diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
new file mode 100644
index 0000000..1400fb0
--- /dev/null
+++ b/.github/workflows/actionlint.yml
@@ -0,0 +1,23 @@
+name: 'Actionlint'
+on:
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: 'read'
+  pull-requests: 'write'
+
+concurrency:
+  group: 'actionlint-${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}'
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    runs-on: 'ubuntu-latest'
+    steps:
+      - uses: 'actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd' # ratchet:actions/checkout@v6
+      - name: 'Run actionlint with reviewdog'
+        uses: 'reviewdog/action-actionlint@6fb7acc99f4a1008869fa8a0f09cfca740837d9d' # ratchet:reviewdog/action-actionlint@v1.72.0
+        with:
+          fail_level: 'error'
+          reporter: 'github-pr-check'
diff --git a/.github/workflows/centralized-stale.yml b/.github/workflows/centralized-stale.yml
new file mode 100644
index 0000000..54a727c
--- /dev/null
+++ b/.github/workflows/centralized-stale.yml
@@ -0,0 +1,101 @@
+name: 'Centralized Organization Stale Bot'
+permissions: {}
+on:
+  schedule:
+    # Run daily at 01:00 UTC
+    - cron: '0 1 * * *'
+  workflow_dispatch:
+
+jobs:
+  # Stage 1: Query the organization for all active repositories
+  fetch-repositories:
+    runs-on: 'ubuntu-latest'
+    outputs:
+      matrix: '${{ steps.set-matrix.outputs.repos }}'
+    steps:
+      - id: 'auth-minty'
+        name: 'Authenticate to Google Cloud'
+        uses: 'google-github-actions/auth@6fc4af4b145ae7821d527454aa9bd537d1f2dc5f' # ratchet:google-github-actions/auth@v2
+        with:
+          create_credentials_file: false
+          export_environment_variables: false
+          workload_identity_provider: '${{ vars.TOKEN_MINTER_WIF_PROVIDER }}'
+          service_account: '${{ vars.TOKEN_MINTER_WIF_SERVICE_ACCOUNT }}'
+          token_format: 'id_token'
+          id_token_audience: '${{ vars.TOKEN_MINTER_SERVICE_AUDIENCE }}'
+          id_token_include_email: true
+
+      - id: 'mint-github-token'
+        uses: 'abcxyz/github-token-minter/.github/actions/minty@45c29ca3418ff3bb3ad5815d88a80536efeba21b' # ratchet:abcxyz/github-token-minter/.github/actions/minty@main
+        with:
+          id_token: '${{ steps.auth-minty.outputs.id_token }}'
+          service_url: '${{ vars.TOKEN_MINTER_SERVICE_URL }}'
+          requested_permissions: |-
+            {
+              "scope": "stale-bot",
+              "repositories": ["*"],
+              "org_name": "google-github-actions"
+            }
+
+      - name: 'List active repositories'
+        id: set-matrix
+        env:
+          GH_TOKEN: '${{ steps.mint-github-token.outputs.token }}'
+        run: |
+          # Query GitHub API for active, public, non-forked repositories and force single-line JSON to prevent GITHUB_OUTPUT truncation
+          REPOS=$(gh api --paginate /orgs/google-github-actions/repos -q '[.[] | select(.archived == false and .private == false and .fork == false) | .name]' | jq -c .)
+          echo "repos=${REPOS}" >> "$GITHUB_OUTPUT"
+
+  # Stage 2: Fan out official actions/stale across all discovered repositories
+  apply-stale-rules:
+    needs: fetch-repositories
+    runs-on: 'ubuntu-latest'
+    strategy:
+      fail-fast: false
+      matrix:
+        repo: '${{ fromJson(needs.fetch-repositories.outputs.matrix) }}'
+
+    steps:
+      - id: 'auth-minty'
+        name: 'Authenticate to Google Cloud'
+        uses: 'google-github-actions/auth@6fc4af4b145ae7821d527454aa9bd537d1f2dc5f' # ratchet:google-github-actions/auth@v2
+        with:
+          create_credentials_file: false
+          export_environment_variables: false
+          workload_identity_provider: '${{ vars.TOKEN_MINTER_WIF_PROVIDER }}'
+          service_account: '${{ vars.TOKEN_MINTER_WIF_SERVICE_ACCOUNT }}'
+          token_format: 'id_token'
+          id_token_audience: '${{ vars.TOKEN_MINTER_SERVICE_AUDIENCE }}'
+          id_token_include_email: true
+
+      - id: 'mint-github-token'
+        uses: 'abcxyz/github-token-minter/.github/actions/minty@45c29ca3418ff3bb3ad5815d88a80536efeba21b' # ratchet:abcxyz/github-token-minter/.github/actions/minty@main
+        with:
+          id_token: '${{ steps.auth-minty.outputs.id_token }}'
+          service_url: '${{ vars.TOKEN_MINTER_SERVICE_URL }}'
+          requested_permissions: |-
+            {
+              "scope": "stale-bot",
+              "repositories": ["${{ matrix.repo }}"],
+              "org_name": "google-github-actions"
+            }
+
+      - name: 'Run official stale bot'
+        uses: 'actions/stale@b5d41d4e1d5dceea10e7104786b73624c18a190f' # ratchet:actions/stale@v10.2.0
+        env:
+          GITHUB_REPOSITORY: 'google-github-actions/${{ matrix.repo }}'
+        with:
+          repo-token: '${{ steps.mint-github-token.outputs.token }}'
+          operations-per-run: 300 # Increased burndown limit for first execution
+
+          # Issue configuration (60 days total: 53 inactive + 7 warning)
+          days-before-issue-stale: 53
+          days-before-issue-close: 7
+          stale-issue-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs.'
+          stale-issue-label: 'stale'
+
+          # PR configuration (30 days total: 23 inactive + 7 warning)
+          days-before-pr-stale: 23
+          days-before-pr-close: 7
+          stale-pr-message: 'This pull request has been automatically marked as stale because it has not had recent activity. Please leave a comment to remove this status.'
+          stale-pr-label: 'stale'
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
new file mode 100644
index 0000000..2332f5d
--- /dev/null
+++ b/.github/workflows/scorecard.yml
@@ -0,0 +1,31 @@
+name: 'Scorecard'
+on:
+  pull_request:
+  workflow_dispatch:
+
+permissions: 'read-all'
+
+jobs:
+  analyze:
+    runs-on: 'ubuntu-latest'
+    permissions:
+      contents: 'read'
+      security-events: 'write'
+      id-token: 'write'
+    timeout-minutes: 20
+    steps:
+    - uses: 'actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd' # ratchet:actions/checkout@v6
+      with:
+        # Checkout the base repository ref, not the PR's head commit
+        ref: '${{ github.event.pull_request.base.sha }}'
+        persist-credentials: false
+    - name: 'Run Scorecard'
+      uses: 'ossf/scorecard-action@4eaacf0543bb3f2c246792bd56e8cdeffafb205a' # ratchet:ossf/scorecard-action@v2.4.3
+      with:
+        results_file: 'results.sarif'
+        results_format: 'sarif'
+        publish_results: false
+    - name: 'Upload to GitHub Security Tab'
+      uses: 'github/codeql-action/upload-sarif@c10b8064de6f491fea524254123dbe5e09572f13' # ratchet:github/codeql-action/upload-sarif@v4.35.1
+      with:
+        sarif_file: 'results.sarif'