diff --git a/.forge/iss-6f8eac22f6f0-attempt-1.md b/.forge/iss-6f8eac22f6f0-attempt-1.md
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--- a/.forge/iss-6f8eac22f6f0-attempt-1.md
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-# iss-6f8eac22f6f0-attempt-1
-
-Forge 이슈 작업 브랜치 `forge/iss-6f8eac22f6f0-attempt-1`.
diff --git a/docs/architecture/transaction-sequence.md b/docs/architecture/transaction-sequence.md
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-```mermaid
-sequenceDiagram
-    participant User
-    participant PaymentService
-    participant PaymentGateway
-    participant Database
-
-    %% 정상 흐름
-    User->>PaymentService: 결제 요청
-    PaymentService->>Database: 거래 데이터 저장
-    Database-->>PaymentService: 저장 완료
-    PaymentService->>PaymentGateway: 결제 요청
-    PaymentGateway-->>PaymentService: 결제 성공
-    PaymentService->>Database: 거래 완료 상태 업데이트
-    Database-->>PaymentService: 상태 업데이트 완료
-    PaymentService-->>User: 결제 성공 응답
-
-    %% 외부 실패 흐름
-    User->>PaymentService: 결제 요청
-    PaymentService->>Database: 거래 데이터 저장
-    Database-->>PaymentService: 저장 완료
-    PaymentService->>PaymentGateway: 결제 요청
-    PaymentGateway-->>PaymentService: 결제 실패
-    PaymentService->>Database: 거래 실패 상태 업데이트
-    Database-->>PaymentService: 상태 업데이트 완료
-    PaymentService-->>User: 결제 실패 응답
-
-    %% DB 실패 흐름
-    User->>PaymentService: 결제 요청
-    PaymentService->>Database: 거래 데이터 저장
-    Database-->>PaymentService: 저장 실패
-    PaymentService-->>User: 결제 실패 응답
-
-    %% commit 흐름
-    PaymentService->>Database: 커밋
-    Database-->>PaymentService: 커밋 완료
-
-    %% rollback 흐름
-    PaymentService->>Database: 롤백
-    Database-->>PaymentService: 롤백 완료
-```
\ No newline at end of file