feat: PR이 닫힐 때 체크리스트가 완료된 경우 언급된 이슈 자동 닫기 기능 추가 #1

	name: Close Mentioned Issues if Checklist Complete

	on:
	pull_request:
	types: [closed]

	permissions:
	issues: write
	pull-requests: read
	contents: read

	jobs:
	close-mentioned-issues:
	if: github.event.pull_request.merged == true
	runs-on: ubuntu-latest
	steps:
	- 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: Extract issue numbers
	id: issues
	run: \|
	BODY="${{ github.event.pull_request.body }}"
	echo "ISSUES=$(echo "$BODY" \| grep -oE '#[0-9]+' \| tr -d '#' \| tr '\n' ' ')" >> $GITHUB_OUTPUT

	- name: Close mentioned issues
	if: steps.checklist.outputs.checklist-complete == 'true'
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: \|
	for issue in ${{ steps.issues.outputs.ISSUES }}; do
	gh issue close "$issue" --repo "${{ github.repository }}"
	done

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