diff --git a/.forge/iss-d65d495e8095-attempt-2.md b/.forge/iss-d65d495e8095-attempt-2.md
deleted file mode 100644
index d9920f7..0000000
--- a/.forge/iss-d65d495e8095-attempt-2.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# iss-d65d495e8095-attempt-2
-
-Forge 이슈 작업 브랜치 `forge/iss-d65d495e8095-attempt-2`.
diff --git a/docs/architecture/transaction-sequence.md b/docs/architecture/transaction-sequence.md
deleted file mode 100644
index f125812..0000000
--- a/docs/architecture/transaction-sequence.md
+++ /dev/null
@@ -1,19 +0,0 @@
-%%%{init: {'themeVariables': {'sequenceDiagramTheme': 'default'}}}%%%
-
-sequenceDiagram
-    participant User
-    participant PaymentGateway
-    participant Database
-
-    User->>PaymentGateway: Initiate Payment
-    alt Successful Payment
-        PaymentGateway->>Database: Commit Transaction
-        Database-->>PaymentGateway: Confirm Commit
-        PaymentGateway-->>User: Payment Success
-    else External Failure
-        PaymentGateway-->>User: Payment Failure
-    else DB Failure
-        PaymentGateway->>Database: Rollback Transaction
-        Database-->>PaymentGateway: Confirm Rollback
-        PaymentGateway-->>User: Payment Rollback
-    end
\ No newline at end of file