Improve CI commenter

.github/workflows/monitor-ci.yml

@@ -19,6 +19,7 @@ jobs:
     steps:
     - name: Check CI Status
       uses: actions/github-script@v7
+      id: check-status
       with:
         script: |
           const workflow_run = context.payload.workflow_run;
@@ -59,10 +60,30 @@ jobs:
               }
             }
             
-            await github.rest.issues.createComment({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              issue_number: pr.number,
-              body: comment
-            });
-          }
+            // Store comment body for next step
+            core.setOutput('comment_body', comment);
+            core.setOutput('pr_number', pr.number.toString());
+            core.setOutput('should_comment', 'true');
+          } else {
+            core.setOutput('should_comment', 'false');
+          }
+    
+    - name: Find Comment
+      if: steps.check-status.outputs.should_comment == 'true'
+      uses: peter-evans/find-comment@v3
+      id: fc
+      with:
+        issue-number: ${{ steps.check-status.outputs.pr_number }}
+        comment-author: 'github-actions[bot]'
+        body-includes: '<!-- vibetunnel-ci-status -->'
+    
+    - name: Create or Update Comment
+      if: steps.check-status.outputs.should_comment == 'true'
+      uses: peter-evans/create-or-update-comment@v4
+      with:
+        comment-id: ${{ steps.fc.outputs.comment-id }}
+        issue-number: ${{ steps.check-status.outputs.pr_number }}
+        body: |
+          <!-- vibetunnel-ci-status -->
+          ${{ steps.check-status.outputs.comment_body }}
+        edit-mode: replace