diff --git a/journey/plans/251016_ontology_coldmail_implementation.md b/journey/plans/251016_ontology_coldmail_implementation.md
index 1e95e62..fe7e902 100644
--- a/journey/plans/251016_ontology_coldmail_implementation.md
+++ b/journey/plans/251016_ontology_coldmail_implementation.md
@@ -50,6 +50,11 @@
 
 ## Phase 2-3 상세 작업 (결정 완료)
 
+### 0) 현재 Neo4j 위치 확인 (기반 코드 재사용)
+- **클라이언트**: `rb8001/app/services/memory/neo4j_client.py:1-200`
+- **환경변수**: `rb8001/.env:NEO4J_URI, NEO4J_USER, NEO4J_PASSWORD` (기본값 포함)
+- **기존 사용처**: `rb8001/app/services/memory_hybrid_retrieval.py`, `rb8001/app/services/startup_valuation.py`
+
 ### 1) 데이터 구조 (Neo4j)
 - **노드**: `Email`, `Rule`, `Company`, `Topic`, `User`
 - **관계**: `(:Email)-[:MATCHED_RULE]->(:Rule)`, `(:Email)-[:MENTIONS]->(:Company|Topic)`, `(:User)-[:RECEIVED]->(:Email)`
@@ -61,7 +66,7 @@
   - `User`: `user_id`
 
 ### 2) 서비스/레포지토리 구조 (계층 분리)
-- **state/repositories**: `rb8001/app/state/repositories/coldmail_memory_repository.py` (Neo4j CRUD)
+- **state/repositories**: `rb8001/app/state/repositories/coldmail_memory_repository.py` (Neo4j CRUD, 내부에서 `Neo4jClient` 사용)
 - **services**: `rb8001/app/services/coldmail_memory_service.py` (기억 저장/조회/요약 로직)
 - **services**: `rb8001/app/services/coldmail_ontology_reasoner.py`와 연결 (규칙/기억 반영)
 - **workflows**: `rb8001/app/services/workflows/coldmail_workflow.py`에서 기억 저장 호출