chore: allow CI auto-sync of registry using GITHUB_TOKEN

.github/workflows/ci.yml

@@ -34,6 +34,27 @@ jobs:
         run: |
           python3 scripts/update_readme.py
 
+      - name: Set up GitHub credentials (for auto-sync)
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        run: |
+          git config --global user.name 'github-actions[bot]'
+          git config --global user.email 'github-actions[bot]@users.noreply.github.com'
+          git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git
+
+      - name: Auto-commit registry drift (main only)
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        run: |
+          # Se non ci sono cambi, esci senza errore
+          git diff --quiet && exit 0
+
+          git add README.md skills_index.json || true
+
+          # Se non c'è niente da committare, esci senza errore
+          git diff --cached --quiet && exit 0
+
+          git commit -m "chore: sync generated registry files [ci skip]"
+          git push origin HEAD
+
       - name: 🚨 Check for Uncommitted Drift
         run: |
           if ! git diff --quiet; then