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+# Leaves a comment on a pull request with a link to test the changes in a WordPress Playground instance.
+name: OPTIONAL - Comment on a pull request with Playground details
+
+# Only trigger, when the build workflow succeeded
+on:
+    workflow_run:
+        workflows: ['Build Release Artifact']
+        types:
+            - completed
+jobs:
+    test_using_wordpress_playground:
+        name: Test using WordPress Playground
+        runs-on: ubuntu-latest
+        permissions:
+            pull-requests: write
+        if: ${{ github.repository == 'WordPress/gutenberg' || github.event_name == 'pull_request' }}
+        steps:
+            - name: Find Comment
+              uses: peter-evans/find-comment@v2
+              id: find-comment
+              with:
+                  issue-number: ${{ github.event.pull_request.number }}
+                  comment-author: 'github-actions[bot]'
+                  body-includes: '<!-- pr-test-using=wordpress-playground -->'
+
+            - name: Create comment
+              if: steps.find-comment.outputs.comment-id == ''
+              uses: peter-evans/create-or-update-comment@v3
+              with:
+                  issue-number: ${{ github.event.pull_request.number }}
+                  body: |
+                      <!-- pr-test-using=wordpress-playground -->
+                      ## Test using WordPress Playground
+
+                      :link: [Test this pull request with WordPress Playground](https://playground.wordpress.net/gutenberg.html?pr=${{ github.event.number }}).
+
+                      ### About WordPress playground
+
+                      [WordPress Playground](https://developer.wordpress.org/playground/) is an experimental project that creates a full WordPress instance entirely within the browser.
+
+                      #### Please note:
+
+                      - The Plugin and Theme Directories cannot be accessed within Playground.
+                      - **All changes will be lost** when when refreshing the page or closing the window/tab running a Playground instance.
+                      - A fresh instance is created each time the link below is clicked.
+                      - Every time this pull request is updated, a new ZIP file containing all changes is created. If your changes are not reflected in the Playground instance,
+                      it's possible that the most recent build failed, or has not completed. Check the [list of workflow runs to be sure](https://github.com/WordPress/gutenberg/actions/workflows/pull-request-playground-comment.yml).
+
+                      For more details about these limitations and more, check out [WordPress playground limitations](https://wordpress.github.io/wordpress-playground/limitations/) in the documentation.