diff --git a/.forge/iss-3f29c0d83954-attempt-1-run-62fa40d5b77b.md b/.forge/iss-3f29c0d83954-attempt-1-run-62fa40d5b77b.md
deleted file mode 100644
index 7d13ace..0000000
--- a/.forge/iss-3f29c0d83954-attempt-1-run-62fa40d5b77b.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# iss-3f29c0d83954-attempt-1-run-62fa40d5b77b
-
-Forge 이슈 작업 브랜치 `forge/iss-3f29c0d83954-attempt-1-run-62fa40d5b77b`.
diff --git a/.forge/iss-bae72bbf49e3-attempt-4-run-503896c06e5d.md b/.forge/iss-bae72bbf49e3-attempt-4-run-503896c06e5d.md
new file mode 100644
index 0000000..63d6168
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+++ b/.forge/iss-bae72bbf49e3-attempt-4-run-503896c06e5d.md
@@ -0,0 +1,3 @@
+# iss-bae72bbf49e3-attempt-4-run-503896c06e5d
+
+Forge 이슈 작업 브랜치 `forge/iss-bae72bbf49e3-attempt-4-run-503896c06e5d`.
diff --git a/docs/architecture/package-map.md b/docs/architecture/package-map.md
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--- a/docs/architecture/package-map.md
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-# 패키지 맵
-
-| 패키지         | 책임                                           | 금지 의존성       |
-|----------------|----------------------------------------------|------------------|
-| controller      | 외부 요청 수신 및 처리                       | repository        |
-| service         | 비즈니스 로직 수행 및 데이터 처리           | integration       |
-| repository      | 데이터 저장소와의 상호작용                 | controller, domain |
-| domain          | 핵심 비즈니스 도메인 모델                  | integration       |
-| integration     | 외부 서비스와의 통신                       | controller, domain | 
-
diff --git a/docs/architecture/transaction-sequence.md b/docs/architecture/transaction-sequence.md
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+++ b/docs/architecture/transaction-sequence.md
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+```mermaid
+sequenceDiagram
+    participant User
+    participant PaymentGateway
+    participant Database
+    opt Successful Transaction
+        User->>PaymentGateway: Initiate Payment
+        PaymentGateway-->>User: Payment Confirmation
+        User->>Database: Update Transaction Record
+        Database-->>User: Transaction Updated
+        User->>User: Payment Succeeded
+    end
+    opt External Failure
+        User->>PaymentGateway: Initiate Payment
+        PaymentGateway-->>User: Payment Error
+        User->>User: Payment Failed
+    end
+    opt DB Failure
+        User->>PaymentGateway: Initiate Payment
+        PaymentGateway-->>User: Payment Confirmation
+        User->>Database: Update Transaction Record
+        Database-->>User: DB Error
+        User->>PaymentGateway: Cancel Transaction
+        PaymentGateway-->>User: Transaction Canceled
+    end
+    %% Commit and Rollback%%
+    Note over User, PaymentGateway: Commit after successful transaction
+    Note over User, Database: Rollback on DB failure
+```
\ No newline at end of file