chore: import upstream snapshot with attribution

.github/workflows/sdk-smoke.yml

@@ -0,0 +1,50 @@
+name: SDK smoke
+
+# End-to-end smoke for both SDKs on all three OSes. The runners have no officecli
+# on PATH, so create() exercises the FULL auto-install path — install.sh on
+# unix, install.ps1 (irm | iex via PowerShell) on Windows — then a real pipe
+# round-trip. This is the only place the Windows installer path is exercised, and
+# it runs against the SDK source directly (no bundled dependency installed), so
+# the install.sh/install.ps1 fallback is what gets tested.
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'sdk/**'
+      - '.github/workflows/sdk-smoke.yml'
+  pull_request:
+    paths:
+      - 'sdk/**'
+      - '.github/workflows/sdk-smoke.yml'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  smoke:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    defaults:
+      run:
+        shell: bash
+    steps:
+      - uses: actions/checkout@v5
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '20'
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Node SDK auto-install + round-trip
+        run: node sdk/node/smoke.js
+
+      - name: Python SDK auto-install + round-trip
+        run: python sdk/python/smoke.py