diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 000000000..8302a9f31
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,11 @@
+
+<!-- 
+Please format codes by ruff before pull request.
+
+For example:
+    $ pip install -r ./requirements_dev.txt
+    $ make style
+
+To test:
+    $ make test
+-->
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 000000000..fb3e520ad
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,41 @@
+---
+name: CI
+on:
+  push:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+
+jobs:
+  ci:
+    strategy:
+      matrix:
+        python-version: ["3.11"]
+        os: [ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Create venv
+        run: |
+          python3 -m venv .venv
+
+      - name: Load cached venv
+        id: cached-poetry-dependencies
+        uses: actions/cache@v3
+        with:
+          path: .venv
+          key: venv-${{ runner.os }}-${{ matrix.python-version }}-${{ hashFiles('requirements_dev.txt') }}
+
+      - name: Install dependencies
+        run: .venv/bin/pip install -r ./requirements_dev.txt
+
+      - name: Test
+        run: |
+          . .venv/bin/activate
+          make test
diff --git a/Makefile b/Makefile
new file mode 100644
index 000000000..51265ad1a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,17 @@
+.PHONY: all
+all:
+
+.PHONY: style
+style: 
+	ruff format --respect-gitignore
+
+.PHONY: test_style
+test_style:
+	ruff format --respect-gitignore --check
+
+.PHONY: test
+test: test_style
+
+
+.DELETE_ON_ERROR:
+SHELL=/bin/bash
diff --git a/requirements_dev.txt b/requirements_dev.txt
new file mode 100644
index 000000000..e43c0da30
--- /dev/null
+++ b/requirements_dev.txt
@@ -0,0 +1 @@
+ruff==0.3.4