feat: skip self-update for devEngines.packageManager and add CI tests

pnpm auto-switches to the right version when devEngines.packageManager is set, so self-update is unnecessary. This also enables range support (e.g. ">=9.15.0") which self-update doesn't handle.
feat: read pnpm version from devEngines.packageManager field
2026-05-14 22:33:32 +08:00 · 2026-03-27 11:04:52 +01:00 · 2026-03-27 01:51:01 +01:00
17 changed files with 375 additions and 673 deletions
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1 +0,0 @@
-* @zkochan
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -1,76 +1,39 @@
 name: Test Action

 on:
-  pull_request:
-  push:
-    branches:
-      - master
-  workflow_dispatch:
+  - push
+  - pull_request
+  - workflow_dispatch

 jobs:
-  smoke:
-    # Cross-OS coverage. Exercises the bootstrap install + PATH on each platform,
-    # the version-respects-request regression (#225 / #230 — Windows PATH shadow),
-    # and the bin_dest output regression (#247). Multi-version coverage on Linux
-    # so we don't pay 3x for major-version differences.
-    name: 'Smoke (${{ matrix.name }})'
+  test_default_inputs:
+    name: Test with default inputs

    runs-on: ${{ matrix.os }}

    strategy:
      fail-fast: false
      matrix:
-        include:
-          - name: 'ubuntu / v9.15.5'
-            os: ubuntu-latest
-            version: '9.15.5'
-          - name: 'ubuntu / v10.33.0'
-            os: ubuntu-latest
-            version: '10.33.0'
-          - name: 'ubuntu / v9.15.5 / custom-dest'
-            os: ubuntu-latest
-            version: '9.15.5'
-            dest: '~/test/pnpm'
-          - name: 'macos / v9.15.5'
-            os: macos-latest
-            version: '9.15.5'
-          - name: 'windows / v9.15.5'
-            os: windows-latest
-            version: '9.15.5'
+        pnpm:
+          - 9.15.5
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest

    steps:
      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1

-      - id: pnpm
-        name: Run the action
+      - name: Run the action
        uses: ./
        with:
-          version: ${{ matrix.version }}
-          dest: ${{ matrix.dest || '~/setup-pnpm' }}
+          version: 9.15.5

-      - name: 'Test: pnpm/pnpx on PATH report the requested version (incl. via bin_dest)'
-        # Pass paths via env, not template interpolation, so Windows
-        # backslashes in `bin_dest` aren't eaten by bash's escape handling.
-        env:
-          BIN_DEST: ${{ steps.pnpm.outputs.bin_dest }}
-          REQUIRED: ${{ matrix.version }}
-        run: |
-          set -e
-          which pnpm
-          which pnpx
-          actual="$(pnpm --version)"
-          echo "pnpm --version: ${actual}"
-          if [ "${actual}" != "${REQUIRED}" ]; then
-            echo "Expected pnpm version ${REQUIRED}, but got ${actual}"
-            exit 1
-          fi
-          bin_dest_version="$("$BIN_DEST/pnpm" --version)"
-          echo "bin_dest pnpm --version: ${bin_dest_version}"
-          if [ "${bin_dest_version}" != "${REQUIRED}" ]; then
-            echo "Expected ${REQUIRED} via bin_dest, but got ${bin_dest_version}"
-            exit 1
-          fi
-        shell: bash
+      - name: 'Test: which'
+        run: which pnpm; which pnpx
+
+      - name: 'Test: version'
+        run: pnpm --version

      - name: 'Test: install in a fresh project'
        run: |
@@ -80,95 +43,47 @@ jobs:
          pnpm add is-odd
        shell: bash

-  manifest_pin:
-    # Folds the old test_package_manager_field, test_dev_engines, and
-    # test_dev_engines_on_fail_error jobs. The action's manifest handling is
-    # OS-independent, so ubuntu-only is sufficient.
-    name: 'Manifest pin: ${{ matrix.label }}'
+  test_dest:
+    name: Test with dest

-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}

    strategy:
      fail-fast: false
      matrix:
-        include:
-          - label: 'packageManager pnpm@9.15.5 (#227)'
-            manifest: '{"packageManager":"pnpm@9.15.5"}'
-            version: '9.15.5'
-          - label: 'packageManager pnpm@10.33.0'
-            manifest: '{"packageManager":"pnpm@10.33.0"}'
-            version: '10.33.0'
-          - label: 'devEngines onFail=download, exact'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":"9.15.5","onFail":"download"}}}'
-            version: '9.15.5'
-          - label: 'devEngines onFail=download, range'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":">=9.15.0","onFail":"download"}}}'
-            version: '>=9.15.0'
-          - label: 'devEngines onFail=error, exact (#252)'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":"9.15.5","onFail":"error"}}}'
-            version: '9.15.5'
-          - label: 'devEngines onFail=error, range (#252)'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":">=9.15.0","onFail":"error"}}}'
-            version: '>=9.15.0'
-          - label: 'explicit version: pnpm_config_pm_on_fail not exported'
-            # Regression guard for the af8e203 scope fix: when the user passes an
-            # explicit `version:` input, the action must NOT export
-            # pnpm_config_pm_on_fail=download, so the user's strict onFail policy
-            # is preserved. Asserted directly on the env var rather than pnpm
-            # runtime behavior — different pnpm majors read devEngines
-            # differently (v10 ignores it, v11+ honors it).
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":"9.15.5","onFail":"error"}}}'
-            explicit_version: '10.33.0'
-            expect_pm_on_fail_unset: true
+        pnpm:
+          - 9.15.5
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest

    steps:
      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1

-      - name: Set up package.json
-        run: echo '${{ matrix.manifest }}' > package.json
-        shell: bash
-
      - name: Run the action
        uses: ./
        with:
-          version: ${{ matrix.explicit_version }}
+          version: 9.15.5
+          dest: ~/test/pnpm

-      - name: 'Test: pnpm reports the pinned version'
-        if: ${{ !matrix.expect_pm_on_fail_unset }}
-        env:
-          REQUIRED: ${{ matrix.version }}
-        run: |
-          set -e
-          actual="$(pnpm --version)"
-          echo "pnpm version: ${actual}"
-          if [ "${REQUIRED}" = ">=9.15.0" ]; then
-            min="9.15.0"
-            if [ "$(printf '%s\n' "${min}" "${actual}" | sort -V | head -n1)" != "${min}" ]; then
-              echo "Expected pnpm version >= ${min}, but got ${actual}"
-              exit 1
-            fi
-          else
-            if [ "${actual}" != "${REQUIRED}" ]; then
-              echo "Expected pnpm version ${REQUIRED}, but got ${actual}"
-              exit 1
-            fi
-          fi
-        shell: bash
+      - name: 'Test: which'
+        run: which pnpm && which pnpx

-      - name: 'Test: pnpm_config_pm_on_fail not exported (explicit version preserves strict policy)'
-        if: ${{ matrix.expect_pm_on_fail_unset }}
-        run: |
-          if [ -n "${pnpm_config_pm_on_fail:-}" ]; then
-            echo "Expected pnpm_config_pm_on_fail to be unset, but got: '${pnpm_config_pm_on_fail}'"
-            exit 1
-          fi
-          echo "pnpm_config_pm_on_fail is unset, as expected"
-        shell: bash
+      - name: 'Test: version'
+        run: pnpm --version

-  standalone:
-    name: Standalone mode
+  test_standalone:
+    name: Test with standalone

-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest

    steps:
      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
@@ -179,125 +94,84 @@ jobs:
          version: 9.15.0
          standalone: true

-      - name: 'Test: pnpm works'
+      - name: 'Test: which'
+        run: which pnpm
+
+      - name: 'Test: version'
+        run: pnpm --version
+
+      - name: 'Test: install in a fresh project'
        run: |
-          set -e
-          which pnpm
-          actual="$(pnpm --version)"
-          if [ "${actual}" != "9.15.0" ]; then
-            echo "Expected 9.15.0, got ${actual}"
-            exit 1
-          fi
          mkdir /tmp/test-standalone
          cd /tmp/test-standalone
          pnpm init
          pnpm add is-odd
        shell: bash

-  standalone_windows_self_update:
-    # Regression guard for the patchPnpmEnv PATH-shadow bug. When
-    # standalone: true on Windows AND the requested pnpm differs from the
-    # bootstrap, the previous patchPnpmEnv prepended node_modules/.bin to
-    # PATH; that directory contains an npm-created pnpm.cmd shim pointing
-    # at the BOOTSTRAP pnpm, which shadowed the self-updated pnpm at
-    # $PNPM_HOME/bin and caused `pnpm install` inside the action to run
-    # under the bootstrap version. Exercising a newer-pnpm-only flag
-    # (`--no-runtime`, added in 11.1.0) makes the regression assertable:
-    # if the bootstrap (11.0.4) handles the install, it errors with
-    # "Unknown option: 'runtime'".
-    name: 'Standalone Windows self-update (PATH regression)'
-    runs-on: windows-latest
+  test_dev_engines:
+    name: Test with devEngines.packageManager
+
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        version:
+          - '9.15.5'
+          - '>=9.15.0'
+
    steps:
      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1

-      - name: Set up package.json with a minimal manifest
-        # run_install needs a manifest to install against. Removing the
-        # repo's existing pnpm-lock.yaml avoids frozen-lockfile mismatch.
-        run: |
-          rm -f pnpm-lock.yaml
-          echo '{"name":"sw","private":true,"packageManager":"pnpm@11.1.0"}' > package.json
+      - name: Set up package.json with devEngines.packageManager
+        run: echo '{"devEngines":{"packageManager":{"name":"pnpm","version":"${{ matrix.version }}","onFail":"download"}}}' > package.json
        shell: bash

      - name: Run the action
        uses: ./
-        with:
-          version: 11.1.0
-          standalone: true
-          run_install: |
-            args: ['--no-runtime']

-      - name: 'Test: pnpm install completed under the self-updated pnpm'
-        # If the bug recurs, the previous step's run_install will have failed
-        # the job with "Unknown option: 'runtime'", so reaching this step
-        # implies success. Still verify the version on PATH matches request.
-        env:
-          REQUIRED: '11.1.0'
+      - name: 'Test: which'
+        run: which pnpm; which pnpx
+
+      - name: 'Test: version'
        run: |
          set -e
+          required='${{ matrix.version }}'
          actual="$(pnpm --version)"
-          echo "pnpm --version: ${actual}"
-          if [ "${actual}" != "${REQUIRED}" ]; then
-            echo "Expected pnpm ${REQUIRED}, got ${actual}"
+          echo "pnpm version: ${actual}"
+
+          if [ "${required}" = ">=9.15.0" ]; then
+            min="9.15.0"
+            if [ "$(printf '%s\n' "${min}" "${actual}" | sort -V | head -n1)" != "${min}" ]; then
+              echo "Expected pnpm version >= ${min}, but got ${actual}"
              exit 1
            fi
+          else
+            if [ "${actual}" != "${required}" ]; then
+              echo "Expected pnpm version ${required}, but got ${actual}"
+              exit 1
+            fi
+          fi
        shell: bash

-  cache_store_path:
-    # Regression guard for #233. When package.json pins a pnpm major that
-    # differs from the bootstrap pnpm's major, the bootstrap reports its
-    # own STORE_VERSION from `pnpm store path` (the `store` command skips
-    # pnpm's auto-switch). The user's actual `pnpm install` runs under the
-    # pinned version and writes to a different STORE_VERSION, so the post
-    # step's saveCache then fails with "Path Validation Error". The fix is
-    # to self-update the bootstrap to the pinned version up front.
-    name: 'Cache store path matches install (#233): ${{ matrix.label }}'
+  test_run_install:
+    name: 'Test with run_install (${{ matrix.run_install.name }}, ${{ matrix.os }})'

-    runs-on: ubuntu-latest
-
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - label: 'packageManager pnpm@10.33.0'
-            manifest: '{"packageManager":"pnpm@10.33.0","dependencies":{"is-odd":"3.0.1"}}'
-          - label: 'devEngines exact pnpm@10.33.0'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":"10.33.0"}},"dependencies":{"is-odd":"3.0.1"}}'
-          - label: 'devEngines range >=10 <11'
-            manifest: '{"devEngines":{"packageManager":{"name":"pnpm","version":">=10 <11"}},"dependencies":{"is-odd":"3.0.1"}}'
-
-    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
-
-      - name: Set up package.json
-        run: echo '${{ matrix.manifest }}' > package.json
-        shell: bash
-
-      - id: pnpm
-        uses: ./
-        with:
-          cache: true
-          run_install: |
-            - args: [--no-frozen-lockfile]
-
-      - name: 'Test: store path computed by the action exists on disk'
-        run: |
-          set -e
-          actual="$(pnpm store path --silent)"
-          echo "pnpm store path: ${actual}"
-          if [ ! -d "${actual}" ]; then
-            echo "Expected store path to exist on disk; cache save would fail"
-            exit 1
-          fi
-        shell: bash
-
-  run_install:
-    name: 'run_install (${{ matrix.run_install.name }})'
-
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}

    strategy:
      fail-fast: false
      matrix:
+        pnpm:
+          - 9.15.5
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
        run_install:
          - name: 'null'
            value: 'null'
@@ -318,14 +192,8 @@ jobs:
          version: 9.15.5
          run_install: ${{ matrix.run_install.value }}

-      - name: 'Test: pnpm works'
-        run: |
-          set -e
-          which pnpm
-          which pnpx
-          actual="$(pnpm --version)"
-          if [ "${actual}" != "9.15.5" ]; then
-            echo "Expected 9.15.5, got ${actual}"
-            exit 1
-          fi
-        shell: bash
+      - name: 'Test: which'
+        run: which pnpm; which pnpx
+
+      - name: 'Test: version'
+        run: pnpm --version
--- a/.gitignore
+++ b/.gitignore
@@ -9,4 +9,3 @@ temp
 tmp.*
 temp.*
 .pnpm-store
-.claude
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Version of pnpm to install.

 **Optional** when there is a [`packageManager` field in the `package.json`](https://nodejs.org/api/corepack.html).

-otherwise, this field is **required** It supports npm versioning scheme, it could be an exact version (such as `10.9.8`), or a version range (such as `10`, `10.x.x`, `10.9.x`, `^10.9.8`, `*`, etc.), or `latest`.
+otherwise, this field is **required** It supports npm versioning scheme, it could be an exact version (such as `6.24.1`), or a version range (such as `6`, `6.x.x`, `6.24.x`, `^6.24.1`, `*`, etc.), or `latest`.

 ### `dest`

@@ -48,7 +48,7 @@ If `run_install` is a YAML string representation of either an object or an array

 ### `cache_dependency_path`

-**Optional** (_type:_ `string`, _default:_ `pnpm-lock.yaml`) File path to the pnpm lockfile, whose contents hash will be used as a cache key. Accepts multiple paths delimited by newlines.
+**Optional** (_type:_ `string|string[]`, _default:_ `pnpm-lock.yaml`) File path to the pnpm lockfile, which contents hash will be used as a cache key.

 ### `package_json_file`

@@ -86,7 +86,7 @@ jobs:
    runs-on: ubuntu-latest

    steps:
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@v5
        with:
          version: 10
 ```
@@ -105,7 +105,7 @@ jobs:
    runs-on: ubuntu-latest

    steps:
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@v5
 ```

 ### Install pnpm and a few npm packages
@@ -120,9 +120,9 @@ jobs:
    runs-on: ubuntu-latest

    steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v4

-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@v5
        with:
          version: 10
          run_install: |
@@ -144,9 +144,9 @@ jobs:

    steps:
      - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4

-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@v5
        name: Install pnpm
        with:
          version: 10
@@ -158,33 +158,6 @@ jobs:

 **Note:** You don't need to run `pnpm store prune` at the end; post-action has already taken care of that.

-### Cache dependencies from multiple lockfiles
-
-```yaml
-on:
-  - push
-  - pull_request
-
-jobs:
-  cache-and-install-multiple:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v6
-
-      - uses: pnpm/action-setup@v6
-        with:
-          version: 10
-          cache: true
-          cache_dependency_path: |
-            one/pnpm-lock.yaml
-            two/pnpm-lock.yaml
-          run_install: |
-            - cwd: one
-            - cwd: two
-```
-
 ## Notes

 This action does not setup Node.js for you, use [actions/setup-node](https://github.com/actions/setup-node) yourself.
--- a/action.yml
+++ b/action.yml
@@ -20,7 +20,7 @@ inputs:
    required: false
    default: 'false'
  cache_dependency_path:
-    description: File path to the pnpm lockfile, whose contents hash will be used as a cache key. Accepts multiple paths delimited by newlines.
+    description: File path to the pnpm lockfile, which contents hash will be used as a cache key
    required: false
    default: 'pnpm-lock.yaml'
  package_json_file:
--- a/dist/index.js
+++ b/dist/index.js
--- a/package.json
+++ b/package.json
@@ -3,8 +3,7 @@
  "scripts": {
    "build:bundle": "esbuild src/index.ts --bundle --platform=node --target=node24 --format=cjs --minify --outfile=dist/index.js --loader:.json=json",
    "build": "pnpm run build:bundle",
-    "start": "pnpm run build && sh ./run.sh",
-    "update-bootstrap": "node scripts/update-bootstrap.mjs"
+    "start": "pnpm run build && sh ./run.sh"
  },
  "dependencies": {
    "@actions/cache": "^4.1.0",
--- a/scripts/update-bootstrap.mjs
+++ b/scripts/update-bootstrap.mjs
@@ -1,47 +0,0 @@
-#!/usr/bin/env node
-
-// Usage: node scripts/update-bootstrap.mjs [version]
-// If version is omitted, fetches the latest next-11 tag from npm.
-// Regenerates the bootstrap lockfiles used by action-setup to install pnpm via npm.
-
-import { execSync } from 'child_process'
-import { mkdtempSync, rmSync, readFileSync, writeFileSync } from 'fs'
-import { join } from 'path'
-import { tmpdir } from 'os'
-
-const BOOTSTRAP_DIR = new URL('../src/install-pnpm/bootstrap/', import.meta.url).pathname
-
-const version = process.argv[2] || resolveLatestVersion()
-
-console.log(`Updating bootstrap lockfiles to pnpm@${version} ...`)
-
-generateLock('pnpm-lock.json', { pnpm: version }, 'bootstrap-pnpm')
-generateLock('exe-lock.json', { '@pnpm/exe': version }, 'bootstrap-exe')
-
-console.log('Done!')
-
-function resolveLatestVersion() {
-  const json = execSync('npm view @pnpm/exe dist-tags --json', { encoding: 'utf8' })
-  const tags = JSON.parse(json)
-  const version = tags['next-11'] || tags['latest']
-  if (!version) {
-    console.error('Could not determine latest pnpm version from npm dist-tags')
-    process.exit(1)
-  }
-  return version
-}
-
-function generateLock(filename, dependencies, name) {
-  const tmp = mkdtempSync(join(tmpdir(), 'pnpm-bootstrap-'))
-  try {
-    writeFileSync(join(tmp, 'package.json'), JSON.stringify({ private: true, dependencies }))
-    execSync('npm install --package-lock-only --ignore-scripts', { cwd: tmp, stdio: 'pipe' })
-    const lock = readFileSync(join(tmp, 'package-lock.json'), 'utf8')
-    const parsed = JSON.parse(lock)
-    parsed.name = name
-    writeFileSync(join(BOOTSTRAP_DIR, filename), JSON.stringify(parsed, null, 2) + '\n')
-    console.log(`  ${filename} -> ${Object.values(dependencies)[0]}@${version}`)
-  } finally {
-    rmSync(tmp, { recursive: true, force: true })
-  }
-}
--- a/src/index.ts
+++ b/src/index.ts
@@ -8,30 +8,28 @@ import pnpmInstall from './pnpm-install'
 import pruneStore from './pnpm-store-prune'

 async function main() {
+  const inputs = getInputs()
+
  if (getState('is_post') === 'true') {
-    await runPost()
+    await runPost(inputs)
  } else {
-    await runMain()
+    await runMain(inputs)
  }
 }

-async function runMain() {
-  const inputs = getInputs()
-  saveState('inputs', inputs)
+async function runMain(inputs: Inputs) {
  saveState('is_post', 'true')

-  const binDest = await installPnpm(inputs)
-  if (binDest === undefined) return
+  await installPnpm(inputs)
  console.log('Installation Completed!')
-  setOutputs(inputs, binDest)
+  setOutputs(inputs)

  await restoreCache(inputs)

  pnpmInstall(inputs)
 }

-async function runPost() {
-  const inputs = JSON.parse(getState('inputs')) as Inputs
+async function runPost(inputs: Inputs) {
  pruneStore(inputs)
  await saveCache(inputs)
 }
--- a/src/install-pnpm/bootstrap/exe-lock.json
+++ b/src/install-pnpm/bootstrap/exe-lock.json
@@ -5,18 +5,17 @@
  "packages": {
    "": {
      "dependencies": {
-        "@pnpm/exe": "11.1.1"
+        "@pnpm/exe": "11.0.0-beta.3"
      }
    },
    "node_modules/@pnpm/exe": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/@pnpm/exe/-/exe-11.1.1.tgz",
-      "integrity": "sha512-5mQnDW1NCBRRWA+cnGhQO+tIrfSfWm3/IyGxU88LnT+tzNW5UrwwKfjsnnYJToyAjIfdfEJtJKUxCvP+mhA+nQ==",
+      "version": "11.0.0-beta.3",
+      "resolved": "https://registry.npmjs.org/@pnpm/exe/-/exe-11.0.0-beta.3.tgz",
+      "integrity": "sha512-yWNlHHdYmvf4c0MCkCzAa4csJDPdA+7yJCbXBUDXMbUu/0Zv/AxtO77q24MwlnBUC0dWeA+0F/pPmdkR9aTV2A==",
      "hasInstallScript": true,
      "license": "MIT",
      "dependencies": {
-        "@reflink/reflink": "0.1.19",
-        "detect-libc": "^2.0.3"
+        "@reflink/reflink": "0.1.19"
      },
      "bin": {
        "pn": "pn",
@@ -28,19 +27,18 @@
        "url": "https://opencollective.com/pnpm"
      },
      "optionalDependencies": {
-        "@pnpm/linux-arm64": "11.1.1",
-        "@pnpm/linux-x64": "11.1.1",
-        "@pnpm/linuxstatic-arm64": "11.1.1",
-        "@pnpm/linuxstatic-x64": "11.1.1",
-        "@pnpm/macos-arm64": "11.1.1",
-        "@pnpm/win-arm64": "11.1.1",
-        "@pnpm/win-x64": "11.1.1"
+        "@pnpm/linux-arm64": "11.0.0-beta.3",
+        "@pnpm/linux-x64": "11.0.0-beta.3",
+        "@pnpm/macos-arm64": "11.0.0-beta.3",
+        "@pnpm/macos-x64": "11.0.0-beta.3",
+        "@pnpm/win-arm64": "11.0.0-beta.3",
+        "@pnpm/win-x64": "11.0.0-beta.3"
      }
    },
    "node_modules/@pnpm/linux-arm64": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/@pnpm/linux-arm64/-/linux-arm64-11.1.1.tgz",
-      "integrity": "sha512-u9hs51XV0/gU5LLfNLoQsozGKIxNjxsh/0xPr+8Hny0M38psa4lBtwFvarL2bLToPIrtueQYi65LdlzRxITRyg==",
+      "version": "11.0.0-beta.3",
+      "resolved": "https://registry.npmjs.org/@pnpm/linux-arm64/-/linux-arm64-11.0.0-beta.3.tgz",
+      "integrity": "sha512-TF2fyuCY9GggR4kfhjo1hMmgn+rIohenwNoH0tLPM7JlBK7/UAIFt1LI+o999tRwTCEw7gnxHFwtI2vyQuDfNw==",
      "cpu": [
        "arm64"
      ],
@@ -54,9 +52,9 @@
      }
    },
    "node_modules/@pnpm/linux-x64": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/@pnpm/linux-x64/-/linux-x64-11.1.1.tgz",
-      "integrity": "sha512-yQO9i57oyJmIG22BjV7sqLUT2syKQohiku8yNZRgp7M6wsVkikpVLLVSpBifQnrI/P/roueKnWSUEESH1aPaoA==",
+      "version": "11.0.0-beta.3",
+      "resolved": "https://registry.npmjs.org/@pnpm/linux-x64/-/linux-x64-11.0.0-beta.3.tgz",
+      "integrity": "sha512-7GrLsnSuDH62y486GUTwJdohGIC1ugz9ZJkbKOHgxIAkNGcSTJ1IkkdARtv7/WMmOEwwESDmtpOQ6LmjnpDMSA==",
      "cpu": [
        "x64"
      ],
@@ -69,48 +67,10 @@
        "url": "https://opencollective.com/pnpm"
      }
    },
-    "node_modules/@pnpm/linuxstatic-arm64": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/@pnpm/linuxstatic-arm64/-/linuxstatic-arm64-11.1.1.tgz",
-      "integrity": "sha512-FUZB8L9Z8L5m88G0RTx5AsHFr5yUQPW+28zQdTNUWxiLwj11FW/fOLodYdcNYHdNJFepsZyqt3aRnpiqIdZb2g==",
-      "cpu": [
-        "arm64"
-      ],
-      "libc": [
-        "musl"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ],
-      "funding": {
-        "url": "https://opencollective.com/pnpm"
-      }
-    },
-    "node_modules/@pnpm/linuxstatic-x64": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/@pnpm/linuxstatic-x64/-/linuxstatic-x64-11.1.1.tgz",
-      "integrity": "sha512-I/z56hfa1zM5F/Unup/1NrgsA+dcptsKQ2TjJLFz3wHKDx0RLrfF7DB0Rkpnr5IoAZ33v0GFZjlGhkOtc9VFGw==",
-      "cpu": [
-        "x64"
-      ],
-      "libc": [
-        "musl"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ],
-      "funding": {
-        "url": "https://opencollective.com/pnpm"
-      }
-    },
    "node_modules/@pnpm/macos-arm64": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/@pnpm/macos-arm64/-/macos-arm64-11.1.1.tgz",
-      "integrity": "sha512-YQu6fC27F4jTIpXhF+4PdzOV7uSnVVG9KUxj5W+AFj0XFlUvBw+I1NsoPCY6uV1nccxWpIAZOTZtSj8+hWPb8w==",
+      "version": "11.0.0-beta.3",
+      "resolved": "https://registry.npmjs.org/@pnpm/macos-arm64/-/macos-arm64-11.0.0-beta.3.tgz",
+      "integrity": "sha512-NQKgI1DURrEiOUzpxL0Mc+yn7DV4tpShqGnjaJLbz8ZCXsX/qhmybebvCG3r+IfSk3P5KID66lcgC/Osiaz0Dg==",
      "cpu": [
        "arm64"
      ],
@@ -123,10 +83,26 @@
        "url": "https://opencollective.com/pnpm"
      }
    },
+    "node_modules/@pnpm/macos-x64": {
+      "version": "11.0.0-beta.3",
+      "resolved": "https://registry.npmjs.org/@pnpm/macos-x64/-/macos-x64-11.0.0-beta.3.tgz",
+      "integrity": "sha512-Ky22KFYHXx8+8WU4KJT9NXVgzFioL2w9pHTQjsqTK70AbxiErscPYhrFIehlCNbXjgs+tGVIy13QNKkiwvmS8w==",
+      "cpu": [
+        "x64"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "funding": {
+        "url": "https://opencollective.com/pnpm"
+      }
+    },
    "node_modules/@pnpm/win-arm64": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/@pnpm/win-arm64/-/win-arm64-11.1.1.tgz",
-      "integrity": "sha512-2HvZut3IcKPxzIfOjBJ4677PaLIh57mWccL86O+q71QhO5emnQvht0CE19IoEyUIOEe1WjlN+Su/dD5k6CuGyg==",
+      "version": "11.0.0-beta.3",
+      "resolved": "https://registry.npmjs.org/@pnpm/win-arm64/-/win-arm64-11.0.0-beta.3.tgz",
+      "integrity": "sha512-7L8TFNDm25m+XYSyhcola3YFd/li6BZzzl56SsyGnZabsvUslMwnDiJad48wOz8IuN7zsrTSGh+X/x6F+GdrFQ==",
      "cpu": [
        "arm64"
      ],
@@ -140,9 +116,9 @@
      }
    },
    "node_modules/@pnpm/win-x64": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/@pnpm/win-x64/-/win-x64-11.1.1.tgz",
-      "integrity": "sha512-QXBIBErgPhGLovOVzTRIpHsejFKebyqlcF3fea/TfH87gkhN5yWH0WuTPRBoOWvpk6aNhjDW4RPUMx8RaPqxjw==",
+      "version": "11.0.0-beta.3",
+      "resolved": "https://registry.npmjs.org/@pnpm/win-x64/-/win-x64-11.0.0-beta.3.tgz",
+      "integrity": "sha512-Z/6OpMUaIpggXjCtWEhp6kWjiT/2EImhkJAu8AodOORqeNcWouGEq3sO4XU0em6d+pAHmdV0hWMQ2xCUmPVuiA==",
      "cpu": [
        "x64"
      ],
@@ -213,9 +189,6 @@
      "cpu": [
        "arm64"
      ],
-      "libc": [
-        "glibc"
-      ],
      "license": "MIT",
      "optional": true,
      "os": [
@@ -232,9 +205,6 @@
      "cpu": [
        "arm64"
      ],
-      "libc": [
-        "musl"
-      ],
      "license": "MIT",
      "optional": true,
      "os": [
@@ -251,9 +221,6 @@
      "cpu": [
        "x64"
      ],
-      "libc": [
-        "glibc"
-      ],
      "license": "MIT",
      "optional": true,
      "os": [
@@ -270,9 +237,6 @@
      "cpu": [
        "x64"
      ],
-      "libc": [
-        "musl"
-      ],
      "license": "MIT",
      "optional": true,
      "os": [
@@ -313,15 +277,6 @@
      "engines": {
        "node": ">= 10"
      }
-    },
-    "node_modules/detect-libc": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.1.2.tgz",
-      "integrity": "sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ==",
-      "license": "Apache-2.0",
-      "engines": {
-        "node": ">=8"
-      }
    }
  }
 }
--- a/src/install-pnpm/bootstrap/pnpm-lock.json
+++ b/src/install-pnpm/bootstrap/pnpm-lock.json
@@ -5,13 +5,13 @@
  "packages": {
    "": {
      "dependencies": {
-        "pnpm": "11.1.1"
+        "pnpm": "11.0.0-beta.3"
      }
    },
    "node_modules/pnpm": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/pnpm/-/pnpm-11.1.1.tgz",
-      "integrity": "sha512-0f319zxhe2T6GlaoHDyN/g6WbjOmAQqiVrUXrne+Idk+Ba/8DeGoOw5PKdVp9otEaujwaM1yR8C7PfD7TXvfmg==",
+      "version": "11.0.0-beta.3",
+      "resolved": "https://registry.npmjs.org/pnpm/-/pnpm-11.0.0-beta.3.tgz",
+      "integrity": "sha512-6PrfRjycZV4vRX6ttG9oR6pOgbI2/OcF2QLOzHm35UcRuvtqP4zf3wQfAAPwEbeu1uAbpSg/Q5cL8h32tumy6Q==",
      "license": "MIT",
      "bin": {
        "pn": "bin/pnpm.mjs",
--- a/src/install-pnpm/index.ts
+++ b/src/install-pnpm/index.ts
@@ -4,15 +4,13 @@ import runSelfInstaller from './run'

 export { runSelfInstaller }

-export async function install(inputs: Inputs): Promise<string | undefined> {
+export async function install(inputs: Inputs) {
  startGroup('Running self-installer...')
-  const { exitCode, binDest } = await runSelfInstaller(inputs)
+  const status = await runSelfInstaller(inputs)
  endGroup()
-  if (exitCode) {
-    setFailed(`Something went wrong, self-installer exits with code ${exitCode}`)
-    return undefined
+  if (status) {
+    return setFailed(`Something went wrong, self-installer exits with code ${status}`)
  }
-  return binDest
 }

 export default install
--- a/src/install-pnpm/run.ts
+++ b/src/install-pnpm/run.ts
@@ -12,12 +12,7 @@ import exeLock from './bootstrap/exe-lock.json'
 const BOOTSTRAP_PNPM_PACKAGE_JSON = JSON.stringify({ private: true, dependencies: { pnpm: pnpmLock.packages['node_modules/pnpm'].version } })
 const BOOTSTRAP_EXE_PACKAGE_JSON = JSON.stringify({ private: true, dependencies: { '@pnpm/exe': exeLock.packages['node_modules/@pnpm/exe'].version } })

-export interface SelfInstallerResult {
-  exitCode: number
-  binDest: string
-}
-
-export async function runSelfInstaller(inputs: Inputs): Promise<SelfInstallerResult> {
+export async function runSelfInstaller(inputs: Inputs): Promise<number> {
  const { version, dest, packageJsonFile } = inputs

  // pnpm v11 requires Node >= 22.13; use standalone (exe) bootstrap which
@@ -34,81 +29,49 @@ export async function runSelfInstaller(inputs: Inputs): Promise<SelfInstallerRes
  await writeFile(path.join(dest, 'package.json'), packageJson)
  await writeFile(path.join(dest, 'package-lock.json'), JSON.stringify(lockfile))

-  // Append the action's node directory to PATH so npm's
-  // `#!/usr/bin/env node` shebang resolves on runners (e.g. GHE
-  // self-hosted) where node isn't already on PATH. Append (not
-  // prepend) so a user-installed toolchain on PATH — e.g. from a
-  // prior `setup-node` step — keeps precedence; otherwise the
-  // runner-bundled node would shadow it and pair the user's npm
-  // with a mismatched node version. npm itself is resolved via
-  // PATH — on the GitHub Actions runner it is not co-located with
-  // `process.execPath`.
-  const nodeDir = path.dirname(process.execPath)
-  // On Windows, the PATH key casing varies; search case-insensitively.
-  const pathKey = Object.keys(process.env).find(k => k.toUpperCase() === 'PATH') ?? 'PATH'
-  const currentPath = process.env[pathKey]
-  const npmEnv = { ...process.env, [pathKey]: currentPath ? currentPath + path.delimiter + nodeDir : nodeDir }
-  const npmExitCode = await runCommand('npm', ['ci'], { cwd: dest, env: npmEnv })
+  const npmExitCode = await runCommand('npm', ['ci'], { cwd: dest })
  if (npmExitCode !== 0) {
-    return { exitCode: npmExitCode, binDest: path.join(dest, 'node_modules', '.bin') }
+    return npmExitCode
  }

-  // On Windows with standalone mode, npm's .bin shims can't properly
-  // execute the extensionless @pnpm/exe native binaries. Add the
-  // @pnpm/exe directory directly to PATH so pnpm.exe is found natively.
-  const pnpmHome = standalone && process.platform === 'win32'
-    ? path.join(dest, 'node_modules', '@pnpm', 'exe')
-    : path.join(dest, 'node_modules', '.bin')
-  // PNPM_HOME/bin is where `pnpm self-update` places the target version
-  // binary. It must have higher PATH precedence than pnpmHome (which
-  // contains the bootstrap binary) so the self-updated version is found
-  // first. The bootstrap pnpm is invoked via absolute path, not PATH,
-  // so this ordering does not affect the bootstrap step.
+  const pnpmHome = path.join(dest, 'node_modules', '.bin')
  addPath(pnpmHome)
  addPath(path.join(pnpmHome, 'bin'))
  exportVariable('PNPM_HOME', pnpmHome)

  // Ensure pnpm bin link exists — npm ci sometimes doesn't create it
-  if (process.platform !== 'win32') {
-    const pnpmBinLink = path.join(dest, 'node_modules', '.bin', 'pnpm')
+  const pnpmBinLink = path.join(pnpmHome, 'pnpm')
  if (!existsSync(pnpmBinLink)) {
-      await mkdir(path.join(dest, 'node_modules', '.bin'), { recursive: true })
+    await mkdir(pnpmHome, { recursive: true })
    const target = standalone
      ? path.join('..', '@pnpm', 'exe', 'pnpm')
      : path.join('..', 'pnpm', 'bin', 'pnpm.mjs')
    await symlink(target, pnpmBinLink)
  }
-  }

  const bootstrapPnpm = standalone
-    ? path.join(dest, 'node_modules', '@pnpm', 'exe', process.platform === 'win32' ? 'pnpm.exe' : 'pnpm')
+    ? path.join(dest, 'node_modules', '@pnpm', 'exe', 'pnpm')
    : path.join(dest, 'node_modules', 'pnpm', 'bin', 'pnpm.mjs')

-  // Self-update the bootstrap to the requested pnpm version. readTargetVersion
-  // either returns a value or throws, so this always runs.
+  // Determine the target version
  const targetVersion = readTargetVersion({ version, packageJsonFile })
+
+  if (targetVersion) {
    const cmd = standalone ? bootstrapPnpm : process.execPath
    const args = standalone ? ['self-update', targetVersion] : [bootstrapPnpm, 'self-update', targetVersion]
    const exitCode = await runCommand(cmd, args, { cwd: dest })
    if (exitCode !== 0) {
-    return { exitCode, binDest: pnpmHome }
+      return exitCode
    }
-  // self-update writes the target pnpm/pnpx into PNPM_HOME/bin, leaving
-  // the bootstrap symlinks in pnpmHome pointing at the old version. Use
-  // PNPM_HOME/bin so consumers of the bin_dest output (e.g.
-  // `${steps.pnpm.outputs.bin_dest}/pnpm`) invoke the requested version.
-  //
-  // When the requested version resolves to the bootstrap version, self-update
-  // is a no-op and PNPM_HOME/bin is not created — fall back to pnpmHome,
-  // whose symlinks already point at the right version.
-  const updatedBinDir = path.join(pnpmHome, 'bin')
-  return { exitCode: 0, binDest: existsSync(updatedBinDir) ? updatedBinDir : pnpmHome }
+  }
+
+  return 0
 }

 function readTargetVersion(opts: {
  readonly version?: string | undefined
  readonly packageJsonFile: string
-}): string {
+}): string | undefined {
  const { version, packageJsonFile } = opts
  const { GITHUB_WORKSPACE } = process.env

@@ -129,15 +92,12 @@ function readTargetVersion(opts: {
    }
  }

-  // packageManager is always exact `pnpm@<version>[+<integrity>]` per spec.
-  // Strip the integrity hash for self-update.
-  const packageManagerVersion =
-    typeof packageManager === 'string' && packageManager.startsWith('pnpm@')
-      ? packageManager.slice('pnpm@'.length).split('+')[0]
-      : undefined
-
  if (version) {
-    if (packageManagerVersion && packageManagerVersion !== version) {
+    if (
+      typeof packageManager === 'string' &&
+      packageManager.startsWith('pnpm@') &&
+      packageManager.replace('pnpm@', '') !== version
+    ) {
      throw new Error(`Multiple versions of pnpm specified:
  - version ${version} in the GitHub Action config with the key "version"
  - version ${packageManager} in the package.json with the key "packageManager"
@@ -147,22 +107,13 @@ Remove one of these versions to avoid version mismatch errors like ERR_PNPM_BAD_
    return version
  }

-  // Self-update the bootstrap pnpm to the version pinned in package.json so
-  // PATH-resolved `pnpm` (and the bin_dest output) reflect the target
-  // version. Without this, `pnpm store path` runs as the bootstrap and
-  // reports a different STORE_VERSION than the one the user's actual
-  // install writes to — breaking cache: true and actions/setup-node's
-  // `cache: pnpm` on cold caches (issue #233).
-  //
-  // devEngines.packageManager takes priority over packageManager, matching
-  // pnpm's getWantedPackageManager logic. `pnpm self-update` accepts both
-  // exact versions and semver ranges, so we pass either through directly.
-  if (devEngines?.packageManager?.name === 'pnpm' && devEngines.packageManager.version) {
-    return devEngines.packageManager.version
+  // pnpm will automatically download and switch to the right version
+  if (typeof packageManager === 'string' && packageManager.startsWith('pnpm@')) {
+    return undefined
  }

-  if (packageManagerVersion) {
-    return packageManagerVersion
+  if (devEngines?.packageManager?.name === 'pnpm' && devEngines.packageManager.version) {
+    return undefined
  }

  if (!GITHUB_WORKSPACE) {
@@ -192,11 +143,10 @@ function getSystemNodeVersion(): Promise<{ major: number; minor: number }> {
  })
 }

-function runCommand(cmd: string, args: string[], opts: { cwd: string; env?: Record<string, string | undefined> }): Promise<number> {
+function runCommand(cmd: string, args: string[], opts: { cwd: string }): Promise<number> {
  return new Promise<number>((resolve, reject) => {
    const cp = spawn(cmd, args, {
      cwd: opts.cwd,
-      env: opts.env,
      stdio: ['pipe', 'inherit', 'inherit'],
      shell: process.platform === 'win32',
    })
--- a/src/outputs/index.ts
+++ b/src/outputs/index.ts
@@ -1,9 +1,10 @@
-import { setOutput } from '@actions/core'
+import { setOutput, addPath } from '@actions/core'
 import { Inputs } from '../inputs'
+import { getBinDest } from '../utils'

-export function setOutputs(inputs: Inputs, binDest: string) {
-  // NOTE: addPath is already called in installPnpm — do not call it again
-  // here, as a second addPath would shadow the correct entry on Windows.
+export function setOutputs(inputs: Inputs) {
+  const binDest = getBinDest(inputs)
+  addPath(binDest)
  setOutput('dest', inputs.dest)
  setOutput('bin_dest', binDest)
 }
--- a/src/pnpm-install/index.ts
+++ b/src/pnpm-install/index.ts
@@ -1,8 +1,11 @@
 import { setFailed, startGroup, endGroup } from '@actions/core'
 import { spawnSync } from 'child_process'
 import { Inputs } from '../inputs'
+import { patchPnpmEnv } from '../utils'

 export function runPnpmInstall(inputs: Inputs) {
+  const env = patchPnpmEnv(inputs)
+
  for (const options of inputs.runInstall) {
    const args = ['install']
    if (options.recursive) args.unshift('recursive')
@@ -11,16 +14,11 @@ export function runPnpmInstall(inputs: Inputs) {
    const cmdStr = ['pnpm', ...args].join(' ')
    startGroup(`Running ${cmdStr}...`)

-    // spawnSync inherits process.env, which already has $PNPM_HOME/bin and
-    // $PNPM_HOME prepended via addPath() in install-pnpm. Do NOT pass a
-    // hand-patched env that adds node_modules/.bin to the front — on
-    // Windows standalone, .bin/pnpm.cmd is an npm shim pointing at the
-    // BOOTSTRAP pnpm, which would shadow the self-updated one and break
-    // newer-pnpm-only behavior.
    const { error, status } = spawnSync('pnpm', args, {
      stdio: 'inherit',
      cwd: options.cwd,
      shell: true,
+      env,
    })

    endGroup()
--- a/src/pnpm-store-prune/index.ts
+++ b/src/pnpm-store-prune/index.ts
@@ -1,6 +1,7 @@
 import { warning, startGroup, endGroup } from '@actions/core'
 import { spawnSync } from 'child_process'
 import { Inputs } from '../inputs'
+import { patchPnpmEnv } from '../utils'

 export function pruneStore(inputs: Inputs) {
  if (inputs.runInstall.length === 0) {
@@ -9,11 +10,10 @@ export function pruneStore(inputs: Inputs) {
  }

  startGroup('Running pnpm store prune...')
-  // spawnSync inherits process.env (which has the right PATH from addPath
-  // in install-pnpm). See pnpm-install/index.ts for the rationale.
  const { error, status } = spawnSync('pnpm', ['store', 'prune'], {
    stdio: 'inherit',
    shell: true,
+    env: patchPnpmEnv(inputs),
  })
  endGroup()

--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -0,0 +1,10 @@
+import path from 'path'
+import process from 'process'
+import { Inputs } from '../inputs'
+
+export const getBinDest = (inputs: Inputs): string => path.join(inputs.dest, 'node_modules', '.bin')
+
+export const patchPnpmEnv = (inputs: Inputs): NodeJS.ProcessEnv => ({
+  ...process.env,
+  PATH: path.join(getBinDest(inputs), 'bin') + path.delimiter + getBinDest(inputs) + path.delimiter + process.env.PATH,
+})