diff --git a/.github/workflows/formatter.yml b/.github/workflows/formatter.yml
new file mode 100644
index 0000000..6b37756
--- /dev/null
+++ b/.github/workflows/formatter.yml
@@ -0,0 +1,23 @@
+name: Python Formatter (isort & black)
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  formatting:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.9'
+      - name: Install isort and black
+        run: |
+          python -m pip install --upgrade pip
+          pip install isort black
+      - name: Run isort and black
+        run: |
+          isort -c .
+          black --check .
diff --git a/pyproject.toml b/pyproject.toml
index 01a2b9a..d78f6bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,11 @@
 [build-system]
 requires = ["setuptools>=67.0"]
 build-backend = "setuptools.build_meta"
+
+[tool.isort]
+line_length = 120
+multi_line_output = 1
+include_trailing_comma = true
+
+[tool.black]
+line_length = 120