-install')
     expect(installers).toHaveLength(1)
     expect(installers[0]?.allowFailure).not.toBe(true)
+    expect(installers[0]?.needs ?? []).not.toContain('build')
     expect(gates.find(gate => gate.id === 'coverage')?.needs).toContain('electron-install')
     let installed = false
     await runGates(gates, 8, async (subject) => {
@@ -592,12 +594,12 @@ describe('gate graph validation', () => {
     },
   )
 
-  it.each(['ci-primary', 'ci-linux-primary', 'ci-coverage', 'ci-artifacts', 'ci-windows-blocking'] as const)(
+  it.each(['ci-coverage', 'ci-artifacts', 'ci-windows-blocking'] as const)(
     'only provisions Electron for native Windows coverage in %s', (mode) => {
       const original = Object.getOwnPropertyDescriptor(process, 'platform')
       for (const platform of ['linux', 'darwin', 'win32'] as const) {
         const gates = withPlatform(platform, () => withPnpmEntrypoint(() => gatesForMode(mode)))
-        const needed = platform === 'win32' && ['ci-primary', 'ci-linux-primary', 'ci-coverage'].includes(mode)
+        const needed = platform === 'win32' && mode === 'ci-coverage'
         expect(gates.filter(gate => gate.id === 'electron-install')).toHaveLength(needed ? 1 : 0)
         if (needed) {
           expect(gates.find(gate => gate.id === 'coverage')?.needs).toContain('electron-install')
@@ -609,9 +611,11 @@ describe('gate graph validation', () => {
     },
   )
 
-  it('restores the platform descriptor after failed graph inspection', () => {
+  it('restores the platform descriptor when coverage configuration is rejected', () => {
     const original = Object.getOwnPropertyDescriptor(process, 'platform')
-    expect(() => withPlatform('win32', () => { throw new Error('inspection failed') })).toThrow('inspection failed')
+    expect(() => withEnv('DSH_COVERAGE_PARTITIONS', '1', () =>
+      withPlatform('win32', () => withPnpmEntrypoint(() => gatesForMode('ci-coverage')))))
+      .toThrow('DSH_COVERAGE_PARTITIONS must be an integer greater than 1')
     expect(Object.getOwnPropertyDescriptor(process, 'platform')).toEqual(original)
   })
 
diff --git a/scripts/run-gates.ts b/scripts/run-gates.ts
index 1597aeb618..8d5ae19a62 100644
--- a/scripts/run-gates.ts
+++ b/scripts/run-gates.ts
@@ -582,10 +582,10 @@ function ciWindowsBlockingGates(): Gate[] {
 }
 
 function ciWindowsCompleteGates(): Gate[] {
-  const coverage = coverageGates('win32').map(gate => ({
+  const coverage = coverageGates('win32').map(gate => gate.id === 'electron-install' ? gate : {
     ...gate,
     needs: [...new Set(['build', ...(gate.needs ?? [])])],
-  }))
+  })
   const coverageAfter = coverage.map(gate => gate.id)
   const observational = ciWindowsObservationalGates()
     // Coverage owns Electron preparation. The required production site replaces