diff --git a/M01_MasterData/M01_MasterData_UI_Logic_Api.ts b/M01_MasterData/M01_MasterData_UI_Logic_Api.ts
index fb180409..8d4d8356 100644
--- a/M01_MasterData/M01_MasterData_UI_Logic_Api.ts
+++ b/M01_MasterData/M01_MasterData_UI_Logic_Api.ts
@@ -186,3 +186,9 @@ export const runCalc = (body: {
 export const saveFiles = (
   files: SaveFile[],
 ): Promise<{ files: { file: string; version: string }[] }> => request("/save", { files });
+
+/** 본떠 만들기 — 정본·자체 둘 다 본뜸 · 새 키(`GX…`)는 서버가 줌(계약 5장) */
+export const copyLogic = (
+  key: string,
+): Promise<{ file: string; version: string; key: string; logic: LogicRow }> =>
+  request("/logic/copy", { key });
diff --git a/M01_MasterData/M01_MasterData_UI_Logic_Flow.ts b/M01_MasterData/M01_MasterData_UI_Logic_Flow.ts
index 80df10cc..8f31326e 100644
--- a/M01_MasterData/M01_MasterData_UI_Logic_Flow.ts
+++ b/M01_MasterData/M01_MasterData_UI_Logic_Flow.ts
@@ -32,7 +32,10 @@ import "./M01_MasterData_UI_Logic_Flow_Style.css";
 
 const title = (kind: FlowKind): string => tx(`Col_${kind}` as TextKey);
 
-/** 자체 로직인지 — 자체 파일이거나 키가 `GX…` · 아직 저장 안 한 새 줄(키 "")도 고칠 수 있음 */
+/**
+ * 자체 로직인지 — 자체 파일(`로직_자체.json`)이거나 키가 `GX…`(계약 5장).
+ * 아직 저장 안 한 새 줄(키 "")도 고칠 수 있음 · 정본은 「본떠 만들기」 뒤에야 고침.
+ */
 export const isOwnLogic = (file: string, row: LogicRow): boolean =>
   file.startsWith("로직_자체") || (row.키 ?? "").startsWith("GX") || (row.키 ?? "") === "";
 
diff --git a/M01_MasterData/M01_MasterData_UI_Logic_Page.ts b/M01_MasterData/M01_MasterData_UI_Logic_Page.ts
index b3ca491d..01b7d9b9 100644
--- a/M01_MasterData/M01_MasterData_UI_Logic_Page.ts
+++ b/M01_MasterData/M01_MasterData_UI_Logic_Page.ts
@@ -18,6 +18,7 @@ import {
 } from "@ui/ui_template_elements";
 import {
   ApiError,
+  copyLogic,
   fetchLogic,
   fetchLogicFiles,
   fetchLogics,
@@ -195,6 +196,7 @@ export async function mountM01Logic(
         row: shown,
         editable: isOwnLogic(current.file, shown),
         onChange: touch,
+        onCopy: () => void onCopy(current),
       });
       return;
     }
@@ -320,6 +322,22 @@ export async function mountM01Logic(
     show(next);
   };
 
+  /** 「본떠 만들기」 — 정본을 자체 파일로 복제하고(계약 5장) 그 새 로직을 바로 엶 */
+  const onCopy = async (from: Opened): Promise<void> => {
+    if (!from.origKey) return;
+    showLoadingOverlay();
+    try {
+      const made = await copyLogic(from.origKey);
+      await reload();
+      showToast(tx("Edit_Copied", { v: made.key }), "success");
+      await open(logicId("자체", made.key), "자체", made.key);
+    } catch (error) {
+      failed(error);
+    } finally {
+      hideLoadingOverlay();
+    }
+  };
+
   const onDelete = async (): Promise<void> => {
     if (!opened?.row) return;
     if (
diff --git a/M01_MasterData/M01_MasterData_UI_Logic_Text.ts b/M01_MasterData/M01_MasterData_UI_Logic_Text.ts
index 615687bd..a727482f 100644
--- a/M01_MasterData/M01_MasterData_UI_Logic_Text.ts
+++ b/M01_MasterData/M01_MasterData_UI_Logic_Text.ts
@@ -134,6 +134,7 @@ const TEXT = {
     "Master logics are read-only here — use “Copy as mine” first",
   ],
   Edit_Copy: ["본떠 만들기", "Copy as mine"],
+  Edit_Copied: ["내 로직 「{v}」 을 만들었음 — 여기서 고치면 됨", "Made your logic “{v}”"],
   Edit_CopySoon: [
     "복제 길(API)이 아직 없음 — 서버가 준비되면 여기서 바로 됨",
     "The copy API is not ready yet",