diff --git a/apps/api/src/application/system/console-update-service.test.ts b/apps/api/src/application/system/console-update-service.test.ts
new file mode 100644
index 0000000..b5e0e59
--- /dev/null
+++ b/apps/api/src/application/system/console-update-service.test.ts
@@ -0,0 +1,468 @@
+import Database from 'better-sqlite3';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+import { migrateDatabase } from '../../infrastructure/database/migrations.js';
+import {
+  ConsoleUpdateService,
+  UpdateError,
+  createLaunchdRestartLauncher,
+  parseManifestVersion,
+  parseShortStat,
+  type UpdateCommandResult,
+  type UpdateCommandRunner,
+} from './console-update-service.js';
+
+const LOCAL = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa';
+const REMOTE = 'bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb';
+
+const dbs: Database.Database[] = [];
+afterEach(() => {
+  for (const db of dbs.splice(0)) db.close();
+});
+
+interface FakeGit {
+  readonly calls: string[];
+  runner: UpdateCommandRunner;
+  head: string;
+  remoteHead: string;
+  dirty: string;
+  fastForwardable: boolean;
+  /** Whether HEAD already carries the remote commit: true means the checkout is ahead. */
+  containsRemote: boolean;
+  /** Command prefixes that should fail, e.g. `git` or `git merge-base`. */
+  failing: Set<string>;
+}
+
+/** Matches a `command arg ...` key against the configured failing prefixes. */
+function fails(patterns: ReadonlySet<string>, key: string): boolean {
+  const tokens = key.split(' ');
+  for (const pattern of patterns) {
+    const wanted = pattern.split(' ');
+    if (wanted.length <= tokens.length && wanted.every((token, index) => tokens[index] === token))
+      return true;
+  }
+  return false;
+}
+
+function fakeGit(overrides: Partial<Pick<FakeGit, 'head' | 'remoteHead'>> = {}): FakeGit {
+  const state: FakeGit = {
+    calls: [],
+    head: overrides.head ?? LOCAL,
+    remoteHead: overrides.remoteHead ?? REMOTE,
+    dirty: '',
+    fastForwardable: true,
+    containsRemote: false,
+    failing: new Set<string>(),
+    runner: { run: async () => ({ code: 0, stdout: '', stderr: '' }) },
+  };
+  const run = async (command: string, args: readonly string[]): Promise<UpdateCommandResult> => {
+    const key = [command, ...args].join(' ');
+    state.calls.push(key);
+    if (fails(state.failing, key)) return { code: 1, stdout: '', stderr: `${key} failed` };
+    if (command === 'git') {
+      if (args[0] === 'rev-parse' && args[1] === 'HEAD')
+        return { code: 0, stdout: `${state.head}\n`, stderr: '' };
+      if (args[0] === 'rev-parse' && args[1] === '--abbrev-ref')
+        return { code: 0, stdout: 'main\n', stderr: '' };
+      if (args[0] === 'config')
+        return { code: 0, stdout: 'https://example.test/repo.git\n', stderr: '' };
+      if (args[0] === 'ls-remote')
+        return { code: 0, stdout: `${state.remoteHead}\trefs/heads/main\n`, stderr: '' };
+      if (args[0] === 'rev-parse' && args[1] === 'FETCH_HEAD')
+        return { code: 0, stdout: `${state.remoteHead}\n`, stderr: '' };
+      if (args[0] === 'merge-base') {
+        // `HEAD FETCH_HEAD` asks whether we can fast-forward; `<sha> HEAD` asks whether the
+        // checkout already contains the remote commit.
+        const fastForward = args[3] === 'FETCH_HEAD';
+        const ok = fastForward ? state.fastForwardable : state.containsRemote;
+        return { code: ok ? 0 : 1, stdout: '', stderr: '' };
+      }
+      if (args[0] === 'rev-list') return { code: 0, stdout: '3\n', stderr: '' };
+      if (args[0] === 'diff')
+        return {
+          code: 0,
+          stdout: ' 2 files changed, 34 insertions(+), 6 deletions(-)\n',
+          stderr: '',
+        };
+      if (args[0] === 'show')
+        return { code: 0, stdout: '{"name":"multi-simadmin","version":"0.9.0"}', stderr: '' };
+      if (args[0] === 'status') return { code: 0, stdout: state.dirty, stderr: '' };
+      return { code: 0, stdout: '', stderr: '' };
+    }
+    return { code: 0, stdout: '', stderr: '' };
+  };
+  state.runner = { run };
+  return state;
+}
+
+function service(
+  input: {
+    readonly git?: FakeGit;
+    readonly launcher?: { supported: boolean; restart: () => Promise<void> };
+    readonly restartDelayMs?: number;
+    readonly preInstallBackup?: (targetCommit: string) => Promise<string>;
+  } = {},
+) {
+  const db = new Database(':memory:');
+  migrateDatabase(db);
+  dbs.push(db);
+  const git = input.git ?? fakeGit();
+  const serviceOptions = {
+    db,
+    version: '0.1.0',
+    runner: git.runner,
+    now: () => new Date('2026-09-06T00:00:00.000Z'),
+    launcher: input.launcher ?? { supported: false, async restart() {} },
+    ...(input.preInstallBackup ? { preInstallBackup: input.preInstallBackup } : {}),
+    ...(input.restartDelayMs === undefined ? {} : { restartDelayMs: input.restartDelayMs }),
+  } as const;
+  return { db, git, updates: new ConsoleUpdateService(serviceOptions) };
+}
+
+describe('update helpers', () => {
+  it('adds insertions and deletions into one change count', () => {
+    expect(parseShortStat(' 2 files changed, 34 insertions(+), 6 deletions(-)')).toEqual({
+      files: 2,
+      lines: 40,
+    });
+  });
+
+  it('survives an empty or malformed shortstat', () => {
+    expect(parseShortStat('')).toEqual({ files: 0, lines: 0 });
+    expect(parseShortStat('1 file changed, 2 insertions(+)')).toEqual({ files: 1, lines: 2 });
+  });
+
+  it('reads a version out of a manifest and ignores broken JSON', () => {
+    expect(parseManifestVersion('{"version":"1.2.3"}')).toBe('1.2.3');
+    expect(parseManifestVersion('not json')).toBe('');
+    expect(parseManifestVersion('{"version":42}')).toBe('');
+  });
+});
+
+describe('ConsoleUpdateService', () => {
+  it('starts idle but ready to install on a git checkout', async () => {
+    const { updates } = service();
+    const status = await updates.status();
+    expect(status.phase).toBe('idle');
+    expect(status.deploymentMode).toBe('git');
+    expect(status.installSupported).toBe(true);
+    expect(status.restartSupported).toBe(false);
+    expect(status.release).toBeNull();
+  });
+
+  it('reports the manual deployment mode when git cannot resolve HEAD', async () => {
+    const git = fakeGit();
+    git.failing.add('git');
+    const { updates } = service({ git });
+    const status = await updates.status();
+    expect(status.deploymentMode).toBe('manual');
+    expect(status.installSupported).toBe(false);
+    expect(status.message).toContain('手动更新');
+  });
+
+  it('says the console is current when the remote matches HEAD', async () => {
+    const git = fakeGit({ remoteHead: LOCAL });
+    const { updates } = service({ git });
+    const status = await updates.check();
+    expect(status.phase).toBe('up_to_date');
+    expect(status.release?.status).toBe('latest');
+    expect(status.message).toContain('已是最新版本');
+  });
+
+  it('offers a download when the remote moved ahead', async () => {
+    const git = fakeGit();
+    const { updates } = service({ git });
+    const status = await updates.check();
+    expect(status.phase).toBe('update_available');
+    expect(status.release?.latestCommit).toBe(REMOTE);
+    expect(status.release?.latestVersion).toBe('');
+  });
+
+  it('says the console is ahead when the checkout already carries the remote commit', async () => {
+    const git = fakeGit();
+    git.containsRemote = true;
+    const { updates } = service({ git });
+    const status = await updates.check();
+    expect(status.phase).toBe('up_to_date');
+    expect(status.release?.status).toBe('latest');
+    expect(status.release?.ahead).toBe(3);
+    expect(status.message).toContain('领先更新源');
+    expect(status.release?.summary).toContain('全部提交');
+    // The download button stays closed because nothing was queued.
+    await expect(updates.install()).rejects.toMatchObject({ code: 'STATE' });
+  });
+
+  it('treats an unfetchable remote commit as an update rather than a local lead', async () => {
+    const git = fakeGit();
+    git.failing.add('git merge-base');
+    const { updates } = service({ git });
+    const status = await updates.check();
+    expect(status.phase).toBe('update_available');
+    expect(status.release?.ahead).toBe(0);
+  });
+
+  it('refuses to check a detached HEAD', async () => {
+    const git = fakeGit();
+    const original = git.runner.run.bind(git.runner);
+    git.runner = {
+      run: async (command, args, options) =>
+        command === 'git' && args[0] === 'rev-parse' && args[1] === '--abbrev-ref'
+          ? { code: 0, stdout: 'HEAD\n', stderr: '' }
+          : original(command, args, options),
+    };
+    const { updates } = service({ git });
+    await expect(updates.check()).rejects.toMatchObject({ code: 'STATE' });
+  });
+
+  it('fetches, verifies and describes the candidate', async () => {
+    const git = fakeGit();
+    const { updates } = service({ git });
+    await updates.check();
+    const status = await updates.download();
+    expect(status.phase).toBe('ready');
+    expect(status.release?.ahead).toBe(3);
+    expect(status.release?.changedFiles).toBe(2);
+    expect(status.release?.changedLines).toBe(40);
+    expect(status.release?.latestVersion).toBe('0.9.0');
+    expect(status.message).toContain('3 个提交');
+    expect(git.calls.some((call) => call.startsWith('git fetch'))).toBe(true);
+  });
+
+  it('refuses to download before a check', async () => {
+    const { updates } = service();
+    await expect(updates.download()).rejects.toBeInstanceOf(UpdateError);
+  });
+
+  it('keeps the code untouched when the branch cannot fast-forward', async () => {
+    const git = fakeGit();
+    git.fastForwardable = false;
+    const { updates } = service({ git });
+    await updates.check();
+    const status = await updates.download();
+    expect(status.phase).toBe('failed');
+    expect(status.error).toContain('快进');
+    expect(git.calls.some((call) => call.startsWith('git merge --ff-only'))).toBe(false);
+  });
+
+  it('installs a verified candidate and queues the restart', async () => {
+    const git = fakeGit();
+    const { updates } = service({ git });
+    await updates.check();
+    await updates.download();
+    const status = await updates.install();
+    expect(status.phase).toBe('install_queued');
+    expect(git.calls).toContain(`git merge --ff-only ${REMOTE}`);
+    expect(git.calls).toContain('corepack pnpm install --frozen-lockfile');
+    expect(git.calls).toContain('corepack pnpm --filter @multi-simadmin/web build');
+  });
+
+  it('will not install over uncommitted work', async () => {
+    const git = fakeGit();
+    git.dirty = ' M apps/api/src/control-plane.ts\n';
+    const { updates } = service({ git });
+    await updates.check();
+    await updates.download();
+    await expect(updates.install()).rejects.toMatchObject({ code: 'STATE' });
+    expect(git.calls.some((call) => call.startsWith('git merge --ff-only'))).toBe(false);
+  });
+
+  it('rolls the checkout back when the build fails', async () => {
+    const git = fakeGit();
+    const original = git.runner.run.bind(git.runner);
+    git.runner = {
+      run: async (command, args, options) =>
+        command === 'corepack' && args.includes('build')
+          ? { code: 2, stdout: '', stderr: 'vite exited 1' }
+          : original(command, args, options),
+    };
+    const { updates } = service({ git });
+    await updates.check();
+    await updates.download();
+    await expect(updates.install()).rejects.toMatchObject({ code: 'COMMAND' });
+    const status = await updates.status();
+    expect(status.phase).toBe('rolled_back');
+    expect(status.error).toContain('回滚');
+    expect(git.calls).toContain(`git reset --hard ${LOCAL}`);
+  });
+
+  it('snapshots the configuration before the checkout moves', async () => {
+    const snapshots: string[] = [];
+    const { git, updates } = service({
+      preInstallBackup: async (target) => {
+        snapshots.push(target);
+        return 'multi-simadmin-components-auto-preupdate.json';
+      },
+    });
+    await updates.check();
+    await updates.download();
+    const status = await updates.install();
+    expect(snapshots).toEqual([REMOTE]);
+    expect(status.phase).toBe('install_queued');
+    // The snapshot has to land before the merge, otherwise there is nothing to return to.
+    expect(git.calls.some((call) => call.startsWith('git merge --ff-only'))).toBe(true);
+  });
+
+  it('aborts the install when the safety snapshot cannot be written', async () => {
+    const { git, updates } = service({
+      preInstallBackup: async () => {
+        throw new Error('disk full');
+      },
+    });
+    await updates.check();
+    await updates.download();
+    await expect(updates.install()).rejects.toMatchObject({ code: 'COMMAND' });
+    const status = await updates.status();
+    expect(status.phase).toBe('failed');
+    expect(status.message).toContain('更新前备份失败');
+    expect(git.calls.some((call) => call.startsWith('git merge --ff-only'))).toBe(false);
+  });
+
+  it('requires a verified package before installing', async () => {
+    const { updates } = service();
+    await updates.check();
+    await expect(updates.install()).rejects.toMatchObject({ code: 'STATE' });
+  });
+
+  it('reports 501 when nothing supervises the process', async () => {
+    const { updates } = service();
+    await expect(updates.restart()).rejects.toMatchObject({
+      code: 'NOT_SUPPORTED',
+      statusCode: 501,
+    });
+  });
+
+  it('hands a queued install to the supervisor', async () => {
+    const restart = vi.fn(async () => undefined);
+    const { updates } = service({
+      launcher: { supported: true, restart },
+      restartDelayMs: 0,
+    });
+    await updates.check();
+    await updates.download();
+    await updates.install();
+    const status = await updates.restart();
+    expect(status.phase).toBe('restarting');
+    await new Promise((resolve) => setTimeout(resolve, 10));
+    expect(restart).toHaveBeenCalledTimes(1);
+  });
+
+  it('confirms its own update once the restarted process sees the new commit', async () => {
+    const before = fakeGit();
+    const first = service({
+      git: before,
+      launcher: { supported: true, restart: async () => undefined },
+      restartDelayMs: 0,
+    });
+    await first.updates.check();
+    await first.updates.download();
+    await first.updates.install();
+    await first.updates.restart();
+    await new Promise((resolve) => setTimeout(resolve, 10));
+
+    // Same database, new process: HEAD moved to the target commit during the restart.
+    const after = fakeGit({ head: REMOTE });
+    const reopened = new ConsoleUpdateService({
+      db: first.db,
+      version: '0.9.0',
+      runner: after.runner,
+      now: () => new Date('2026-09-06T00:05:00.000Z'),
+    });
+    const status = await reopened.status();
+    expect(status.phase).toBe('up_to_date');
+    expect(status.message).toContain('完成重启');
+  });
+
+  it('marks a restart that came back on the old commit as failed', async () => {
+    const git = fakeGit();
+    const { updates, db } = service({
+      git,
+      launcher: { supported: true, restart: async () => {} },
+      restartDelayMs: 0,
+    });
+    await updates.check();
+    await updates.download();
+    await updates.install();
+    await updates.restart();
+    const reopened = new ConsoleUpdateService({
+      db,
+      version: '0.1.0',
+      runner: git.runner,
+      now: () => new Date('2026-09-06T00:05:00.000Z'),
+    });
+    const status = await reopened.status();
+    expect(status.phase).toBe('failed');
+    expect(status.error).toContain('目标版本');
+  });
+
+  it('rejects a second command while one is running', async () => {
+    const git = fakeGit();
+    let release: () => void = () => {};
+    const gate = new Promise<void>((resolve) => {
+      release = resolve;
+    });
+    const original = git.runner.run.bind(git.runner);
+    git.runner = {
+      run: async (command, args, options) => {
+        if (command === 'git' && args[0] === 'ls-remote') await gate;
+        return original(command, args, options);
+      },
+    };
+    const { updates } = service({ git });
+    const first = updates.check();
+    await expect(updates.check()).rejects.toMatchObject({ code: 'BUSY' });
+    release();
+    await first;
+  });
+
+  it('keeps a corrupt stored state readable', async () => {
+    const { db, updates } = service();
+    db.prepare(
+      `INSERT INTO app_settings (key,value_json,created_at,updated_at)
+       VALUES ('console.update','{not json',?,?)`,
+    ).run('2026-09-06T00:00:00.000Z', '2026-09-06T00:00:00.000Z');
+    const status = await updates.status();
+    expect(status.phase).toBe('idle');
+  });
+});
+
+describe('createLaunchdRestartLauncher', () => {
+  it('is unsupported without a launchd label', () => {
+    const launcher = createLaunchdRestartLauncher({
+      env: {},
+      runner: { run: async () => ({ code: 0, stdout: '', stderr: '' }) },
+      uid: () => 501,
+    });
+    expect(launcher.supported).toBe(false);
+  });
+
+  it('kickstarts its own launchd label', async () => {
+    const calls: string[][] = [];
+    const launcher = createLaunchdRestartLauncher({
+      env: { XPC_SERVICE_NAME: 'fun.chickliu.multi-simadmin-api' },
+      runner: {
+        run: async (command, args) => {
+          calls.push([command, ...args]);
+          return { code: 0, stdout: '', stderr: '' };
+        },
+      },
+      uid: () => 501,
+    });
+    expect(launcher.supported).toBe(true);
+    await launcher.restart();
+    expect(calls[0]).toEqual([
+      'launchctl',
+      'kickstart',
+      '-k',
+      'gui/501/fun.chickliu.multi-simadmin-api',
+    ]);
+  });
+
+  it('surfaces a launchctl failure', async () => {
+    const launcher = createLaunchdRestartLauncher({
+      env: { XPC_SERVICE_NAME: 'fun.chickliu.multi-simadmin-api' },
+      runner: { run: async () => ({ code: 1, stdout: '', stderr: 'Could not find service' }) },
+      uid: () => 501,
+    });
+    await expect(launcher.restart()).rejects.toMatchObject({ code: 'COMMAND', statusCode: 500 });
+  });
+});
diff --git a/apps/api/src/application/system/console-update-service.ts b/apps/api/src/application/system/console-update-service.ts
new file mode 100644
index 0000000..76aa8c0
--- /dev/null
+++ b/apps/api/src/application/system/console-update-service.ts
@@ -0,0 +1,736 @@
+import { spawn } from 'node:child_process';
+import type Database from 'better-sqlite3';
+
+/**
+ * Online update for the console itself, modelled on the Hub update card: check a remote
+ * branch, fetch and verify the candidate, install it, then hand the process back to the
+ * supervisor. Each step is a separate, operator-visible phase, so a half-finished update stays
+ * readable after a crash instead of silently half-applied.
+ */
+export const UPDATE_PHASES = [
+  'idle',
+  'checking',
+  'up_to_date',
+  'update_available',
+  'downloading',
+  'ready',
+  'installing',
+  'install_queued',
+  'restarting',
+  'failed',
+  'rolled_back',
+] as const;
+
+export type UpdatePhase = (typeof UPDATE_PHASES)[number];
+
+/** Phases where work is in flight: the UI polls these fast and refuses a second command. */
+export const BUSY_UPDATE_PHASES: ReadonlySet<UpdatePhase> = new Set<UpdatePhase>([
+  'checking',
+  'downloading',
+  'installing',
+  'install_queued',
+  'restarting',
+]);
+
+export interface UpdateRelease {
+  readonly status: 'latest' | 'update_available' | 'unavailable';
+  readonly remote: string;
+  readonly branch: string;
+  readonly currentCommit: string;
+  readonly latestCommit: string;
+  readonly currentVersion: string;
+  readonly latestVersion: string;
+  readonly ahead: number;
+  readonly changedFiles: number;
+  readonly changedLines: number;
+  readonly summary: string;
+}
+
+export interface UpdateStatus {
+  readonly phase: UpdatePhase;
+  readonly message: string;
+  readonly error: string;
+  readonly progressPercent: number;
+  readonly checkedAt: string;
+  readonly deploymentMode: 'git' | 'manual';
+  readonly installSupported: boolean;
+  readonly restartSupported: boolean;
+  readonly release: UpdateRelease | null;
+}
+
+export interface UpdateCommandResult {
+  readonly code: number;
+  readonly stdout: string;
+  readonly stderr: string;
+}
+
+export interface UpdateCommandRunner {
+  run(
+    command: string,
+    args: readonly string[],
+    options?: { readonly timeoutMs?: number },
+  ): Promise<UpdateCommandResult>;
+}
+
+export interface RestartLauncher {
+  readonly supported: boolean;
+  restart(): Promise<void>;
+}
+
+export class UpdateError extends Error {
+  constructor(
+    readonly code: 'BUSY' | 'NOT_SUPPORTED' | 'STATE' | 'COMMAND',
+    message: string,
+    readonly statusCode = 409,
+  ) {
+    super(message);
+    this.name = 'UpdateError';
+  }
+}
+
+const STATE_KEY = 'console.update';
+const DEFAULT_TIMEOUT_MS = 120_000;
+const INSTALL_TIMEOUT_MS = 15 * 60_000;
+const MAX_OUTPUT = 4 * 1024 * 1024;
+const COMMIT = /^[0-9a-f]{7,40}$/u;
+
+type PendingAction = 'install' | 'restart' | '';
+
+interface PersistedState {
+  readonly phase: UpdatePhase;
+  readonly message: string;
+  readonly error: string;
+  readonly progressPercent: number;
+  readonly checkedAt: string;
+  readonly release: UpdateRelease | null;
+  /** Where the update is aimed; lets a restarted process confirm its own success. */
+  readonly pendingCommit: string;
+  readonly pendingAction: PendingAction;
+}
+
+function text(value: unknown, maximum = 512): string {
+  return typeof value === 'string' ? value.slice(0, maximum) : '';
+}
+
+function count(value: unknown): number {
+  return typeof value === 'number' && Number.isSafeInteger(value) && value >= 0 ? value : 0;
+}
+
+function percent(value: unknown): number {
+  return typeof value === 'number' && Number.isFinite(value)
+    ? Math.min(100, Math.max(0, Math.round(value)))
+    : 0;
+}
+
+function phaseOf(value: unknown): UpdatePhase {
+  return typeof value === 'string' && (UPDATE_PHASES as readonly string[]).includes(value)
+    ? (value as UpdatePhase)
+    : 'idle';
+}
+
+function readRelease(value: unknown): UpdateRelease | null {
+  if (typeof value !== 'object' || value === null || Array.isArray(value)) return null;
+  const source = value as Record<string, unknown>;
+  const status = source.status;
+  return {
+    status:
+      status === 'latest' || status === 'update_available' || status === 'unavailable'
+        ? status
+        : 'unavailable',
+    remote: text(source.remote, 256),
+    branch: text(source.branch, 128),
+    currentCommit: text(source.currentCommit, 40),
+    latestCommit: text(source.latestCommit, 40),
+    currentVersion: text(source.currentVersion, 64),
+    latestVersion: text(source.latestVersion, 64),
+    ahead: count(source.ahead),
+    changedFiles: count(source.changedFiles),
+    changedLines: count(source.changedLines),
+    summary: text(source.summary, 512),
+  };
+}
+
+/** `2 files changed, 34 insertions(+), 6 deletions(-)` from `git diff --shortstat`. */
+export function parseShortStat(value: string): { files: number; lines: number } {
+  const files = Number(/(\d+) files? changed/u.exec(value)?.[1] ?? 0);
+  const insertions = Number(/(\d+) insertions?\(\+\)/u.exec(value)?.[1] ?? 0);
+  const deletions = Number(/(\d+) deletions?\(-\)/u.exec(value)?.[1] ?? 0);
+  return {
+    files: Number.isFinite(files) ? files : 0,
+    lines:
+      (Number.isFinite(insertions) ? insertions : 0) + (Number.isFinite(deletions) ? deletions : 0),
+  };
+}
+
+/** Reads the version field out of a package.json blob fetched from a commit. */
+export function parseManifestVersion(value: string): string {
+  try {
+    const parsed: unknown = JSON.parse(value);
+    if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
+      const version = (parsed as Record<string, unknown>).version;
+      if (typeof version === 'string' && version.length <= 64) return version;
+    }
+  } catch {
+    // A malformed manifest simply means there is no version to show.
+  }
+  return '';
+}
+
+export function createCommandRunner(options: {
+  readonly cwd: string;
+  readonly timeoutMs?: number;
+}): UpdateCommandRunner {
+  return {
+    run(command, args, runOptions) {
+      return new Promise((resolve) => {
+        const child = spawn(command, [...args], { cwd: options.cwd, shell: false });
+        let stdout = '';
+        let stderr = '';
+        const timer = setTimeout(
+          () => child.kill('SIGKILL'),
+          runOptions?.timeoutMs ?? options.timeoutMs ?? DEFAULT_TIMEOUT_MS,
+        );
+        child.stdout.on('data', (chunk: Buffer) => {
+          if (stdout.length < MAX_OUTPUT) stdout += chunk.toString('utf8');
+        });
+        child.stderr.on('data', (chunk: Buffer) => {
+          if (stderr.length < MAX_OUTPUT) stderr += chunk.toString('utf8');
+        });
+        child.once('error', (error: Error) => {
+          clearTimeout(timer);
+          resolve({ code: -1, stdout, stderr: `${stderr}${error.message}` });
+        });
+        child.once('close', (code) => {
+          clearTimeout(timer);
+          resolve({ code: code ?? -1, stdout, stderr });
+        });
+      });
+    },
+  };
+}
+
+/**
+ * macOS LaunchAgents learn their own label through XPC_SERVICE_NAME, which is the only
+ * dependable hint that this process is supervised and will be started again after it exits.
+ */
+export function createLaunchdRestartLauncher(input: {
+  readonly env: Readonly<Record<string, string | undefined>>;
+  readonly runner: UpdateCommandRunner;
+  readonly uid?: () => number | undefined;
+}): RestartLauncher {
+  const label = text(input.env.XPC_SERVICE_NAME, 256);
+  const uid =
+    input.uid?.() ?? (typeof process.getuid === 'function' ? process.getuid() : undefined);
+  const supported = label.length > 0 && typeof uid === 'number';
+  return {
+    supported,
+    async restart() {
+      if (!supported) throw new UpdateError('NOT_SUPPORTED', '当前进程未受服务管理器托管。', 501);
+      const result = await input.runner.run('launchctl', [
+        'kickstart',
+        '-k',
+        `gui/${uid}/${label}`,
+      ]);
+      if (result.code !== 0)
+        throw new UpdateError(
+          'COMMAND',
+          text(result.stderr, 200) || 'launchctl kickstart 失败。',
+          500,
+        );
+    },
+  };
+}
+
+export interface ConsoleUpdateServiceOptions {
+  readonly db: Database.Database;
+  readonly version: string;
+  readonly remote?: string;
+  readonly runner?: UpdateCommandRunner;
+  readonly launcher?: RestartLauncher;
+  readonly now?: () => Date;
+  /**
+   * Safety net run before the checkout moves: a new version may migrate the database in a way
+   * that cannot be undone by rolling the code back, so the config is snapshotted first.
+   */
+  readonly preInstallBackup?: (targetCommit: string) => Promise<string>;
+  /** Test hook: the real hand-off waits a beat so the HTTP response can flush first. */
+  readonly restartDelayMs?: number;
+}
+
+export class ConsoleUpdateService {
+  readonly #db: Database.Database;
+  readonly #version: string;
+  readonly #remote: string;
+  readonly #runner: UpdateCommandRunner;
+  readonly #launcher: RestartLauncher;
+  readonly #now: () => Date;
+  readonly #preInstallBackup: ((targetCommit: string) => Promise<string>) | undefined;
+  readonly #restartDelayMs: number;
+  #state: PersistedState;
+  #inFlight: Promise<UpdateStatus> | undefined;
+  #mode: 'unknown' | 'git' | 'manual' = 'unknown';
+  #reconciled = false;
+
+  constructor(options: ConsoleUpdateServiceOptions) {
+    this.#db = options.db;
+    this.#version = options.version;
+    this.#remote = options.remote ?? 'origin';
+    this.#runner =
+      options.runner ?? createCommandRunner({ cwd: process.cwd(), timeoutMs: DEFAULT_TIMEOUT_MS });
+    this.#launcher = options.launcher ?? { supported: false, async restart() {} };
+    this.#now = options.now ?? (() => new Date());
+    this.#preInstallBackup = options.preInstallBackup;
+    this.#restartDelayMs = options.restartDelayMs ?? 250;
+    this.#state = this.#read();
+  }
+
+  /** Resolves the deployment mode, because a plain status poll must not shell out to git. */
+  async status(): Promise<UpdateStatus> {
+    if (this.#mode === 'unknown') await this.#localHead();
+    await this.#reconcile();
+    return this.#view();
+  }
+
+  async check(): Promise<UpdateStatus> {
+    return this.#exclusive(async () => {
+      const head = await this.#localHead();
+      if (!head) return this.#view();
+      const branch = (await this.#text(['rev-parse', '--abbrev-ref', 'HEAD'])).trim();
+      const remoteUrl = (
+        await this.#text(['config', '--get', `remote.${this.#remote}.url`])
+      ).trim();
+      if (!branch || branch === 'HEAD')
+        throw new UpdateError('STATE', '当前处于游离提交，请先切回分支再检查更新。', 409);
+      if (!remoteUrl)
+        throw new UpdateError('STATE', `未配置远端 ${this.#remote}，无法检查更新。`, 409);
+
+      const listing = await this.#git(['ls-remote', remoteUrl, `refs/heads/${branch}`]);
+      if (listing.code !== 0)
+        throw new UpdateError('COMMAND', '无法连接更新源，请检查网络后重试。', 502);
+      const latest = text(listing.stdout).trim().split(/\s+/u)[0];
+      if (!latest || !COMMIT.test(latest))
+        throw new UpdateError('COMMAND', `远端分支 ${branch} 不存在或不可读。`, 502);
+
+      // A different SHA is not enough: a checkout that already carries the remote commit is
+      // ahead of the update source, not behind it. Only an ancestry test tells the two apart.
+      const behind = latest !== head && !(await this.#contains(latest));
+      const ahead = behind
+        ? 0
+        : latest === head
+          ? 0
+          : Number(await this.#text(['rev-list', '--count', `${latest}..HEAD`]));
+      const upToDate = !behind;
+      const release: UpdateRelease = {
+        status: upToDate ? 'latest' : 'update_available',
+        remote: remoteUrl,
+        branch,
+        currentCommit: head,
+        latestCommit: latest,
+        currentVersion: this.#version,
+        latestVersion: '',
+        ahead: behind ? 0 : Number.isFinite(ahead) ? ahead : 0,
+        changedFiles: 0,
+        changedLines: 0,
+        summary: behind
+          ? '下载更新包后可以看到提交数量与改动规模。'
+          : upToDate && latest !== head
+            ? `本地已包含 ${remoteUrl}/${branch} 的全部提交。`
+            : '',
+      };
+      this.#save({
+        phase: upToDate ? 'up_to_date' : 'update_available',
+        message: upToDate
+          ? latest === head
+            ? `当前已是最新版本（${head.slice(0, 7)}）。`
+            : `本地版本已领先更新源 ${Number.isFinite(ahead) ? ahead : 0} 个提交，无需更新。`
+          : `发现新版本 ${latest.slice(0, 7)}，可以下载更新包。`,
+        error: '',
+        progressPercent: 100,
+        release,
+        pendingCommit: '',
+        pendingAction: '',
+      });
+      return this.#view();
+    });
+  }
+
+  async download(): Promise<UpdateStatus> {
+    return this.#exclusive(async () => {
+      const release = this.#requireCandidate();
+      this.#save({
+        phase: 'downloading',
+        message: '正在下载并校验更新包…',
+        error: '',
+        progressPercent: 35,
+        release,
+        pendingCommit: release.latestCommit,
+        pendingAction: '',
+      });
+
+      const fetched = await this.#git([
+        'fetch',
+        '--quiet',
+        '--no-tags',
+        release.remote,
+        release.branch,
+      ]);
+      if (fetched.code !== 0) {
+        this.#fail('下载更新包失败，请检查网络后重试。');
+        throw new UpdateError('COMMAND', '下载更新包失败，请检查网络后重试。', 502);
+      }
+      const candidate = (await this.#text(['rev-parse', 'FETCH_HEAD'])).trim();
+      if (candidate !== release.latestCommit) {
+        this.#fail('远端分支已变化，请重新检查更新。');
+        throw new UpdateError('STATE', '远端分支已变化，请重新检查更新。', 409);
+      }
+      const ancestor = await this.#git(['merge-base', '--is-ancestor', 'HEAD', 'FETCH_HEAD']);
+      if (ancestor.code !== 0) {
+        this.#fail('本地分支已偏离远端，无法快进合并，请先处理本地提交。');
+        return this.#view();
+      }
+
+      const ahead = Number(await this.#text(['rev-list', '--count', 'HEAD..FETCH_HEAD']));
+      const stat = parseShortStat(await this.#text(['diff', '--shortstat', 'HEAD', 'FETCH_HEAD']));
+      const manifest = parseManifestVersion(await this.#text(['show', 'FETCH_HEAD:package.json']));
+      const commits = Number.isFinite(ahead) ? ahead : 0;
+      const updated: UpdateRelease = {
+        ...release,
+        latestVersion: manifest,
+        ahead: commits,
+        changedFiles: stat.files,
+        changedLines: stat.lines,
+        summary: `领先 ${commits} 个提交，${stat.files} 个文件、${stat.lines} 行改动。`,
+      };
+      this.#save({
+        phase: 'ready',
+        message: `更新包已校验：${updated.summary}`,
+        error: '',
+        progressPercent: 100,
+        release: updated,
+        pendingCommit: updated.latestCommit,
+        pendingAction: '',
+      });
+      return this.#view();
+    });
+  }
+
+  async install(): Promise<UpdateStatus> {
+    return this.#exclusive(async () => {
+      const release = this.#requireCandidate();
+      if (this.#state.phase !== 'ready' && this.#state.phase !== 'rolled_back')
+        throw new UpdateError('STATE', '请先下载并校验更新包。', 409);
+      // The rollback below resets the working tree, so it is only ever allowed to start from a
+      // clean one; otherwise an operator's uncommitted work would be the first casualty.
+      if ((await this.#text(['status', '--porcelain'])).trim())
+        throw new UpdateError('STATE', '工作区存在未提交改动，为避免丢失内容已中止安装。', 409);
+      const previousCommit = await this.#localHead();
+      if (!previousCommit) return this.#view();
+
+      if (this.#preInstallBackup) {
+        this.#save({
+          phase: 'installing',
+          message: '正在创建更新前备份…',
+          error: '',
+          progressPercent: 5,
+          release,
+          pendingCommit: '',
+          pendingAction: '',
+        });
+        try {
+          await this.#preInstallBackup(release.latestCommit);
+        } catch {
+          this.#fail('更新前备份失败，已中止安装，代码保持原版本。');
+          throw new UpdateError('COMMAND', '更新前备份失败，已中止安装。', 500);
+        }
+      }
+
+      this.#save({
+        phase: 'installing',
+        message: '正在安装更新…',
+        error: '',
+        progressPercent: 20,
+        release,
+        pendingCommit: release.latestCommit,
+        pendingAction: 'install',
+      });
+      const merge = await this.#git(['merge', '--ff-only', release.latestCommit]);
+      if (merge.code !== 0) {
+        this.#fail('快进合并失败，代码保持原版本。');
+        throw new UpdateError('COMMAND', '快进合并失败，代码保持原版本。', 500);
+      }
+      this.#progress(55, '依赖安装中…');
+      const dependencies = await this.#runner.run(
+        'corepack',
+        ['pnpm', 'install', '--frozen-lockfile'],
+        { timeoutMs: INSTALL_TIMEOUT_MS },
+      );
+      if (dependencies.code !== 0) {
+        await this.#rollback(previousCommit, '依赖安装失败，已回滚到原版本。');
+        throw new UpdateError('COMMAND', '依赖安装失败，已回滚到原版本。', 500);
+      }
+      this.#progress(80, '前端构建中…');
+      const build = await this.#runner.run(
+        'corepack',
+        ['pnpm', '--filter', '@multi-simadmin/web', 'build'],
+        { timeoutMs: INSTALL_TIMEOUT_MS },
+      );
+      if (build.code !== 0) {
+        await this.#rollback(previousCommit, '前端构建失败，已回滚到原版本。');
+        throw new UpdateError('COMMAND', '前端构建失败，已回滚到原版本。', 500);
+      }
+
+      this.#save({
+        phase: 'install_queued',
+        message: '安装完成，重启后生效。',
+        error: '',
+        progressPercent: 100,
+        release,
+        pendingCommit: release.latestCommit,
+        pendingAction: 'install',
+      });
+      return this.#view();
+    });
+  }
+
+  /**
+   * Hands the process back to the supervisor. The reply flushes first: killing the API in the
+   * middle of a request leaves the browser with a connection error instead of a result.
+   */
+  async restart(): Promise<UpdateStatus> {
+    if (!this.#launcher.supported)
+      throw new UpdateError('NOT_SUPPORTED', '当前部署方式不支持在线重启，请手动重启服务。', 501);
+    if (this.#inFlight) throw new UpdateError('BUSY', '更新任务正在进行中。', 409);
+    const installing = this.#state.phase === 'install_queued';
+    this.#save({
+      phase: 'restarting',
+      message: '服务正在重启，页面连接将短暂中断。',
+      error: '',
+      progressPercent: 100,
+      release: this.#state.release,
+      pendingCommit: installing ? this.#state.pendingCommit : '',
+      pendingAction: installing ? 'install' : 'restart',
+    });
+    setTimeout(() => {
+      void this.#launcher.restart().catch(() => {
+        this.#save({
+          phase: 'failed',
+          message: '重启请求未能交给服务管理器。',
+          error: '重启请求未能交给服务管理器，请手动重启服务。',
+          progressPercent: 100,
+          release: this.#state.release,
+          pendingCommit: '',
+          pendingAction: '',
+        });
+      });
+    }, this.#restartDelayMs);
+    return this.#view();
+  }
+
+  async #exclusive(action: () => Promise<UpdateStatus>): Promise<UpdateStatus> {
+    if (this.#inFlight) throw new UpdateError('BUSY', '更新任务正在进行中，请稍候。', 409);
+    const pending = (async () => {
+      try {
+        return await action();
+      } finally {
+        this.#inFlight = undefined;
+      }
+    })();
+    this.#inFlight = pending;
+    return pending;
+  }
+
+  #requireCandidate(): UpdateRelease {
+    const release = this.#state.release;
+    if (!release || release.status !== 'update_available' || !COMMIT.test(release.latestCommit))
+      throw new UpdateError('STATE', '请先检查更新。', 409);
+    return release;
+  }
+
+  async #localHead(): Promise<string> {
+    const result = await this.#git(['rev-parse', 'HEAD']);
+    const head = result.stdout.trim();
+    if (result.code !== 0 || !COMMIT.test(head)) {
+      this.#mode = 'manual';
+      this.#save({
+        phase: 'idle',
+        message: '当前部署不是 Git 工作副本，请按安装文档手动更新后重启。',
+        error: '',
+        progressPercent: 0,
+        release: null,
+        pendingCommit: '',
+        pendingAction: '',
+      });
+      return '';
+    }
+    this.#mode = 'git';
+    return head;
+  }
+
+  async #git(args: readonly string[]): Promise<UpdateCommandResult> {
+    return this.#runner.run('git', args);
+  }
+
+  /** True when HEAD already carries `commit`. A missing object reads as "not contained". */
+  async #contains(commit: string): Promise<boolean> {
+    if (!COMMIT.test(commit)) return false;
+    const probe = await this.#git(['merge-base', '--is-ancestor', commit, 'HEAD']);
+    return probe.code === 0;
+  }
+
+  async #text(args: readonly string[]): Promise<string> {
+    const result = await this.#git(args);
+    return result.code === 0 ? text(result.stdout) : '';
+  }
+
+  #progress(progressPercent: number, message: string): void {
+    this.#save({
+      phase: 'installing',
+      message,
+      error: '',
+      progressPercent,
+      release: this.#state.release,
+      pendingCommit: this.#state.pendingCommit,
+      pendingAction: 'install',
+    });
+  }
+
+  async #rollback(previousCommit: string, message: string): Promise<void> {
+    await this.#git(['reset', '--hard', previousCommit]);
+    this.#save({
+      phase: 'rolled_back',
+      message,
+      error: message,
+      progressPercent: 100,
+      release: this.#state.release,
+      pendingCommit: '',
+      pendingAction: '',
+    });
+  }
+
+  #fail(message: string): void {
+    this.#save({
+      phase: 'failed',
+      message,
+      error: message,
+      progressPercent: this.#state.progressPercent,
+      release: this.#state.release,
+      pendingCommit: '',
+      pendingAction: '',
+    });
+  }
+
+  /**
+   * A restarted process has no memory of the install. When the recorded target commit is now
+   * HEAD, the update landed, and that is the confirmation the UI has been waiting for.
+   */
+  async #reconcile(): Promise<void> {
+    if (this.#reconciled) return;
+    this.#reconciled = true;
+    const state = this.#state;
+    if (!state.pendingAction || !BUSY_UPDATE_PHASES.has(state.phase)) return;
+    const head = await this.#localHead();
+    if (!head) return;
+    if (state.pendingAction === 'install' && head !== state.pendingCommit) {
+      this.#save({
+        ...state,
+        phase: 'failed',
+        message: '重启后未看到目标版本，安装可能未完成。',
+        error: '重启后未看到目标版本，请查看服务日志。',
+        pendingCommit: '',
+        pendingAction: '',
+      });
+      return;
+    }
+    this.#save({
+      ...state,
+      phase: 'up_to_date',
+      message:
+        state.pendingAction === 'install'
+          ? `已更新到 ${head.slice(0, 7)} 并完成重启。`
+          : '服务已重启完成。',
+      error: '',
+      progressPercent: 100,
+      release: state.release ? { ...state.release, status: 'latest', currentCommit: head } : null,
+      pendingCommit: '',
+      pendingAction: '',
+    });
+  }
+
+  #view(): UpdateStatus {
+    const git = this.#mode === 'git';
+    return {
+      phase: this.#state.phase,
+      message: this.#state.message,
+      error: this.#state.error,
+      progressPercent: this.#state.progressPercent,
+      checkedAt: this.#state.checkedAt,
+      deploymentMode: this.#mode === 'unknown' ? 'git' : this.#mode,
+      installSupported: git,
+      restartSupported: this.#launcher.supported,
+      release: this.#state.release,
+    };
+  }
+
+  #emptyState(message: string): PersistedState {
+    return {
+      phase: 'idle',
+      message,
+      error: '',
+      progressPercent: 0,
+      checkedAt: '',
+      release: null,
+      pendingCommit: '',
+      pendingAction: '',
+    };
+  }
+
+  #read(): PersistedState {
+    let row: { value_json?: string | null } | undefined;
+    try {
+      row = this.#db.prepare('SELECT value_json FROM app_settings WHERE key = ?').get(STATE_KEY) as
+        | { value_json?: string | null }
+        | undefined;
+    } catch {
+      row = undefined;
+    }
+    if (!row?.value_json) return this.#emptyState('尚未检查更新。');
+    try {
+      const parsed: unknown = JSON.parse(row.value_json);
+      const source =
+        parsed && typeof parsed === 'object' && !Array.isArray(parsed)
+          ? (parsed as Record<string, unknown>)
+          : {};
+      const pendingAction = source.pendingAction;
+      return {
+        phase: phaseOf(source.phase),
+        message: text(source.message, 256),
+        error: text(source.error, 256),
+        progressPercent: percent(source.progressPercent),
+        checkedAt: text(source.checkedAt, 64),
+        release: readRelease(source.release),
+        pendingCommit: text(source.pendingCommit, 40),
+        pendingAction:
+          pendingAction === 'install' || pendingAction === 'restart' ? pendingAction : '',
+      };
+    } catch {
+      return this.#emptyState('尚未检查更新。');
+    }
+  }
+
+  #save(input: Omit<PersistedState, 'checkedAt'>): void {
+    const now = this.#now().toISOString();
+    this.#state = { ...input, checkedAt: now };
+    try {
+      this.#db
+        .prepare(
+          `INSERT INTO app_settings (key,value_json,created_at,updated_at)
+           VALUES (?,?,?,?)
+           ON CONFLICT(key) DO UPDATE SET value_json = excluded.value_json,
+             updated_at = excluded.updated_at`,
+        )
+        .run(STATE_KEY, JSON.stringify(this.#state), now, now);
+    } catch {
+      // A read-only database must not break the update flow; the in-memory state still leads.
+    }
+  }
+}
diff --git a/apps/api/src/interface/http/update-routes.test.ts b/apps/api/src/interface/http/update-routes.test.ts
new file mode 100644
index 0000000..1389aed
--- /dev/null
+++ b/apps/api/src/interface/http/update-routes.test.ts
@@ -0,0 +1,123 @@
+import Fastify from 'fastify';
+import { afterEach, describe, expect, it } from 'vitest';
+
+import {
+  UpdateError,
+  type ConsoleUpdateService,
+  type UpdateStatus,
+} from '../../application/system/console-update-service.js';
+import { registerUpdateRoutes } from './update-routes.js';
+
+let app: ReturnType<typeof Fastify> | undefined;
+
+function baseStatus(overrides: Partial<UpdateStatus> = {}): UpdateStatus {
+  return {
+    phase: 'update_available',
+    message: '发现新版本 1b2c3d4，可以下载更新包。',
+    error: '',
+    progressPercent: 100,
+    checkedAt: '2026-09-06T00:00:00.000Z',
+    deploymentMode: 'git',
+    installSupported: true,
+    restartSupported: true,
+    release: {
+      status: 'update_available',
+      remote: 'https://example.test/repo.git',
+      branch: 'main',
+      currentCommit: 'a'.repeat(40),
+      latestCommit: 'b'.repeat(40),
+      currentVersion: '0.1.0',
+      latestVersion: '',
+      ahead: 0,
+      changedFiles: 0,
+      changedLines: 0,
+      summary: '',
+    },
+    ...overrides,
+  };
+}
+
+function mount(partial: Partial<Record<keyof ConsoleUpdateService, () => Promise<unknown>>>) {
+  const instance = Fastify();
+  registerUpdateRoutes(instance, {
+    updates: partial as unknown as ConsoleUpdateService,
+  });
+  app = instance;
+  return instance;
+}
+
+afterEach(async () => {
+  await app?.close();
+  app = undefined;
+});
+
+describe('update routes', () => {
+  it('exposes the four update commands and the restart', async () => {
+    const calls: string[] = [];
+    const updates = {
+      status: async () => {
+        calls.push('status');
+        return baseStatus();
+      },
+      check: async () => {
+        calls.push('check');
+        return baseStatus();
+      },
+      download: async () => {
+        calls.push('download');
+        return baseStatus({ phase: 'ready' });
+      },
+      install: async () => {
+        calls.push('install');
+        return baseStatus({ phase: 'install_queued' });
+      },
+      restart: async () => {
+        calls.push('restart');
+        return baseStatus({ phase: 'restarting' });
+      },
+    };
+    const instance = Fastify();
+    registerUpdateRoutes(instance, { updates: updates as unknown as ConsoleUpdateService });
+    app = instance;
+
+    const routes = [
+      ['GET', '/api/v1/system/update'],
+      ['POST', '/api/v1/system/update/check'],
+      ['POST', '/api/v1/system/update/download'],
+      ['POST', '/api/v1/system/update/install'],
+      ['POST', '/api/v1/system/restart'],
+    ] as const;
+    for (const [method, url] of routes) {
+      const response = await instance.inject({ method, url });
+      expect(response.statusCode).toBe(200);
+      expect(response.json().phase).toBeTruthy();
+    }
+    expect(calls).toEqual(['status', 'check', 'download', 'install', 'restart']);
+  });
+
+  it('maps an update error onto a problem document', async () => {
+    const instance = mount({
+      restart: async () => {
+        throw new UpdateError('NOT_SUPPORTED', '当前部署方式不支持在线重启。', 501);
+      },
+    });
+    const response = await instance.inject({ method: 'POST', url: '/api/v1/system/restart' });
+    expect(response.statusCode).toBe(501);
+    expect(response.headers['content-type']).toContain('application/problem+json');
+    expect(response.json()).toMatchObject({
+      code: 'UPDATE_NOT_SUPPORTED',
+      title: 'Not Implemented',
+      detail: '当前部署方式不支持在线重启。',
+    });
+  });
+
+  it('keeps an unexpected failure on the global error handler', async () => {
+    const instance = mount({
+      status: async () => {
+        throw new Error('boom');
+      },
+    });
+    const response = await instance.inject({ method: 'GET', url: '/api/v1/system/update' });
+    expect(response.statusCode).toBe(500);
+  });
+});
diff --git a/apps/api/src/interface/http/update-routes.ts b/apps/api/src/interface/http/update-routes.ts
new file mode 100644
index 0000000..e315e34
--- /dev/null
+++ b/apps/api/src/interface/http/update-routes.ts
@@ -0,0 +1,85 @@
+import type { FastifyInstance, FastifyReply, FastifyRequest } from 'fastify';
+
+import {
+  UpdateError,
+  type ConsoleUpdateService,
+} from '../../application/system/console-update-service.js';
+
+export interface UpdateRoutesOptions {
+  readonly updates: ConsoleUpdateService;
+}
+
+function problem(
+  reply: FastifyReply,
+  request: FastifyRequest,
+  status: number,
+  code: string,
+  title: string,
+  detail: string,
+) {
+  return reply.code(status).type('application/problem+json').send({
+    type: 'about:blank',
+    title,
+    status,
+    code,
+    detail,
+    requestId: request.id,
+  });
+}
+
+/**
+ * The console's own update surface, mirroring the Hub: check, download, install, restart.
+ * Every action answers with the full status so the client never has to guess the next phase.
+ */
+export function registerUpdateRoutes(app: FastifyInstance, options: UpdateRoutesOptions): void {
+  const wrap =
+    <T>(action: () => Promise<T>) =>
+    async (request: FastifyRequest, reply: FastifyReply) => {
+      try {
+        return await action();
+      } catch (error) {
+        if (error instanceof UpdateError) {
+          const title =
+            error.statusCode === 501
+              ? 'Not Implemented'
+              : error.statusCode === 502
+                ? 'Bad Gateway'
+                : error.statusCode === 500
+                  ? 'Internal Server Error'
+                  : error.statusCode === 409
+                    ? 'Conflict'
+                    : 'Bad Request';
+          return problem(
+            reply,
+            request,
+            error.statusCode,
+            `UPDATE_${error.code}`,
+            title,
+            error.message,
+          );
+        }
+        throw error;
+      }
+    };
+
+  app.get(
+    '/api/v1/system/update',
+    wrap(async () => options.updates.status()),
+  );
+  app.post(
+    '/api/v1/system/update/check',
+    wrap(() => options.updates.check()),
+  );
+  app.post(
+    '/api/v1/system/update/download',
+    wrap(() => options.updates.download()),
+  );
+  app.post(
+    '/api/v1/system/update/install',
+    wrap(() => options.updates.install()),
+  );
+  app.post(
+    '/api/v1/system/restart',
+    wrap(() => options.updates.restart()),
+  );
+}
diff --git a/apps/api/src/production-control-plane.ts b/apps/api/src/production-control-plane.ts
index df1791c..dc9e87d 100644
--- a/apps/api/src/production-control-plane.ts
+++ b/apps/api/src/production-control-plane.ts
@@ -4,6 +4,10 @@ import {
   type ControlPlaneApp,
   type SafeControlPlaneUpstream,
 } from './control-plane.js';
+import {
+  createCommandRunner,
+  createLaunchdRestartLauncher,
+} from './application/system/console-update-service.js';
 import { openDatabase } from './infrastructure/database/database.js';
 import { migrateDatabase } from './infrastructure/database/migrations.js';
 import { MacOSKeychainSecretStore } from './infrastructure/secrets/keychain-secret-store.js';
@@ -23,6 +27,8 @@ export interface ProductionControlPlaneOptions {
   readonly upstreamGatewayCheck?: () => boolean | Promise<boolean>;
   /** Production keeps device online state fresh on its own; tests and canaries can opt out. */
   readonly heartbeatEnabled?: boolean;
+  /** Environment used to find the launchd label that can restart this process. */
+  readonly env?: Readonly<Record<string, string | undefined>>;
 }
 
 export function buildProductionControlPlane(
@@ -39,6 +45,9 @@ export function buildProductionControlPlane(
   try {
     migrateDatabase(db);
     const store = options.store ?? new MacOSKeychainSecretStore();
+    const env = options.env ?? process.env;
+    const updateRoot = env.MULTI_SIMADMIN_UPDATE_ROOT ?? process.cwd();
+    const updateRunner = createCommandRunner({ cwd: updateRoot, timeoutMs: 120_000 });
     const app = buildControlPlaneApp({
       db,
       store,
@@ -46,6 +55,12 @@ export function buildProductionControlPlane(
       runtimeVersion: options.runtimeVersion ?? '0.1.0',
       backupDirectory: join(dirname(options.databasePath), 'backups'),
       heartbeatEnabled: options.heartbeatEnabled ?? true,
+      update: {
+        remote: env.MULTI_SIMADMIN_UPDATE_REMOTE ?? 'origin',
+        root: updateRoot,
+        runner: updateRunner,
+        launcher: createLaunchdRestartLauncher({ env, runner: updateRunner }),
+      },
       // This route-local decision is safe only in this composition: when a token is
       // configured, buildApp's global onRequest hook rejects the request first.
       // Keep all other control-plane compositions fail-closed by default.