Pin pnpm to 11.11.0 via packageManager field

.github/actions/setup-pnpm/action.yml

@@ -1,10 +1,13 @@
 name: Setup pnpm workspace
 description: >
   Node + pnpm + cached store + frozen install of the repo-root pnpm workspace.
-  The CI container ships an older Node (~14) that pnpm/action-setup@v6 rejects
-  (`import.meta.resolve` requires >=20.6): install Node first, then pnpm
-  against that Node, then re-run setup-node to wire the pnpm-store cache
-  (which needs `pnpm store path` available).
+  Install Node first, then pnpm against that Node, then re-run setup-node to
+  wire the pnpm-store cache (which needs `pnpm store path` available).
+  pnpm/action-setup only installs a bootstrap pnpm and lets pnpm's own version
+  switcher fetch the version pinned in packageManager. That switcher crashes
+  with "Cannot use 'in' operator to search for 'integrity' in undefined" when
+  the target is pnpm 11.12.0, so keep the pin on a version it can install
+  (currently 11.11.0).
 
 inputs:
   node-version:
@@ -20,9 +23,7 @@ runs:
         node-version: ${{ inputs.node-version }}
 
     - name: Install pnpm
-      uses: pnpm/action-setup@8912a9102ac27614460f54aedde9e1e7f9aec20d # v6
-      with:
-        version: 11
+      uses: pnpm/action-setup@8912a9102ac27614460f54aedde9e1e7f9aec20d # v6.0.5
 
     - name: Setup Node.js (with pnpm cache)
       uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6

package.json

@@ -14,5 +14,6 @@
     "e2e": "pnpm --filter web3-storage-papi-demo run e2e",
     "demo": "pnpm --filter web3-storage-papi-demo run demo",
     "typecheck:packages": "pnpm --filter './packages/*' --filter web3-storage-papi-demo run typecheck"
-  }
+  },
+  "packageManager": "pnpm@11.11.0+sha512.4463f65fd80ed80d69bc1d4bf163ee94f605c7380fc318bb5b2ebe15f8cd12d49c51a4d59e951b401e764d3b6ca751cbf51bc50ed7001a6bcb4935e684c34882"
 }