diff --git a/.gitea/workflows/sync-to-svn.yaml b/.gitea/workflows/sync-to-svn.yaml
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+# Gitea Actions – Sync git repository to SVN
+# Equivalent of .circleci/config.yml, translated to GitHub Actions syntax
+# which Gitea Actions supports natively.
+#
+# Prerequisites (set as repository Secrets in Gitea → Settings → Secrets):
+#   SVN_USERNAME  – SVN commit username
+#   SVN_PASSWORD  – SVN commit password
+#   SVN_REPO_URL  – Base SVN repo URL (e.g. https://svn.example.com/repos/myproject)
+
+name: Sync to SVN
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  push-to-svn:
+    runs-on: self-hosted
+
+    steps:
+      - name: Checkout git repository
+        uses: actions/checkout@v4
+
+      # SVN and rsync are pre-installed in the container image, but the
+      # apt-get call is kept so the workflow works on a stock runner too.
+      - name: Install SVN and rsync
+        run: |
+          if ! command -v svn &>/dev/null || ! command -v rsync &>/dev/null; then
+            sudo apt-get update -qq && sudo apt-get install -y subversion rsync
+          fi
+
+      - name: Verify SVN credentials are set
+        run: |
+          if [ -z "${{ secrets.SVN_USERNAME }}" ]; then echo "ERROR: SVN_USERNAME secret is not set" && exit 1; fi
+          if [ -z "${{ secrets.SVN_PASSWORD }}" ]; then echo "ERROR: SVN_PASSWORD secret is not set" && exit 1; fi
+          if [ -z "${{ secrets.SVN_REPO_URL }}" ];  then echo "ERROR: SVN_REPO_URL secret is not set"  && exit 1; fi
+          echo "All SVN secrets are set."
+
+      - name: Checkout SVN branch
+        run: |
+          svn checkout \
+            --username "${{ secrets.SVN_USERNAME }}" \
+            --password "${{ secrets.SVN_PASSWORD }}" \
+            --no-auth-cache \
+            --non-interactive \
+            --trust-server-cert \
+            "${{ secrets.SVN_REPO_URL }}/branches/data-export-api-copy" svn-branch
+
+      - name: Sync files to SVN working copy
+        run: |
+          rsync -a --delete \
+            --exclude='.git/' \
+            --exclude='.gitea/' \
+            --exclude='.svn/' \
+            --exclude='svn-branch/' \
+            . svn-branch/
+      - name: Stage and commit to SVN
+        run: |
+          cd svn-branch
+
+          # Add all new/unversioned files and directories in one pass
+          svn add --force .
+
+          # Delete files removed from git (handles paths with spaces).
+          # '|| true' prevents pipefail aborting when grep finds no '!' lines.
+          svn status | grep '^!' | while IFS= read -r line; do
+            svn delete "${line:8}@"
+          done || true
+
+          # Attempt commit; svn commit exits 0 silently when nothing changed
+          svn commit \
+            --username "${{ secrets.SVN_USERNAME }}" \
+            --password "${{ secrets.SVN_PASSWORD }}" \
+            --no-auth-cache \
+            --non-interactive \
+            --trust-server-cert \
+            -m "Gitea CI sync from commit ${{ github.sha }} [ci skip]"
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