diff --git a/action.yml b/action.yml
index 6662212..56f091b 100644
--- a/action.yml
+++ b/action.yml
@@ -36,6 +36,20 @@ runs:
       env:
         YARN_NPM_AUTH_TOKEN: ${{ inputs.npm-token }}
         PUBLISH_NPM_TAG: ${{ inputs.npm-tag }}
+    - id: install-pkdiff
+      shell: bash
+      run: npm i -g pkdiff
+    - id: generate-report
+      shell: bash
+      if: inputs.npm-token == ''
+      run: ${{ github.action_path }}/scripts/report.sh
+    - id: upload-artifact
+      if: inputs.npm-token == ''
+      uses: actions/upload-artifact@v4
+      with:
+        path: |
+          /tmp/*.tgz
+          /tmp/*.html
     - id: name-version
       shell: bash
       if: inputs.slack-webhook-url != ''
diff --git a/scripts/publish.sh b/scripts/publish.sh
index 77b8c29..31aa957 100755
--- a/scripts/publish.sh
+++ b/scripts/publish.sh
@@ -5,8 +5,8 @@ set -e
 set -o pipefail
 
 if [[ -z $YARN_NPM_AUTH_TOKEN ]]; then
-  echo "Notice: 'npm-token' not set. Running 'yarn pack --dry-run'."
-  yarn pack --dry-run
+  echo "Notice: 'npm-token' not set. Running 'yarn pack'."
+  yarn pack --out /tmp/%s-%v.tgz
   exit 0
 fi
 
diff --git a/scripts/report.sh b/scripts/report.sh
new file mode 100755
index 0000000..be2e144
--- /dev/null
+++ b/scripts/report.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -x
+set -e
+set -o pipefail
+
+directory="/tmp"
+
+for file in "$directory"/*.tgz; do
+    if [ -f "$file" ]; then
+        echo "Processing $file"
+        basename=$(basename "$file")
+        name="${basename%-*}"
+        name_with_slash="${name/-//}"
+        echo "$name_with_slash"
+        pkdiff "$name_with_slash@latest" "$file" \
+            --no-exit-code \
+            --no-open \
+            --output "$directory/$basename.html"
+    fi
+done