diff --git a/.github/workflows/sync-updater34-feature-manifest.yml b/.github/workflows/sync-updater34-feature-manifest.yml
new file mode 100644
index 0000000..62547d3
--- /dev/null
+++ b/.github/workflows/sync-updater34-feature-manifest.yml
@@ -0,0 +1,41 @@
+name: Sync Updater 3.4 Feature Manifest
+
+on:
+  push:
+    branches:
+      - feature/updater-3.4-lifecycle
+
+permissions:
+  contents: write
+
+concurrency:
+  group: sync-updater-34-feature-manifest
+  cancel-in-progress: false
+
+jobs:
+  sync:
+    if: ${{ github.actor != 'github-actions[bot]' }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          ref: feature/updater-3.4-lifecycle
+          fetch-depth: 0
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22.x'
+
+      - name: Manifest aus dem vollständigen Branch erzeugen
+        run: node tools/generate-release-manifest.mjs .
+
+      - name: Manifest committen und temporären Workflow entfernen
+        shell: bash
+        run: |
+          set -euo pipefail
+          rm -f .github/workflows/sync-updater34-feature-manifest.yml
+          git config user.name 'vendoo-release-bot'
+          git config user.email 'vendoo-release-bot@users.noreply.github.com'
+          git add --all
+          git commit -m 'chore: synchronize updater 3.4 release manifest'
+          git push origin HEAD:feature/updater-3.4-lifecycle