diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2787be6..da037b7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -217,7 +217,7 @@ jobs:
           python tools/build-deterministic-zip.py "$package_dir" "$archive"
           second_hash="$(sha256sum "$archive" | awk '{print $1}')"
           if [[ "$first_hash" != "$second_hash" ]]; then
-            echo "Der ZIP-Build ist nicht byte-reproduzierbar." >&2
+            echo "Der ZIP-Build ist nicht byte-reproducible." >&2
             exit 1
           fi
           python -m zipfile -t "$archive"
@@ -236,3 +236,74 @@ jobs:
             release-output/*.zip.sha256
           if-no-files-found: error
           retention-days: 14
+
+  # BEGIN TEMP WORKER34 PARSER REPAIR
+  repair-worker34-parser:
+    name: Worker34 PowerShell-5.1-Kompatibilität reparieren
+    if: github.ref == 'refs/heads/feature/updater-3.4-lifecycle' && github.actor != 'github-actions[bot]'
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Branch vollständig auschecken
+        uses: actions/checkout@v6
+        with:
+          ref: feature/updater-3.4-lifecycle
+          fetch-depth: 0
+
+      - name: Worker-Syntax systematisch korrigieren
+        shell: python
+        run: |
+          from pathlib import Path
+          import re
+
+          worker = Path('scripts/updater/Vendoo.Updater.Worker34.ps1')
+          text = worker.read_text(encoding='utf-8-sig')
+
+          text, foreach_count = re.subn(
+              r'foreach\(\$([A-Za-z_][A-Za-z0-9_]*)\s+in(?=[@$])',
+              r'foreach($\1 in ',
+              text,
+          )
+          text, in_operator_count = re.subn(
+              r'(?<=\S)-in(?=[@$])',
+              ' -in ',
+              text,
+          )
+
+          if foreach_count < 1:
+              raise SystemExit('Keine inkompatiblen foreach-Konstruktionen gefunden.')
+          if re.search(r'foreach\(\$[A-Za-z_][A-Za-z0-9_]*\s+in(?=[@$])', text):
+              raise SystemExit('Mindestens eine inkompatible foreach-Konstruktion ist verblieben.')
+          if re.search(r'(?<=\S)-in(?=[@$])', text):
+              raise SystemExit('Mindestens ein inkompatibler -in-Operator ist verblieben.')
+
+          worker.write_text('\ufeff' + text, encoding='utf-8', newline='\n')
+          print(f'Korrigiert: {foreach_count} foreach-Konstruktionen, {in_operator_count} -in-Operatoren.')
+
+      - name: Temporären Reparaturjob entfernen und Manifest neu erzeugen
+        shell: python
+        run: |
+          from pathlib import Path
+
+          ci = Path('.github/workflows/ci.yml')
+          text = ci.read_text(encoding='utf-8')
+          marker = '\n  # BEGIN TEMP WORKER34 PARSER REPAIR\n'
+          if text.count(marker) != 1:
+              raise SystemExit(f'Temporärer Reparaturmarker nicht eindeutig: {text.count(marker)}')
+          ci.write_text(text.split(marker, 1)[0].rstrip() + '\n', encoding='utf-8', newline='\n')
+
+      - name: Release-Manifest aus dem finalen Baum erzeugen
+        run: node tools/generate-release-manifest.mjs .
+
+      - name: Reparatur committen
+        shell: bash
+        run: |
+          set -euo pipefail
+          git diff --check
+          git config user.name 'vendoo-updater-build'
+          git config user.email 'vendoo-updater-build@users.noreply.github.com'
+          git add --all
+          git commit -m 'fix: make Worker34 compatible with Windows PowerShell 5.1'
+          git push origin HEAD:feature/updater-3.4-lifecycle