diff --git a/cocoscreator_projects/YouleNexus/assets/framework/platform/stores/platform-store.ts b/cocoscreator_projects/YouleNexus/assets/framework/platform/stores/platform-store.ts
index ac2f09f..9f8e3dd 100644
--- a/cocoscreator_projects/YouleNexus/assets/framework/platform/stores/platform-store.ts
+++ b/cocoscreator_projects/YouleNexus/assets/framework/platform/stores/platform-store.ts
@@ -1,4 +1,4 @@
-import { signal, type Reactive, type Unsubscribe } from '../../core/reactive.ts';
+import type { Unsubscribe } from '../../core/reactive.ts';
 import {
   hasOwn,
   requireArray,
@@ -74,10 +74,70 @@ function roomtypePropertyPath(path: string, key: string, isArray: boolean): stri
   return `${path}[${JSON.stringify(key)}]`;
 }
 
+interface RoomtypePropertySnapshot {
+  readonly key: PropertyKey;
+  readonly path: string;
+  readonly descriptor: PropertyDescriptor;
+}
+
+interface RoomtypeObjectSnapshot {
+  readonly source: object;
+  readonly path: string;
+  readonly isArray: boolean;
+  readonly prototype: object | null;
+  readonly keys: readonly PropertyKey[];
+  readonly properties: readonly RoomtypePropertySnapshot[];
+}
+
+function samePropertyDescriptor(
+  first: PropertyDescriptor,
+  second: PropertyDescriptor,
+): boolean {
+  const firstIsData = 'value' in first;
+  const secondIsData = 'value' in second;
+  if (firstIsData !== secondIsData) return false;
+  if (
+    first.enumerable !== second.enumerable
+    || first.configurable !== second.configurable
+  ) return false;
+  if (firstIsData && secondIsData) {
+    return first.writable === second.writable && Object.is(first.value, second.value);
+  }
+  return Object.is(first.get, second.get) && Object.is(first.set, second.set);
+}
+
+function verifyRoomtypeSourceGraph(graph: readonly RoomtypeObjectSnapshot[]): void {
+  for (const snapshot of graph) {
+    if (Array.isArray(snapshot.source) !== snapshot.isArray) {
+      throw new TypeError(`${snapshot.path}: unstable roomtype container kind`);
+    }
+    if (!Object.is(Object.getPrototypeOf(snapshot.source), snapshot.prototype)) {
+      throw new TypeError(`${snapshot.path}: unstable roomtype prototype`);
+    }
+    const keys = Reflect.ownKeys(snapshot.source);
+    if (
+      keys.length !== snapshot.keys.length
+      || keys.some((key, index) => !Object.is(key, snapshot.keys[index]))
+    ) {
+      throw new TypeError(`${snapshot.path}: unstable roomtype own keys`);
+    }
+    for (const property of snapshot.properties) {
+      const descriptor = Reflect.getOwnPropertyDescriptor(snapshot.source, property.key);
+      if (
+        descriptor === undefined
+        || !samePropertyDescriptor(property.descriptor, descriptor)
+      ) {
+        throw new TypeError(`${property.path}: unstable roomtype property descriptor`);
+      }
+    }
+  }
+}
+
 function cloneAndFreezeRoomtype(value: readonly unknown[]): readonly unknown[] {
   const copies = new WeakMap<object, object>();
   const active = new WeakSet<object>();
   const ownedGraph: object[] = [];
+  const sourceGraph: RoomtypeObjectSnapshot[] = [];
 
   const copy = (current: unknown, path: string): unknown => {
     if (current === null) return null;
@@ -103,40 +163,47 @@ function cloneAndFreezeRoomtype(value: readonly unknown[]): readonly unknown[] {
       throw new TypeError(`${path}: expected JSON array or plain object container`);
     }
 
+    const keys = Reflect.ownKeys(current);
+    const properties: RoomtypePropertySnapshot[] = [];
+    for (const key of keys) {
+      if (typeof key !== 'string') {
+        throw new TypeError(`${path}: symbol properties are not valid roomtype data`);
+      }
+      const propertyPath = roomtypePropertyPath(path, key, sourceIsArray);
+      const descriptor = Reflect.getOwnPropertyDescriptor(current, key);
+      if (descriptor === undefined) {
+        throw new TypeError(`${propertyPath}: unstable property structure`);
+      }
+      properties.push({ key, path: propertyPath, descriptor });
+    }
+
+    const lengthProperty = properties.find((property) => property.key === 'length');
     let target: unknown[] | Record<string, unknown>;
     let arrayLength = 0;
     if (sourceIsArray) {
-      const lengthDescriptor = Reflect.getOwnPropertyDescriptor(current, 'length');
-      if (lengthDescriptor === undefined || !('value' in lengthDescriptor)) {
+      if (lengthProperty === undefined || !('value' in lengthProperty.descriptor)) {
         throw new TypeError(`${path}.length: expected stable data property`);
       }
-      arrayLength = requireInteger(lengthDescriptor.value, `${path}.length`);
+      arrayLength = requireInteger(lengthProperty.descriptor.value, `${path}.length`);
       if (arrayLength < 0) throw new RangeError(`${path}.length: expected non-negative integer`);
       target = new Array(arrayLength);
     } else {
       target = prototype === null ? Object.create(null) as Record<string, unknown> : {};
     }
 
+    sourceGraph.push({ source: current, path, isArray: sourceIsArray, prototype, keys, properties });
     copies.set(current, target);
     active.add(current);
     ownedGraph.push(target);
-    const keys = Reflect.ownKeys(current);
-    for (const key of keys) {
+    for (const property of properties) {
+      const { key, path: propertyPath, descriptor } = property;
       if (sourceIsArray && key === 'length') continue;
-      if (typeof key !== 'string') {
-        throw new TypeError(`${path}: symbol properties are not valid roomtype data`);
-      }
-      const propertyPath = roomtypePropertyPath(path, key, sourceIsArray);
       if (sourceIsArray) {
         const index = Number(key);
         if (!Number.isInteger(index) || index < 0 || index >= arrayLength || String(index) !== key) {
           throw new TypeError(`${propertyPath}: expected array index`);
         }
       }
-      const descriptor = Reflect.getOwnPropertyDescriptor(current, key);
-      if (descriptor === undefined) {
-        throw new TypeError(`${propertyPath}: unstable property structure`);
-      }
       if (!('value' in descriptor)) {
         throw new TypeError(`${propertyPath}: accessor properties are not allowed in roomtype`);
       }
@@ -156,6 +223,7 @@ function cloneAndFreezeRoomtype(value: readonly unknown[]): readonly unknown[] {
   };
 
   const canonical = copy(value, 'roomtype') as readonly unknown[];
+  verifyRoomtypeSourceGraph(sourceGraph);
   for (let index = ownedGraph.length - 1; index >= 0; index -= 1) {
     Object.freeze(ownedGraph[index]);
   }
@@ -323,15 +391,54 @@ const INITIAL_STATE: PlatformState = Object.freeze({
 
 export type PlatformStateListener = (state: PlatformState, previous: PlatformState) => void;
 
+interface PlatformTransition {
+  readonly state: PlatformState;
+  readonly previous: PlatformState;
+  readonly listeners: readonly PlatformStateListener[];
+}
+
 export class PlatformStore {
-  private readonly stateCell: Reactive<PlatformState> = signal(INITIAL_STATE);
+  private state: PlatformState = INITIAL_STATE;
+  private readonly listeners = new Set<PlatformStateListener>();
+  private readonly transitions: PlatformTransition[] = [];
+  private publishing = false;
 
   getState(): PlatformState {
-    return this.stateCell.value;
+    return this.state;
   }
 
   subscribe(listener: PlatformStateListener): Unsubscribe {
-    return this.stateCell.subscribe(listener);
+    this.listeners.add(listener);
+    return (): void => { this.listeners.delete(listener); };
+  }
+
+  private commit(state: PlatformState): void {
+    if (Object.is(state, this.state)) return;
+    const previous = this.state;
+    this.state = state;
+    this.transitions.push({
+      state,
+      previous,
+      listeners: [...this.listeners],
+    });
+    if (this.publishing) return;
+
+    this.publishing = true;
+    try {
+      while (this.transitions.length > 0) {
+        const transition = this.transitions.shift();
+        if (transition === undefined) continue;
+        for (const listener of transition.listeners) {
+          try {
+            listener(transition.state, transition.previous);
+          } catch (error) {
+            console.error('[reactive] subscriber error:', error);
+          }
+        }
+      }
+    } finally {
+      this.publishing = false;
+    }
   }
 
   applyLoginSuccess(parsed: ParsedLoginResponse): void {
@@ -374,11 +481,11 @@ export class PlatformStore {
           player,
           requireProtocolFlag(raw.isbattle, '$.login.raw.isbattle'),
         );
-    this.stateCell.value = Object.freeze({
+    this.commit(Object.freeze({
       app: Object.freeze({ phase: 'logged-in' }),
       players: roomResult.players,
       room: roomResult.room,
-    });
+    }));
   }
 
   replaceRoom(parsed: ParsedRoomResponse): void {
@@ -423,11 +530,11 @@ export class PlatformStore {
       ? 1
       : requireProtocolFlag(raw.deskwar, '$.response.raw.deskwar');
     const roomResult = buildRoom(input.room, raw, selfPlayer, stage);
-    this.stateCell.value = Object.freeze({
+    this.commit(Object.freeze({
       app: previous.app,
       players: roomResult.players,
       room: roomResult.room,
-    });
+    }));
   }
 
   clearRoom(): void {
@@ -441,14 +548,14 @@ export class PlatformStore {
     if (selfPlayer === undefined) {
       throw new Error('players.entities: missing authenticated player');
     }
-    this.stateCell.value = Object.freeze({
+    this.commit(Object.freeze({
       app: previous.app,
       players: Object.freeze({
         selfPlayerId,
         entities: Object.freeze({ [selfPlayerId]: selfPlayer }),
       }),
       room: Object.freeze({ kind: 'outside' }),
-    });
+    }));
   }
 
   playerJoin(parsed: ParsedSeatPayload): void {
@@ -480,7 +587,7 @@ export class PlatformStore {
       ? [...room.offlineSeats, event.seat]
       : [...room.offlineSeats];
 
-    this.stateCell.value = Object.freeze({
+    this.commit(Object.freeze({
       app: previous.app,
       players: Object.freeze({
         selfPlayerId: previous.players.selfPlayerId,
@@ -492,7 +599,7 @@ export class PlatformStore {
         readySeats: Object.freeze(readySeats),
         offlineSeats: Object.freeze(offlineSeats),
       }),
-    });
+    }));
   }
 
   playerReady(parsed: ParsedSeatPayload): void {
@@ -512,14 +619,14 @@ export class PlatformStore {
       [playerid]: Object.freeze({ ...player, isprepare: 1 }),
     });
     const readySeats = Object.freeze([...room.readySeats, event.seat]);
-    this.stateCell.value = Object.freeze({
+    this.commit(Object.freeze({
       app: previous.app,
       players: Object.freeze({
         selfPlayerId: previous.players.selfPlayerId,
         entities,
       }),
       room: Object.freeze({ ...room, readySeats }),
-    });
+    }));
   }
 
   playerOffline(parsed: ParsedSeatPayload): void {
@@ -539,14 +646,14 @@ export class PlatformStore {
       [playerid]: Object.freeze({ ...player, onstate: 1 }),
     });
     const offlineSeats = Object.freeze([...room.offlineSeats, event.seat]);
-    this.stateCell.value = Object.freeze({
+    this.commit(Object.freeze({
       app: previous.app,
       players: Object.freeze({
         selfPlayerId: previous.players.selfPlayerId,
         entities,
       }),
       room: Object.freeze({ ...room, offlineSeats }),
-    });
+    }));
   }
 
   playerOnline(parsed: ParsedOnlinePayload): void {
@@ -573,14 +680,14 @@ export class PlatformStore {
     const offlineSeats = Object.freeze(
       room.offlineSeats.filter((seat) => seat !== event.seat),
     );
-    this.stateCell.value = Object.freeze({
+    this.commit(Object.freeze({
       app: previous.app,
       players: Object.freeze({
         selfPlayerId: previous.players.selfPlayerId,
         entities,
       }),
       room: Object.freeze({ ...room, offlineSeats }),
-    });
+    }));
   }
 
   playerExit(parsed: ParsedSeatPayload): void {
@@ -601,7 +708,7 @@ export class PlatformStore {
     const readySeats = room.readySeats.filter((seat) => seat !== event.seat);
     const offlineSeats = room.offlineSeats.filter((seat) => seat !== event.seat);
 
-    this.stateCell.value = Object.freeze({
+    this.commit(Object.freeze({
       app: previous.app,
       players: Object.freeze({
         selfPlayerId: previous.players.selfPlayerId,
@@ -613,6 +720,6 @@ export class PlatformStore {
         readySeats: Object.freeze(readySeats),
         offlineSeats: Object.freeze(offlineSeats),
       }),
-    });
+    }));
   }
 }
diff --git a/cocoscreator_projects/framework-tests/platform/platform-store.test.ts b/cocoscreator_projects/framework-tests/platform/platform-store.test.ts
index aefb1da..81ff8bc 100644
--- a/cocoscreator_projects/framework-tests/platform/platform-store.test.ts
+++ b/cocoscreator_projects/framework-tests/platform/platform-store.test.ts
@@ -2,6 +2,7 @@ import { readFileSync } from 'node:fs';
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { PlatformStore } from '../../YouleNexus/assets/framework/platform/stores/platform-store.ts';
+import type { PlatformState } from '../../YouleNexus/assets/framework/platform/stores/platform-types.ts';
 import {
   parseLoginResponse,
   parseOtherExitRoomPayload,
@@ -572,3 +573,245 @@ test('cyclic roomtype input is rejected atomically without mutating caller data'
   assert.equal(store.getState(), before);
   assert.equal(notifications, 0);
 });
+
+test('roomtype descriptor changes between copy and verification fail atomically', () => {
+  const sibling = { stable: true };
+  const target = { value: 0 };
+  let descriptorReads = 0;
+  const unstable = new Proxy(target, {
+    getOwnPropertyDescriptor(object, key): PropertyDescriptor | undefined {
+      const descriptor = Reflect.getOwnPropertyDescriptor(object, key);
+      if (key !== 'value' || descriptor === undefined) return descriptor;
+      descriptorReads += 1;
+      return { ...descriptor, value: descriptorReads };
+    },
+  });
+  const roomtype = [sibling, unstable];
+  const data = fixture('self-join-room.json').data;
+  data.roomtype = roomtype;
+  const parsed = parseSelfJoinRoomResponse(data);
+  const store = new PlatformStore();
+  store.applyLoginSuccess(parseLoginResponse(fixture('player-login-success.json').data));
+  const before = store.getState();
+  let notifications = 0;
+  store.subscribe(() => { notifications += 1; });
+
+  assert.throws(() => store.replaceRoom(parsed), /roomtype\[1\]\.value.*unstable/i);
+  assert.equal(descriptorReads >= 2, true);
+  assert.equal(target.value, 0);
+  assert.equal(Object.isFrozen(roomtype), false);
+  assert.equal(Object.isFrozen(sibling), false);
+  assert.equal(Object.isFrozen(target), false);
+  assert.equal(store.getState(), before);
+  assert.equal(notifications, 0);
+});
+
+test('roomtype own-key changes between copy and verification fail atomically', () => {
+  const target = { first: 1, second: 2 };
+  let ownKeyReads = 0;
+  const unstable = new Proxy(target, {
+    ownKeys(): ArrayLike<string | symbol> {
+      ownKeyReads += 1;
+      return ownKeyReads === 1 ? ['first'] : ['second'];
+    },
+  });
+  const roomtype = [unstable];
+  const data = fixture('self-join-room.json').data;
+  data.roomtype = roomtype;
+  const parsed = parseSelfJoinRoomResponse(data);
+  const store = new PlatformStore();
+  store.applyLoginSuccess(parseLoginResponse(fixture('player-login-success.json').data));
+  const before = store.getState();
+  let notifications = 0;
+  store.subscribe(() => { notifications += 1; });
+
+  assert.throws(() => store.replaceRoom(parsed), /roomtype\[0\].*unstable.*own keys/i);
+  assert.equal(ownKeyReads >= 2, true);
+  assert.deepEqual(target, { first: 1, second: 2 });
+  assert.equal(Object.isFrozen(roomtype), false);
+  assert.equal(Object.isFrozen(target), false);
+  assert.equal(store.getState(), before);
+  assert.equal(notifications, 0);
+});
+
+test('canonical roomtype preserves sparse length, holes, and negative zero', () => {
+  const sparse = new Array<unknown>(5);
+  sparse[1] = -0;
+  sparse[4] = { tail: true };
+  const data = fixture('player-login-room.json').data;
+  data.roomtype = sparse;
+  const store = new PlatformStore();
+  store.applyLoginSuccess(parseLoginResponse(data));
+  const state = store.getState();
+
+  assert.equal(state.room.kind, 'inside');
+  if (state.room.kind !== 'inside') return;
+  assert.equal(state.room.roomtype.length, 5);
+  assert.equal(0 in state.room.roomtype, false);
+  assert.equal(1 in state.room.roomtype, true);
+  assert.equal(Object.is(state.room.roomtype[1], -0), true);
+  assert.equal(2 in state.room.roomtype, false);
+  assert.equal(3 in state.room.roomtype, false);
+  assert.deepEqual(state.room.roomtype[4], { tail: true });
+  assert.equal(Object.isFrozen(state.room.roomtype[4]), true);
+  assert.equal(Object.isFrozen(sparse), false);
+  assert.equal(Object.isFrozen(sparse[4]), false);
+});
+
+test('canonical roomtype keeps own __proto__ data without prototype pollution', () => {
+  const source = {} as Record<string, unknown>;
+  Object.defineProperty(source, '__proto__', {
+    configurable: true,
+    enumerable: true,
+    writable: true,
+    value: { polluted: true },
+  });
+  const data = fixture('player-login-room.json').data;
+  data.roomtype = [source];
+  const store = new PlatformStore();
+  store.applyLoginSuccess(parseLoginResponse(data));
+  const state = store.getState();
+
+  assert.equal(state.room.kind, 'inside');
+  if (state.room.kind !== 'inside') return;
+  const canonical = state.room.roomtype[0] as Record<string, unknown>;
+  assert.equal(Object.getPrototypeOf(canonical), Object.prototype);
+  assert.equal(Object.prototype.hasOwnProperty.call(canonical, '__proto__'), true);
+  assert.deepEqual(canonical.__proto__, { polluted: true });
+  assert.equal(({} as { polluted?: boolean }).polluted, undefined);
+  assert.equal(Object.isFrozen(canonical.__proto__), true);
+});
+
+test('non-JSON roomtype own data is rejected without state or caller mutation', () => {
+  const cases: ReadonlyArray<readonly [string, () => unknown[]]> = [
+    ['symbol', () => {
+      const source = { value: 1 } as Record<PropertyKey, unknown>;
+      source[Symbol('hidden')] = 2;
+      return [source];
+    }],
+    ['enumerable', () => {
+      const source = { value: 1 };
+      Object.defineProperty(source, 'hidden', { enumerable: false, value: 2 });
+      return [source];
+    }],
+    ['finite', () => [Number.NaN]],
+  ];
+
+  for (const [error, makeRoomtype] of cases) {
+    const roomtype = makeRoomtype();
+    const data = fixture('player-login-room.json').data;
+    data.roomtype = roomtype;
+    const parsed = parseLoginResponse(data);
+    const store = new PlatformStore();
+    const before = store.getState();
+    let notifications = 0;
+    store.subscribe(() => { notifications += 1; });
+
+    assert.throws(() => store.applyLoginSuccess(parsed), new RegExp(error, 'i'));
+    assert.equal(Object.isFrozen(roomtype), false);
+    if (typeof roomtype[0] === 'object' && roomtype[0] !== null) {
+      assert.equal(Object.isFrozen(roomtype[0]), false);
+    }
+    assert.equal(store.getState(), before);
+    assert.equal(notifications, 0);
+  }
+});
+
+test('reentrant store commits publish each stable transition before the next', () => {
+  const store = new PlatformStore();
+  const events: string[] = [];
+  let nested = false;
+  const describe = (label: string, next: PlatformState, previous: PlatformState): void => {
+    events.push(`${label}:${next.room.kind}<-${previous.room.kind}`);
+  };
+  store.subscribe((next, previous) => {
+    describe('A', next, previous);
+    if (!nested && next.room.kind === 'inside' && previous.room.kind === 'outside') {
+      nested = true;
+      store.clearRoom();
+    }
+  });
+  store.subscribe((next, previous) => { describe('B', next, previous); });
+
+  store.applyLoginSuccess(parseLoginResponse(fixture('player-login-room.json').data));
+
+  assert.deepEqual(events, [
+    'A:inside<-outside',
+    'B:inside<-outside',
+    'A:outside<-inside',
+    'B:outside<-inside',
+  ]);
+  assert.equal(store.getState().room.kind, 'outside');
+});
+
+test('multiple reentrant commits retain their real previous and next states', () => {
+  const store = new PlatformStore();
+  const events: string[] = [];
+  let nested = false;
+  store.subscribe((next, previous) => {
+    events.push(`A:${next.room.kind}<-${previous.room.kind}`);
+    if (!nested && next.room.kind === 'inside' && previous.room.kind === 'outside') {
+      nested = true;
+      store.clearRoom();
+      assert.equal(store.getState().room.kind, 'outside');
+      store.applyLoginSuccess(parseLoginResponse(fixture('player-login-room.json').data));
+      assert.equal(store.getState().room.kind, 'inside');
+    }
+  });
+  store.subscribe((next, previous) => {
+    events.push(`B:${next.room.kind}<-${previous.room.kind}`);
+  });
+
+  store.applyLoginSuccess(parseLoginResponse(fixture('player-login-room.json').data));
+
+  assert.deepEqual(events, [
+    'A:inside<-outside', 'B:inside<-outside',
+    'A:outside<-inside', 'B:outside<-inside',
+    'A:inside<-outside', 'B:inside<-outside',
+  ]);
+});
+
+test('subscription changes during publish apply only to later transition snapshots', () => {
+  const store = new PlatformStore();
+  const events: string[] = [];
+  let nested = false;
+  let unsubscribeB = (): void => undefined;
+  store.subscribe((next, previous) => {
+    events.push(`A:${next.room.kind}<-${previous.room.kind}`);
+    if (!nested && next.room.kind === 'inside') {
+      nested = true;
+      unsubscribeB();
+      store.subscribe((laterNext, laterPrevious) => {
+        events.push(`C:${laterNext.room.kind}<-${laterPrevious.room.kind}`);
+      });
+      store.clearRoom();
+    }
+  });
+  unsubscribeB = store.subscribe((next, previous) => {
+    events.push(`B:${next.room.kind}<-${previous.room.kind}`);
+  });
+
+  store.applyLoginSuccess(parseLoginResponse(fixture('player-login-room.json').data));
+
+  assert.deepEqual(events, [
+    'A:inside<-outside',
+    'B:inside<-outside',
+    'A:outside<-inside',
+    'C:outside<-inside',
+  ]);
+});
+
+test('subscriber exceptions remain isolated from later store listeners', () => {
+  const store = new PlatformStore();
+  let reached = false;
+  const originalConsoleError = console.error;
+  console.error = (): void => undefined;
+  try {
+    store.subscribe(() => { throw new Error('subscriber boom'); });
+    store.subscribe(() => { reached = true; });
+    store.applyLoginSuccess(parseLoginResponse(fixture('player-login-success.json').data));
+  } finally {
+    console.error = originalConsoleError;
+  }
+  assert.equal(reached, true);
+});