CI cacheitem consistency check.

.github/workflows/turborepo-compare-cache-item.yml

@@ -0,0 +1,38 @@
+name: Turborepo Compare Cache Item
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: Turborepo release to test.
+        type: string
+        default: "canary"
+
+jobs:
+  generate_cache_artifact:
+    strategy:
+      matrix:
+        os: [macos-latest, ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16
+
+      - name: create-turbo
+        run: |
+          npm install -g turbo@${{ inputs.version }}
+          npx create-turbo@${{ inputs.version }} my-turborepo npm
+          cd my-turborepo
+          turbo run build --summarize --skip-infer -vvv
+
+      - name: Grab Turborepo artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: cache-item-${{ matrix.os }}-${{ inputs.version }}
+          path: |
+            my-turborepo/node_modules/.cache/turbo
+            my-turborepo/.turbo/runs
+          retention-days: 1