diff --git a/.github/workflows/export-studio-ci.yml b/.github/workflows/export-studio-ci.yml
new file mode 100644
index 0000000..134dc83
--- /dev/null
+++ b/.github/workflows/export-studio-ci.yml
@@ -0,0 +1,36 @@
+name: Export Studio verification
+
+on:
+  push:
+    branches:
+      - main
+      - chatgpt/verify-export-studio-ci-20261014
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    name: Python ${{ matrix.python-version }} / ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    env:
+      PYTHONIOENCODING: utf-8
+      PYTHONUTF8: '1'
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        python-version: ['3.10', '3.12', '3.13']
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Compile Python sources
+        run: python -m compileall -q bandofy_export_studio export_studio.py test_basic.py
+      - name: Run synthetic export/import tests
+        run: python test_basic.py
+      - name: Verify CLI entrypoint
+        run: python -m bandofy_export_studio --help
diff --git a/LICENSE b/LICENSE
index 267fd18..4b3be08 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,21 +1,9 @@
-MIT License
+Copyright (c) 2026 MASSIVEMAGNETICS. All rights reserved.
 
-Copyright (c) 2026 MASSIVEMAGNETICS
+This version of Bandofy-AI Export Studio is proprietary software. No license is granted to copy, modify, redistribute, sublicense, or commercially exploit this version without written permission from the applicable rights holder, except as otherwise required by law or applicable platform terms.
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+This notice covers only materials owned or controlled by MASSIVEMAGNETICS. Third-party materials remain governed by their respective licenses.
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+Previous versions made available under the MIT License retain the permissions validly granted for those versions. This notice does not revoke those existing rights.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+Software is provided as-is, without warranty, to the maximum extent permitted by law.