Style check: fail a pull request on the mechanical style rules

.github/workflows/style.yml

@@ -0,0 +1,16 @@
+# The mechanical house-style rules: SPDX header, no Sphinx roles in
+# docstrings, no link to the .github repo from a page, no README badges or
+# status banner. Pull requests check the changed files; a manual run checks
+# every file. Paths that aren't ours go in .style-exclude.
+name: Style
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  style:
+    uses: PyDevices/.github/.github/workflows/reusable-style-check.yml@publishing-v20

ports/cpython/tests/test_callback_lifetime.py

@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2026 Brad Barnett
+#
 # SPDX-License-Identifier: MIT
 """Lifetime of Python callbacks registered with add_event_cb.
 

ports/cpython/tests/test_callback_references.py

@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2026 Brad Barnett
+#
 # SPDX-License-Identifier: MIT
 """References a callback trampoline holds while LVGL calls into Python.
 

ports/cpython/tests/test_free_threading.py

@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2026 Brad Barnett
+#
 # SPDX-License-Identifier: MIT
 """lvgl on a free-threaded Python (3.13t and later).
 

ports/cpython/tests/test_jpeg_decoder.py

@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2026 Brad Barnett
+#
 # SPDX-License-Identifier: MIT
 """JPEG images draw scaled and contained, as they do on MicroPython.
 

ports/cpython/tests/test_lvgl_init.py

@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2026 Brad Barnett
+#
 # SPDX-License-Identifier: MIT
 """Unit tests for the native lvgl CPython extension."""
 

ports/cpython/tests/test_runtime_references.py

@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2026 Brad Barnett
+#
 # SPDX-License-Identifier: MIT
 """Reference counts and buffer exports the runtime hands across to LVGL.
 

ports/cpython/tests/test_struct_callback_lifetime.py

@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2026 Brad Barnett
+#
 # SPDX-License-Identifier: MIT
 """Lifetime of Python callbacks set on animations and timers.