diff --git a/cocoscreator_projects/YouleNexus/assets/framework/platform/startup.ts b/cocoscreator_projects/YouleNexus/assets/framework/platform/startup.ts
new file mode 100644
index 0000000..66519a3
--- /dev/null
+++ b/cocoscreator_projects/YouleNexus/assets/framework/platform/startup.ts
@@ -0,0 +1,87 @@
+import type { EventBus } from '../core/events.ts';
+import type { NetClientEvents } from '../net/net-client.ts';
+import type { ChannelIdentity } from '../config/identity.ts';
+import type { BootstrapResult } from '../config/bootstrap.ts';
+import type { PlatformSession } from './session.ts';
+import type { RoomRPCBus } from './room-rpc-bus.ts';
+
+/**
+ * StartupOrchestrator：把启动链路串起来的纯逻辑编排器。
+ *
+ * 流程：bootstrap() → onLogin()（由 PlatformSession 在收到 login 事件后调用）→ ready
+ *
+ * 不直接构造 NetClient / RoomRPCBus（依赖注入），便于单测覆盖全部阶段。
+ * 不主动连 WS/发包——NetClient 由业务侧触发 start(),本类只编排阶段信号。
+ *
+ * 启动门控四条件（C 规范 §6.1）：资源（外部）/ WS onopen（NetClient.on）/ 配置（本类 bootstrap）/ 加载计时器（外部）。
+ * waitForReady() 合并后三个为「就绪信号」，UI 层 await 进入登录页。
+ */
+export interface StartupOptions {
+  session: PlatformSession;
+  bus: EventBus<NetClientEvents>;
+  /** 返回 bootstrap 结果（远程配置 + 身份 + 服务器列表） */
+  getBootstrapResult: () => Promise<BootstrapResult>;
+  /** 构造 NetClient 的工厂（注入避免硬依赖真 WS） */
+  makeNetClient: () => { bus: EventBus<NetClientEvents> };
+  /** 用于 session 初始化的身份字段 */
+  identity: ChannelIdentity;
+  /** 构造 RoomRPCBus 的工厂 */
+  roomBusFactory: (session: PlatformSession, bus: EventBus<NetClientEvents>) => RoomRPCBus;
+}
+
+export class StartupOrchestrator {
+  bootstrapResult: BootstrapResult | null = null;
+  private readyResolve: (() => void) | null = null;
+  private readyPromise: Promise<void>;
+  private roomBus: RoomRPCBus | null = null;
+  private netClient: { bus: EventBus<NetClientEvents> } | null = null;
+
+  constructor(private readonly opts: StartupOptions) {
+    // 立即构造一个 pending Promise,UI 层可提前 await
+    this.readyPromise = new Promise<void>((resolve) => {
+      this.readyResolve = resolve;
+    });
+  }
+
+  /** 阶段 1：拉取并解析远程配置,失败显式抛错 */
+  async bootstrap(): Promise<BootstrapResult> {
+    const result = await this.opts.getBootstrapResult();
+    this.bootstrapResult = result;
+    // 把身份 + 服务器写入 AppStore(session 在构造时已订阅 login 等事件,
+    // 这里直接驱动 AppStore.setServers/setIdentity 以提前有数据)
+    this.opts.session.app.setServers(result.servers);
+    this.opts.session.app.setIdentity(result.identity);
+    return result;
+  }
+
+  /**
+   * 阶段 2/3：构造 NetClient + RoomRPCBus,准备就绪（但不主动 start 连接;
+   * 业务侧在收到 phase=connected 后再 netClient.start()）。
+   *
+   * 通常 PlatformSession 收到 'login' 事件后调用此方法——login 事件
+   * 表明 NetClient 已 start 且 server 已响应 player_login。
+   */
+  async onLogin(): Promise<void> {
+    // 构造 NetClient（业务侧会调用 start() 真正建立 WS）
+    this.netClient = this.opts.makeNetClient();
+    // 构造 RoomRPCBus 并立即 start,把 room route 的包挂到 bus
+    this.roomBus = this.opts.roomBusFactory(this.opts.session, this.netClient.bus);
+    this.roomBus.start();
+    // 触发 ready 信号
+    if (this.readyResolve) { this.readyResolve(); this.readyResolve = null; }
+  }
+
+  /** UI 层等待「bootstrap + login + 房间 rpc 通道就绪」 */
+  async waitForReady(): Promise<void> {
+    return this.readyPromise;
+  }
+
+  isReady(): boolean { return this.readyResolve === null; }
+
+  /** 清理：停止 RoomRPCBus + 关闭 NetClient */
+  shutdown(): void {
+    this.roomBus?.stop();
+    this.roomBus = null;
+    this.netClient = null;
+  }
+}
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diff --git a/cocoscreator_projects/framework-tests/platform/startup.test.ts b/cocoscreator_projects/framework-tests/platform/startup.test.ts
new file mode 100644
index 0000000..1c57888
--- /dev/null
+++ b/cocoscreator_projects/framework-tests/platform/startup.test.ts
@@ -0,0 +1,132 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { StartupOrchestrator } from '../../YouleNexus/assets/framework/platform/startup.ts';
+import { PlatformSession } from '../../YouleNexus/assets/framework/platform/session.ts';
+import { EventBus } from '../../YouleNexus/assets/framework/core/events.ts';
+import type { NetClientEvents } from '../../YouleNexus/assets/framework/net/net-client.ts';
+import type { BootstrapResult } from '../../YouleNexus/assets/framework/config/bootstrap.ts';
+
+const IDENTITY = { agentid: 'A', channelid: 'C', gameid: 'G', marketid: 4, version: 10000 };
+
+function bootstrapOf(): BootstrapResult {
+  return {
+    mode: 'debug', isDebugger: true,
+    identity: IDENTITY,
+    servers: ['ws://test'],
+    rawConfig: null,
+    profile: { name: 'debug' },
+  };
+}
+
+test('StartupOrchestrator: 启动流程 bootstrap → onLogin → ready', async () => {
+  const bus = new EventBus<NetClientEvents>();
+  const session = new PlatformSession(bus);
+  let startedRoomBus = false;
+
+  const orch = new StartupOrchestrator({
+    session,
+    bus,
+    getBootstrapResult: async () => bootstrapOf(),
+    makeNetClient: () => ({ bus }) as any,
+    identity: IDENTITY,
+    roomBusFactory: () => ({
+      start() { startedRoomBus = true; },
+      stop() { startedRoomBus = false; },
+    } as any),
+  });
+
+  await orch.bootstrap();
+  assert.equal(orch.bootstrapResult?.servers[0], 'ws://test');
+  assert.equal(session.app.state.value.servers[0], 'ws://test', 'servers 应写入 AppStore');
+  assert.equal(session.app.state.value.identity?.agentid, 'A', 'identity 应写入 AppStore');
+
+  // 模拟 NetClient 发出 login 事件(让 session 把 phase 推到 loggedIn)
+  bus.emit('login', { state: 0, playerid: 100, nickname: '甲', agentid: 'A', channelid: 'C' } as any);
+
+  await orch.onLogin();
+  assert.equal(session.app.state.value.phase, 'loggedIn');
+  assert.equal(startedRoomBus, true, 'RoomRPCBus 应已 start');
+  assert.equal(orch.isReady(), true);
+
+  await orch.waitForReady();
+});
+
+test('StartupOrchestrator: bootstrap 失败显式抛错', async () => {
+  const bus = new EventBus<NetClientEvents>();
+  const session = new PlatformSession(bus);
+  const orch = new StartupOrchestrator({
+    session,
+    bus,
+    getBootstrapResult: async () => { throw new Error('远程配置抓取失败'); },
+    makeNetClient: () => ({} as any),
+    identity: IDENTITY,
+    roomBusFactory: () => ({ start() {}, stop() {} } as any),
+  });
+  await assert.rejects(() => orch.bootstrap(), /远程配置抓取失败/);
+  assert.equal(orch.bootstrapResult, null, 'bootstrap 失败时不写入 result');
+});
+
+test('StartupOrchestrator: waitForReady 在 ready 之前不 resolve', async () => {
+  const bus = new EventBus<NetClientEvents>();
+  const session = new PlatformSession(bus);
+  const orch = new StartupOrchestrator({
+    session,
+    bus,
+    getBootstrapResult: async () => bootstrapOf(),
+    makeNetClient: () => ({}) as any,
+    identity: IDENTITY,
+    roomBusFactory: () => ({ start() {}, stop() {} } as any),
+  });
+
+  let resolved = false;
+  const p = orch.waitForReady().then(() => { resolved = true; });
+  await new Promise((r) => setImmediate(r));
+  assert.equal(resolved, false, 'ready 之前不应 resolve');
+
+  await orch.onLogin();
+  await p;
+  assert.equal(resolved, true);
+});
+
+test('StartupOrchestrator: shutdown 停止 RoomRPCBus', async () => {
+  const bus = new EventBus<NetClientEvents>();
+  const session = new PlatformSession(bus);
+  let stopped = false;
+  const orch = new StartupOrchestrator({
+    session,
+    bus,
+    getBootstrapResult: async () => bootstrapOf(),
+    makeNetClient: () => ({}) as any,
+    identity: IDENTITY,
+    roomBusFactory: () => ({
+      start() {},
+      stop() { stopped = true; },
+    } as any),
+  });
+
+  await orch.bootstrap();
+  await orch.onLogin();
+  orch.shutdown();
+  assert.equal(stopped, true);
+});
+
+test('StartupOrchestrator: bootstrap 可独立调用(不依赖 onLogin)', async () => {
+  const bus = new EventBus<NetClientEvents>();
+  const session = new PlatformSession(bus);
+  const orch = new StartupOrchestrator({
+    session,
+    bus,
+    getBootstrapResult: async () => bootstrapOf(),
+    makeNetClient: () => ({}) as any,
+    identity: IDENTITY,
+    roomBusFactory: () => ({ start() {}, stop() {} } as any),
+  });
+
+  await orch.bootstrap();
+  // waitForReady 还未 resolve(未调 onLogin)
+  const ready = orch.waitForReady();
+  let resolved = false;
+  ready.then(() => { resolved = true; });
+  await new Promise((r) => setImmediate(r));
+  assert.equal(resolved, false, '仅 bootstrap 不足以触发 ready');
+});
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