diff --git a/resources/global/en/piece-categories.yaml b/resources/global/en/piece-categories.yaml
index ded9597..d7fa452 100644
--- a/resources/global/en/piece-categories.yaml
+++ b/resources/global/en/piece-categories.yaml
@@ -1,8 +1,10 @@
 piece_categories:
   "🚀 Quick Start":
     pieces:
-      - minimal
       - default
+      - passthrough
+      - coding
+      - minimal
 
   "🔍 Review & Fix":
     pieces:
diff --git a/resources/global/en/pieces/passthrough.yaml b/resources/global/en/pieces/passthrough.yaml
new file mode 100644
index 0000000..801c12c
--- /dev/null
+++ b/resources/global/en/pieces/passthrough.yaml
@@ -0,0 +1,42 @@
+# Passthrough TAKT Piece
+# Thinnest wrapper. Pass task directly to coder as-is.
+#
+# Flow:
+# execute (do the task)
+#   ↓
+# COMPLETE
+
+name: passthrough
+description: Single-agent thin wrapper. Pass task directly to coder as-is.
+
+max_iterations: 10
+
+initial_movement: execute
+
+movements:
+  - name: execute
+    edit: true
+    agent: ../agents/default/coder.md
+    report:
+      - Summary: summary.md
+    allowed_tools:
+      - Read
+      - Glob
+      - Grep
+      - Edit
+      - Write
+      - Bash
+      - WebSearch
+      - WebFetch
+    permission_mode: edit
+    rules:
+      - condition: Task complete
+        next: COMPLETE
+      - condition: Cannot proceed
+        next: ABORT
+      - condition: User input required
+        next: execute
+        requires_user_input: true
+        interactive_only: true
+    instruction_template: |
+      Do the task.
diff --git a/resources/global/ja/piece-categories.yaml b/resources/global/ja/piece-categories.yaml
index a04dc24..91ee58a 100644
--- a/resources/global/ja/piece-categories.yaml
+++ b/resources/global/ja/piece-categories.yaml
@@ -2,6 +2,7 @@ piece_categories:
   "🚀 クイックスタート":
     pieces:
       - default
+      - passthrough
       - coding
       - minimal
 
diff --git a/resources/global/ja/pieces/passthrough.yaml b/resources/global/ja/pieces/passthrough.yaml
new file mode 100644
index 0000000..3f54314
--- /dev/null
+++ b/resources/global/ja/pieces/passthrough.yaml
@@ -0,0 +1,42 @@
+# Passthrough TAKT Piece
+# タスクをそのままエージェントに渡す最薄ラッパー。
+#
+# フロー:
+# execute (タスク実行)
+#   ↓
+# COMPLETE
+
+name: passthrough
+description: Single-agent thin wrapper. Pass task directly to coder as-is.
+
+max_iterations: 10
+
+initial_movement: execute
+
+movements:
+  - name: execute
+    edit: true
+    agent: ../agents/default/coder.md
+    report:
+      - Summary: summary.md
+    allowed_tools:
+      - Read
+      - Glob
+      - Grep
+      - Edit
+      - Write
+      - Bash
+      - WebSearch
+      - WebFetch
+    permission_mode: edit
+    rules:
+      - condition: タスク完了
+        next: COMPLETE
+      - condition: 進行できない
+        next: ABORT
+      - condition: ユーザー入力が必要
+        next: execute
+        requires_user_input: true
+        interactive_only: true
+    instruction_template: |
+      タスクをこなしてください。
diff --git a/src/__tests__/config.test.ts b/src/__tests__/config.test.ts
index fe1567b..a54afea 100644
--- a/src/__tests__/config.test.ts
+++ b/src/__tests__/config.test.ts
@@ -45,7 +45,7 @@ describe('getBuiltinPiece', () => {
   });
 
   it('should return null for non-existent piece names', () => {
-    expect(getBuiltinPiece('passthrough')).toBeNull();
+    expect(getBuiltinPiece('nonexistent-piece')).toBeNull();
     expect(getBuiltinPiece('unknown')).toBeNull();
     expect(getBuiltinPiece('')).toBeNull();
   });