feat: PR이 닫힐 때 체크리스트가 완료된 경우 링크된 이슈 자동 닫기 기능 추가

.github/workflows/auto-merge-develop-pr.yml

@@ -1,23 +1,33 @@
-name: Auto Merge PR from Develop to Main
+name: Close Linked Issues if Checklist Complete
 
 on:
   pull_request:
-    branches:
-      - main
-    types: [opened, synchronize, reopened]
+    types: [closed]
 
 permissions:
-  contents: write
-  pull-requests: write
+  issues: write
+  pull-requests: read
+  contents: read
 
 jobs:
-  auto-merge:
-    if: github.event.pull_request.head.ref == 'develop'
+  close-linked-issues:
+    if: github.event.pull_request.merged == true
     runs-on: ubuntu-latest
+
     steps:
-      - name: Enable auto-merge
-        uses: peter-evans/enable-pull-request-automerge@v3
+      - name: Check if checklist is fully complete
+        id: checklist
+        run: |
+          BODY="${{ github.event.pull_request.body }}"
+          UNCHECKED=$(echo "$BODY" | grep -c '\[ \]')
+          if [ "$UNCHECKED" -eq 0 ]; then
+            echo "checklist-complete=true" >> $GITHUB_OUTPUT
+          else
+            echo "checklist-complete=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Close linked issues if checklist is complete
+        if: steps.checklist.outputs.checklist-complete == 'true'
+        uses: peter-evans/close-issue@v3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          merge-method: merge
-          pull-request-number: ${{ github.event.pull_request.number }}