diff --git a/.forge/iss-1b3092823a38-attempt-1.md b/.forge/iss-1b3092823a38-attempt-1.md
deleted file mode 100644
index 4aa3b04..0000000
--- a/.forge/iss-1b3092823a38-attempt-1.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# iss-1b3092823a38-attempt-1
-
-Forge 이슈 작업 브랜치 `forge/iss-1b3092823a38-attempt-1`.
diff --git a/docs/architecture/transaction-sequence.md b/docs/architecture/transaction-sequence.md
deleted file mode 100644
index 6a43240..0000000
--- a/docs/architecture/transaction-sequence.md
+++ /dev/null
@@ -1,34 +0,0 @@
-sequenceDiagram
-    participant User
-    participant Payment Service
-    participant DB
-    participant External Gateway
-
-    User->>Payment Service: Initiate Payment
-    activate Payment Service
-    Payment Service->>DB: Begin Transaction
-    activate DB
-    DB-->>Payment Service: Transaction Started
-    deactivate DB
-    Payment Service->>External Gateway: Request Payment Authorization
-    activate External Gateway
-
-    alt Successful Authorization
-        External Gateway-->>Payment Service: Authorization Success
-        Payment Service->>DB: Commit Transaction
-        activate DB
-        DB-->>Payment Service: Transaction Committed
-        deactivate DB
-        Payment Service-->>User: Payment Successful
-    else Authorization Failed
-        External Gateway-->>Payment Service: Authorization Failure
-        Payment Service->>DB: Rollback Transaction
-        activate DB
-        DB-->>Payment Service: Transaction Rolled Back
-        deactivate DB
-        Payment Service-->>User: Payment Failed
-    end
-
-autonumber
-
-