diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..8c3ea2f
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,67 @@
+name: Publish distributions
+
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: Build and inspect distributions
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
+      - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
+        with:
+          python-version: "3.13"
+      - name: Install build tools
+        run: python -m pip install --disable-pip-version-check "build==1.3.0" "twine==6.2.0"
+      - name: Build wheel and source distribution
+        run: python -m build
+      - name: Check package metadata
+        run: python -m twine check --strict dist/*
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
+        with:
+          name: python-package-distributions
+          path: dist/
+
+  publish-testpypi:
+    name: Publish to TestPyPI
+    if: github.event_name == 'workflow_dispatch'
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: testpypi
+      url: https://test.pypi.org/p/codex-profile-sync
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
+        with:
+          name: python-package-distributions
+          path: dist/
+      - name: Publish distributions to TestPyPI
+        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # v1.14.2
+        with:
+          repository-url: https://test.pypi.org/legacy/
+
+  publish-pypi:
+    name: Publish to PyPI
+    if: github.event_name == 'release' && github.event.action == 'published'
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/codex-profile-sync
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
+        with:
+          name: python-package-distributions
+          path: dist/
+      - name: Publish distributions to PyPI
+        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # v1.14.2