diff --git a/A00_Common/b_page_state.ts b/A00_Common/b_page_state.ts
index 1535f8fc4..810c7b6f5 100644
--- a/A00_Common/b_page_state.ts
+++ b/A00_Common/b_page_state.ts
@@ -599,8 +599,32 @@ export function clearResults(projectId: string | null, routeId?: number | string
  * 값이 빈 객체(`{}`)면 없는 것으로 본다.
  */
 export function hasDrafts(projectId: string | null, routeId?: number | string | null): boolean {
-  return namesInBucket("draft").some((name) => {
-    const raw = readStateRaw(name, projectId, routeId);
-    return raw !== null && raw !== "{}" && raw !== "[]" && raw !== "";
-  });
+  return namesInBucket("draft").some((name) =>
+    draftFilled(readStateRaw(name, projectId, routeId), name, projectId),
+  );
+}
+
+/** 저장분이 비어 있지 않은 목록 칸(관 · 구조물) — 페이지가 저장분을 받을 때 적음(469-3 · 새 요청 없음). */
+const savedLists = new Set<string>();
+export function noteSavedList(projectId: string, name: StateName, nonEmpty: boolean): void {
+  const key = `${name}:${projectId}`;
+  if (nonEmpty) savedLists.add(key);
+  else savedLists.delete(key);
+}
+export function forgetSavedLists(projectId: string): void {
+  for (const key of [...savedLists]) if (key.endsWith(`:${projectId}`)) savedLists.delete(key);
+}
+
+/**
+ * 초안 칸이 고침인가 — 떠남 확인(`design_leave`)과 `hasDrafts` 가 쓰는 한 규칙.
+ * 칸 없음 · "" · "{}" = 빈 칸 · "[]" = 저장분이 비어 있지 않은 목록 칸일 때만 고침(모두 지움 ≠ 저장분).
+ */
+export function draftFilled(
+  raw: string | null,
+  name: StateName,
+  projectId: string | null,
+): boolean {
+  if (raw === null || raw === "" || raw === "{}") return false;
+  if (raw === "[]") return !!projectId && savedLists.has(`${name}:${projectId}`);
+  return true;
 }
diff --git a/A00_Common/design/design_leave.ts b/A00_Common/design/design_leave.ts
index 5d260a924..49126e933 100644
--- a/A00_Common/design/design_leave.ts
+++ b/A00_Common/design/design_leave.ts
@@ -16,6 +16,7 @@ import { t as L } from "@ui/ui_template_locale";
 import { guardProjectLeave } from "../b_project_switch";
 import {
   clearState,
+  draftFilled,
   namesInBucket,
   readByKey,
   routeStateKeys,
@@ -38,9 +39,6 @@ export function editDraftNames(): StateName[] {
   return namesInBucket("draft").filter((name) => !NOT_EDITS.has(name) && !OTHER_PAGE.test(name));
 }
 
-const filled = (raw: string | null): raw is string =>
-  raw !== null && raw !== "" && raw !== "{}" && raw !== "[]";
-
 /** 고침 칸 지문 — 모든 노선 것 · 빈 칸 뺌 · 고침이 없으면 "". */
 export function editSignature(projectId: string): string {
   const parts: string[] = [];
@@ -49,7 +47,7 @@ export function editSignature(projectId: string): string {
     const keys = own ? [own] : routeStateKeys(name, projectId);
     for (const key of keys.sort()) {
       const raw = readByKey(key);
-      if (filled(raw)) parts.push(`${key}=${raw}`);
+      if (raw !== null && draftFilled(raw, name, projectId)) parts.push(`${key}=${raw}`);
     }
   }
   return parts.join("\n");
diff --git a/A00_Common/design/design_page_data.ts b/A00_Common/design/design_page_data.ts
index 70ba17f67..9eb0a3c3a 100644
--- a/A00_Common/design/design_page_data.ts
+++ b/A00_Common/design/design_page_data.ts
@@ -15,6 +15,7 @@
 
 import { fetchDetailPipePoints } from "../../B04_PreProcess/B04_PreProcess_Api_Fetch";
 import type { SectionContextResponse } from "../../B06_Section/B06_Section_Api_Fetch";
+import { forgetSavedLists, noteSavedList } from "../b_page_state";
 import { setPageRouteId } from "./design_page_route";
 export { pageRouteId } from "./design_page_route";
 import {
@@ -36,11 +37,17 @@ function once<T>(key: string, load: () => Promise<T>): Promise<T> {
 
 /** 저장 구조물(structures.json · 판번호 · 정의 판). */
 export const pageStructures = (projectId: string): ReturnType<typeof fetchStructures> =>
-  once(`structures:${projectId}`, () => fetchStructures(projectId));
+  once(`structures:${projectId}`, () => fetchStructures(projectId)).then((saved) => {
+    noteSavedList(projectId, "structures", !!saved?.structures?.length); // 떠남 확인의 「[]」 판정(469-3)
+    return saved;
+  });
 
 /** 저장 관(pipe_points.json · 유역). */
 export const pagePipes = (projectId: string): ReturnType<typeof fetchDetailPipePoints> =>
-  once(`pipes:${projectId}`, () => fetchDetailPipePoints(projectId));
+  once(`pipes:${projectId}`, () => fetchDetailPipePoints(projectId)).then((saved) => {
+    noteSavedList(projectId, "pipes", !!saved?.pipe_points?.length);
+    return saved;
+  });
 
 /** 정의 판이 바뀌었으면 종류 캐시 버림 — 페이지마다 한 번(탭이 다시 보일 때는 `onStaleStructureTypes`). */
 export const pageTypesChecked = (projectId: string): Promise<boolean> =>
@@ -49,6 +56,7 @@ export const pageTypesChecked = (projectId: string): Promise<boolean> =>
 /** 저장 정본이 바뀜 · 페이지를 떠남(`leaving` = 노선 id 칸도) — 다음에 부르면 한 번 다시 받음. */
 export function forgetPageData(projectId: string, leaving = false): void {
   for (const key of [...memo.keys()]) if (key.endsWith(`:${projectId}`)) memo.delete(key);
+  forgetSavedLists(projectId);
   if (leaving) setPageRouteId(projectId, null);
 }
 
diff --git a/resources/tester/helper_273_2_preview_stations.cjs b/resources/tester/helper_273_2_preview_stations.cjs
index 8dbe4da29..6a9cf673d 100644
--- a/resources/tester/helper_273_2_preview_stations.cjs
+++ b/resources/tester/helper_273_2_preview_stations.cjs
@@ -56,6 +56,7 @@ const drafts = loadTs("B06_Section/B06_Section_Section_Drafts.ts", {
       fetchSectionContext: async () => ({ route_id: 1 }),
     },
     "./design_page_route": loadTs("A00_Common/design/design_page_route.ts"), // 노선 id 한 칸(386-2b)
+    "../b_page_state": { noteSavedList: () => undefined, forgetSavedLists: () => undefined },
   }),
   "../B05_Profile/B05_Profile_Api_Pipes_Draft": { readPendingPipes: () => draftPipes },
   "../B05_Profile/B05_Profile_Api_PlusStations": { readPlusDraft: () => null },
diff --git a/resources/tester/helper_384_2_page_data.cjs b/resources/tester/helper_384_2_page_data.cjs
index ac83ae4dc..f60c8869d 100644
--- a/resources/tester/helper_384_2_page_data.cjs
+++ b/resources/tester/helper_384_2_page_data.cjs
@@ -15,6 +15,7 @@ const routeBox = { exports: {} };
 new Function("exports", "module", "require", routeJs)(routeBox.exports, routeBox, () => ({}));
 const STUBS = {
   "./design_page_route": routeBox.exports, // 노선 id 한 칸(386-2b · 진짜)
+  "../b_page_state": { noteSavedList: () => undefined, forgetSavedLists: () => undefined },
   "../../B04_PreProcess/B04_PreProcess_Api_Fetch": {
     fetchDetailPipePoints: async () => {
       calls.pipes += 1;
diff --git a/resources/tester/helper_469_3_list_draft.cjs b/resources/tester/helper_469_3_list_draft.cjs
new file mode 100644
index 000000000..0936dc72f
--- /dev/null
+++ b/resources/tester/helper_469_3_list_draft.cjs
@@ -0,0 +1,69 @@
+/* 469-3 빈 목록 초안("[]") 떠남 판정 헬퍼 — `design_leave` · `b_page_state` 를 한 번씩만 읽어(같은 모듈 한 벌)
+ * 저장분 있음/없음에 따라 designDirty · hasDrafts 가 같게 나오는지. 결과 JSON 을 stdout 으로.
+ */
+const path = require("path");
+const { makeLoader } = require("./helper_ts_stub_loader.cjs");
+
+const ROOT = path.join(__dirname, "..", "..");
+
+const map = new Map();
+const session = {
+  getItem: (key) => (map.has(key) ? map.get(key) : null),
+  setItem: (key, value) => map.set(key, String(value)),
+  removeItem: (key) => map.delete(key),
+  key: (index) => [...map.keys()][index] ?? null,
+  get length() {
+    return map.size;
+  },
+};
+globalThis.window = { sessionStorage: session, localStorage: session };
+globalThis.sessionStorage = session;
+
+const STUBS = {
+  "@config/config_frontend": {
+    ROUTES: { B05_PROFILE: "/b05-profile", B06_SECTION: "/b06-section" },
+  },
+  "@ui/ui_template_locale": { t: (key) => key },
+  "../b_project_switch": { guardProjectLeave: () => undefined },
+};
+const { loadTs } = makeLoader({
+  root: ROOT,
+  requireFor: (full, file) => (request) => {
+    if (request in STUBS) return STUBS[request];
+    if (request.startsWith(".")) return loadTs(path.join(path.dirname(file), `${request}.ts`));
+    return require(request);
+  },
+});
+const state = loadTs(path.join(ROOT, "A00_Common", "b_page_state.ts"));
+const leave = loadTs(path.join(ROOT, "A00_Common", "design", "design_leave.ts"));
+const P = "p1";
+const set = (name, raw) => session.setItem(`aislo:draft:${name}:${P}`, raw);
+const unset = (name) => session.removeItem(`aislo:draft:${name}:${P}`);
+const both = () => [leave.designDirty(P), state.hasDrafts(P)];
+
+const out = {};
+set("pipes", "[]");
+out.unknownSaved = both(); // 저장분을 모름 = 빈 칸(전과 같음)
+state.noteSavedList(P, "pipes", false);
+out.savedEmpty = both(); // 처음부터 관 0
+state.noteSavedList(P, "pipes", true);
+out.savedFilled = both(); // 관 있던 곳에서 모두 지움
+unset("pipes");
+set("structures", "[]");
+out.structuresSavedEmpty = both();
+state.noteSavedList(P, "structures", true);
+out.structuresSavedFilled = both();
+leave.discardDesignEdits(P);
+out.afterDiscard = [both(), session.getItem(`aislo:draft:structures:${P}`)];
+set("pipes", "[]");
+state.forgetSavedLists(P);
+out.afterForget = both();
+for (const raw of ["{}", ""]) {
+  set("pipes", raw);
+  state.noteSavedList(P, "pipes", true);
+  out[`raw_${raw || "empty"}`] = both();
+}
+state.noteSavedList(P, "pipes", true);
+set("pipes", '[{"id":1}]');
+out.withItems = both();
+process.stdout.write(JSON.stringify(out));
diff --git a/resources/tester/test_469_3_list_draft_leave.py b/resources/tester/test_469_3_list_draft_leave.py
new file mode 100644
index 000000000..a5e380718
--- /dev/null
+++ b/resources/tester/test_469_3_list_draft_leave.py
@@ -0,0 +1,44 @@
+"""469-3 빈 목록 초안("[]") 떠남 판정 — 저장분이 있으면 고침 · 없으면 빈 칸 · 떠남 확인과 hasDrafts 한 규칙.
+
+./venv/Scripts/python.exe -m pytest resources/tester/test_469_3_list_draft_leave.py -q
+"""
+
+from __future__ import annotations
+
+import json
+import subprocess
+from pathlib import Path
+
+import pytest
+
+HELPER = Path(__file__).resolve().parent / "helper_469_3_list_draft.cjs"
+
+
+@pytest.fixture(scope="module")
+def out() -> dict:
+    run = subprocess.run(  # noqa: S603 — 고정 실행 파일
+        ["node", str(HELPER)], capture_output=True, text=True, encoding="utf-8"
+    )
+    assert run.returncode == 0, run.stderr
+    return json.loads(run.stdout)
+
+
+def test_저장분이_비었거나_모르면_빈_칸(out) -> None:
+    assert out["unknownSaved"] == [False, False]
+    assert out["savedEmpty"] == [False, False]
+    assert out["structuresSavedEmpty"] == [False, False]
+    assert out["afterForget"] == [False, False]
+
+
+def test_저장분이_있는데_모두_지웠으면_고침(out) -> None:
+    assert out["savedFilled"] == [True, True]
+    assert out["structuresSavedFilled"] == [True, True]
+
+
+def test_폐기는_빈_목록_칸도_지움(out) -> None:
+    assert out["afterDiscard"] == [[False, False], None]
+
+
+def test_빈_객체_빈_글은_그대로_빈_칸_항목이_있으면_고침(out) -> None:
+    assert out["raw_{}"] == [False, False] and out["raw_empty"] == [False, False]
+    assert out["withItems"] == [True, True]