diff --git a/README.md b/README.md
index b3125fb0..b4861825 100644
--- a/README.md
+++ b/README.md
@@ -229,6 +229,15 @@ ccs cliproxy doctor     # Check quota status for all agy accounts
 
 **Auto-Failover**: When an Antigravity account runs out of quota, CCS automatically switches to another account with remaining capacity. Shared GCP project accounts are excluded (pooled quota).
 
+### CLIProxy Lifecycle
+
+```bash
+ccs cliproxy start      # Start CLIProxy background service
+ccs cliproxy status     # Check running status
+ccs cliproxy restart    # Restart CLIProxy service
+ccs cliproxy stop       # Stop running CLIProxy service
+```
+
 <br>
 
 ## Configuration
diff --git a/src/cliproxy/services/index.ts b/src/cliproxy/services/index.ts
index b8fa43de..b67ed7a3 100644
--- a/src/cliproxy/services/index.ts
+++ b/src/cliproxy/services/index.ts
@@ -22,10 +22,12 @@ export {
 export {
   getProxyStatus,
   stopProxy,
+  startProxy,
   isProxyRunning,
   getActiveSessionCount,
   type ProxyStatusResult,
   type StopProxyResult,
+  type StartProxyResult,
 } from './proxy-lifecycle-service';
 
 // Binary management
diff --git a/src/cliproxy/services/proxy-lifecycle-service.ts b/src/cliproxy/services/proxy-lifecycle-service.ts
index 7ea4c124..ecd888d9 100644
--- a/src/cliproxy/services/proxy-lifecycle-service.ts
+++ b/src/cliproxy/services/proxy-lifecycle-service.ts
@@ -2,13 +2,15 @@
  * CLIProxy Proxy Lifecycle Service
  *
  * Handles start/stop/status operations for CLIProxy instances.
- * Delegates to session-tracker for actual process management.
+ * Delegates to session-tracker and service-manager for actual process management.
  */
 
 import {
   stopProxy as stopProxySession,
   getProxyStatus as getProxyStatusSession,
 } from '../session-tracker';
+import { ensureCliproxyService } from '../service-manager';
+import { CLIPROXY_DEFAULT_PORT } from '../config-generator';
 
 /** Proxy status result */
 export interface ProxyStatusResult {
@@ -27,6 +29,15 @@ export interface StopProxyResult {
   error?: string;
 }
 
+/** Start proxy result */
+export interface StartProxyResult {
+  started: boolean;
+  alreadyRunning: boolean;
+  port: number;
+  configRegenerated?: boolean;
+  error?: string;
+}
+
 /**
  * Get current proxy status
  */
@@ -41,6 +52,16 @@ export async function stopProxy(): Promise<StopProxyResult> {
   return stopProxySession();
 }
 
+/**
+ * Start CLIProxy service (or reuse existing running instance)
+ */
+export async function startProxy(
+  port: number = CLIPROXY_DEFAULT_PORT,
+  verbose: boolean = false
+): Promise<StartProxyResult> {
+  return ensureCliproxyService(port, verbose);
+}
+
 /**
  * Check if proxy is currently running
  */
diff --git a/src/commands/cliproxy/help-subcommand.ts b/src/commands/cliproxy/help-subcommand.ts
index fe136927..7971c701 100644
--- a/src/commands/cliproxy/help-subcommand.ts
+++ b/src/commands/cliproxy/help-subcommand.ts
@@ -61,6 +61,8 @@ export async function showHelp(): Promise<void> {
     [
       'Proxy Lifecycle:',
       [
+        ['start', 'Start CLIProxy instance in background'],
+        ['restart', 'Restart CLIProxy instance'],
         ['status', 'Show running CLIProxy status'],
         ['stop', 'Stop running CLIProxy instance'],
         ['doctor', 'Quota diagnostics and shared project detection'],
diff --git a/src/commands/cliproxy/index.ts b/src/commands/cliproxy/index.ts
index bdefb355..308f9838 100644
--- a/src/commands/cliproxy/index.ts
+++ b/src/commands/cliproxy/index.ts
@@ -20,7 +20,12 @@ import {
   handleResumeAccount,
 } from './quota-subcommand';
 import { handleCreate, handleRemove, handleEdit } from './variant-subcommand';
-import { handleProxyStatus, handleStop } from './proxy-lifecycle-subcommand';
+import {
+  handleProxyStatus,
+  handleStart,
+  handleStop,
+  handleRestart,
+} from './proxy-lifecycle-subcommand';
 import { showStatus, handleInstallVersion, handleInstallLatest } from './install-subcommand';
 import { showHelp } from './help-subcommand';
 import {
@@ -198,11 +203,21 @@ export async function handleCliproxyCommand(args: string[]): Promise<void> {
   }
 
   // Proxy lifecycle commands
+  if (command === 'start') {
+    await handleStart(verbose);
+    return;
+  }
+
   if (command === 'stop') {
     await handleStop();
     return;
   }
 
+  if (command === 'restart') {
+    await handleRestart(verbose);
+    return;
+  }
+
   if (command === 'status') {
     await handleProxyStatus();
     return;
diff --git a/src/commands/cliproxy/proxy-lifecycle-subcommand.ts b/src/commands/cliproxy/proxy-lifecycle-subcommand.ts
index d59319c2..c2983ecb 100644
--- a/src/commands/cliproxy/proxy-lifecycle-subcommand.ts
+++ b/src/commands/cliproxy/proxy-lifecycle-subcommand.ts
@@ -2,15 +2,68 @@
  * CLIProxy Lifecycle Management
  *
  * Handles:
+ * - ccs cliproxy start
+ * - ccs cliproxy restart
  * - ccs cliproxy status
  * - ccs cliproxy stop
  */
 
 import { initUI, header, color, dim, ok, warn, info } from '../../utils/ui';
-import { getProxyStatus, stopProxy } from '../../cliproxy/services';
+import { getProxyStatus, startProxy, stopProxy } from '../../cliproxy/services';
 import { detectRunningProxy } from '../../cliproxy/proxy-detector';
 import { CLIPROXY_DEFAULT_PORT } from '../../cliproxy/config-generator';
 
+export async function handleStart(verbose = false): Promise<void> {
+  await initUI();
+  console.log(header('Start CLIProxy'));
+  console.log('');
+
+  const result = await startProxy(CLIPROXY_DEFAULT_PORT, verbose);
+  if (result.started) {
+    if (result.alreadyRunning) {
+      console.log(info(`CLIProxy already running on port ${result.port}`));
+      if (result.configRegenerated) {
+        console.log(warn('Config updated - restart CLIProxy to apply changes'));
+      }
+    } else {
+      console.log(ok(`CLIProxy started on port ${result.port}`));
+    }
+    console.log(dim('To stop: ccs cliproxy stop'));
+  } else {
+    console.log(warn(result.error || 'Failed to start CLIProxy'));
+  }
+  console.log('');
+}
+
+export async function handleRestart(verbose = false): Promise<void> {
+  await initUI();
+  console.log(header('Restart CLIProxy'));
+  console.log('');
+
+  const stopResult = await stopProxy();
+  if (stopResult.stopped) {
+    console.log(ok(`CLIProxy stopped (PID ${stopResult.pid})`));
+  } else if (stopResult.error === 'No active CLIProxy session found') {
+    console.log(info('No active CLIProxy session found, starting a new instance'));
+  } else {
+    console.log(warn(stopResult.error || 'Failed to stop existing CLIProxy'));
+    console.log(info('Attempting to start a fresh instance...'));
+  }
+
+  const startResult = await startProxy(CLIPROXY_DEFAULT_PORT, verbose);
+  if (startResult.started) {
+    if (startResult.alreadyRunning) {
+      console.log(info(`CLIProxy already running on port ${startResult.port}`));
+    } else {
+      console.log(ok(`CLIProxy started on port ${startResult.port}`));
+    }
+  } else {
+    console.log(warn(startResult.error || 'Failed to restart CLIProxy'));
+  }
+
+  console.log('');
+}
+
 export async function handleProxyStatus(): Promise<void> {
   await initUI();
   console.log(header('CLIProxy Status'));
diff --git a/tests/unit/commands/cliproxy-command.test.js b/tests/unit/commands/cliproxy-command.test.js
index 2f7c2a97..e6fc3a0b 100644
--- a/tests/unit/commands/cliproxy-command.test.js
+++ b/tests/unit/commands/cliproxy-command.test.js
@@ -491,6 +491,18 @@ describe('CLIProxy Command - Proxy Lifecycle', () => {
   });
 
   describe('Command Routing', () => {
+    it('routes "start" subcommand correctly', () => {
+      const args = ['cliproxy', 'start'];
+      const subcommand = args[1];
+      assert.strictEqual(subcommand, 'start');
+    });
+
+    it('routes "restart" subcommand correctly', () => {
+      const args = ['cliproxy', 'restart'];
+      const subcommand = args[1];
+      assert.strictEqual(subcommand, 'restart');
+    });
+
     it('routes "stop" subcommand correctly', () => {
       const args = ['cliproxy', 'stop'];
       const subcommand = args[1];
@@ -504,7 +516,7 @@ describe('CLIProxy Command - Proxy Lifecycle', () => {
     });
 
     it('handles unknown subcommand', () => {
-      const validSubcommands = ['stop', 'status', 'create', 'list', 'remove'];
+      const validSubcommands = ['start', 'restart', 'stop', 'status', 'create', 'list', 'remove'];
       const unknownCommand = 'invalid';
       assert.strictEqual(validSubcommands.includes(unknownCommand), false);
     });