diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
new file mode 100644
index 0000000..6697a0b
--- /dev/null
+++ b/.github/workflows/python.yml
@@ -0,0 +1,33 @@
+# This workflow will install Python dependencies, run tests and lint with a single version of Python
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
+
+name: Python
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v5
+    - name: Set up Python 3.13
+      uses: actions/setup-python@v3
+      with:
+        python-version: "3.13"
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install black pytest meshtastic
+    - name: Lint with black
+      run: |
+        black --check ./
+    - name: Test with pytest
+      run: |
+        pytest
diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 967749b..0b4ff0c 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -27,8 +27,10 @@ jobs:
         ruby-version: ${{ matrix.ruby-version }}
         bundler-cache: true
         working-directory: ./web
-    - name: Set up dependencies 
+    - name: Set up dependencies
       run: bundle install
+    - name: Run rufo
+      run: bundle exec rufo --check .
     - name: Run tests
       run: |
         mkdir -p tmp/test-results
diff --git a/data/mesh.py b/data/mesh.py
index 314d67b..8848d2c 100644
--- a/data/mesh.py
+++ b/data/mesh.py
@@ -45,7 +45,9 @@ def _post_json(path: str, payload: dict):
         return
     url = f"{INSTANCE}{path}"
     data = json.dumps(payload).encode("utf-8")
-    req = urllib.request.Request(url, data=data, headers={"Content-Type": "application/json"})
+    req = urllib.request.Request(
+        url, data=data, headers={"Content-Type": "application/json"}
+    )
     if API_TOKEN:
         req.add_header("Authorization", f"Bearer {API_TOKEN}")
     try:
@@ -290,13 +292,17 @@ def main():
             node_items = _node_items_snapshot(nodes)
             if node_items is None:
                 if DEBUG:
-                    print("[debug] skipping node snapshot; nodes changed during iteration")
+                    print(
+                        "[debug] skipping node snapshot; nodes changed during iteration"
+                    )
             else:
                 for node_id, n in node_items:
                     try:
                         upsert_node(node_id, n)
                     except Exception as e:
-                        print(f"[warn] failed to update node snapshot for {node_id}: {e}")
+                        print(
+                            f"[warn] failed to update node snapshot for {node_id}: {e}"
+                        )
                         if DEBUG:
                             print(f"[debug] node object: {n!r}")
         except Exception as e:
diff --git a/tests/test_mesh.py b/tests/test_mesh.py
index c61f433..1915d8f 100644
--- a/tests/test_mesh.py
+++ b/tests/test_mesh.py
@@ -30,7 +30,9 @@ def mesh_module(monkeypatch):
     meshtastic_mod.serial_interface = serial_interface_mod
 
     monkeypatch.setitem(sys.modules, "meshtastic", meshtastic_mod)
-    monkeypatch.setitem(sys.modules, "meshtastic.serial_interface", serial_interface_mod)
+    monkeypatch.setitem(
+        sys.modules, "meshtastic.serial_interface", serial_interface_mod
+    )
 
     # Stub pubsub.pub
     pubsub_mod = types.ModuleType("pubsub")
@@ -121,7 +123,9 @@ def test_node_to_dict_handles_nested_structures(mesh_module):
 def test_store_packet_dict_posts_text_message(mesh_module, monkeypatch):
     mesh = mesh_module
     captured = []
-    monkeypatch.setattr(mesh, "_post_json", lambda path, payload: captured.append((path, payload)))
+    monkeypatch.setattr(
+        mesh, "_post_json", lambda path, payload: captured.append((path, payload))
+    )
 
     packet = {
         "id": 123,
@@ -160,7 +164,9 @@ def test_store_packet_dict_posts_text_message(mesh_module, monkeypatch):
 def test_store_packet_dict_ignores_non_text(mesh_module, monkeypatch):
     mesh = mesh_module
     captured = []
-    monkeypatch.setattr(mesh, "_post_json", lambda *args, **kwargs: captured.append(args))
+    monkeypatch.setattr(
+        mesh, "_post_json", lambda *args, **kwargs: captured.append(args)
+    )
 
     packet = {
         "id": 456,
diff --git a/web/app.rb b/web/app.rb
index d3a9717..2bed0eb 100644
--- a/web/app.rb
+++ b/web/app.rb
@@ -28,7 +28,7 @@ set :views, File.join(__dir__, "views")
 
 SITE_NAME = ENV.fetch("SITE_NAME", "Meshtastic Berlin")
 DEFAULT_CHANNEL = ENV.fetch("DEFAULT_CHANNEL", "#MediumFast")
-DEFAULT_FREQUENCY= ENV.fetch("DEFAULT_FREQUENCY", "868MHz")
+DEFAULT_FREQUENCY = ENV.fetch("DEFAULT_FREQUENCY", "868MHz")
 MAP_CENTER_LAT = ENV.fetch("MAP_CENTER_LAT", "52.502889").to_f
 MAP_CENTER_LON = ENV.fetch("MAP_CENTER_LON", "13.404194").to_f
 MAX_NODE_DISTANCE_KM = ENV.fetch("MAX_NODE_DISTANCE_KM", "137").to_f
@@ -290,12 +290,12 @@ end
 
 get "/" do
   erb :index, locals: {
-    site_name: SITE_NAME,
-    default_channel: DEFAULT_CHANNEL,
-    default_frequency: DEFAULT_FREQUENCY,
-    map_center_lat: MAP_CENTER_LAT,
-    map_center_lon: MAP_CENTER_LON,
-    max_node_distance_km: MAX_NODE_DISTANCE_KM,
-    matrix_room: MATRIX_ROOM
-  }
+                site_name: SITE_NAME,
+                default_channel: DEFAULT_CHANNEL,
+                default_frequency: DEFAULT_FREQUENCY,
+                map_center_lat: MAP_CENTER_LAT,
+                map_center_lon: MAP_CENTER_LON,
+                max_node_distance_km: MAX_NODE_DISTANCE_KM,
+                matrix_room: MATRIX_ROOM,
+              }
 end