Temporary smoke test for Copilot CLI GITHUB_TOKEN auth

Author: trask

.github/workflows/copilot-token-smoke-test.yml

@@ -0,0 +1,36 @@
+name: Copilot CLI token smoke test
+
+on:
+  push:
+    branches:
+      - test/copilot-token-smoke
+
+permissions: {}
+
+jobs:
+  smoke:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      copilot-requests: write
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
+        with:
+          node-version: 24
+          package-manager-cache: false
+
+      - name: Install Copilot CLI
+        run: |
+          npm ci --prefix .github/scripts/pull-request-dashboard
+          echo "$GITHUB_WORKSPACE/.github/scripts/pull-request-dashboard/node_modules/.bin" >> "$GITHUB_PATH"
+
+      - name: Run Copilot with GITHUB_TOKEN
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          set -euo pipefail
+          copilot -p 'Reply with exactly: OK' --model gpt-5.4-mini --silent