diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
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+++ b/.github/workflows/release.yml
@@ -0,0 +1,136 @@
+name: release
+
+# Builds sdist + wheel and publishes to PyPI on `v*` tags using PyPI Trusted
+# Publishing (OIDC) — no long-lived API token stored in this repo. On pull
+# requests the same build runs as a dry-run: build, `twine check`, install
+# the wheel into a throwaway venv, and import `Wave` from it. That dry-run
+# job never touches PyPI (no `id-token` permission, no publish step).
+#
+# One-time setup before the first `v*` tag: register this repo + workflow as
+# a Trusted Publisher on the `wave-sdk` PyPI project (see AGENTS.md / PR body
+# for the exact fields — this workflow cannot self-register).
+
+on:
+  pull_request:
+  push:
+    tags: ["v*"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: release-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    name: build + dry-run check
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        with:
+          persist-credentials: false
+
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+        with:
+          python-version: "3.12"
+
+      - name: Install build tooling
+        run: |
+          python -m pip install --upgrade pip
+          pip install build twine
+
+      - name: Build sdist + wheel
+        run: python -m build
+
+      - name: twine check
+        run: twine check dist/*
+
+      - name: Create fresh venv (no repo on sys.path)
+        run: python -m venv "$RUNNER_TEMP/dry-run"
+
+      - name: Install the built wheel
+        run: |
+          WHEEL=$(ls dist/*.whl)
+          "$RUNNER_TEMP/dry-run/bin/pip" install --upgrade pip
+          "$RUNNER_TEMP/dry-run/bin/pip" install "$WHEEL"
+
+      - name: Import check (installed wheel, run away from the repo)
+        working-directory: ${{ runner.temp }}/dry-run
+        run: |
+          bin/python -c "
+          from wave_sdk import Wave
+          import wave_sdk
+          print('wave_sdk', wave_sdk.__version__, 'imported OK from', wave_sdk.__file__)
+          print('Wave facade:', Wave)
+          "
+
+      - name: Upload dist
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        with:
+          name: dist
+          path: dist/
+          retention-days: 7
+
+  publish:
+    name: publish to PyPI
+    needs: build
+    if: startsWith(github.ref, 'refs/tags/v')
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    environment:
+      name: pypi
+      url: https://pypi.org/project/wave-sdk/
+    permissions:
+      # OIDC token for PyPI Trusted Publishing — no API token secret needed.
+      id-token: write
+      contents: read
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        with:
+          persist-credentials: false
+
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+        with:
+          python-version: "3.12"
+
+      - name: Install build tooling
+        run: |
+          python -m pip install --upgrade pip
+          pip install build
+
+      - name: Build sdist + wheel
+        run: python -m build
+
+      - name: Verify tag matches package version
+        run: |
+          TAG_VERSION="${GITHUB_REF_NAME#v}"
+          PKG_VERSION=$(python -c "import tomllib; print(tomllib.load(open('pyproject.toml','rb'))['project']['version'])")
+          if [ "$TAG_VERSION" != "$PKG_VERSION" ]; then
+            echo "tag v$TAG_VERSION does not match pyproject.toml version $PKG_VERSION"
+            exit 1
+          fi
+
+      - name: Publish to PyPI (Trusted Publishing, OIDC)
+        uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e # v1.13.0
+
+      - name: Post-publish verification (PyPI + fresh install)
+        run: |
+          TAG_VERSION="${GITHUB_REF_NAME#v}"
+          for i in 1 2 3 4 5 6 7 8; do
+            AVAILABLE=$(pip index versions wave-sdk 2>/dev/null | grep -o "$TAG_VERSION" || true)
+            if [ -n "$AVAILABLE" ]; then break; fi
+            echo "waiting for PyPI to index wave-sdk==$TAG_VERSION (attempt $i)"
+            sleep 15
+          done
+          python -m venv "$RUNNER_TEMP/verify"
+          "$RUNNER_TEMP/verify/bin/pip" install --upgrade pip
+          "$RUNNER_TEMP/verify/bin/pip" install "wave-sdk==$TAG_VERSION"
+          "$RUNNER_TEMP/verify/bin/python" -c "
+          from wave_sdk import Wave
+          import wave_sdk
+          assert wave_sdk.__version__ == '$TAG_VERSION', wave_sdk.__version__
+          print('verified wave-sdk', wave_sdk.__version__, 'installed from PyPI, Wave facade OK')
+          "