diff --git a/.github/workflows/nightly-build.yml b/.github/workflows/nightly-build.yml
new file mode 100644
index 000000000..678792cf0
--- /dev/null
+++ b/.github/workflows/nightly-build.yml
@@ -0,0 +1,62 @@
+name: Nightly Build and Publish
+
+on:
+  pull_request:
+    types:
+      - closed
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  nightly_bump_and_publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          enable-cache: true
+          cache-dependency-glob: uv.lock
+      - name: Set up Python
+        run: uv python install 3.12
+      - name: Check for changes on main
+        id: changes
+        run: |
+          git fetch origin main
+          git log --since="24 hours ago" origin/main --oneline > changes.txt
+          if [ -s changes.txt ]; then echo "changed=true" >> $GITHUB_OUTPUT; else echo "changed=false" >> $GITHUB_OUTPUT; fi
+      - name: Bump patch version
+        if: steps.changes.outputs.changed == 'true'
+        run: |
+          python -c "
+          import toml
+          import re
+          
+          # Read current version
+          with open('pyproject.toml', 'r') as f:
+              data = toml.load(f)
+          
+          current_version = data['project']['version']
+          major, minor, patch = map(int, current_version.split('.'))
+          
+          # Bump patch version
+          new_version = f'{major}.{minor}.{patch + 1}'
+          data['project']['version'] = new_version
+          
+          # Write back
+          with open('pyproject.toml', 'w') as f:
+              toml.dump(data, f)
+          
+          print(f'Bumped version from {current_version} to {new_version}')
+          "
+          git config user.name "github-actions"
+          git config user.email "github-actions@github.com"
+          git add pyproject.toml
+          git commit -m "ci: nightly patch bump"
+          git push
+      - name: Build
+        if: steps.changes.outputs.changed == 'true'
+        run: uv build
+      - name: Publish to TestPyPI
+        if: steps.changes.outputs.changed == 'true'
+        run: uv publish --repository testpypi
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