diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 05a512c..a501d58 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -109,7 +109,6 @@ jobs:
       - uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1
         with:
           node-version: 24.x
-          registry-url: 'https://registry.npmjs.org'
           cache: 'npm'
           cache-dependency-path: package-lock.json
       - run: npm ci
@@ -120,5 +119,14 @@ jobs:
         with:
           name: npm-package
           path: artifacts
+      - name: Show npm auth configuration
+        run: |
+          echo "registry: $(npm config get registry)"
+          echo "userconfig: ${NPM_CONFIG_USERCONFIG:-<none>}"
+          if [ -n "${NPM_CONFIG_USERCONFIG:-}" ] && [ -f "$NPM_CONFIG_USERCONFIG" ]; then
+            sed 's/\(_authToken=\).*/\1<redacted>/' "$NPM_CONFIG_USERCONFIG"
+          fi
+          echo "ACTIONS_ID_TOKEN_REQUEST_URL set: ${ACTIONS_ID_TOKEN_REQUEST_URL:+yes}"
+          echo "ACTIONS_ID_TOKEN_REQUEST_TOKEN set: ${ACTIONS_ID_TOKEN_REQUEST_TOKEN:+yes}"
       - name: Publish to npm (trusted publishing)
         run: npm publish ./artifacts/*.tgz --provenance