diff --git a/claude/sample-logical-architecture.mmd b/claude/sample-logical-architecture.mmd
new file mode 100644
index 0000000..1becba2
--- /dev/null
+++ b/claude/sample-logical-architecture.mmd
@@ -0,0 +1 @@
+404: Not Found
\ No newline at end of file
diff --git a/claude/sequence-inner-design.md b/claude/sequence-inner-design.md
index 586c62c..ea62f38 100644
--- a/claude/sequence-inner-design.md
+++ b/claude/sequence-inner-design.md
@@ -11,6 +11,8 @@
 - **외부시퀀스설계서에서 설계한 플로우와 일치**해야 함 
 - UI/UX설계서의 '사용자 플로우'참조하여 설계
 - 마이크로서비스 내부의 처리 흐름을 표시 
+- 요청/응답을 **한글로 표시**
+- Repository CRUD 처리를 한글로 설명하고 SQL은 사용하지 말것  
 - **각 서비스-시나리오별로 분리하여 각각 작성**
 - 각 서비스별 주요 시나리오마다 독립적인 시퀀스 설계 수행
 - 프론트엔드와 백엔드 책임 분리: 프론트엔드에서 할 수 있는 것은 백엔드로 요청 안하게 함  
diff --git a/design/backend/sequence/inner/ai-Todo자동추출.puml b/design/backend/sequence/inner/ai-Todo자동추출.puml
index 1f99030..0caa217 100644
--- a/design/backend/sequence/inner/ai-Todo자동추출.puml
+++ b/design/backend/sequence/inner/ai-Todo자동추출.puml
@@ -27,7 +27,7 @@ activate Service
 Service -> Repo: getFinalTranscript(meetingId)
 activate Repo
 
-Repo -> DB: SELECT content FROM ai_transcripts\nWHERE meeting_id = {meetingId}\nORDER BY created_at DESC LIMIT 1
+Repo -> DB: 최종 회의록 조회
 activate DB
 
 DB --> Repo: 최종 회의록 내용
@@ -41,7 +41,7 @@ Service -> Service: 참석자 정보 조회 준비
 Service -> Repo: getMeetingParticipants(meetingId)
 activate Repo
 
-Repo -> DB: SELECT participants FROM meeting_context
+Repo -> DB: 참석자 정보 조회
 activate DB
 
 DB --> Repo: 참석자 목록
@@ -126,7 +126,7 @@ loop 각 Todo 항목마다
     Service -> Repo: saveTodo(meetingId, todoData)
     activate Repo
 
-    Repo -> DB: INSERT INTO ai_extracted_todos
+    Repo -> DB: Todo 정보 저장
     activate DB
     note right
       저장 데이터:
@@ -195,7 +195,7 @@ deactivate MeetingClient
 Service -> Repo: updateExtractionStatus(meetingId, "COMPLETED")
 activate Repo
 
-Repo -> DB: UPDATE ai_task_status\nSET status = 'COMPLETED',\ncompleted_at = NOW()
+Repo -> DB: 추출 상태 업데이트
 activate DB
 
 DB --> Repo: 업데이트 완료
diff --git a/design/backend/sequence/inner/ai-결정사항제안.puml b/design/backend/sequence/inner/ai-결정사항제안.puml
index 2acae10..9fb40d0 100644
--- a/design/backend/sequence/inner/ai-결정사항제안.puml
+++ b/design/backend/sequence/inner/ai-결정사항제안.puml
@@ -26,7 +26,7 @@ activate Service
 Service -> TranscriptRepo: getMeetingContext(meetingId)
 activate TranscriptRepo
 
-TranscriptRepo -> DB: SELECT meeting_info, participants\nFROM meeting_context
+TranscriptRepo -> DB: 회의 맥락 조회\n(회의정보, 참석자)
 activate DB
 
 DB --> TranscriptRepo: 회의 정보
diff --git a/design/backend/sequence/inner/ai-관련회의록연결.puml b/design/backend/sequence/inner/ai-관련회의록연결.puml
index 2b4ca14..dc09a55 100644
--- a/design/backend/sequence/inner/ai-관련회의록연결.puml
+++ b/design/backend/sequence/inner/ai-관련회의록연결.puml
@@ -28,7 +28,7 @@ activate Service
 Service -> Repo: getTranscriptInfo(transcriptId)
 activate Repo
 
-Repo -> DB: SELECT content, meeting_id, created_at\nFROM ai_transcripts\nWHERE id = {transcriptId}
+Repo -> DB: 회의록 정보 조회
 activate DB
 
 DB --> Repo: 회의록 정보
@@ -153,7 +153,7 @@ loop 각 후보 회의록마다
     Service -> Repo: getTranscriptDetails(candidateId)
     activate Repo
 
-    Repo -> DB: SELECT participants, keywords, created_at
+    Repo -> DB: 회의록 상세 정보 조회
     activate DB
 
     DB --> Repo: 상세 정보
@@ -188,7 +188,7 @@ loop 선택된 상위 5개
     Service -> Repo: saveRelatedTranscript(transcriptId, relatedId, score, keywords)
     activate Repo
 
-    Repo -> DB: INSERT INTO related_transcripts
+    Repo -> DB: 관련 회의록 연결 저장
     activate DB
     note right
       저장 데이터:
diff --git a/design/backend/sequence/inner/ai-논의사항제안.puml b/design/backend/sequence/inner/ai-논의사항제안.puml
index 1780ca5..64aa9f5 100644
--- a/design/backend/sequence/inner/ai-논의사항제안.puml
+++ b/design/backend/sequence/inner/ai-논의사항제안.puml
@@ -26,7 +26,7 @@ activate Service
 Service -> TranscriptRepo: getMeetingContext(meetingId)
 activate TranscriptRepo
 
-TranscriptRepo -> DB: SELECT meeting_info, agenda, participants\nFROM meeting_context
+TranscriptRepo -> DB: 회의 맥락 정보 조회\n(회의정보, 안건, 참석자)
 activate DB
 
 DB --> TranscriptRepo: 회의 정보
@@ -38,7 +38,7 @@ deactivate TranscriptRepo
 Service -> TranscriptRepo: getPreviousDiscussions(meetingId)
 activate TranscriptRepo
 
-TranscriptRepo -> DB: SELECT discussed_topics\nFROM ai_transcripts\nWHERE meeting_id = {meetingId}
+TranscriptRepo -> DB: 이미 논의한 주제 조회\n(회의ID 기준)
 activate DB
 
 DB --> TranscriptRepo: 이미 논의한 주제 목록
diff --git a/design/backend/sequence/inner/ai-맥락기반용어설명.puml b/design/backend/sequence/inner/ai-맥락기반용어설명.puml
index d68c403..ada0a21 100644
--- a/design/backend/sequence/inner/ai-맥락기반용어설명.puml
+++ b/design/backend/sequence/inner/ai-맥락기반용어설명.puml
@@ -33,7 +33,7 @@ activate Service
 Service -> Repo: getTermInfo(term)
 activate Repo
 
-Repo -> DB: SELECT definition, category\nFROM term_dictionary\nWHERE term = {term}
+Repo -> DB: 용어 정보 조회\n(용어사전에서 정의 및 카테고리)
 activate DB
 
 DB --> Repo: 기본 용어 정의
diff --git a/design/backend/sequence/inner/ai-전문용어감지.puml b/design/backend/sequence/inner/ai-전문용어감지.puml
index b1c58c1..7865301 100644
--- a/design/backend/sequence/inner/ai-전문용어감지.puml
+++ b/design/backend/sequence/inner/ai-전문용어감지.puml
@@ -30,7 +30,7 @@ par "조직별 용어 사전"
     Service -> Repo: getOrganizationTerms(organizationId)
     activate Repo
 
-    Repo -> DB: SELECT term, definition, category\nFROM term_dictionary\nWHERE org_id = {organizationId}
+    Repo -> DB: 조직 전문용어 조회\n(조직ID 기준, 용어/정의/카테고리)
     activate DB
 
     DB --> Repo: 조직 전문용어 목록
@@ -43,7 +43,7 @@ else
     Service -> Repo: getIndustryTerms(industry)
     activate Repo
 
-    Repo -> DB: SELECT term, definition, category\nFROM standard_terms\nWHERE industry = {industry}
+    Repo -> DB: 산업 표준용어 조회\n(산업분류 기준, 용어/정의/카테고리)
     activate DB
 
     DB --> Repo: 산업 표준용어 목록
diff --git a/design/backend/sequence/inner/ai-회의록개선.puml b/design/backend/sequence/inner/ai-회의록개선.puml
index 3e67364..a12683e 100644
--- a/design/backend/sequence/inner/ai-회의록개선.puml
+++ b/design/backend/sequence/inner/ai-회의록개선.puml
@@ -30,7 +30,7 @@ activate Service
 Service -> Repo: getOriginalTranscript(meetingId)
 activate Repo
 
-Repo -> DB: SELECT content, version\nFROM ai_transcripts\nWHERE meeting_id = {meetingId}\nAND status = 'FINALIZED'\nORDER BY created_at DESC LIMIT 1
+Repo -> DB: 원본 회의록 조회
 activate DB
 
 DB --> Repo: 원본 회의록 내용
@@ -146,7 +146,7 @@ end note
 Service -> Repo: saveImprovedTranscript(meetingId, improvedContent, metadata)
 activate Repo
 
-Repo -> DB: INSERT INTO ai_transcripts
+Repo -> DB: 개선된 회의록 저장
 activate DB
 note right
   저장 데이터:
@@ -172,7 +172,7 @@ deactivate Repo
 Service -> Repo: linkVersions(originalId, improvedId)
 activate Repo
 
-Repo -> DB: INSERT INTO transcript_versions
+Repo -> DB: 버전 연결 정보 저장
 activate DB
 note right
   버전 연결 정보:
diff --git a/design/backend/sequence/inner/ai-회의록자동작성.puml b/design/backend/sequence/inner/ai-회의록자동작성.puml
index 79b1459..bf81ea2 100644
--- a/design/backend/sequence/inner/ai-회의록자동작성.puml
+++ b/design/backend/sequence/inner/ai-회의록자동작성.puml
@@ -30,7 +30,7 @@ Service -> Service: 회의 맥락 정보 조회 준비
 par 회의 정보 조회
     Service -> Repo: getMeetingContext(meetingId)
     activate Repo
-    Repo -> DB: SELECT meeting_info
+    Repo -> DB: 회의 맥락 정보 조회
     activate DB
     DB --> Repo: 회의 정보 반환
     deactivate DB
@@ -39,7 +39,7 @@ par 회의 정보 조회
 else 이전 내용 조회
     Service -> Repo: getPreviousTranscripts(meetingId)
     activate Repo
-    Repo -> DB: SELECT previous_content
+    Repo -> DB: 이전 회의록 내용 조회
     activate DB
     DB --> Repo: 이전 회의록
     deactivate DB
@@ -82,7 +82,7 @@ Service -> Service: 회의록 데이터 구조화
 Service -> Repo: saveTranscriptDraft(meetingId, content)
 activate Repo
 
-Repo -> DB: INSERT INTO ai_transcripts
+Repo -> DB: AI 회의록 초안 저장 (상태: DRAFT)
 activate DB
 note right
 저장 데이터:
@@ -222,6 +222,30 @@ note right
   * decisions: []
 end note
 
+note over Controller, DB
+AI 제안 병합 프로세스:
+
+1. 자동 병합 (Auto-merge):
+   - confidence >= 0.8인 결정사항
+   → 회의록 "결정사항" 섹션에 자동 추가
+   - priority: HIGH인 논의사항
+   → "추가 논의 필요" 섹션에 자동 반영
+
+2. 사용자 검토 (User Review):
+   - 0.5 <= confidence < 0.8
+   → 제안 목록에 표시, 사용자 승인 대기
+   - priority: MEDIUM/LOW
+   → 선택적 반영 가능
+
+3. 병합 시점:
+   - 실시간: 회의 진행 중 자동 반영
+   - 최종: 회의록 확정 전 사용자 최종 검토
+
+4. 병합 이력:
+   - 제안 ID, 병합 여부, 승인자, 시각 기록
+   - 감사 추적(Audit Trail) 유지
+end note
+
 note over Controller, DB
 처리 시간:
 - 맥락 조회: 100-200ms
diff --git a/design/backend/sequence/inner/meeting-Todo완료처리.puml b/design/backend/sequence/inner/meeting-Todo완료처리.puml
index b48fff6..11d7517 100644
--- a/design/backend/sequence/inner/meeting-Todo완료처리.puml
+++ b/design/backend/sequence/inner/meeting-Todo완료처리.puml
@@ -29,7 +29,7 @@ activate Service
 ' Todo 정보 조회
 Service -> TodoRepo: findById(todoId)
 activate TodoRepo
-TodoRepo -> DB: SELECT * FROM todos WHERE id = ?
+TodoRepo -> DB: Todo 정보 조회
 activate DB
 DB --> TodoRepo: Todo 정보
 deactivate DB
@@ -49,10 +49,34 @@ Service -> Service: 완료 권한 검증\n(담당자만 가능)
 
 alt 권한 없음
     Service --> Controller: 403 Forbidden\n담당자만 완료 가능
+    note right
+      에러 응답 형식:
+      {
+        "error": {
+          "code": "INSUFFICIENT_PERMISSION",
+          "message": "Todo 완료 권한이 없습니다",
+          "details": "담당자만 Todo를 완료할 수 있습니다",
+          "timestamp": "2025-10-23T12:00:00Z",
+          "path": "/api/todos/{todoId}/complete"
+        }
+      }
+    end note
     return 403 Forbidden
 else 권한 있음
     alt Todo가 이미 완료됨
         Service --> Controller: 409 Conflict\n이미 완료된 Todo
+        note right
+          에러 응답 형식:
+          {
+            "error": {
+              "code": "TODO_ALREADY_COMPLETED",
+              "message": "이미 완료된 Todo입니다",
+              "details": "해당 Todo는 이미 완료 처리되었습니다",
+              "timestamp": "2025-10-23T12:00:00Z",
+              "path": "/api/todos/{todoId}/complete"
+            }
+          }
+        end note
         return 409 Conflict
     else 완료 처리 가능
         ' 완료 확인 다이얼로그 (프론트엔드에서 처리됨)
@@ -60,7 +84,7 @@ else 권한 있음
         ' Todo 완료 처리
         Service -> TodoRepo: markAsCompleted(todoId, userId)
         activate TodoRepo
-        TodoRepo -> DB: UPDATE todos\nSET status = 'COMPLETED',\n    completedAt = NOW(),\n    completedBy = ?\nWHERE id = ?
+        TodoRepo -> DB: Todo 완료 상태 업데이트
         activate DB
         DB --> TodoRepo: 업데이트 완료
         deactivate DB
@@ -77,7 +101,7 @@ else 권한 있음
         ' 회의록 섹션 업데이트
         Service -> MinutesRepo: updateTodoStatus(todoId, "COMPLETED")
         activate MinutesRepo
-        MinutesRepo -> DB: UPDATE minutes_sections\nSET todoStatuses = JSON_SET(todoStatuses,\n  CONCAT('$."', ?, '"'),\n  JSON_OBJECT(\n    'status', 'COMPLETED',\n    'completedAt', NOW(),\n    'completedBy', ?\n  )\n)\nWHERE JSON_CONTAINS(todoIds, CAST(? AS JSON))
+        MinutesRepo -> DB: 회의록 섹션의 Todo 상태 업데이트
         activate DB
         DB --> MinutesRepo: 업데이트 완료
         deactivate DB
@@ -87,7 +111,7 @@ else 권한 있음
         ' 회의록의 모든 Todo 완료 여부 확인
         Service -> TodoRepo: countPendingTodos(minutesId)
         activate TodoRepo
-        TodoRepo -> DB: SELECT COUNT(*) FROM todos\nWHERE minutesId = ?\nAND status != 'COMPLETED'
+        TodoRepo -> DB: 미완료 Todo 개수 조회
         activate DB
         DB --> TodoRepo: 미완료 Todo 개수
         deactivate DB
diff --git a/design/backend/sequence/inner/meeting-Todo할당.puml b/design/backend/sequence/inner/meeting-Todo할당.puml
index 2a9f0a2..39ef3cc 100644
--- a/design/backend/sequence/inner/meeting-Todo할당.puml
+++ b/design/backend/sequence/inner/meeting-Todo할당.puml
@@ -44,7 +44,7 @@ end note
 ' 회의록 존재 확인
 Service -> MinutesRepo: findById(minutesId)
 activate MinutesRepo
-MinutesRepo -> DB: SELECT * FROM minutes WHERE id = ?
+MinutesRepo -> DB: 회의록 정보 조회
 activate DB
 DB --> MinutesRepo: 회의록 정보
 deactivate DB
@@ -58,7 +58,7 @@ Service -> Service: Todo 엔티티 생성\n- todoId (UUID)\n- 상태: IN_PROGRES
 
 Service -> TodoRepo: save(todo)
 activate TodoRepo
-TodoRepo -> DB: INSERT INTO todos\n(id, content, assignee, dueDate,\npriority, status, minutesId, sectionId,\ncreatedBy, createdAt)
+TodoRepo -> DB: Todo 정보 저장
 activate DB
 DB --> TodoRepo: Todo 저장 완료
 deactivate DB
@@ -74,7 +74,7 @@ end note
 ' 회의록 섹션에 Todo 연결
 Service -> MinutesRepo: linkTodoToSection(sectionId, todoId)
 activate MinutesRepo
-MinutesRepo -> DB: UPDATE minutes_sections\nSET todoIds = JSON_ARRAY_APPEND(todoIds, '$', ?)\nWHERE id = ?
+MinutesRepo -> DB: 회의록 섹션에 Todo 연결
 activate DB
 DB --> MinutesRepo: 업데이트 완료
 deactivate DB
@@ -100,7 +100,7 @@ alt 마감일 설정됨
 
     Service -> TodoRepo: updateCalendarEventId(todoId, eventId)
     activate TodoRepo
-    TodoRepo -> DB: UPDATE todos\nSET calendarEventId = ?\nWHERE id = ?
+    TodoRepo -> DB: 캘린더 이벤트 ID 업데이트
     activate DB
     DB --> TodoRepo: 업데이트 완료
     deactivate DB
diff --git a/design/backend/sequence/inner/meeting-검증완료.puml b/design/backend/sequence/inner/meeting-검증완료.puml
index 6664bbe..c7d5808 100644
--- a/design/backend/sequence/inner/meeting-검증완료.puml
+++ b/design/backend/sequence/inner/meeting-검증완료.puml
@@ -21,7 +21,7 @@ activate Service
 
 Service -> Repository: findById(meetingId)
 activate Repository
-Repository -> DB: SELECT * FROM meetings WHERE id = ?
+Repository -> DB: 회의 정보 조회\n(회의ID 기준)
 activate DB
 DB --> Repository: meeting_row
 deactivate DB
@@ -67,15 +67,20 @@ alt validation passed
 
     Service -> Repository: save(meeting)
     activate Repository
-    Repository -> DB: UPDATE meetings SET status = 'VALIDATED'
+    Repository -> DB: 회의 상태 업데이트\n(상태='검증완료')
     activate DB
     DB --> Repository: affected_rows
     deactivate DB
     Repository --> Service: savedMeeting
     deactivate Repository
 
-    Service -> Cache: set(meeting:{id}, meetingData)
+    Service -> Cache: SET meeting:{id}\n(TTL: 10분)
     activate Cache
+    note right of Cache
+      회의 정보 캐싱:
+      - TTL: 10분
+      - 자동 만료
+    end note
     Cache --> Service: OK
     deactivate Cache
 
@@ -89,7 +94,19 @@ alt validation passed
 
     Service --> Controller: success response
 else validation failed
-    Service --> Controller: error response with details
+    Service --> Controller: 400 Bad Request
+    note right
+      에러 응답 형식:
+      {
+        "error": {
+          "code": "VALIDATION_FAILED",
+          "message": "회의록 검증에 실패했습니다",
+          "details": "필수 항목 누락 또는 형식 오류",
+          "timestamp": "2025-10-23T12:00:00Z",
+          "path": "/api/meetings/{id}/validate"
+        }
+      }
+    end note
 end
 
 deactivate Service
diff --git a/design/backend/sequence/inner/meeting-대시보드조회.puml b/design/backend/sequence/inner/meeting-대시보드조회.puml
index a5690ac..a045256 100644
--- a/design/backend/sequence/inner/meeting-대시보드조회.puml
+++ b/design/backend/sequence/inner/meeting-대시보드조회.puml
@@ -34,7 +34,7 @@ else Cache Miss
     ' 예정된 회의 조회
     Service -> MeetingRepo: findUpcomingMeetings(userId)
     activate MeetingRepo
-    MeetingRepo -> DB: SELECT meetings\nWHERE userId = ? AND status = 'SCHEDULED'\nAND startTime > NOW()\nORDER BY startTime LIMIT 3
+    MeetingRepo -> DB: 예정된 회의 조회
     activate DB
     DB --> MeetingRepo: 예정된 회의 목록
     deactivate DB
@@ -44,7 +44,7 @@ else Cache Miss
     ' 진행 중 Todo 조회
     Service -> TodoRepo: findActiveTodos(userId)
     activate TodoRepo
-    TodoRepo -> DB: SELECT todos\nWHERE assignee = ? AND status = 'IN_PROGRESS'\nORDER BY dueDate LIMIT 3
+    TodoRepo -> DB: 진행 중 Todo 조회
     activate DB
     DB --> TodoRepo: 진행 중 Todo 목록
     deactivate DB
@@ -54,7 +54,7 @@ else Cache Miss
     ' 최근 회의록 조회
     Service -> MinutesRepo: findRecentMinutes(userId)
     activate MinutesRepo
-    MinutesRepo -> DB: SELECT minutes\nWHERE creatorId = ?\nORDER BY createdAt DESC LIMIT 3
+    MinutesRepo -> DB: 최근 회의록 조회
     activate DB
     DB --> MinutesRepo: 최근 회의록 목록
     deactivate DB
@@ -64,7 +64,7 @@ else Cache Miss
     ' 공유받은 회의록 조회
     Service -> MinutesRepo: findSharedMinutes(userId)
     activate MinutesRepo
-    MinutesRepo -> DB: SELECT minutes m JOIN shared_minutes sm\nON m.id = sm.minutesId\nWHERE sm.sharedWith = ?\nORDER BY sm.sharedAt DESC LIMIT 3
+    MinutesRepo -> DB: 공유받은 회의록 조회
     activate DB
     DB --> MinutesRepo: 공유받은 회의록 목록
     deactivate DB
@@ -74,7 +74,7 @@ else Cache Miss
     ' 통계 정보 조회
     Service -> MeetingRepo: countUpcomingMeetings(userId)
     activate MeetingRepo
-    MeetingRepo -> DB: SELECT COUNT(*)\nFROM meetings\nWHERE userId = ? AND status = 'SCHEDULED'
+    MeetingRepo -> DB: 예정된 회의 개수 조회
     activate DB
     DB --> MeetingRepo: 예정된 회의 개수
     deactivate DB
@@ -83,7 +83,7 @@ else Cache Miss
 
     Service -> TodoRepo: countActiveTodos(userId)
     activate TodoRepo
-    TodoRepo -> DB: SELECT COUNT(*)\nFROM todos\nWHERE assignee = ? AND status = 'IN_PROGRESS'
+    TodoRepo -> DB: 진행 중 Todo 개수 조회
     activate DB
     DB --> TodoRepo: 진행 중 Todo 개수
     deactivate DB
@@ -92,7 +92,7 @@ else Cache Miss
 
     Service -> TodoRepo: calculateTodoCompletionRate(userId)
     activate TodoRepo
-    TodoRepo -> DB: SELECT\n  (COUNT(CASE WHEN status='COMPLETED' THEN 1 END) * 100.0 /\n   COUNT(*)) as rate\nFROM todos WHERE assignee = ?
+    TodoRepo -> DB: Todo 완료율 조회
     activate DB
     DB --> TodoRepo: Todo 완료율
     deactivate DB
diff --git a/design/backend/sequence/inner/meeting-실시간수정동기화.puml b/design/backend/sequence/inner/meeting-실시간수정동기화.puml
index 85f1a2a..65a83bd 100644
--- a/design/backend/sequence/inner/meeting-실시간수정동기화.puml
+++ b/design/backend/sequence/inner/meeting-실시간수정동기화.puml
@@ -53,11 +53,13 @@ end note
 TranscriptService --> Service: updatedVersion
 deactivate TranscriptService
 
-Service -> Cache: set(meeting:{id}:version, versionData)
+Service -> Cache: SET meeting:{id}:version\n(TTL: 1시간)
 activate Cache
 note right of Cache
-버전 정보 업데이트
-최신 상태 유지
+  세션 버전 정보 캐싱:
+  - TTL: 1시간
+  - 버전 정보 업데이트
+  - 최신 상태 유지
 end note
 Cache --> Service: OK
 deactivate Cache
diff --git a/design/backend/sequence/inner/meeting-최종회의록확정.puml b/design/backend/sequence/inner/meeting-최종회의록확정.puml
index fc82064..fcd5e27 100644
--- a/design/backend/sequence/inner/meeting-최종회의록확정.puml
+++ b/design/backend/sequence/inner/meeting-최종회의록확정.puml
@@ -4,7 +4,7 @@
 title 최종 회의록 확정 내부 시퀀스
 
 participant "API Gateway<<E>>" as Gateway
-participant "MeetingController" as Controller
+participant "MinutesController" as Controller
 participant "MeetingService" as Service
 participant "Meeting" as Domain
 participant "TranscriptService" as TranscriptService
@@ -13,7 +13,7 @@ database "PostgreSQL<<E>>" as DB
 database "Redis Cache<<E>>" as Cache
 queue "Event Hub<<E>>" as EventHub
 
-Gateway -> Controller: POST /api/meetings/{id}/confirm
+Gateway -> Controller: POST /api/minutes/{minutesId}/finalize
 activate Controller
 
 Controller -> Service: confirmTranscript(meetingId)
@@ -21,7 +21,7 @@ activate Service
 
 Service -> Repository: findById(meetingId)
 activate Repository
-Repository -> DB: SELECT * FROM meetings WHERE id = ?
+Repository -> DB: 회의 정보 조회\n(회의ID 기준)
 activate DB
 DB --> Repository: meeting_row
 deactivate DB
@@ -33,10 +33,37 @@ activate Domain
 
 Domain -> Domain: validateCanConfirm()
 note right of Domain
-도메인 규칙:
-- COMPLETED 상태 검증
-- 작성자 권한 검증
-- 회의록 존재 여부 확인
+회의록 확정 검증 규칙:
+
+1. 상태 검증:
+   - 회의 상태 = COMPLETED (종료됨)
+   - 회의록 상태 = DRAFT (작성중)
+   ✗ IN_PROGRESS → 400 Bad Request
+
+2. 권한 검증:
+   - 확정 요청자 = 회의 생성자 OR
+   - 확정 요청자 ∈ 참석자 목록
+   ✗ 권한 없음 → 403 Forbidden
+
+3. 필수 항목 검증:
+   - 회의록 제목: NOT NULL, 길이 >= 5
+   - 참석자 목록: 최소 1명 이상
+   - 주요 논의 내용: NOT NULL, 길이 >= 20
+   - 결정 사항: 최소 1개 이상 OR
+     "결정사항 없음" 명시적 표시
+   ✗ 누락 → 400 Bad Request
+     (누락 항목 목록 반환)
+
+4. 데이터 무결성:
+   - 섹션별 내용 완결성 확인
+   - 참조 링크 유효성 확인
+   - 첨부 파일 접근 가능 여부
+   ✗ 무결성 위반 → 400 Bad Request
+
+5. 이력 검증:
+   - 마지막 수정 후 24시간 경과 경고
+   - 미승인 AI 제안 존재 시 알림
+   ⚠️ 경고만 표시, 진행 가능
 end note
 
 Domain -> Domain: changeStatus(CONFIRMED)
@@ -56,19 +83,24 @@ deactivate TranscriptService
 
 Service -> Repository: save(meeting)
 activate Repository
-Repository -> DB: UPDATE meetings SET status = 'CONFIRMED', confirmed_at = ?
+Repository -> DB: 회의 상태 업데이트\n(상태='확정', 확정일시)
 activate DB
 DB --> Repository: affected_rows
 deactivate DB
 Repository --> Service: savedMeeting
 deactivate Repository
 
-Service -> Cache: set(meeting:{id}, meetingData)
+Service -> Cache: SET meeting:{id}\n(TTL: 10분)
 activate Cache
+note right of Cache
+  회의 정보 캐싱:
+  - TTL: 10분
+  - 자동 만료
+end note
 Cache --> Service: OK
 deactivate Cache
 
-Service ->> EventHub: publish(TranscriptConfirmedEvent)
+Service ->> EventHub: publish(MinutesFinalized)
 activate EventHub
 note right of EventHub
 비동기 이벤트:
diff --git a/design/backend/sequence/inner/meeting-충돌해결.puml b/design/backend/sequence/inner/meeting-충돌해결.puml
index ab3e3c9..a46cf07 100644
--- a/design/backend/sequence/inner/meeting-충돌해결.puml
+++ b/design/backend/sequence/inner/meeting-충돌해결.puml
@@ -62,11 +62,13 @@ alt auto-resolved
     deactivate Cache
 
 else manual-required
-    Service -> Cache: set(meeting:{id}:conflicts, conflictData)
+    Service -> Cache: SET meeting:{id}:conflicts\n(TTL: 1시간)
     activate Cache
     note right of Cache
-    충돌 정보 저장
-    수동 해결 대기
+      충돌 정보 캐싱:
+      - TTL: 1시간
+      - 충돌 정보 저장
+      - 수동 해결 대기
     end note
     Cache --> Service: OK
     deactivate Cache
diff --git a/design/backend/sequence/inner/meeting-템플릿선택.puml b/design/backend/sequence/inner/meeting-템플릿선택.puml
index 5f96a1d..8b22921 100644
--- a/design/backend/sequence/inner/meeting-템플릿선택.puml
+++ b/design/backend/sequence/inner/meeting-템플릿선택.puml
@@ -25,7 +25,7 @@ deactivate Cache
 
 Service -> Repository: findById(meetingId)
 activate Repository
-Repository -> DB: SELECT * FROM meetings WHERE id = ?
+Repository -> DB: 회의 정보 조회\n(회의ID 기준)
 activate DB
 DB --> Repository: meeting_row
 deactivate DB
@@ -56,15 +56,20 @@ deactivate Domain
 
 Service -> Repository: save(meeting)
 activate Repository
-Repository -> DB: UPDATE meetings SET template_id = ?
+Repository -> DB: 회의 템플릿 업데이트\n(템플릿ID)
 activate DB
 DB --> Repository: affected_rows
 deactivate DB
 Repository --> Service: savedMeeting
 deactivate Repository
 
-Service -> Cache: set(meeting:{id}, meetingData)
+Service -> Cache: SET meeting:{id}\n(TTL: 10분)
 activate Cache
+note right of Cache
+  회의 정보 캐싱:
+  - TTL: 10분
+  - 자동 만료
+end note
 Cache --> Service: OK
 deactivate Cache
 
diff --git a/design/backend/sequence/inner/meeting-회의록공유.puml b/design/backend/sequence/inner/meeting-회의록공유.puml
index 7fa7384..a9603ff 100644
--- a/design/backend/sequence/inner/meeting-회의록공유.puml
+++ b/design/backend/sequence/inner/meeting-회의록공유.puml
@@ -39,7 +39,7 @@ activate Service
 ' 회의록 정보 조회
 Service -> MinutesRepo: findById(minutesId)
 activate MinutesRepo
-MinutesRepo -> DB: SELECT * FROM minutes WHERE id = ?
+MinutesRepo -> DB: 회의록 정보 조회
 activate DB
 DB --> MinutesRepo: 회의록 정보
 deactivate DB
@@ -61,6 +61,18 @@ Service -> Service: 회의록 상태 확인
 
 alt 회의록이 확정되지 않음
     Service --> Controller: 400 Bad Request\n확정된 회의록만 공유 가능
+    note right
+      에러 응답 형식:
+      {
+        "error": {
+          "code": "MINUTES_NOT_FINALIZED",
+          "message": "확정된 회의록만 공유 가능합니다",
+          "details": "회의록을 먼저 확정해 주세요",
+          "timestamp": "2025-10-23T12:00:00Z",
+          "path": "/api/minutes/{minutesId}/share"
+        }
+      }
+    end note
     return 400 Bad Request
 else 공유 가능
     ' 공유 링크 생성
@@ -68,7 +80,7 @@ else 공유 가능
 
     Service -> ShareRepo: createShareLink(minutesId, token, options)
     activate ShareRepo
-    ShareRepo -> DB: INSERT INTO share_links\n(minutesId, token, permission,\nexpiresAt, requirePassword, passwordHash,\ncreatedBy, createdAt)
+    ShareRepo -> DB: 공유 링크 정보 저장
     activate DB
     DB --> ShareRepo: 링크 생성 완료
     deactivate DB
@@ -79,7 +91,7 @@ else 공유 가능
     loop 각 공유 대상마다
         Service -> ShareRepo: addSharedUser(minutesId, userEmail, permission)
         activate ShareRepo
-        ShareRepo -> DB: INSERT INTO shared_minutes\n(minutesId, sharedWith, permission,\nsharedBy, sharedAt)
+        ShareRepo -> DB: 공유 대상 정보 저장
         activate DB
         DB --> ShareRepo: 공유 정보 저장 완료
         deactivate DB
diff --git a/design/backend/sequence/inner/meeting-회의록목록조회.puml b/design/backend/sequence/inner/meeting-회의록목록조회.puml
index 753982d..764fd31 100644
--- a/design/backend/sequence/inner/meeting-회의록목록조회.puml
+++ b/design/backend/sequence/inner/meeting-회의록목록조회.puml
@@ -36,7 +36,7 @@ deactivate Cache
 Service -> Repository: findAll(specification, pageable)
 activate Repository
 
-Repository -> DB: SELECT * FROM meetings WHERE ... ORDER BY ... LIMIT ? OFFSET ?
+Repository -> DB: 회의록 목록 조회\n(필터 조건, 정렬, 페이징)
 activate DB
 DB --> Repository: meeting_rows
 deactivate DB
@@ -51,8 +51,13 @@ note right of Service
 - 민감 정보 필터링
 end note
 
-Service -> Cache: set(meetings:list:{hash}, responseData)
+Service -> Cache: SET meetings:list:{hash}\n(TTL: 5분)
 activate Cache
+note right of Cache
+  목록 데이터 캐싱:
+  - TTL: 5분
+  - 자동 만료
+end note
 Cache --> Service: OK
 deactivate Cache
 
diff --git a/design/backend/sequence/inner/meeting-회의록상세조회.puml b/design/backend/sequence/inner/meeting-회의록상세조회.puml
index 4a0ad09..5d89426 100644
--- a/design/backend/sequence/inner/meeting-회의록상세조회.puml
+++ b/design/backend/sequence/inner/meeting-회의록상세조회.puml
@@ -35,6 +35,18 @@ alt Cache Hit
 
     alt 권한 없음
         Service --> Controller: 403 Forbidden\n조회 권한 없음
+        note right
+          에러 응답 형식:
+          {
+            "error": {
+              "code": "ACCESS_DENIED",
+              "message": "조회 권한이 없습니다",
+              "details": "회의록 조회 권한이 없는 사용자입니다",
+              "timestamp": "2025-10-23T12:00:00Z",
+              "path": "/api/minutes/{minutesId}"
+            }
+          }
+        end note
         return 403 Forbidden
     else 권한 있음
         Service --> Controller: MinutesDetailResponse\n(캐시 데이터)
@@ -44,7 +56,7 @@ else Cache Miss
     ' 회의록 기본 정보 조회
     Service -> MinutesRepo: findByIdWithMeeting(minutesId)
     activate MinutesRepo
-    MinutesRepo -> DB: SELECT m.*, mt.*\nFROM minutes m\nJOIN meetings mt ON m.meetingId = mt.id\nWHERE m.id = ?
+    MinutesRepo -> DB: 회의록 및 회의 정보 조회
     activate DB
     DB --> MinutesRepo: 회의록 및 회의 정보
     deactivate DB
@@ -65,7 +77,7 @@ else Cache Miss
     ' 권한 확인
     Service -> MinutesRepo: hasAccessPermission(minutesId, userId)
     activate MinutesRepo
-    MinutesRepo -> DB: SELECT COUNT(*) FROM (\n  SELECT 1 FROM minutes WHERE id = ? AND creatorId = ?\n  UNION\n  SELECT 1 FROM participants p JOIN meetings m\n    ON p.meetingId = m.id JOIN minutes mi\n    ON mi.meetingId = m.id\n    WHERE mi.id = ? AND p.userId = ?\n  UNION\n  SELECT 1 FROM shared_minutes\n    WHERE minutesId = ? AND sharedWith = ?\n) AS access
+    MinutesRepo -> DB: 회의록 조회 권한 확인
     activate DB
     DB --> MinutesRepo: 권한 확인 결과
     deactivate DB
@@ -74,12 +86,24 @@ else Cache Miss
 
     alt 권한 없음
         Service --> Controller: 403 Forbidden\n조회 권한 없음
+        note right
+          에러 응답 형식:
+          {
+            "error": {
+              "code": "ACCESS_DENIED",
+              "message": "조회 권한이 없습니다",
+              "details": "회의록 조회 권한이 없는 사용자입니다",
+              "timestamp": "2025-10-23T12:00:00Z",
+              "path": "/api/minutes/{minutesId}"
+            }
+          }
+        end note
         return 403 Forbidden
     else 권한 있음
         ' 참석자 목록 조회
         Service -> MinutesRepo: findParticipants(minutesId)
         activate MinutesRepo
-        MinutesRepo -> DB: SELECT p.*, u.name, u.email\nFROM participants p\nJOIN meetings m ON p.meetingId = m.id\nJOIN minutes mi ON mi.meetingId = m.id\nJOIN users u ON p.userId = u.id\nWHERE mi.id = ?
+        MinutesRepo -> DB: 참석자 목록 조회
         activate DB
         DB --> MinutesRepo: 참석자 목록
         deactivate DB
@@ -89,7 +113,7 @@ else Cache Miss
         ' 섹션별 상세 내용 조회
         Service -> SectionRepo: findSectionsByMinutesId(minutesId)
         activate SectionRepo
-        SectionRepo -> DB: SELECT * FROM minutes_sections\nWHERE minutesId = ?\nORDER BY sectionOrder
+        SectionRepo -> DB: 섹션 목록 조회
         activate DB
         DB --> SectionRepo: 섹션 목록
         deactivate DB
@@ -99,7 +123,7 @@ else Cache Miss
         ' AI 요약 정보 조회
         Service -> SectionRepo: findAISummaries(minutesId)
         activate SectionRepo
-        SectionRepo -> DB: SELECT * FROM ai_summaries\nWHERE minutesId = ?\nORDER BY sectionId
+        SectionRepo -> DB: AI 요약 정보 조회
         activate DB
         DB --> SectionRepo: AI 요약 목록
         deactivate DB
@@ -117,7 +141,7 @@ else Cache Miss
         - 최대 3개
         end note
 
-        RelatedService -> DB: SELECT * FROM related_minutes\nWHERE minutesId = ?\nAND similarityScore >= 0.7\nORDER BY similarityScore DESC\nLIMIT 3
+        RelatedService -> DB: 관련 회의록 조회
         activate DB
         DB --> RelatedService: 관련 회의록 목록
         deactivate DB
@@ -127,7 +151,7 @@ else Cache Miss
         ' 조회 이력 기록
         Service -> MinutesRepo: recordViewHistory(minutesId, userId)
         activate MinutesRepo
-        MinutesRepo -> DB: INSERT INTO view_history\n(minutesId, userId, viewedAt)\nVALUES (?, ?, NOW())
+        MinutesRepo -> DB: 조회 이력 기록
         activate DB
         DB --> MinutesRepo: 기록 완료
         deactivate DB
diff --git a/design/backend/sequence/inner/meeting-회의록수정.puml b/design/backend/sequence/inner/meeting-회의록수정.puml
index 6660d7f..fc536ac 100644
--- a/design/backend/sequence/inner/meeting-회의록수정.puml
+++ b/design/backend/sequence/inner/meeting-회의록수정.puml
@@ -40,7 +40,7 @@ activate Service
 ' 회의록 정보 조회
 Service -> MinutesRepo: findById(minutesId)
 activate MinutesRepo
-MinutesRepo -> DB: SELECT * FROM minutes WHERE id = ?
+MinutesRepo -> DB: 회의록 정보 조회
 activate DB
 DB --> MinutesRepo: 회의록 정보
 deactivate DB
@@ -61,6 +61,18 @@ Service -> Service: 수정 권한 검증\n(생성자만 가능)
 
 alt 권한 없음
     Service --> Controller: 403 Forbidden\n수정 권한 없음
+    note right
+      에러 응답 형식:
+      {
+        "error": {
+          "code": "ACCESS_DENIED",
+          "message": "회의록 수정 권한이 없습니다",
+          "details": "생성자만 회의록을 수정할 수 있습니다",
+          "timestamp": "2025-10-23T12:00:00Z",
+          "path": "/api/minutes/{minutesId}"
+        }
+      }
+    end note
     return 403 Forbidden
 else 권한 있음
     ' 잠긴 섹션 확인
@@ -77,12 +89,24 @@ else 권한 있음
 
     alt 잠긴 섹션 수정 시도
         Service --> Controller: 400 Bad Request\n잠긴 섹션은 수정 불가
+        note right
+          에러 응답 형식:
+          {
+            "error": {
+              "code": "SECTION_LOCKED",
+              "message": "잠긴 섹션은 수정할 수 없습니다",
+              "details": "해당 섹션은 잠금 상태로 수정이 제한됩니다",
+              "timestamp": "2025-10-23T12:00:00Z",
+              "path": "/api/minutes/{minutesId}"
+            }
+          }
+        end note
         return 400 Bad Request
     else 수정 가능
         ' 수정 이력 저장 (버전 관리)
         Service -> VersionService: createModificationHistory(minutesId, userId, changes)
         activate VersionService
-        VersionService -> DB: INSERT INTO modification_history\n(minutesId, modifiedBy, modifiedAt,\nchangeType, oldValue, newValue)
+        VersionService -> DB: 수정 이력 저장
         activate DB
         DB --> VersionService: 이력 저장 완료
         deactivate DB
@@ -93,7 +117,7 @@ else 권한 있음
         alt 제목 변경됨
             Service -> MinutesRepo: updateTitle(minutesId, newTitle)
             activate MinutesRepo
-            MinutesRepo -> DB: UPDATE minutes\nSET title = ?,\n    updatedAt = NOW(),\n    updatedBy = ?\nWHERE id = ?
+            MinutesRepo -> DB: 회의록 제목 수정
             activate DB
             DB --> MinutesRepo: 업데이트 완료
             deactivate DB
@@ -105,7 +129,7 @@ else 권한 있음
         loop 각 섹션마다
             Service -> SectionRepo: updateSection(sectionId, content, aiSummary)
             activate SectionRepo
-            SectionRepo -> DB: UPDATE minutes_sections\nSET content = ?,\n    aiSummary = ?,\n    updatedAt = NOW(),\n    updatedBy = ?\nWHERE id = ?
+            SectionRepo -> DB: 섹션 내용 및 AI 요약 수정
             activate DB
             DB --> SectionRepo: 업데이트 완료
             deactivate DB
@@ -117,7 +141,7 @@ else 권한 있음
         alt 확정된 회의록 수정
             Service -> MinutesRepo: updateStatus(minutesId, "DRAFT")
             activate MinutesRepo
-            MinutesRepo -> DB: UPDATE minutes\nSET status = 'DRAFT'\nWHERE id = ?\nAND status = 'FINALIZED'
+            MinutesRepo -> DB: 확정된 회의록을 다시 작성 중(DRAFT)으로 변경
             activate DB
             DB --> MinutesRepo: 업데이트 완료
             deactivate DB
diff --git a/design/backend/sequence/inner/meeting-회의록확정.puml b/design/backend/sequence/inner/meeting-회의록확정.puml
index 58fcc86..34f9591 100644
--- a/design/backend/sequence/inner/meeting-회의록확정.puml
+++ b/design/backend/sequence/inner/meeting-회의록확정.puml
@@ -28,7 +28,7 @@ activate Service
 ' 회의록 정보 조회
 Service -> MinutesRepo: findById(minutesId)
 activate MinutesRepo
-MinutesRepo -> DB: SELECT * FROM minutes WHERE id = ?
+MinutesRepo -> DB: 회의록 정보 조회
 activate DB
 DB --> MinutesRepo: 회의록 정보
 deactivate DB
@@ -49,6 +49,18 @@ Service -> Service: 회의록 상태 확인
 
 alt 회의록이 이미 확정됨
     Service --> Controller: 409 Conflict\n이미 확정된 회의록
+    note right
+      에러 응답 형식:
+      {
+        "error": {
+          "code": "MINUTES_ALREADY_FINALIZED",
+          "message": "이미 확정된 회의록입니다",
+          "details": "확정된 회의록은 다시 확정할 수 없습니다",
+          "timestamp": "2025-10-23T12:00:00Z",
+          "path": "/api/minutes/{minutesId}/finalize"
+        }
+      }
+    end note
     return 409 Conflict
 else 확정 가능
     note over Service
@@ -71,6 +83,18 @@ else 확정 가능
     alt 필수 항목 누락
         ValidationService --> Service: ValidationException\n누락된 항목 목록
         Service --> Controller: 400 Bad Request\n필수 항목 누락
+        note right
+          에러 응답 형식:
+          {
+            "error": {
+              "code": "MISSING_REQUIRED_FIELDS",
+              "message": "필수 항목이 누락되었습니다",
+              "details": "회의 제목, 참석자 목록, 논의 내용 중 일부가 누락되었습니다",
+              "timestamp": "2025-10-23T12:00:00Z",
+              "path": "/api/minutes/{minutesId}/finalize"
+            }
+          }
+        end note
         return 400 Bad Request
     else 검증 통과
         ValidationService --> Service: 검증 성공
@@ -82,7 +106,7 @@ else 확정 가능
         ' 회의록 상태 업데이트
         Service -> MinutesRepo: finalize(minutesId, version)
         activate MinutesRepo
-        MinutesRepo -> DB: UPDATE minutes\nSET status = 'FINALIZED',\n    version = ?,\n    finalizedAt = NOW(),\n    finalizedBy = ?\nWHERE id = ?
+        MinutesRepo -> DB: 회의록 확정 상태 업데이트
         activate DB
         DB --> MinutesRepo: 업데이트 완료
         deactivate DB
@@ -92,7 +116,7 @@ else 확정 가능
         ' 회의록 스냅샷 저장 (버전 관리)
         Service -> MinutesRepo: saveSnapshot(minutesId, version, content)
         activate MinutesRepo
-        MinutesRepo -> DB: INSERT INTO minutes_snapshots\n(minutesId, version, content, createdAt)
+        MinutesRepo -> DB: 회의록 스냅샷 저장
         activate DB
         DB --> MinutesRepo: 스냅샷 저장 완료
         deactivate DB
diff --git a/design/backend/sequence/inner/meeting-회의시작.puml b/design/backend/sequence/inner/meeting-회의시작.puml
index 1ad0709..b77a769 100644
--- a/design/backend/sequence/inner/meeting-회의시작.puml
+++ b/design/backend/sequence/inner/meeting-회의시작.puml
@@ -34,15 +34,20 @@ deactivate Cache
 alt Cache Miss
     Service -> MeetingRepo: findById(meetingId)
     activate MeetingRepo
-    MeetingRepo -> DB: SELECT * FROM meetings\nWHERE id = ?
+    MeetingRepo -> DB: 회의 정보 조회
     activate DB
     DB --> MeetingRepo: 회의 정보
     deactivate DB
     MeetingRepo --> Service: Meeting
     deactivate MeetingRepo
 
-    Service -> Cache: SET meeting:info:{meetingId}
+    Service -> Cache: SET meeting:info:{meetingId}\n(TTL: 10분)
     activate Cache
+    note right of Cache
+      회의 정보 캐싱:
+      - TTL: 10분
+      - 자동 만료
+    end note
     Cache --> Service: 캐싱 완료
     deactivate Cache
 end
@@ -61,6 +66,18 @@ Service -> Service: 회의 상태 확인
 
 alt 회의가 이미 진행 중
     Service --> Controller: 409 Conflict\n이미 진행 중인 회의
+    note right
+      에러 응답 형식:
+      {
+        "error": {
+          "code": "MEETING_ALREADY_IN_PROGRESS",
+          "message": "이미 진행 중인 회의입니다",
+          "details": "해당 회의는 현재 진행 중 상태입니다",
+          "timestamp": "2025-10-23T12:00:00Z",
+          "path": "/api/meetings/{meetingId}/start"
+        }
+      }
+    end note
     return 409 Conflict
 else 시작 가능
     Service -> Service: 회의 세션 생성
@@ -78,7 +95,7 @@ else 시작 가능
     - status: ACTIVE
     end note
 
-    SessionRepo -> DB: INSERT INTO meeting_sessions\n(id, meetingId, startedBy, startedAt, status)
+    SessionRepo -> DB: 회의 세션 생성
     activate DB
     DB --> SessionRepo: 세션 생성 완료
     deactivate DB
@@ -88,7 +105,7 @@ else 시작 가능
     ' 회의 상태 업데이트
     Service -> MeetingRepo: updateStatus(meetingId, "IN_PROGRESS")
     activate MeetingRepo
-    MeetingRepo -> DB: UPDATE meetings\nSET status = 'IN_PROGRESS',\n    actualStartTime = NOW()\nWHERE id = ?
+    MeetingRepo -> DB: 회의 상태를 'IN_PROGRESS'로 변경하고 실제 시작 시간 기록
     activate DB
     DB --> MeetingRepo: 업데이트 완료
     deactivate DB
@@ -106,7 +123,7 @@ else 시작 가능
 
     Service -> MeetingRepo: createMinutesDraft(meetingId, sessionId)
     activate MeetingRepo
-    MeetingRepo -> DB: INSERT INTO minutes\n(id, meetingId, sessionId, status, createdAt)\nVALUES (?, ?, ?, 'DRAFT', NOW())
+    MeetingRepo -> DB: 회의록 초안 생성 (상태: DRAFT)
     activate DB
     DB --> MeetingRepo: 회의록 생성 완료
     deactivate DB
diff --git a/design/backend/sequence/inner/meeting-회의예약.puml b/design/backend/sequence/inner/meeting-회의예약.puml
index e1a35d1..f297424 100644
--- a/design/backend/sequence/inner/meeting-회의예약.puml
+++ b/design/backend/sequence/inner/meeting-회의예약.puml
@@ -42,7 +42,7 @@ Service -> Service: 회의 시간 유효성 검사
 
 Service -> Repo: checkConflictingMeetings(userId, startTime, endTime)
 activate Repo
-Repo -> DB: SELECT COUNT(*) FROM meetings\nWHERE creatorId = ?\nAND status = 'SCHEDULED'\nAND (startTime <= ? AND endTime >= ?)
+Repo -> DB: 중복 회의 확인
 activate DB
 DB --> Repo: 중복 회의 개수
 deactivate DB
@@ -51,6 +51,18 @@ deactivate Repo
 
 alt 중복 회의 존재
     Service --> Controller: 409 Conflict\n중복된 회의 시간
+    note right
+      에러 응답 형식:
+      {
+        "error": {
+          "code": "MEETING_TIME_CONFLICT",
+          "message": "중복된 회의 시간이 존재합니다",
+          "details": "해당 시간대에 이미 예약된 회의가 있습니다",
+          "timestamp": "2025-10-23T12:00:00Z",
+          "path": "/api/meetings"
+        }
+      }
+    end note
     return 409 Conflict
 else 중복 없음
     Service -> Service: Meeting 엔티티 생성\n- 회의 ID 생성\n- 상태: SCHEDULED\n- 생성자 정보 설정
@@ -58,7 +70,7 @@ else 중복 없음
     ' 회의 정보 저장
     Service -> Repo: save(meeting)
     activate Repo
-    Repo -> DB: INSERT INTO meetings\n(id, title, startTime, endTime,\nlocation, status, creatorId, createdAt)
+    Repo -> DB: 회의 정보 저장
     activate DB
     DB --> Repo: 회의 저장 완료
     deactivate DB
@@ -68,7 +80,7 @@ else 중복 없음
     ' 참석자 저장
     Service -> ParticipantRepo: saveAll(participants)
     activate ParticipantRepo
-    ParticipantRepo -> DB: INSERT INTO participants\n(meetingId, email, role, status)
+    ParticipantRepo -> DB: 참석자 정보 저장
     activate DB
     DB --> ParticipantRepo: 참석자 저장 완료
     deactivate DB
diff --git a/design/backend/sequence/inner/meeting-회의종료.puml b/design/backend/sequence/inner/meeting-회의종료.puml
index 0805d74..a28c022 100644
--- a/design/backend/sequence/inner/meeting-회의종료.puml
+++ b/design/backend/sequence/inner/meeting-회의종료.puml
@@ -33,7 +33,7 @@ activate Service
 ' 회의 정보 조회
 Service -> MeetingRepo: findById(meetingId)
 activate MeetingRepo
-MeetingRepo -> DB: SELECT * FROM meetings WHERE id = ?
+MeetingRepo -> DB: 회의 정보 조회\n(회의ID 기준)
 activate DB
 DB --> MeetingRepo: 회의 정보
 deactivate DB
@@ -53,12 +53,24 @@ Service -> Service: 회의 상태 확인
 
 alt 회의가 진행 중이 아님
     Service --> Controller: 409 Conflict\n진행 중인 회의가 아님
+    note right
+      에러 응답 형식:
+      {
+        "error": {
+          "code": "MEETING_NOT_IN_PROGRESS",
+          "message": "진행 중인 회의가 아닙니다",
+          "details": "회의 종료는 진행 중 상태에서만 가능합니다",
+          "timestamp": "2025-10-23T12:00:00Z",
+          "path": "/api/meetings/{meetingId}/end"
+        }
+      }
+    end note
     return 409 Conflict
 else 종료 가능
     ' 세션 정보 조회
     Service -> SessionRepo: findActiveSession(meetingId)
     activate SessionRepo
-    SessionRepo -> DB: SELECT * FROM meeting_sessions\nWHERE meetingId = ?\nAND status = 'ACTIVE'
+    SessionRepo -> DB: 활성 세션 조회\n(회의ID, 상태='진행중')
     activate DB
     DB --> SessionRepo: 세션 정보
     deactivate DB
@@ -68,7 +80,7 @@ else 종료 가능
     ' 세션 종료
     Service -> SessionRepo: endSession(sessionId)
     activate SessionRepo
-    SessionRepo -> DB: UPDATE meeting_sessions\nSET status = 'ENDED',\n    endedAt = NOW()\nWHERE id = ?
+    SessionRepo -> DB: 세션 종료 처리\n(상태='종료', 종료일시)
     activate DB
     DB --> SessionRepo: 업데이트 완료
     deactivate DB
@@ -78,7 +90,7 @@ else 종료 가능
     ' 회의 상태 업데이트
     Service -> MeetingRepo: updateStatus(meetingId, "ENDED")
     activate MeetingRepo
-    MeetingRepo -> DB: UPDATE meetings\nSET status = 'ENDED',\n    actualEndTime = NOW()\nWHERE id = ?
+    MeetingRepo -> DB: 회의 상태 업데이트\n(상태='종료', 실제종료시각)
     activate DB
     DB --> MeetingRepo: 업데이트 완료
     deactivate DB
@@ -97,12 +109,12 @@ else 종료 가능
     Service -> StatService: generateMeetingStatistics(sessionId)
     activate StatService
 
-    StatService -> DB: SELECT\n  COUNT(DISTINCT speakerId) as speakerCount,\n  COUNT(*) as utteranceCount,\n  TIMESTAMPDIFF(MINUTE, startedAt, endedAt) as duration\nFROM transcripts WHERE sessionId = ?
+    StatService -> DB: 회의 통계 데이터 조회\n(화자수, 발언횟수, 진행시간)
     activate DB
     DB --> StatService: 통계 데이터
     deactivate DB
 
-    StatService -> DB: INSERT INTO meeting_statistics\n(meetingId, sessionId, duration,\nparticipantCount, utteranceCount, createdAt)
+    StatService -> DB: 회의 통계 저장\n(회의ID, 세션ID, 진행시간, 참석자수, 발언횟수)
     activate DB
     DB --> StatService: 통계 저장 완료
     deactivate DB
@@ -124,7 +136,7 @@ else 종료 가능
 
     AISuggestion -> SuggestionRepo: findAppliedSuggestions(meetingId)
     activate SuggestionRepo
-    SuggestionRepo -> DB: SELECT *\nFROM ai_suggestions\nWHERE meeting_id = ?\nAND status = 'APPLIED'\nORDER BY suggestion_type, applied_at
+    SuggestionRepo -> DB: 적용된 AI 제안 조회\n(회의ID, 상태='적용됨', 유형별 정렬)
     activate DB
     note right
       조회 대상:
@@ -144,7 +156,7 @@ else 종료 가능
     ' 2. 회의록 조회
     Service -> MinutesRepo: findByMeetingId(meetingId)
     activate MinutesRepo
-    MinutesRepo -> DB: SELECT * FROM minutes\nWHERE meeting_id = ?
+    MinutesRepo -> DB: 회의록 정보 조회\n(회의ID 기준)
     activate DB
     DB --> MinutesRepo: 회의록 정보
     deactivate DB
@@ -172,7 +184,7 @@ else 종료 가능
 
         MinutesService -> MinutesRepo: getSectionContent(minutesId, sectionType)
         activate MinutesRepo
-        MinutesRepo -> DB: SELECT section_content\nFROM minutes_sections\nWHERE minutes_id = ?\nAND section_type = ?
+        MinutesRepo -> DB: 회의록 섹션 내용 조회\n(회의록ID, 섹션유형)
         activate DB
         DB --> MinutesRepo: 기존 섹션 내용
         deactivate DB
@@ -191,7 +203,7 @@ else 종료 가능
 
         MinutesService -> MinutesRepo: updateSectionContent(minutesId, sectionType, mergedContent)
         activate MinutesRepo
-        MinutesRepo -> DB: UPDATE minutes_sections\nSET section_content = ?,\n    updated_at = NOW(),\n    ai_enhanced = true\nWHERE minutes_id = ?\nAND section_type = ?
+        MinutesRepo -> DB: 회의록 섹션 내용 업데이트\n(병합된 내용, AI보강 플래그, 갱신일시)
         activate DB
         note right
           저장 내용:
@@ -212,7 +224,7 @@ else 종료 가능
     ' 4. AI 제안 상태 업데이트 (APPLIED → MERGED)
     Service -> SuggestionRepo: updateSuggestionsStatus(appliedSuggestions, "MERGED")
     activate SuggestionRepo
-    SuggestionRepo -> DB: UPDATE ai_suggestions\nSET status = 'MERGED',\n    merged_at = NOW()\nWHERE id IN (...)
+    SuggestionRepo -> DB: AI 제안 상태 업데이트\n(상태='병합완료', 병합일시)
     activate DB
     note right
       상태 변경:
@@ -228,7 +240,7 @@ else 종료 가능
     ' 회의록 상태 업데이트
     Service -> MinutesRepo: updateMinutesStatus(meetingId, "DRAFT")
     activate MinutesRepo
-    MinutesRepo -> DB: UPDATE minutes\nSET status = 'DRAFT',\n    endedAt = NOW(),\n    ai_suggestions_merged = true,\n    merged_count = ?\nWHERE meetingId = ?\nAND status = 'IN_PROGRESS'
+    MinutesRepo -> DB: 회의록 상태 업데이트\n(상태='초안', 종료일시, AI제안병합 플래그, 병합건수)
     activate DB
     note right
       회의록 완성도 표시:
diff --git a/design/backend/sequence/inner/notification-Todo알림발송.puml b/design/backend/sequence/inner/notification-Todo알림발송.puml
index 766af50..dbc32db 100644
--- a/design/backend/sequence/inner/notification-Todo알림발송.puml
+++ b/design/backend/sequence/inner/notification-Todo알림발송.puml
@@ -35,7 +35,7 @@ activate Service
 Service -> Repository: createNotification(todoId, "TODO_ASSIGNED", assignee)
 activate Repository
 
-Repository -> DB: INSERT INTO notifications\n(notification_id, todo_id,\ntype='TODO_ASSIGNED',\nstatus='PENDING',\nrecipients,\ncreated_at)
+Repository -> DB: 알림 정보 생성\n(알림ID, TodoID, 유형, 상태, 수신자, 생성일시)
 activate DB
 DB --> Repository: notificationId 반환
 deactivate DB
@@ -86,7 +86,7 @@ alt 발송 성공
 
     Service -> Repository: updateNotificationStatus(notificationId, "SENT")
     activate Repository
-    Repository -> DB: UPDATE notifications\nSET status='SENT',\nsent_at=NOW()\nWHERE notification_id='{notificationId}'
+    Repository -> DB: 알림 상태 업데이트\n(상태=발송완료, 발송일시=현재시각)
     activate DB
     DB --> Repository: 업데이트 완료
     deactivate DB
@@ -98,7 +98,7 @@ else 발송 실패
 
     Service -> Repository: updateNotificationStatus(notificationId, "FAILED")
     activate Repository
-    Repository -> DB: UPDATE notifications\nSET status='FAILED',\nerror_message='{errorMessage}'\nWHERE notification_id='{notificationId}'
+    Repository -> DB: 알림 상태 업데이트\n(상태=발송실패, 오류메시지=에러내용)
     activate DB
     DB --> Repository: 업데이트 완료
     deactivate DB
diff --git a/design/backend/sequence/inner/notification-리마인더발송.puml b/design/backend/sequence/inner/notification-리마인더발송.puml
index edcd86c..db22aa3 100644
--- a/design/backend/sequence/inner/notification-리마인더발송.puml
+++ b/design/backend/sequence/inner/notification-리마인더발송.puml
@@ -29,7 +29,7 @@ loop 각 회의별
     Service -> Repository: checkReminderSent(meetingId)
     activate Repository
 
-    Repository -> DB: SELECT * FROM notifications\nWHERE meeting_id='{meetingId}'\nAND type='REMINDER'
+    Repository -> DB: 리마인더 알림 조회\n(회의ID, 유형='REMINDER')
     activate DB
     DB --> Repository: 조회 결과
     deactivate DB
@@ -46,7 +46,7 @@ loop 각 회의별
         Service -> Repository: createNotification(meetingId, "REMINDER", participants)
         activate Repository
 
-        Repository -> DB: INSERT INTO notifications\n(notification_id, meeting_id,\ntype='REMINDER',\nstatus='PENDING',\nrecipients,\ncreated_at)
+        Repository -> DB: 리마인더 알림 생성\n(알림ID, 회의ID, 유형, 상태, 수신자, 생성일시)
         activate DB
         DB --> Repository: notificationId 반환
         deactivate DB
@@ -97,7 +97,7 @@ loop 각 회의별
 
                 Service -> Repository: updateRecipientStatus(notificationId, recipient, "SENT")
                 activate Repository
-                Repository -> DB: UPDATE notification_recipients\nSET status='SENT', sent_at=NOW()
+                Repository -> DB: 수신자별 알림 상태 업데이트\n(상태='발송완료', 발송일시=현재시각)
                 activate DB
                 DB --> Repository: 업데이트 완료
                 deactivate DB
@@ -109,7 +109,7 @@ loop 각 회의별
 
                 Service -> Repository: updateRecipientStatus(notificationId, recipient, "FAILED")
                 activate Repository
-                Repository -> DB: UPDATE notification_recipients\nSET status='FAILED'
+                Repository -> DB: 수신자별 알림 상태 업데이트\n(상태='발송실패')
                 activate DB
                 DB --> Repository: 업데이트 완료
                 deactivate DB
@@ -127,7 +127,7 @@ loop 각 회의별
         Service -> Repository: updateNotificationStatus(notificationId, finalStatus)
         activate Repository
 
-        Repository -> DB: UPDATE notifications\nSET status='{finalStatus}',\ncompleted_at=NOW(),\nsent_count={sentCount},\nfailed_count={failedCount}
+        Repository -> DB: 알림 최종 상태 업데이트\n(상태, 완료일시, 발송건수, 실패건수)
         activate DB
         DB --> Repository: 업데이트 완료
         deactivate DB
diff --git a/design/backend/sequence/inner/notification-알림발송.puml b/design/backend/sequence/inner/notification-알림발송.puml
index 6048097..fa71196 100644
--- a/design/backend/sequence/inner/notification-알림발송.puml
+++ b/design/backend/sequence/inner/notification-알림발송.puml
@@ -27,7 +27,7 @@ activate Service
 
 Service -> Repository: checkDuplicateNotification(eventId)
 activate Repository
-Repository -> DB: SELECT * FROM notifications\nWHERE event_id = ?
+Repository -> DB: 알림 중복 확인 조회\n(이벤트ID 기준)
 note right
   중복 발송 방지:
   - Event ID 기반
@@ -58,7 +58,7 @@ else 신규 이벤트
 
     Service -> Repository: getUserPreferences(userId)
     activate Repository
-    Repository -> DB: SELECT * FROM user_notification_prefs\nWHERE user_id = ?
+    Repository -> DB: 사용자 알림 설정 조회\n(사용자ID 기준)
     note right
       사용자 설정 확인:
       - 알림 채널 (email/sms)
@@ -139,7 +139,7 @@ else 신규 이벤트
 
         Service -> Repository: saveNotificationLog(notification)
         activate Repository
-        Repository -> DB: INSERT INTO notifications\n(event_id, user_id, type, channel, status, sent_at)
+        Repository -> DB: 알림 이력 저장\n(이벤트ID, 사용자ID, 유형, 채널, 상태, 발송일시)
         note right
           알림 로그 저장:
           - 발송 이력
@@ -152,7 +152,7 @@ else 신규 이벤트
 
         Service -> Repository: updateUserActivity(userId, "NOTIFICATION_SENT")
         activate Repository
-        Repository -> DB: INSERT INTO user_activities\n(user_id, activity_type, details)
+        Repository -> DB: 사용자 활동 이력 저장\n(사용자ID, 활동유형, 상세내용)
         DB --> Repository: saved
         Repository --> Service: updated
         deactivate Repository
diff --git a/design/backend/sequence/inner/notification-초대알림발송.puml b/design/backend/sequence/inner/notification-초대알림발송.puml
index e376809..29bea4b 100644
--- a/design/backend/sequence/inner/notification-초대알림발송.puml
+++ b/design/backend/sequence/inner/notification-초대알림발송.puml
@@ -34,7 +34,7 @@ activate Service
 Service -> Repository: createNotification(meetingId, "INVITATION", participants)
 activate Repository
 
-Repository -> DB: INSERT INTO notifications\n(notification_id, meeting_id,\ntype='INVITATION',\nstatus='PENDING',\nrecipients,\ncreated_at)
+Repository -> DB: 초대 알림 생성\n(알림ID, 회의ID, 유형, 상태, 수신자, 생성일시)
 activate DB
 DB --> Repository: notificationId 반환
 deactivate DB
@@ -86,7 +86,7 @@ loop 각 참석자별
 
         Service -> Repository: updateRecipientStatus(notificationId, recipient, "SENT")
         activate Repository
-        Repository -> DB: UPDATE notification_recipients\nSET status='SENT', sent_at=NOW()\nWHERE notification_id='{notificationId}'\nAND recipient='{email}'
+        Repository -> DB: 수신자별 알림 상태 업데이트\n(상태='발송완료', 발송일시=현재시각)
         activate DB
         DB --> Repository: 업데이트 완료
         deactivate DB
@@ -98,7 +98,7 @@ loop 각 참석자별
 
         Service -> Repository: updateRecipientStatus(notificationId, recipient, "FAILED")
         activate Repository
-        Repository -> DB: UPDATE notification_recipients\nSET status='FAILED',\nerror_message='{errorMessage}'\nWHERE notification_id='{notificationId}'\nAND recipient='{email}'
+        Repository -> DB: 수신자별 알림 상태 업데이트\n(상태='발송실패', 오류메시지=에러내용)
         activate DB
         DB --> Repository: 업데이트 완료
         deactivate DB
@@ -116,7 +116,7 @@ end
 Service -> Repository: updateNotificationStatus(notificationId, finalStatus)
 activate Repository
 
-Repository -> DB: UPDATE notifications\nSET status='{finalStatus}',\ncompleted_at=NOW(),\nsent_count={sentCount},\nfailed_count={failedCount}\nWHERE notification_id='{notificationId}'
+Repository -> DB: 알림 최종 상태 업데이트\n(상태, 완료일시, 발송건수, 실패건수)
 activate DB
 DB --> Repository: 업데이트 완료
 deactivate DB
diff --git a/design/backend/sequence/inner/stt-음성녹음시작.puml b/design/backend/sequence/inner/stt-음성녹음시작.puml
index 6f54fee..5cc2ce4 100644
--- a/design/backend/sequence/inner/stt-음성녹음시작.puml
+++ b/design/backend/sequence/inner/stt-음성녹음시작.puml
@@ -28,7 +28,7 @@ end note
 Service -> Repository: createRecording(meetingId, sessionId)
 activate Repository
 
-Repository -> DB: INSERT INTO recordings\n(recording_id, meeting_id, session_id,\nstatus='READY', created_at)
+Repository -> DB: 녹음 세션 생성\n(녹음ID, 회의ID, 세션ID, 상태, 생성일시)
 activate DB
 DB --> Repository: recordingId 반환
 deactivate DB
@@ -62,7 +62,7 @@ deactivate AzureClient
 Service -> Repository: updateRecordingStatus(recordingId, "RECORDING")
 activate Repository
 
-Repository -> DB: UPDATE recordings\nSET status='RECORDING',\nstarted_at=NOW(),\nstorage_path='{blobUrl}'\nWHERE recording_id='{recordingId}'
+Repository -> DB: 녹음 상태 업데이트\n(상태='녹음중', 시작일시, 저장경로)
 activate DB
 DB --> Repository: 업데이트 완료
 deactivate DB
diff --git a/design/backend/sequence/inner/stt-음성녹음인식.puml b/design/backend/sequence/inner/stt-음성녹음인식.puml
index 137c63c..68d5ae8 100644
--- a/design/backend/sequence/inner/stt-음성녹음인식.puml
+++ b/design/backend/sequence/inner/stt-음성녹음인식.puml
@@ -21,7 +21,7 @@ activate Service
 
 Service -> Repository: findMeetingById(meetingId)
 activate Repository
-Repository -> DB: SELECT * FROM meetings\nWHERE meeting_id = ?
+Repository -> DB: 회의 정보 조회\n(회의ID 기준)
 DB --> Repository: meeting data
 Repository --> Service: Meeting entity
 deactivate Repository
@@ -54,7 +54,7 @@ deactivate Speaker
 
 Service -> Repository: saveSttSession(session)
 activate Repository
-Repository -> DB: INSERT INTO stt_sessions\n(meeting_id, status, started_at)
+Repository -> DB: STT 세션 저장\n(회의ID, 상태, 시작일시)
 DB --> Repository: session saved
 Repository --> Service: SttSession entity
 deactivate Repository
@@ -103,7 +103,7 @@ deactivate Speaker
 
 Service -> Repository: saveSttSegment(segment)
 activate Repository
-Repository -> DB: INSERT INTO stt_segments\n(session_id, text, speaker_id, timestamp)
+Repository -> DB: STT 세그먼트 저장\n(세션ID, 텍스트, 화자ID, 타임스탬프)
 DB --> Repository: segment saved
 Repository --> Service: saved
 deactivate Repository
diff --git a/design/backend/sequence/inner/stt-음성텍스트변환.puml b/design/backend/sequence/inner/stt-음성텍스트변환.puml
index b8e817f..a377d46 100644
--- a/design/backend/sequence/inner/stt-음성텍스트변환.puml
+++ b/design/backend/sequence/inner/stt-음성텍스트변환.puml
@@ -55,7 +55,7 @@ end note
 Service -> TranscriptRepo: createTranscript(recordingId, text, metadata)
 activate TranscriptRepo
 
-TranscriptRepo -> DB: INSERT INTO transcripts\n(transcript_id, recording_id, speaker_id,\ntext, confidence, timestamp, warning_flag,\ncreated_at)
+TranscriptRepo -> DB: 변환 결과 저장\n(텍스트ID, 녹음ID, 화자ID, 텍스트, 신뢰도, 타임스탬프, 경고플래그)
 activate DB
 DB --> TranscriptRepo: transcriptId 반환
 deactivate DB
@@ -68,7 +68,7 @@ deactivate TranscriptRepo
 Service -> RecordingRepo: updateSpeakerInfo(recordingId, speakerId)
 activate RecordingRepo
 
-RecordingRepo -> DB: INSERT INTO speakers\n(recording_id, speaker_id, segment_count)\nON CONFLICT UPDATE segment_count
+RecordingRepo -> DB: 화자 정보 저장/업데이트\n(녹음ID, 화자ID, 세그먼트수)
 activate DB
 DB --> RecordingRepo: 업데이트 완료
 deactivate DB
diff --git a/design/backend/sequence/inner/stt-텍스트변환.puml b/design/backend/sequence/inner/stt-텍스트변환.puml
index e593ca5..c234277 100644
--- a/design/backend/sequence/inner/stt-텍스트변환.puml
+++ b/design/backend/sequence/inner/stt-텍스트변환.puml
@@ -20,7 +20,7 @@ activate Service
 
 Service -> Repository: findSessionById(sessionId)
 activate Repository
-Repository -> DB: SELECT * FROM stt_sessions\nWHERE session_id = ?
+Repository -> DB: STT 세션 조회\n(세션ID 기준)
 DB --> Repository: session data
 Repository --> Service: SttSession entity
 deactivate Repository
@@ -62,7 +62,7 @@ alt 실시간 변환 모드
 
         Service -> Repository: saveSttSegment(segment)
         activate Repository
-        Repository -> DB: INSERT INTO stt_segments\n(session_id, text, confidence, timestamp)
+        Repository -> DB: STT 세그먼트 저장\n(세션ID, 텍스트, 신뢰도, 타임스탬프)
         DB --> Repository: saved
         Repository --> Service: segment saved
         deactivate Repository
@@ -99,7 +99,7 @@ else 배치 변환 모드
 
     Service -> Repository: updateSessionStatus(sessionId, "PROCESSING")
     activate Repository
-    Repository -> DB: UPDATE stt_sessions\nSET status = 'PROCESSING'
+    Repository -> DB: 세션 상태 업데이트\n(상태='처리중')
     DB --> Repository: updated
     Repository --> Service: updated
     deactivate Repository
@@ -107,7 +107,7 @@ end
 
 Service -> Repository: aggregateTranscription(sessionId)
 activate Repository
-Repository -> DB: SELECT text, timestamp\nFROM stt_segments\nWHERE session_id = ?\nORDER BY timestamp
+Repository -> DB: 세그먼트 목록 조회\n(세션ID 기준, 타임스탬프 순 정렬)
 DB --> Repository: segments
 Repository --> Service: ordered segments
 deactivate Repository
@@ -122,7 +122,7 @@ end note
 
 Service -> Repository: saveTranscription(fullText)
 activate Repository
-Repository -> DB: UPDATE stt_sessions\nSET full_text = ?,\nstatus = 'COMPLETED'
+Repository -> DB: 전체 텍스트 저장 및 상태 업데이트\n(전체텍스트, 상태='완료')
 DB --> Repository: saved
 Repository --> Service: updated session
 deactivate Repository
diff --git a/design/backend/sequence/inner/user-대시보드조회.puml b/design/backend/sequence/inner/user-대시보드조회.puml
index 4f71532..0becaee 100644
--- a/design/backend/sequence/inner/user-대시보드조회.puml
+++ b/design/backend/sequence/inner/user-대시보드조회.puml
@@ -12,10 +12,16 @@ participant "UserRepository" as Repository
 database "PostgreSQL<<E>>" as DB
 database "Redis Cache<<E>>" as Cache
 
-Gateway -> Controller: GET /api/v1/dashboard\nAuthorization: Bearer {token}
+Gateway -> Controller: GET /api/dashboard?\npage=1&size=10&sort=createdAt,desc\nAuthorization: Bearer {token}
+note right
+  페이지네이션 파라미터:
+  - page: 페이지 번호 (기본값: 1)
+  - size: 페이지 크기 (기본값: 10)
+  - sort: 정렬 기준 (기본값: createdAt,desc)
+end note
 activate Controller
 
-Controller -> Service: getDashboard(userId)
+Controller -> Service: getDashboard(userId, page, size, sort)
 activate Service
 
 Service -> Cache: get("dashboard:" + userId)
@@ -28,10 +34,10 @@ end note
 alt 캐시 존재
     Cache --> Service: cached dashboard data
 
-    Service --> Controller: DashboardResponse
+    Service --> Controller: DashboardResponse\n{meetings, todos, activities, stats, pagination}
     deactivate Service
 
-    Controller --> Gateway: 200 OK\n{dashboard data}
+    Controller --> Gateway: 200 OK\n{dashboard data + pagination}
     deactivate Controller
 
 else 캐시 미존재
@@ -62,14 +68,14 @@ else 캐시 미존재
     else
         Service -> Repository: getRecentActivities(userId)
         activate Repository
-        Repository -> DB: SELECT * FROM user_activities\nWHERE user_id = ?\nORDER BY created_at DESC\nLIMIT 10
+        Repository -> DB: 최근 활동 내역 조회\n(사용자ID, 최신순 정렬, 10건)
         DB --> Repository: activities
         Repository --> Service: recent activities
         deactivate Repository
     else
         Service -> Repository: getUserStatistics(userId)
         activate Repository
-        Repository -> DB: SELECT\n  COUNT(DISTINCT meeting_id) as total_meetings,\n  COUNT(DISTINCT todo_id) as total_todos,\n  AVG(meeting_duration) as avg_duration\nFROM user_statistics\nWHERE user_id = ?
+        Repository -> DB: 사용자 통계 조회\n(총 회의수, 총 할일수, 평균 회의시간)
         DB --> Repository: statistics
         Repository --> Service: user statistics
         deactivate Repository
@@ -100,10 +106,26 @@ else 캐시 미존재
     end note
     Cache --> Service: cached
 
-    Service --> Controller: DashboardResponse\n{meetings, todos, activities, stats}
+    Service --> Controller: DashboardResponse\n{meetings, todos, activities, stats, pagination}
     deactivate Service
 
-    Controller --> Gateway: 200 OK\n{dashboard data}
+    Controller --> Gateway: 200 OK\n{dashboard data + pagination}
+    note right
+      응답 형식:
+      {
+        "upcomingMeetings": [...],
+        "activeTodos": [...],
+        "recentActivities": [...],
+        "statistics": {...},
+        "pagination": {
+          "page": 1,
+          "size": 10,
+          "totalElements": 45,
+          "totalPages": 5,
+          "hasNext": true
+        }
+      }
+    end note
     deactivate Controller
 end
 
diff --git a/design/backend/sequence/inner/user-사용자인증.puml b/design/backend/sequence/inner/user-사용자인증.puml
index c33e425..6d99068 100644
--- a/design/backend/sequence/inner/user-사용자인증.puml
+++ b/design/backend/sequence/inner/user-사용자인증.puml
@@ -49,12 +49,12 @@ alt 인증 성공
 
     Service -> Repository: findByUsername(username)
     activate Repository
-    Repository -> DB: SELECT * FROM users\nWHERE username = ?
+    Repository -> DB: 사용자 정보 조회\n(사용자명 기준)
 
     alt 사용자 존재
         DB --> Repository: user data
     else 신규 사용자
-        Repository -> DB: INSERT INTO users\n(username, email, department)
+        Repository -> DB: 신규 사용자 등록\n(사용자명, 이메일, 부서)
         DB --> Repository: user created
         note right
           LDAP 정보 동기화:
@@ -107,7 +107,7 @@ alt 인증 성공
 
     Service -> Repository: updateLastLogin(userId)
     activate Repository
-    Repository -> DB: UPDATE users\nSET last_login_at = NOW()
+    Repository -> DB: 최종 로그인 일시 업데이트\n(현재시각)
     DB --> Repository: updated
     Repository --> Service: updated
     deactivate Repository
@@ -125,10 +125,10 @@ else 인증 실패
 
     Service -> Repository: incrementFailedAttempts(username)
     activate Repository
-    Repository -> DB: UPDATE users\nSET failed_attempts = failed_attempts + 1
+    Repository -> DB: 실패 횟수 증가\n(failed_attempts + 1)
 
     alt 실패 횟수 초과 (5회)
-        Repository -> DB: UPDATE users\nSET locked_until = NOW() + INTERVAL '30 minutes'
+        Repository -> DB: 계정 잠금 설정\n(잠금시간=현재+30분)
         note right
           계정 잠금:
           - 5회 실패 시
@@ -143,7 +143,19 @@ else 인증 실패
     Service --> Controller: AuthenticationException
     deactivate Service
 
-    Controller --> Gateway: 401 Unauthorized\n{error: "Invalid credentials"}
+    Controller --> Gateway: 401 Unauthorized
+    note right
+      에러 응답 형식:
+      {
+        "error": {
+          "code": "AUTHENTICATION_FAILED",
+          "message": "인증에 실패했습니다",
+          "details": "사용자명 또는 비밀번호가 올바르지 않습니다",
+          "timestamp": "2025-10-23T12:00:00Z",
+          "path": "/api/v1/auth/login"
+        }
+      }
+    end note
     deactivate Controller
 end
 
diff --git a/design/backend/sequence/outer/Todo완료및회의록반영.puml b/design/backend/sequence/outer/Todo완료및회의록반영.puml
index 06a2cb4..a9f4e80 100644
--- a/design/backend/sequence/outer/Todo완료및회의록반영.puml
+++ b/design/backend/sequence/outer/Todo완료및회의록반영.puml
@@ -10,6 +10,16 @@ participant "Meeting Service" as Meeting
 participant "Redis Cache" as Redis
 participant "Notification Service" as Notification
 
+note over Gateway
+  라우팅 규칙:
+  /api/meetings/** → Meeting Service
+  /api/minutes/** → Meeting Service
+  /api/dashboard → User Service
+  /api/notifications/** → Notification Service
+  /api/auth/** → User Service
+  /api/todos/** → Meeting Service
+end note
+
 autonumber
 
 == Todo 완료 처리 ==
diff --git a/design/backend/sequence/outer/대시보드조회.puml b/design/backend/sequence/outer/대시보드조회.puml
index 2f28e9c..7ccfd37 100644
--- a/design/backend/sequence/outer/대시보드조회.puml
+++ b/design/backend/sequence/outer/대시보드조회.puml
@@ -6,43 +6,59 @@ title 대시보드조회 외부 시퀀스
 actor "사용자" as User
 participant "Web App" as Frontend
 participant "API Gateway" as Gateway
-participant "Meeting Service" as Meeting
+participant "User Service" as UserService
 database "Redis Cache" as Cache
-database "Meeting DB" as MeetingDB
+database "User DB" as UserDB
+
+note over Gateway
+  라우팅 규칙:
+  /api/meetings/** → Meeting Service
+  /api/minutes/** → Meeting Service
+  /api/dashboard → User Service
+  /api/notifications/** → Notification Service
+  /api/auth/** → User Service
+  /api/todos/** → Meeting Service
+end note
 
 User -> Frontend: 대시보드 접근
 activate Frontend
 
-Frontend -> Gateway: GET /api/meetings/dashboard
+Frontend -> Gateway: GET /api/dashboard?\npage=1&size=10&sort=createdAt,desc
+note right
+  페이지네이션 파라미터:
+  - page: 페이지 번호 (기본값: 1)
+  - size: 페이지 크기 (기본값: 10)
+  - sort: 정렬 기준 (기본값: createdAt,desc)
+end note
 activate Gateway
 
-Gateway -> Meeting: GET /dashboard
-activate Meeting
+Gateway -> UserService: GET /dashboard?\npage=1&size=10&sort=createdAt,desc
+activate UserService
 
 ' 캐시 조회
-Meeting -> Cache: GET dashboard:{userId}
+UserService -> Cache: GET dashboard:{userId}
 activate Cache
-Cache --> Meeting: 캐시 조회 결과
+Cache --> UserService: 캐시 조회 결과
 deactivate Cache
 
 alt Cache Hit
-    Meeting -> Meeting: 캐시 데이터 반환
+    UserService -> UserService: 캐시 데이터 반환
 else Cache Miss
-    Meeting -> MeetingDB: 대시보드 데이터 조회\n- 예정된 회의 목록\n- 진행 중 Todo 목록\n- 최근 회의록 목록\n- 공유받은 회의록 목록\n- 통계 정보
-    activate MeetingDB
-    MeetingDB --> Meeting: 조회 결과
-    deactivate MeetingDB
+    UserService -> UserDB: 대시보드 데이터 조회\n- 예정된 회의 목록\n- 진행 중 Todo 목록\n- 최근 회의록 목록\n- 공유받은 회의록 목록\n- 통계 정보
+    activate UserDB
+    UserDB --> UserService: 조회 결과
+    deactivate UserDB
 
-    Meeting -> Cache: SET dashboard:{userId}\n(TTL: 5분)
+    UserService -> Cache: SET dashboard:{userId}\n(TTL: 5분)
     activate Cache
-    Cache --> Meeting: 캐시 저장 완료
+    Cache --> UserService: 캐시 저장 완료
     deactivate Cache
 end
 
-Meeting --> Gateway: 대시보드 데이터 응답\n{\n  "upcomingMeetings": [...],\n  "activeTodos": [...],\n  "recentMinutes": [...],\n  "sharedMinutes": [...],\n  "statistics": {...}\n}
-deactivate Meeting
+UserService --> Gateway: 대시보드 데이터 응답\n{\n  "upcomingMeetings": [...],\n  "activeTodos": [...],\n  "recentMinutes": [...],\n  "sharedMinutes": [...],\n  "statistics": {...},\n  "pagination": {\n    "page": 1,\n    "size": 10,\n    "totalElements": 45,\n    "totalPages": 5,\n    "hasNext": true\n  }\n}
+deactivate UserService
 
-Gateway --> Frontend: 200 OK\n대시보드 데이터
+Gateway --> Frontend: 200 OK\n대시보드 데이터 + 페이지네이션 정보
 deactivate Gateway
 
 Frontend -> Frontend: 대시보드 화면 렌더링\n- 예정된 회의 표시\n- Todo 목록 표시\n- 최근/공유 회의록 표시\n- 통계 차트 표시
diff --git a/design/backend/sequence/outer/회의록공유.puml b/design/backend/sequence/outer/회의록공유.puml
index eb09a83..9ee8d15 100644
--- a/design/backend/sequence/outer/회의록공유.puml
+++ b/design/backend/sequence/outer/회의록공유.puml
@@ -11,6 +11,16 @@ participant "Redis Cache" as Redis
 participant "Azure Event Hubs" as EventHub
 participant "Notification Service" as Notification
 
+note over Gateway
+  라우팅 규칙:
+  /api/meetings/** → Meeting Service
+  /api/minutes/** → Meeting Service
+  /api/dashboard → User Service
+  /api/notifications/** → Notification Service
+  /api/auth/** → User Service
+  /api/todos/** → Meeting Service
+end note
+
 == 회의록 공유 설정 ==
 User -> Web: 공유 버튼 클릭
 activate Web
diff --git a/design/backend/sequence/outer/회의록상세조회및수정.puml b/design/backend/sequence/outer/회의록상세조회및수정.puml
index 39e5d12..146fa68 100644
--- a/design/backend/sequence/outer/회의록상세조회및수정.puml
+++ b/design/backend/sequence/outer/회의록상세조회및수정.puml
@@ -12,6 +12,16 @@ database "Redis Cache" as Cache
 database "Meeting DB" as MeetingDB
 participant "WebSocket" as WS
 
+note over Gateway
+  라우팅 규칙:
+  /api/meetings/** → Meeting Service
+  /api/minutes/** → Meeting Service
+  /api/dashboard → User Service
+  /api/notifications/** → Notification Service
+  /api/auth/** → User Service
+  /api/todos/** → Meeting Service
+end note
+
 == 회의록 상세 조회 ==
 
 User -> Frontend: 회의록 클릭
diff --git a/design/backend/sequence/outer/회의시작및실시간회의록작성.puml b/design/backend/sequence/outer/회의시작및실시간회의록작성.puml
index d52726e..374225e 100644
--- a/design/backend/sequence/outer/회의시작및실시간회의록작성.puml
+++ b/design/backend/sequence/outer/회의시작및실시간회의록작성.puml
@@ -12,6 +12,16 @@ participant "AI Service" as AI
 database "Redis Cache" as Cache
 queue "Azure Event Hubs" as EventHub
 
+note over Gateway
+  라우팅 규칙:
+  /api/meetings/** → Meeting Service
+  /api/minutes/** → Meeting Service
+  /api/dashboard → User Service
+  /api/notifications/** → Notification Service
+  /api/auth/** → User Service
+  /api/todos/** → Meeting Service
+end note
+
 == 회의 시작 ==
 
 User -> Frontend: 회의 시작 버튼 클릭
diff --git a/design/backend/sequence/outer/회의예약및참석자초대.puml b/design/backend/sequence/outer/회의예약및참석자초대.puml
index 4a1a463..58eebe2 100644
--- a/design/backend/sequence/outer/회의예약및참석자초대.puml
+++ b/design/backend/sequence/outer/회의예약및참석자초대.puml
@@ -13,6 +13,16 @@ participant "Azure Event Hubs" as EventHub
 participant "Notification Service" as Notification
 participant "Email Service" as Email
 
+note over Gateway
+  라우팅 규칙:
+  /api/meetings/** → Meeting Service
+  /api/minutes/** → Meeting Service
+  /api/dashboard → User Service
+  /api/notifications/** → Notification Service
+  /api/auth/** → User Service
+  /api/todos/** → Meeting Service
+end note
+
 == 회의 예약 ==
 User -> WebApp: 회의 정보 입력\n(제목, 날짜/시간, 장소, 참석자)
 activate WebApp
diff --git a/design/backend/sequence/outer/회의종료및최종확정.puml b/design/backend/sequence/outer/회의종료및최종확정.puml
index 25f5d18..49656df 100644
--- a/design/backend/sequence/outer/회의종료및최종확정.puml
+++ b/design/backend/sequence/outer/회의종료및최종확정.puml
@@ -12,6 +12,16 @@ participant "AI Service" as AI
 participant "Notification Service" as Notification
 participant "Azure Event Hubs" as EventHub
 
+note over Gateway
+  라우팅 규칙:
+  /api/meetings/** → Meeting Service
+  /api/minutes/** → Meeting Service
+  /api/dashboard → User Service
+  /api/notifications/** → Notification Service
+  /api/auth/** → User Service
+  /api/todos/** → Meeting Service
+end note
+
 == 회의 종료 ==
 User -> WebApp: 회의 종료 버튼 클릭
 WebApp -> Gateway: POST /meetings/{meetingId}/end