diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..e0fa534
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,55 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+permissions:
+  contents: read
+
+jobs:
+  smoke-test:
+    name: Smoke Tests
+    runs-on: ubuntu-24.04
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v5
+    
+    - name: Run software installer in Docker
+      run: |
+        docker run --rm --privileged \
+          -v $PWD:/workspace -w /workspace \
+          -v /var/run/docker.sock:/var/run/docker.sock \
+          ubuntu:24.04 \
+          bash -c "apt-get update && apt-get install -y sudo docker.io && \
+                   useradd -m -s /bin/bash testuser && \
+                   usermod -aG sudo testuser && \
+                   usermod -aG docker testuser && \
+                   echo 'testuser ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers && \
+                   chown -R testuser:testuser /workspace && \
+                   su - testuser -c 'cd /workspace && ./src/installer/install.sh'"
+    
+    - name: Run software upgrade in Docker
+      run: |
+        docker run --rm --privileged \
+          -v $PWD:/workspace -w /workspace \
+          -v /var/run/docker.sock:/var/run/docker.sock \
+          ubuntu:24.04 \
+          bash -c "apt-get update && apt-get install -y sudo docker.io && \
+                   useradd -m -s /bin/bash testuser && \
+                   usermod -aG sudo testuser && \
+                   usermod -aG docker testuser && \
+                   echo 'testuser ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers && \
+                   chown -R testuser:testuser /workspace && \
+                   su - testuser -c 'cd /workspace && ./src/installer/upgrade.sh'"
+    
+    - name: Run dotfiles installer in Docker
+      run: |
+        docker run --rm -v $PWD:/workspace -w /workspace \
+          ubuntu:24.04 \
+          bash -c "useradd -m -s /bin/bash testuser && \
+                   chown -R testuser:testuser /workspace && \
+                   su - testuser -c 'cd /workspace && ./src/dotfiles/install.sh'"