diff --git a/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.i18n.yaml b/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.i18n.yaml
index 525c192406..68f963f3ea 100644
--- a/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.i18n.yaml
+++ b/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.md
-2026-07-29-pnpm-setup-runner-isolation.md: c7c076f34dcd4b905a6bb54411538d6cf61bc1d0
-2026-07-29-pnpm-setup-runner-isolation.zh.md: 2dd866404a5a799fe33e8b9c70c17787dfed0c2a
+2026-07-29-pnpm-setup-runner-isolation.md: 14a609c56eb45f706c7451d2659ab397c2886411
+2026-07-29-pnpm-setup-runner-isolation.zh.md: cdb13f9cfb7e2abf7d1563c39526ea2d9e1ca562
diff --git a/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.md b/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.md
index c7c076f34d..14a609c56e 100644
--- a/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.md
+++ b/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.md
@@ -10,7 +10,7 @@ English | [中文](2026-07-29-pnpm-setup-runner-isolation.zh.md)
 
 ## Decision
 
-Every `pnpm/action-setup` step in [the primary CI workflow](../../../../.github/workflows/ci.yml) and [the master workflow](../../../../.github/workflows/ci-master.yml) sets `dest: ${{ runner.temp }}/setup-pnpm`. Each runner service owns its temporary directory, so one setup cannot replace another runner's install directory. Persistent store reuse remains separate through `PNPM_CONFIG_STORE_DIR`, as established by the [pnpm provisioning decision](../process/2026-07-26-pnpm-action-setup-for-symmetric-ci-caching.md).
+Every non-Windows `pnpm/action-setup` step in [the primary CI workflow](../../../../.github/workflows/ci.yml) and [the master workflow](../../../../.github/workflows/ci-master.yml) sets `dest: ${{ runner.temp }}/setup-pnpm`. Each runner service owns its temporary directory, so one setup cannot replace another runner's install directory. The Windows native jobs use a separate pnpm executable under `setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}` (not `standalone: true`; the destination keeps that executable apart): the run/attempt/job suffix gives every job a fresh directory even when sequential jobs land on the same self-hosted runner and a previous job leaves a locked @reflink native module. Persistent store reuse remains separate through `PNPM_CONFIG_STORE_DIR`, as established by the [pnpm provisioning decision](../process/2026-07-26-pnpm-action-setup-for-symmetric-ci-caching.md).
 
 [The workflow regression test](../../../../scripts/ci-workflow.spec.ts) discovers every `pnpm/action-setup` step in `ci.yml` and `ci-master.yml` and rejects one without the runner-private destination. This keeps newly added jobs inside the same isolation boundary.
 
diff --git a/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.zh.md b/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.zh.md
index 2dd866404a..cdb13f9cfb 100644
--- a/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.zh.md
+++ b/.agents/notes/implemented/bug-fix/2026-07-29-pnpm-setup-runner-isolation.zh.md
@@ -10,7 +10,7 @@ Status: implemented
 
 ## 决策
 
-[主 CI 工作流](../../../../.github/workflows/ci.yml)与 [CI master 工作流](../../../../.github/workflows/ci-master.yml)中的每个 `pnpm/action-setup` 步骤都设置 `dest: ${{ runner.temp }}/setup-pnpm`。每个 runner 服务独占自己的临时目录，因此一个设置过程无法替换另一个 runner 的安装目录。持久 store 的复用仍由 `PNPM_CONFIG_STORE_DIR` 独立处理，遵循 [pnpm 配置决策](../process/2026-07-26-pnpm-action-setup-for-symmetric-ci-caching.zh.md)。
+[主 CI 工作流](../../../../.github/workflows/ci.yml)与 [CI master 工作流](../../../../.github/workflows/ci-master.yml)中的每个**非 Windows** `pnpm/action-setup` 步骤都设置 `dest: ${{ runner.temp }}/setup-pnpm`。每个 runner 服务独占自己的临时目录，因此一个设置过程无法替换另一个 runner 的安装目录。Windows 原生作业在 `setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}` 下使用独立的 pnpm 可执行文件（非 `standalone: true`，目录本身起分离作用）：run/attempt/job 后缀让每次作业都使用全新目录，即使顺序作业落到同一自托管 runner、且前一作业留下被锁定的 @reflink 原生模块。持久 store 的复用仍由 `PNPM_CONFIG_STORE_DIR` 独立处理，遵循 [pnpm 配置决策](../process/2026-07-26-pnpm-action-setup-for-symmetric-ci-caching.zh.md)。
 
 [工作流回归测试](../../../../scripts/ci-workflow.spec.ts)会找出 `ci.yml` 与 `ci-master.yml` 中的每个 `pnpm/action-setup` 步骤，并拒绝缺少 runner 专属目标目录的步骤。这可确保后续新增的作业也处于同一隔离边界内。
 
diff --git a/.github/workflows/build-exe-for-python-sdk.yml b/.github/workflows/build-exe-for-python-sdk.yml
index 0a3dc200f2..0cb0c1789e 100644
--- a/.github/workflows/build-exe-for-python-sdk.yml
+++ b/.github/workflows/build-exe-for-python-sdk.yml
@@ -161,7 +161,7 @@ jobs:
 
       - uses: pnpm/action-setup@v4
         with:
-          dest: ${{ runner.temp }}/setup-pnpm-js
+          dest: ${{ runner.temp }}/setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}
 
       - name: Enable Windows Developer Mode (symlink support)
         if: runner.os == 'Windows'
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 20fa5fc99c..74d4955fa5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -430,7 +430,7 @@ jobs:
         run: if (Test-Path "$env:RUNNER_TEMP/setup-pnpm-js") { Remove-Item -Recurse -Force "$env:RUNNER_TEMP/setup-pnpm-js" -ErrorAction SilentlyContinue }
       - uses: pnpm/action-setup@v4
         with:
-          dest: ${{ runner.temp }}/setup-pnpm-js
+          dest: ${{ runner.temp }}/setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ env.PRIMARY_NODE_VERSION }}
@@ -470,7 +470,7 @@ jobs:
         run: if (Test-Path "$env:RUNNER_TEMP/setup-pnpm-js") { Remove-Item -Recurse -Force "$env:RUNNER_TEMP/setup-pnpm-js" -ErrorAction SilentlyContinue }
       - uses: pnpm/action-setup@v4
         with:
-          dest: ${{ runner.temp }}/setup-pnpm-js
+          dest: ${{ runner.temp }}/setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ env.PRIMARY_NODE_VERSION }}
@@ -508,7 +508,7 @@ jobs:
         run: if (Test-Path "$env:RUNNER_TEMP/setup-pnpm-js") { Remove-Item -Recurse -Force "$env:RUNNER_TEMP/setup-pnpm-js" -ErrorAction SilentlyContinue }
       - uses: pnpm/action-setup@v4
         with:
-          dest: ${{ runner.temp }}/setup-pnpm-js
+          dest: ${{ runner.temp }}/setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ env.PRIMARY_NODE_VERSION }}
@@ -554,7 +554,7 @@ jobs:
         run: if (Test-Path "$env:RUNNER_TEMP/setup-pnpm-js") { Remove-Item -Recurse -Force "$env:RUNNER_TEMP/setup-pnpm-js" -ErrorAction SilentlyContinue }
       - uses: pnpm/action-setup@v4
         with:
-          dest: ${{ runner.temp }}/setup-pnpm-js
+          dest: ${{ runner.temp }}/setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ env.PRIMARY_NODE_VERSION }}
diff --git a/scripts/ci-workflow.spec.ts b/scripts/ci-workflow.spec.ts
index 40a665d667..7c0b762bdc 100644
--- a/scripts/ci-workflow.spec.ts
+++ b/scripts/ci-workflow.spec.ts
@@ -5,7 +5,7 @@ import { describe, expect, it } from 'vitest'
 
 const root = resolve(import.meta.dirname, '..')
 const runnerPrivatePnpmDestination = '${{ runner.temp }}/setup-pnpm'
-const nativeWindowsPnpmDestination = '${{ runner.temp }}/setup-pnpm-js'
+const nativeWindowsPnpmDestination = '${{ runner.temp }}/setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}'
 
 describe('CI workflow', () => {
   it('isolates every pnpm action setup destination per runner', () => {
@@ -36,6 +36,25 @@ describe('CI workflow', () => {
     }
   })
 
+  it('isolates the python SDK exe pnpm setup destination per job', () => {
+    const workflow: unknown = yaml.load(readFileSync(resolve(root, '.github/workflows/build-exe-for-python-sdk.yml'), 'utf8'))
+    if (!isRecord(workflow) || !isRecord(workflow.jobs)) throw new TypeError('build-exe-for-python-sdk.yml must define jobs')
+    const setups: Array<{ step: unknown }> = []
+    for (const job of Object.values(workflow.jobs)) {
+      if (!isRecord(job) || !Array.isArray(job.steps)) continue
+      for (const step of job.steps) {
+        if (!isRecord(step) || typeof step.uses !== 'string' || !step.uses.startsWith('pnpm/action-setup@')) continue
+        setups.push({ step })
+      }
+    }
+    expect(setups.length).toBeGreaterThan(0)
+    for (const { step } of setups) {
+      expect(step).toMatchObject({
+        with: { dest: nativeWindowsPnpmDestination },
+      })
+    }
+  })
+
   it('keeps required Wine and split native Windows jobs with failover, plus a master-only standby', () => {
     const workflow = loadWorkflow('.github/workflows/ci.yml')
     const masterWorkflow = loadWorkflow('.github/workflows/ci-master.yml')