diff --git a/troubleshooting/251014_coldmail_ir_analysis_scenario.md b/troubleshooting/251014_coldmail_ir_analysis_scenario.md
index 3006f32..763ffc8 100644
--- a/troubleshooting/251014_coldmail_ir_analysis_scenario.md
+++ b/troubleshooting/251014_coldmail_ir_analysis_scenario.md
@@ -79,6 +79,13 @@
 - 상세: 251014_slack_lists_file_attachment.md
 - coldmail_briefing.py:207: document_id → Slack file_id 변환 필요
 
+### 우선순위 4: LangGraph 적용
+- coldmail_briefing.py:76-263 → LangGraph 워크플로우로 전환
+- 노드: fetch_emails → filter_coldmail → process_attachments → analyze_ir → create_slack_item → send_feedback
+- 조건부 분기: 첨부파일 유무, IR 분석 성공/실패
+- 상태 관리: email_data, document_ids, ir_metrics, valuation_result
+- 재시도 로직, 에러 핸들링 개선
+
 ---
 
 ## 교훈