fix pnpm-workspace.yaml

pnpm v9 requires the packages field in pnpm-workspace.yaml.
Without it, `pnpm --version` fails with "packages field missing or empty".

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/pr-check.yaml

@@ -0,0 +1,28 @@
+name: pr-check
+
+on: [ pull_request ]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  check-dist:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
+        with:
+          run_install: true
+          version: 9
+
+      - name: Update dist/index.js
+        run: pnpm run build
+
+      - name: Check for uncommitted changes in dist
+        run: git diff --exit-code dist/index.js

pnpm-workspace.yaml

@@ -0,0 +1,4 @@
+packages:
+  - '.'
+allowBuilds:
+  esbuild: true

src/install-pnpm/run.ts

@@ -31,6 +31,7 @@ export async function runSelfInstaller(inputs: Inputs): Promise<number> {
 
   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

src/utils/index.ts

@@ -6,5 +6,5 @@ export const getBinDest = (inputs: Inputs): string => path.join(inputs.dest, 'no
 
 export const patchPnpmEnv = (inputs: Inputs): NodeJS.ProcessEnv => ({
   ...process.env,
-  PATH: getBinDest(inputs) + path.delimiter + process.env.PATH,
+  PATH: path.join(getBinDest(inputs), 'bin') + path.delimiter + getBinDest(inputs) + path.delimiter + process.env.PATH,
 })