diff --git a/.github/workflows/ci-package-manager.yml b/.github/workflows/ci-package-manager.yml
new file mode 100644
index 0000000..dec49ff
--- /dev/null
+++ b/.github/workflows/ci-package-manager.yml
@@ -0,0 +1,161 @@
+name: ci-package-manager
+
+# This workflow creates a tarball from repo sources.
+# It then checks that each of the following package managers is able to install:
+# - npm
+# - Yarn v1 Classic
+# - Yarn (Modern)
+# - pnpm
+# - bun
+
+on:
+    workflow_call:
+
+jobs:
+    build-tarball:
+        runs-on: ubuntu-latest
+
+        outputs:
+            version: ${{ steps.get_version.outputs.version }}
+
+        steps:
+            - name: Check out repo
+              uses: actions/checkout@v5
+
+            - name: Set up Node.js
+              uses: actions/setup-node@v6
+              with:
+                  node-version: "lts/*"
+
+            - name: Install dependencies
+              run: npm install
+
+            - name: Build tarball
+              run: npm pack
+
+            - name: Upload build artifact
+              uses: actions/upload-artifact@v4
+              with:
+                  name: build
+                  path: eslint-*.tgz
+                  retention-days: 1
+
+            - name: Get version
+              id: get_version
+              run: echo "version=$(jq -r '.version' package.json)" >> "$GITHUB_OUTPUT"
+
+    npm-install:
+        needs: build-tarball
+
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Download build artifact
+              uses: actions/download-artifact@v5
+              with:
+                  name: build
+
+            - name: Set up Node.js
+              uses: actions/setup-node@v6
+              with:
+                  node-version: "lts/*"
+
+            - name: npm install
+              run: |
+                  npm install ./eslint-*-${{ needs.build-tarball.outputs.version }}.tgz -D
+
+    yarn-v1-install:
+        needs: build-tarball
+
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Download build artifact
+              uses: actions/download-artifact@v5
+              with:
+                  name: build
+
+            - name: Set up Node.js
+              uses: actions/setup-node@v6
+              with:
+                  node-version: "lts/*"
+
+            - name: yarn add
+              run: |
+                  yarn add ./eslint-*-${{ needs.build-tarball.outputs.version }}.tgz -D
+
+    yarn-install:
+        needs: build-tarball
+
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Download build artifact
+              uses: actions/download-artifact@v5
+              with:
+                  name: build
+
+            - name: Set up Node.js
+              uses: actions/setup-node@v6
+              with:
+                  node-version: "lts/*"
+
+            - name: Install Corepack latest
+              run: |
+                  npm install -g corepack@latest
+                  corepack enable yarn
+
+            - name: yarn add
+              run: |
+                  corepack use yarn@latest
+                  yarn init -p
+                  yarn add ./eslint-*-${{ needs.build-tarball.outputs.version }}.tgz -D
+              env:
+                  YARN_ENABLE_IMMUTABLE_INSTALLS: 0 # Allow installs to modify lockfile
+
+    pnpm-install:
+        needs: build-tarball
+
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Download build artifact
+              uses: actions/download-artifact@v5
+              with:
+                  name: build
+
+            - name: Install pnpm
+              uses: pnpm/action-setup@v4
+              with:
+                  version: latest
+
+            - name: Set up Node.js
+              uses: actions/setup-node@v6
+              with:
+                  node-version: "lts/*"
+
+            - name: pnpm add
+              run: |
+                  cat > .npmrc <<EOT
+                  auto-install-peers=true
+                  node-linker=hoisted
+                  EOT
+                  pnpm add ./eslint-*-${{ needs.build-tarball.outputs.version }}.tgz -D
+
+    bun-install:
+        needs: build-tarball
+
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Download build artifact
+              uses: actions/download-artifact@v5
+              with:
+                  name: build
+
+            - name: Set up Bun
+              uses: oven-sh/setup-bun@v2
+
+            - name: bun install
+              run: |
+                  bun install ./eslint-*-${{ needs.build-tarball.outputs.version }}.tgz -D