add steps to auto-post comments

.github/workflows/new_release_issue.yml

@@ -32,6 +32,7 @@ jobs:
 
       - name: Create new release issue
         if: success()
+        id: created-issue
         uses: JasonEtco/create-an-issue@v2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -41,3 +42,53 @@ jobs:
         with:
           update_existing: true
           search_existing: true
+
+      - name: Get comments from last release
+        if: success()
+        id: get_pr_comments
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const prs = await github.rest.pulls.list({
+              owner: 'primer',
+              repo: 'brand',
+              state: 'closed',
+              sort: 'updated',
+              direction: 'desc',
+              per_page: 1,
+              head: 'changeset-release/main'
+            });
+            if (prs.data.length === 0) {
+              core.setFailed('No closed PR found with branch changeset-release/main.');
+            } else {
+              const pr = prs.data[0];
+              console.log('Found PR:', pr);
+              const comments = await github.rest.issues.listComments({
+                owner: 'primer',
+                repo: 'brand',
+                issue_number: pr.number
+              });
+              const filteredComments = comments.data.filter(comment => comment.user.login !== 'github-actions');
+              console.log('Filtered comments:', filteredComments);
+              core.setOutput('comments', JSON.stringify(filteredComments));
+            }
+
+      - name: Post comments to issue
+        if: success()
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const comments = JSON.parse('${{ steps.get_pr_comments.outputs.comments }}');
+            const issue_number = ${{ steps.created-issue.outputs.number }};
+            console.log('Posting comments to issue number:', issue_number);
+            for (const comment of comments) {
+              console.log('Posting comment:', comment.body);
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: issue_number,
+                body: comment.body
+              });
+            }