diff --git a/CHANGELOG.md b/CHANGELOG.md
index fc348674..a933c608 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,74 @@
 
 Format: [Keep a Changelog](https://keepachangelog.com/)
 
+## [5.0.0] - 2025-11-28
+
+### Added
+- **CLIProxy OAuth Profiles**: Three new zero-config profiles powered by CLIProxyAPI
+  - `ccs gemini` - Google Gemini via OAuth (zero config)
+  - `ccs chatgpt` - ChatGPT/OpenAI Codex via OAuth (zero config)
+  - `ccs qwen` - Alibaba Qwen via OAuth (zero config)
+
+- **Download-on-Demand Binary**: CLIProxyAPI binary (~15MB) downloads automatically on first use
+  - Supports 6 platforms: darwin/linux/windows × amd64/arm64
+  - SHA256 checksum verification
+  - 3x retry with exponential backoff
+  - No npm package size impact
+
+- **OAuth Authentication System** (`src/cliproxy/auth-handler.ts`):
+  - Browser-based OAuth flow with automatic token storage
+  - Headless mode fallback (`ccs gemini --auth --headless`)
+  - Token storage in `~/.ccs/cliproxy-auth/<provider>/`
+  - 2-minute OAuth timeout protection
+
+- **CLIProxy Diagnostics** in `ccs doctor`:
+  - Binary installation status + version
+  - Config file validation
+  - OAuth status per provider (gemini/chatgpt/qwen)
+  - Port 8317 availability check
+
+- **Enhanced Error Messages** (`src/utils/error-manager.ts`):
+  - OAuth timeout troubleshooting
+  - Port conflict resolution
+  - Binary download failure with manual URL
+
+- **New CLIProxy Module** (`src/cliproxy/`):
+  - `binary-manager.ts` - Download, verify, extract binary
+  - `platform-detector.ts` - OS/arch detection for 6 platforms
+  - `cliproxy-executor.ts` - Spawn/kill proxy pattern
+  - `config-generator.ts` - Generate config.yaml per provider
+  - `auth-handler.ts` - OAuth token management
+  - `types.ts` - TypeScript type definitions
+  - `index.ts` - Central exports
+
+### Changed
+- **Profile Detection**: New priority order
+  1. CLIProxy profiles (gemini, chatgpt, qwen)
+  2. Settings-based profiles (glm, glmt, kimi)
+  3. Account-based profiles (work, personal)
+  4. Default Claude CLI
+- **Help Text**: Updated with new OAuth profiles (alphabetically sorted)
+- **Profile Detector**: Added `cliproxy` profile type
+
+### Technical Details
+- **Binary Version**: CLIProxyAPI v6.5.27
+- **Default Port**: 8317 (TCP polling for readiness, no PROXY_READY signal)
+- **Model Mappings**:
+  - Gemini: gemini-2.0-flash (opus: thinking-exp, haiku: flash-lite)
+  - ChatGPT: gpt-4o (opus: o1, haiku: gpt-4o-mini)
+  - Qwen: qwen-max (sonnet: qwen-plus, haiku: qwen-turbo)
+- **Storage**:
+  - Binary: `~/.ccs/bin/cliproxyapi`
+  - Tokens: `~/.ccs/cliproxy-auth/<provider>/`
+  - Config: `~/.ccs/cliproxy.config.yaml`
+
+### Migration
+- **No breaking changes**: All existing profiles (glm, glmt, kimi, accounts) work unchanged
+- **Zero configuration**: OAuth profiles work out-of-box after browser login
+- **Backward compatible**: v4.x commands and workflows unchanged
+
+---
+
 ## [4.5.0] - 2025-11-27 (Phase 02 Complete)
 
 ### Changed
diff --git a/VERSION b/VERSION
index a84947d6..0062ac97 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.5.0
+5.0.0
diff --git a/installers/install.ps1 b/installers/install.ps1
index 5269b903..99437d13 100644
--- a/installers/install.ps1
+++ b/installers/install.ps1
@@ -83,7 +83,7 @@ $InstallMethod = if ($ScriptDir -and ((Test-Path "$ScriptDir\lib\ccs.ps1") -or (
 # IMPORTANT: Update this version when releasing new versions!
 # This hardcoded version is used for standalone installations (irm | iex)
 # For git installations, VERSION file is read if available
-$CcsVersion = "4.5.0"
+$CcsVersion = "5.0.0"
 
 # Try to read VERSION file for git installations
 if ($ScriptDir) {
diff --git a/installers/install.sh b/installers/install.sh
index 348fb381..44a0a336 100755
--- a/installers/install.sh
+++ b/installers/install.sh
@@ -84,7 +84,7 @@ fi
 # IMPORTANT: Update this version when releasing new versions!
 # This hardcoded version is used for standalone installations (curl | bash)
 # For git installations, VERSION file is read if available
-CCS_VERSION="4.5.0"
+CCS_VERSION="5.0.0"
 
 # Try to read VERSION file for git installations
 if [[ -f "$SCRIPT_DIR/VERSION" ]]; then
diff --git a/package.json b/package.json
index 0da342e4..90e44715 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@kaitranntt/ccs",
-  "version": "4.5.0",
+  "version": "5.0.0",
   "description": "Claude Code Switch - Instant profile switching between Claude Sonnet 4.5 and GLM 4.6",
   "keywords": [
     "cli",
diff --git a/src/auth/profile-detector.ts b/src/auth/profile-detector.ts
index 3108feba..6a577fc1 100644
--- a/src/auth/profile-detector.ts
+++ b/src/auth/profile-detector.ts
@@ -11,7 +11,11 @@ import * as os from 'os';
 import { findSimilarStrings } from '../utils/helpers';
 import { Config, Settings, ProfileMetadata } from '../types';
 
-export type ProfileType = 'settings' | 'account' | 'default';
+export type ProfileType = 'settings' | 'account' | 'cliproxy' | 'default';
+
+/** CLIProxy profile names (OAuth-based, zero config) */
+export const CLIPROXY_PROFILES = ['gemini', 'chatgpt', 'qwen'] as const;
+export type CLIProxyProfileName = (typeof CLIPROXY_PROFILES)[number];
 
 export interface ProfileDetectionResult {
   type: ProfileType;
@@ -88,6 +92,14 @@ class ProfileDetector {
       return this.resolveDefaultProfile();
     }
 
+    // Priority 0: Check CLIProxy profiles (gemini, chatgpt, qwen) - OAuth-based, zero config
+    if (CLIPROXY_PROFILES.includes(profileName as CLIProxyProfileName)) {
+      return {
+        type: 'cliproxy',
+        name: profileName,
+      };
+    }
+
     // Priority 1: Check settings-based profiles (glm, kimi) - BACKWARD COMPATIBILITY
     const config = this.readConfig();
 
@@ -162,6 +174,12 @@ class ProfileDetector {
   private listAvailableProfiles(): string {
     const lines: string[] = [];
 
+    // CLIProxy profiles (OAuth-based, always available)
+    lines.push('CLIProxy profiles (OAuth, zero config):');
+    CLIPROXY_PROFILES.forEach((name) => {
+      lines.push(`  - ${name}`);
+    });
+
     // Settings-based profiles
     const config = this.readConfig();
     const settingsProfiles = Object.keys(config.profiles || {});
@@ -185,13 +203,6 @@ class ProfileDetector {
       });
     }
 
-    if (lines.length === 0) {
-      return (
-        '  (no profiles configured)\n' +
-        '  Run "ccs auth save <profile>" to create your first account profile.'
-      );
-    }
-
     return lines.join('\n');
   }
 
@@ -210,13 +221,14 @@ class ProfileDetector {
   /**
    * Get all available profile names
    */
-  getAllProfiles(): AllProfiles {
+  getAllProfiles(): AllProfiles & { cliproxy: string[] } {
     const config = this.readConfig();
     const profiles = this.readProfiles();
 
     return {
       settings: Object.keys(config.profiles || {}),
       accounts: Object.keys(profiles.profiles || {}),
+      cliproxy: [...CLIPROXY_PROFILES],
       default: profiles.default,
     };
   }
diff --git a/src/ccs.ts b/src/ccs.ts
index 04bf9179..a92ac2f1 100644
--- a/src/ccs.ts
+++ b/src/ccs.ts
@@ -13,6 +13,7 @@ import * as fs from 'fs';
 import { detectClaudeCli } from './utils/claude-detector';
 import { getSettingsPath } from './utils/config-manager';
 import { ErrorManager } from './utils/error-manager';
+import { execClaudeWithCLIProxy, CLIProxyProvider } from './cliproxy';
 
 // Import extracted command handlers
 import { handleVersionCommand } from './commands/version-command';
@@ -293,7 +294,10 @@ async function main(): Promise<void> {
   try {
     const profileInfo = detector.detectProfileType(profile);
 
-    if (profileInfo.type === 'settings') {
+    if (profileInfo.type === 'cliproxy') {
+      // CLIPROXY FLOW: OAuth-based profiles (gemini, chatgpt, qwen)
+      await execClaudeWithCLIProxy(claudeCli, profileInfo.name as CLIProxyProvider, remainingArgs);
+    } else if (profileInfo.type === 'settings') {
       // Check if this is GLMT profile (requires proxy)
       if (profileInfo.name === 'glmt') {
         // GLMT FLOW: Settings-based with embedded proxy for thinking support
diff --git a/src/cliproxy/auth-handler.ts b/src/cliproxy/auth-handler.ts
new file mode 100644
index 00000000..c95ff167
--- /dev/null
+++ b/src/cliproxy/auth-handler.ts
@@ -0,0 +1,354 @@
+/**
+ * Auth Handler for CLIProxyAPI
+ *
+ * Manages OAuth authentication for CLIProxy providers (Gemini, ChatGPT, Qwen).
+ * CLIProxyAPI handles OAuth internally - we just need to:
+ * 1. Check if auth exists (token files in auth-dir)
+ * 2. Trigger OAuth flow by spawning binary with auth flag
+ * 3. Provide headless fallback (display URL for manual auth)
+ *
+ * Token storage: ~/.ccs/cliproxy-auth/<provider>/
+ */
+
+import * as fs from 'fs';
+import * as path from 'path';
+import { spawn } from 'child_process';
+import { ProgressIndicator } from '../utils/progress-indicator';
+import { getAuthDir } from './config-generator';
+import { ensureCLIProxyBinary } from './binary-manager';
+import { CLIProxyProvider } from './types';
+
+/**
+ * Auth status for a provider
+ */
+export interface AuthStatus {
+  /** Provider name */
+  provider: CLIProxyProvider;
+  /** Whether authentication exists */
+  authenticated: boolean;
+  /** Path to token directory */
+  tokenDir: string;
+  /** Token file paths found */
+  tokenFiles: string[];
+  /** When last authenticated (if known) */
+  lastAuth?: Date;
+}
+
+/**
+ * OAuth config for each provider
+ */
+interface ProviderOAuthConfig {
+  /** Provider identifier */
+  provider: CLIProxyProvider;
+  /** Display name */
+  displayName: string;
+  /** OAuth authorization URL (for manual flow) */
+  authUrl: string;
+  /** Scopes required */
+  scopes: string[];
+  /** CLI flag for auth */
+  authFlag: string;
+}
+
+/**
+ * OAuth configurations per provider
+ * Note: CLIProxyAPI handles actual OAuth - these are for display/manual flow
+ */
+const OAUTH_CONFIGS: Record<CLIProxyProvider, ProviderOAuthConfig> = {
+  gemini: {
+    provider: 'gemini',
+    displayName: 'Google Gemini',
+    authUrl: 'https://accounts.google.com/o/oauth2/v2/auth',
+    scopes: ['https://www.googleapis.com/auth/generative-language'],
+    authFlag: '--auth-gemini',
+  },
+  chatgpt: {
+    provider: 'chatgpt',
+    displayName: 'ChatGPT/OpenAI',
+    authUrl: 'https://auth.openai.com/authorize',
+    scopes: ['openid', 'profile'],
+    authFlag: '--auth-codex',
+  },
+  qwen: {
+    provider: 'qwen',
+    displayName: 'Alibaba Qwen',
+    authUrl: 'https://auth.aliyun.com/oauth2/authorize',
+    scopes: ['dashscope'],
+    authFlag: '--auth-qwen',
+  },
+};
+
+/**
+ * Get OAuth config for provider
+ */
+export function getOAuthConfig(provider: CLIProxyProvider): ProviderOAuthConfig {
+  const config = OAUTH_CONFIGS[provider];
+  if (!config) {
+    throw new Error(`Unknown provider: ${provider}`);
+  }
+  return config;
+}
+
+/**
+ * Get token directory for provider
+ */
+export function getProviderTokenDir(provider: CLIProxyProvider): string {
+  return path.join(getAuthDir(), provider);
+}
+
+/**
+ * Check if provider has valid authentication
+ */
+export function isAuthenticated(provider: CLIProxyProvider): boolean {
+  const tokenDir = getProviderTokenDir(provider);
+
+  if (!fs.existsSync(tokenDir)) {
+    return false;
+  }
+
+  // Check for any token files (CLIProxyAPI stores tokens with various names)
+  const files = fs.readdirSync(tokenDir);
+  const tokenFiles = files.filter(
+    (f) => f.endsWith('.json') || f.endsWith('.token') || f === 'credentials'
+  );
+
+  return tokenFiles.length > 0;
+}
+
+/**
+ * Get detailed auth status for provider
+ */
+export function getAuthStatus(provider: CLIProxyProvider): AuthStatus {
+  const tokenDir = getProviderTokenDir(provider);
+  let tokenFiles: string[] = [];
+  let lastAuth: Date | undefined;
+
+  if (fs.existsSync(tokenDir)) {
+    const files = fs.readdirSync(tokenDir);
+    tokenFiles = files.filter(
+      (f) => f.endsWith('.json') || f.endsWith('.token') || f === 'credentials'
+    );
+
+    // Get most recent modification time
+    for (const file of tokenFiles) {
+      const filePath = path.join(tokenDir, file);
+      const stats = fs.statSync(filePath);
+      if (!lastAuth || stats.mtime > lastAuth) {
+        lastAuth = stats.mtime;
+      }
+    }
+  }
+
+  return {
+    provider,
+    authenticated: tokenFiles.length > 0,
+    tokenDir,
+    tokenFiles,
+    lastAuth,
+  };
+}
+
+/**
+ * Get auth status for all providers
+ */
+export function getAllAuthStatus(): AuthStatus[] {
+  const providers: CLIProxyProvider[] = ['gemini', 'chatgpt', 'qwen'];
+  return providers.map(getAuthStatus);
+}
+
+/**
+ * Clear authentication for provider
+ */
+export function clearAuth(provider: CLIProxyProvider): boolean {
+  const tokenDir = getProviderTokenDir(provider);
+
+  if (!fs.existsSync(tokenDir)) {
+    return false;
+  }
+
+  // Remove all files in token directory
+  const files = fs.readdirSync(tokenDir);
+  for (const file of files) {
+    fs.unlinkSync(path.join(tokenDir, file));
+  }
+
+  // Remove directory
+  fs.rmdirSync(tokenDir);
+
+  return true;
+}
+
+/**
+ * Trigger OAuth flow for provider
+ * Opens browser for user authentication
+ */
+export async function triggerOAuth(
+  provider: CLIProxyProvider,
+  options: { verbose?: boolean; headless?: boolean } = {}
+): Promise<boolean> {
+  const oauthConfig = getOAuthConfig(provider);
+  const { verbose = false, headless = false } = options;
+
+  const log = (msg: string) => {
+    if (verbose) {
+      console.error(`[auth] ${msg}`);
+    }
+  };
+
+  // Ensure binary exists
+  let binaryPath: string;
+  try {
+    binaryPath = await ensureCLIProxyBinary(verbose);
+  } catch (error) {
+    console.error('[X] Failed to prepare CLIProxy binary');
+    throw error;
+  }
+
+  // Ensure auth directory exists
+  const tokenDir = getProviderTokenDir(provider);
+  fs.mkdirSync(tokenDir, { recursive: true, mode: 0o700 });
+
+  // Headless mode: display manual instructions
+  if (headless) {
+    console.log('');
+    console.log(`[i] Headless mode: Manual authentication required for ${oauthConfig.displayName}`);
+    console.log('');
+    console.log('Instructions:');
+    console.log(`  1. Run CLIProxyAPI binary with auth flag on a machine with browser:`);
+    console.log(`     ${binaryPath} ${oauthConfig.authFlag}`);
+    console.log('');
+    console.log(`  2. Complete OAuth in browser`);
+    console.log('');
+    console.log(`  3. Copy token files from CLIProxyAPI auth directory to:`);
+    console.log(`     ${tokenDir}`);
+    console.log('');
+    return false;
+  }
+
+  // Standard mode: spawn binary with auth flag
+  const spinner = new ProgressIndicator(`Authenticating with ${oauthConfig.displayName}`);
+  spinner.start();
+
+  console.log('');
+  console.log(`[i] Opening browser for ${oauthConfig.displayName} authentication...`);
+  console.log('[i] Complete the login in your browser.');
+  console.log('');
+
+  return new Promise<boolean>((resolve) => {
+    // Spawn CLIProxyAPI with auth flag
+    // Note: CLIProxyAPI handles the OAuth flow internally
+    const authProcess = spawn(binaryPath, [oauthConfig.authFlag], {
+      stdio: verbose ? 'inherit' : ['ignore', 'pipe', 'pipe'],
+      env: {
+        ...process.env,
+        // Set auth directory for CLIProxyAPI
+        CLI_PROXY_AUTH_DIR: tokenDir,
+      },
+    });
+
+    let stderrData = '';
+
+    if (!verbose) {
+      authProcess.stdout?.on('data', (data: Buffer) => {
+        log(`stdout: ${data.toString().trim()}`);
+      });
+
+      authProcess.stderr?.on('data', (data: Buffer) => {
+        stderrData += data.toString();
+        log(`stderr: ${data.toString().trim()}`);
+      });
+    }
+
+    // Timeout after 2 minutes
+    const timeout = setTimeout(() => {
+      spinner.fail('Authentication timeout');
+      authProcess.kill();
+      console.error('[X] OAuth timed out after 2 minutes');
+      console.error('');
+      console.error('Troubleshooting:');
+      console.error('  - Make sure a browser is available');
+      console.error('  - Try running with --verbose for details');
+      console.error(`  - For headless systems, use: ccs ${provider} --auth --headless`);
+      resolve(false);
+    }, 120000);
+
+    authProcess.on('exit', (code) => {
+      clearTimeout(timeout);
+
+      if (code === 0) {
+        spinner.succeed(`Authenticated with ${oauthConfig.displayName}`);
+
+        // Verify token was created
+        if (isAuthenticated(provider)) {
+          console.log('[OK] Authentication successful');
+          resolve(true);
+        } else {
+          spinner.fail('Authentication incomplete');
+          console.error('[X] Token not found after authentication');
+          console.error('    The OAuth flow may have been cancelled');
+          resolve(false);
+        }
+      } else {
+        spinner.fail('Authentication failed');
+        console.error(`[X] CLIProxyAPI auth exited with code ${code}`);
+        if (stderrData) {
+          console.error(`    ${stderrData.trim()}`);
+        }
+        resolve(false);
+      }
+    });
+
+    authProcess.on('error', (error) => {
+      clearTimeout(timeout);
+      spinner.fail('Authentication error');
+      console.error(`[X] Failed to start auth process: ${error.message}`);
+      resolve(false);
+    });
+  });
+}
+
+/**
+ * Ensure provider is authenticated
+ * Triggers OAuth flow if not authenticated
+ */
+export async function ensureAuth(
+  provider: CLIProxyProvider,
+  options: { verbose?: boolean; headless?: boolean } = {}
+): Promise<boolean> {
+  // Check if already authenticated
+  if (isAuthenticated(provider)) {
+    if (options.verbose) {
+      console.error(`[auth] ${provider} already authenticated`);
+    }
+    return true;
+  }
+
+  // Not authenticated - trigger OAuth
+  const oauthConfig = getOAuthConfig(provider);
+  console.log(`[i] ${oauthConfig.displayName} authentication required`);
+
+  return triggerOAuth(provider, options);
+}
+
+/**
+ * Display auth status for all providers
+ */
+export function displayAuthStatus(): void {
+  console.log('CLIProxy Authentication Status:');
+  console.log('');
+
+  const statuses = getAllAuthStatus();
+
+  for (const status of statuses) {
+    const oauthConfig = getOAuthConfig(status.provider);
+    const icon = status.authenticated ? '[OK]' : '[!]';
+    const authStatus = status.authenticated ? 'Authenticated' : 'Not authenticated';
+    const lastAuthStr = status.lastAuth ? ` (last: ${status.lastAuth.toLocaleDateString()})` : '';
+
+    console.log(`${icon} ${oauthConfig.displayName}: ${authStatus}${lastAuthStr}`);
+  }
+
+  console.log('');
+  console.log('To authenticate: ccs <provider> --auth');
+  console.log('To logout:       ccs <provider> --logout');
+}
diff --git a/src/cliproxy/binary-manager.ts b/src/cliproxy/binary-manager.ts
new file mode 100644
index 00000000..304da600
--- /dev/null
+++ b/src/cliproxy/binary-manager.ts
@@ -0,0 +1,642 @@
+/**
+ * Binary Manager for CLIProxyAPI
+ *
+ * Download-on-demand binary manager:
+ * - Downloads platform-specific binary from GitHub releases
+ * - Verifies SHA256 checksum
+ * - Extracts and caches binary locally
+ * - Supports retry logic with exponential backoff
+ *
+ * Pattern: Mirrors npm install behavior (fast check, download only when needed)
+ */
+
+import * as fs from 'fs';
+import * as path from 'path';
+import * as https from 'https';
+import * as http from 'http';
+import * as crypto from 'crypto';
+import * as zlib from 'zlib';
+import { getCcsDir } from '../utils/config-manager';
+import { ProgressIndicator } from '../utils/progress-indicator';
+import {
+  BinaryInfo,
+  BinaryManagerConfig,
+  ChecksumResult,
+  DownloadResult,
+  ProgressCallback,
+} from './types';
+import {
+  detectPlatform,
+  getDownloadUrl,
+  getChecksumsUrl,
+  getExecutableName,
+  CLIPROXY_VERSION,
+} from './platform-detector';
+
+/** Default configuration */
+const DEFAULT_CONFIG: BinaryManagerConfig = {
+  version: CLIPROXY_VERSION,
+  releaseUrl: 'https://github.com/router-for-me/CLIProxyAPI/releases/download',
+  binPath: path.join(getCcsDir(), 'bin'),
+  maxRetries: 3,
+  verbose: false,
+};
+
+/**
+ * Binary Manager class for CLIProxyAPI binary lifecycle
+ */
+export class BinaryManager {
+  private config: BinaryManagerConfig;
+  private verbose: boolean;
+
+  constructor(config: Partial<BinaryManagerConfig> = {}) {
+    this.config = { ...DEFAULT_CONFIG, ...config };
+    this.verbose = this.config.verbose;
+  }
+
+  /**
+   * Ensure binary is available (download if missing)
+   * @returns Path to executable binary
+   */
+  async ensureBinary(): Promise<string> {
+    const binaryPath = this.getBinaryPath();
+
+    // Check if binary already exists
+    if (fs.existsSync(binaryPath)) {
+      this.log(`Binary exists: ${binaryPath}`);
+      return binaryPath;
+    }
+
+    // Download, verify, extract
+    this.log('Binary not found, downloading...');
+    await this.downloadAndInstall();
+
+    return binaryPath;
+  }
+
+  /**
+   * Get full path to binary executable
+   */
+  getBinaryPath(): string {
+    const execName = getExecutableName();
+    return path.join(this.config.binPath, execName);
+  }
+
+  /**
+   * Check if binary exists
+   */
+  isBinaryInstalled(): boolean {
+    return fs.existsSync(this.getBinaryPath());
+  }
+
+  /**
+   * Get binary info if installed
+   */
+  async getBinaryInfo(): Promise<BinaryInfo | null> {
+    const binaryPath = this.getBinaryPath();
+    if (!fs.existsSync(binaryPath)) {
+      return null;
+    }
+
+    const platform = detectPlatform();
+    const checksum = await this.computeChecksum(binaryPath);
+
+    return {
+      path: binaryPath,
+      version: this.config.version,
+      platform,
+      checksum,
+    };
+  }
+
+  /**
+   * Download and install binary
+   */
+  private async downloadAndInstall(): Promise<void> {
+    const platform = detectPlatform();
+    const downloadUrl = getDownloadUrl(this.config.version);
+    const checksumsUrl = getChecksumsUrl(this.config.version);
+
+    // Ensure bin directory exists
+    fs.mkdirSync(this.config.binPath, { recursive: true });
+
+    // Download archive
+    const archivePath = path.join(this.config.binPath, `cliproxy-archive.${platform.extension}`);
+
+    const spinner = new ProgressIndicator(`Downloading CLIProxyAPI v${this.config.version}`);
+    spinner.start();
+
+    try {
+      // Download with retry
+      const result = await this.downloadWithRetry(downloadUrl, archivePath);
+      if (!result.success) {
+        spinner.fail('Download failed');
+        throw new Error(result.error || 'Download failed after retries');
+      }
+
+      spinner.succeed('Download complete');
+
+      // Verify checksum
+      const verifySpinner = new ProgressIndicator('Verifying checksum');
+      verifySpinner.start();
+
+      const checksumResult = await this.verifyChecksum(
+        archivePath,
+        platform.binaryName,
+        checksumsUrl
+      );
+
+      if (!checksumResult.valid) {
+        verifySpinner.fail('Checksum mismatch');
+        fs.unlinkSync(archivePath);
+        throw new Error(
+          `Checksum mismatch for ${platform.binaryName}\n` +
+            `Expected: ${checksumResult.expected}\n` +
+            `Actual:   ${checksumResult.actual}\n\n` +
+            `Manual download: ${downloadUrl}`
+        );
+      }
+
+      verifySpinner.succeed('Checksum verified');
+
+      // Extract archive
+      const extractSpinner = new ProgressIndicator('Extracting binary');
+      extractSpinner.start();
+
+      await this.extractArchive(archivePath, platform.extension);
+
+      extractSpinner.succeed('Extraction complete');
+
+      // Cleanup archive
+      fs.unlinkSync(archivePath);
+
+      // Make executable (Unix only)
+      const binaryPath = this.getBinaryPath();
+      if (platform.os !== 'windows' && fs.existsSync(binaryPath)) {
+        fs.chmodSync(binaryPath, 0o755);
+        this.log(`Set executable permissions: ${binaryPath}`);
+      }
+
+      console.log(`[OK] CLIProxyAPI v${this.config.version} installed successfully`);
+    } catch (error) {
+      spinner.fail('Installation failed');
+      throw error;
+    }
+  }
+
+  /**
+   * Download file with retry logic and exponential backoff
+   */
+  private async downloadWithRetry(url: string, destPath: string): Promise<DownloadResult> {
+    let lastError = '';
+    let retries = 0;
+
+    while (retries < this.config.maxRetries) {
+      try {
+        await this.downloadFile(url, destPath);
+        return { success: true, filePath: destPath, retries };
+      } catch (error) {
+        const err = error as Error;
+        lastError = err.message;
+        retries++;
+
+        if (retries < this.config.maxRetries) {
+          // Exponential backoff: 1s, 2s, 4s
+          const delay = Math.pow(2, retries - 1) * 1000;
+          this.log(`Retry ${retries}/${this.config.maxRetries} after ${delay}ms: ${lastError}`);
+          await this.sleep(delay);
+        }
+      }
+    }
+
+    return {
+      success: false,
+      error: `Download failed after ${retries} attempts: ${lastError}`,
+      retries,
+    };
+  }
+
+  /**
+   * Download file from URL with progress tracking
+   */
+  private downloadFile(
+    url: string,
+    destPath: string,
+    onProgress?: ProgressCallback
+  ): Promise<void> {
+    return new Promise((resolve, reject) => {
+      const handleResponse = (res: http.IncomingMessage) => {
+        // Handle redirects (GitHub releases use 302)
+        if (res.statusCode === 301 || res.statusCode === 302) {
+          const redirectUrl = res.headers.location;
+          if (!redirectUrl) {
+            reject(new Error('Redirect without location header'));
+            return;
+          }
+          this.log(`Following redirect: ${redirectUrl}`);
+          this.downloadFile(redirectUrl, destPath, onProgress).then(resolve).catch(reject);
+          return;
+        }
+
+        if (res.statusCode !== 200) {
+          reject(new Error(`HTTP ${res.statusCode}: ${res.statusMessage}`));
+          return;
+        }
+
+        const totalBytes = parseInt(res.headers['content-length'] || '0', 10);
+        let downloadedBytes = 0;
+
+        const fileStream = fs.createWriteStream(destPath);
+
+        res.on('data', (chunk: Buffer) => {
+          downloadedBytes += chunk.length;
+          if (onProgress && totalBytes > 0) {
+            onProgress({
+              total: totalBytes,
+              downloaded: downloadedBytes,
+              percentage: Math.round((downloadedBytes / totalBytes) * 100),
+            });
+          }
+        });
+
+        res.pipe(fileStream);
+
+        fileStream.on('finish', () => {
+          fileStream.close();
+          resolve();
+        });
+
+        fileStream.on('error', (err) => {
+          fs.unlink(destPath, () => {}); // Cleanup partial file
+          reject(err);
+        });
+
+        res.on('error', (err) => {
+          fs.unlink(destPath, () => {});
+          reject(err);
+        });
+      };
+
+      const protocol = url.startsWith('https') ? https : http;
+      const req = protocol.get(url, handleResponse);
+
+      req.on('error', reject);
+      req.setTimeout(60000, () => {
+        req.destroy();
+        reject(new Error('Download timeout (60s)'));
+      });
+    });
+  }
+
+  /**
+   * Verify file checksum against checksums.txt
+   */
+  private async verifyChecksum(
+    filePath: string,
+    binaryName: string,
+    checksumsUrl: string
+  ): Promise<ChecksumResult> {
+    // Download checksums.txt
+    const checksumsContent = await this.fetchText(checksumsUrl);
+
+    // Parse expected checksum
+    const expectedHash = this.parseChecksum(checksumsContent, binaryName);
+    if (!expectedHash) {
+      throw new Error(`Checksum not found for ${binaryName} in checksums.txt`);
+    }
+
+    // Compute actual checksum
+    const actualHash = await this.computeChecksum(filePath);
+
+    return {
+      valid: actualHash === expectedHash,
+      expected: expectedHash,
+      actual: actualHash,
+    };
+  }
+
+  /**
+   * Parse checksum from checksums.txt content
+   */
+  private parseChecksum(content: string, binaryName: string): string | null {
+    const lines = content.split('\n');
+    for (const line of lines) {
+      // Format: "hash  filename" or "hash filename"
+      const parts = line.trim().split(/\s+/);
+      if (parts.length >= 2 && parts[1] === binaryName) {
+        return parts[0].toLowerCase();
+      }
+    }
+    return null;
+  }
+
+  /**
+   * Compute SHA256 checksum of file
+   */
+  private computeChecksum(filePath: string): Promise<string> {
+    return new Promise((resolve, reject) => {
+      const hash = crypto.createHash('sha256');
+      const stream = fs.createReadStream(filePath);
+
+      stream.on('data', (data) => hash.update(data));
+      stream.on('end', () => resolve(hash.digest('hex')));
+      stream.on('error', reject);
+    });
+  }
+
+  /**
+   * Fetch text content from URL
+   */
+  private fetchText(url: string): Promise<string> {
+    return new Promise((resolve, reject) => {
+      const handleResponse = (res: http.IncomingMessage) => {
+        // Handle redirects
+        if (res.statusCode === 301 || res.statusCode === 302) {
+          const redirectUrl = res.headers.location;
+          if (!redirectUrl) {
+            reject(new Error('Redirect without location header'));
+            return;
+          }
+          this.fetchText(redirectUrl).then(resolve).catch(reject);
+          return;
+        }
+
+        if (res.statusCode !== 200) {
+          reject(new Error(`HTTP ${res.statusCode}: ${res.statusMessage}`));
+          return;
+        }
+
+        let data = '';
+        res.on('data', (chunk) => (data += chunk));
+        res.on('end', () => resolve(data));
+        res.on('error', reject);
+      };
+
+      const protocol = url.startsWith('https') ? https : http;
+      const req = protocol.get(url, handleResponse);
+      req.on('error', reject);
+      req.setTimeout(30000, () => {
+        req.destroy();
+        reject(new Error('Request timeout (30s)'));
+      });
+    });
+  }
+
+  /**
+   * Extract archive (tar.gz or zip)
+   */
+  private async extractArchive(archivePath: string, extension: 'tar.gz' | 'zip'): Promise<void> {
+    if (extension === 'tar.gz') {
+      await this.extractTarGz(archivePath);
+    } else {
+      await this.extractZip(archivePath);
+    }
+  }
+
+  /**
+   * Extract tar.gz archive using Node.js built-in modules
+   */
+  private extractTarGz(archivePath: string): Promise<void> {
+    return new Promise((resolve, reject) => {
+      const destDir = this.config.binPath;
+      const execName = getExecutableName();
+
+      // Read and decompress
+      const gunzip = zlib.createGunzip();
+      const input = fs.createReadStream(archivePath);
+
+      let headerBuffer = Buffer.alloc(0);
+      let currentFile: { name: string; size: number } | null = null;
+      let bytesRead = 0;
+      let fileBuffer = Buffer.alloc(0);
+
+      const processData = (data: Buffer) => {
+        headerBuffer = Buffer.concat([headerBuffer, data]);
+
+        while (headerBuffer.length >= 512) {
+          if (!currentFile) {
+            // Parse tar header
+            const header = headerBuffer.subarray(0, 512);
+            headerBuffer = headerBuffer.subarray(512);
+
+            // Check for empty header (end of archive)
+            if (header.every((b) => b === 0)) {
+              return;
+            }
+
+            // Extract filename (bytes 0-99)
+            let name = '';
+            for (let i = 0; i < 100 && header[i] !== 0; i++) {
+              name += String.fromCharCode(header[i]);
+            }
+
+            // Extract size (bytes 124-135, octal)
+            let sizeStr = '';
+            for (let i = 124; i < 136 && header[i] !== 0; i++) {
+              sizeStr += String.fromCharCode(header[i]);
+            }
+            const size = parseInt(sizeStr.trim(), 8) || 0;
+
+            if (name && size > 0) {
+              // Extract just the filename (handle directories)
+              const baseName = path.basename(name);
+              if (baseName === execName || baseName === 'CLIProxyAPI') {
+                currentFile = { name: baseName, size };
+                fileBuffer = Buffer.alloc(0);
+                bytesRead = 0;
+              } else {
+                // Skip this file's data
+                const paddedSize = Math.ceil(size / 512) * 512;
+                if (headerBuffer.length >= paddedSize) {
+                  headerBuffer = headerBuffer.subarray(paddedSize);
+                } else {
+                  // Need to skip data in chunks
+                  currentFile = { name: '', size: paddedSize };
+                  bytesRead = 0;
+                }
+              }
+            }
+          } else {
+            // Read file data
+            const remaining = currentFile.size - bytesRead;
+            const chunk = headerBuffer.subarray(0, Math.min(remaining, headerBuffer.length));
+            headerBuffer = headerBuffer.subarray(chunk.length);
+
+            if (currentFile.name) {
+              fileBuffer = Buffer.concat([fileBuffer, chunk]);
+            }
+            bytesRead += chunk.length;
+
+            if (bytesRead >= currentFile.size) {
+              // File complete
+              if (currentFile.name) {
+                const destPath = path.join(destDir, execName);
+                fs.writeFileSync(destPath, fileBuffer);
+                this.log(`Extracted: ${currentFile.name} -> ${destPath}`);
+              }
+
+              // Skip padding to 512-byte boundary
+              const paddedSize = Math.ceil(currentFile.size / 512) * 512;
+              const padding = paddedSize - currentFile.size;
+              if (headerBuffer.length >= padding) {
+                headerBuffer = headerBuffer.subarray(padding);
+              }
+
+              currentFile = null;
+              fileBuffer = Buffer.alloc(0);
+            }
+          }
+        }
+      };
+
+      input.pipe(gunzip);
+      gunzip.on('data', processData);
+      gunzip.on('end', resolve);
+      gunzip.on('error', reject);
+      input.on('error', reject);
+    });
+  }
+
+  /**
+   * Extract zip archive using Node.js (simple implementation)
+   */
+  private extractZip(archivePath: string): Promise<void> {
+    return new Promise((resolve, reject) => {
+      const destDir = this.config.binPath;
+      const execName = getExecutableName();
+      const buffer = fs.readFileSync(archivePath);
+
+      // Find End of Central Directory record (EOCD)
+      let eocdOffset = buffer.length - 22;
+      while (eocdOffset >= 0) {
+        if (buffer.readUInt32LE(eocdOffset) === 0x06054b50) {
+          break;
+        }
+        eocdOffset--;
+      }
+
+      if (eocdOffset < 0) {
+        reject(new Error('Invalid ZIP file: EOCD not found'));
+        return;
+      }
+
+      const centralDirOffset = buffer.readUInt32LE(eocdOffset + 16);
+      let offset = centralDirOffset;
+
+      // Parse central directory
+      while (offset < eocdOffset) {
+        const sig = buffer.readUInt32LE(offset);
+        if (sig !== 0x02014b50) break;
+
+        const compressionMethod = buffer.readUInt16LE(offset + 10);
+        const compressedSize = buffer.readUInt32LE(offset + 20);
+        const uncompressedSize = buffer.readUInt32LE(offset + 24);
+        const fileNameLength = buffer.readUInt16LE(offset + 28);
+        const extraFieldLength = buffer.readUInt16LE(offset + 30);
+        const commentLength = buffer.readUInt16LE(offset + 32);
+        const localHeaderOffset = buffer.readUInt32LE(offset + 42);
+
+        const fileName = buffer.toString('utf8', offset + 46, offset + 46 + fileNameLength);
+        const baseName = path.basename(fileName);
+
+        // Check if this is the executable we want
+        if (baseName === execName || baseName === 'CLIProxyAPI.exe') {
+          // Read from local file header
+          const localOffset = localHeaderOffset;
+          const localSig = buffer.readUInt32LE(localOffset);
+
+          if (localSig !== 0x04034b50) {
+            reject(new Error('Invalid local file header'));
+            return;
+          }
+
+          const localFileNameLength = buffer.readUInt16LE(localOffset + 26);
+          const localExtraLength = buffer.readUInt16LE(localOffset + 28);
+          const dataOffset = localOffset + 30 + localFileNameLength + localExtraLength;
+
+          let fileData: Buffer;
+          if (compressionMethod === 0) {
+            // Stored (no compression)
+            fileData = buffer.subarray(dataOffset, dataOffset + compressedSize);
+          } else if (compressionMethod === 8) {
+            // Deflate
+            const compressed = buffer.subarray(dataOffset, dataOffset + compressedSize);
+            fileData = zlib.inflateRawSync(compressed);
+          } else {
+            reject(new Error(`Unsupported compression method: ${compressionMethod}`));
+            return;
+          }
+
+          if (fileData.length !== uncompressedSize) {
+            reject(new Error('Decompression size mismatch'));
+            return;
+          }
+
+          const destPath = path.join(destDir, execName);
+          fs.writeFileSync(destPath, fileData);
+          this.log(`Extracted: ${fileName} -> ${destPath}`);
+          resolve();
+          return;
+        }
+
+        offset += 46 + fileNameLength + extraFieldLength + commentLength;
+      }
+
+      reject(new Error(`Executable not found in archive: ${execName}`));
+    });
+  }
+
+  /**
+   * Delete binary (for cleanup or reinstall)
+   */
+  deleteBinary(): void {
+    const binaryPath = this.getBinaryPath();
+    if (fs.existsSync(binaryPath)) {
+      fs.unlinkSync(binaryPath);
+      this.log(`Deleted: ${binaryPath}`);
+    }
+  }
+
+  /**
+   * Sleep helper
+   */
+  private sleep(ms: number): Promise<void> {
+    return new Promise((resolve) => setTimeout(resolve, ms));
+  }
+
+  /**
+   * Log message if verbose
+   */
+  private log(message: string): void {
+    if (this.verbose) {
+      console.error(`[cliproxy] ${message}`);
+    }
+  }
+}
+
+/**
+ * Convenience function to ensure binary is available
+ * @returns Path to CLIProxyAPI executable
+ */
+export async function ensureCLIProxyBinary(verbose = false): Promise<string> {
+  const manager = new BinaryManager({ verbose });
+  return manager.ensureBinary();
+}
+
+/**
+ * Check if CLIProxyAPI binary is installed
+ */
+export function isCLIProxyInstalled(): boolean {
+  const manager = new BinaryManager();
+  return manager.isBinaryInstalled();
+}
+
+/**
+ * Get CLIProxyAPI binary path (may not exist)
+ */
+export function getCLIProxyPath(): string {
+  const manager = new BinaryManager();
+  return manager.getBinaryPath();
+}
+
+export default BinaryManager;
diff --git a/src/cliproxy/cliproxy-executor.ts b/src/cliproxy/cliproxy-executor.ts
new file mode 100644
index 00000000..afa95907
--- /dev/null
+++ b/src/cliproxy/cliproxy-executor.ts
@@ -0,0 +1,294 @@
+/**
+ * CLIProxy Executor - Spawn/Kill Pattern for CLIProxyAPI
+ *
+ * Mirrors GLMT architecture:
+ * 1. Ensure binary exists (Phase 1)
+ * 2. Generate config for provider
+ * 3. Spawn CLIProxyAPI binary
+ * 4. Poll port for readiness (no stdout signal)
+ * 5. Execute Claude CLI with proxied environment
+ * 6. Kill proxy on Claude exit
+ *
+ * Key difference from GLMT: Uses TCP port polling instead of PROXY_READY signal
+ */
+
+import { spawn, ChildProcess } from 'child_process';
+import * as net from 'net';
+import { ProgressIndicator } from '../utils/progress-indicator';
+import { escapeShellArg } from '../utils/shell-executor';
+import { ensureCLIProxyBinary } from './binary-manager';
+import {
+  generateConfig,
+  getClaudeEnvVars,
+  getProviderConfig,
+  CLIPROXY_DEFAULT_PORT,
+} from './config-generator';
+import { ensureAuth, isAuthenticated } from './auth-handler';
+import { CLIProxyProvider, ExecutorConfig } from './types';
+
+/** Default executor configuration */
+const DEFAULT_CONFIG: ExecutorConfig = {
+  port: CLIPROXY_DEFAULT_PORT,
+  timeout: 5000,
+  verbose: false,
+  pollInterval: 100,
+};
+
+/**
+ * Wait for TCP port to become available
+ * Uses polling since CLIProxyAPI doesn't emit PROXY_READY signal
+ */
+async function waitForProxyReady(
+  port: number,
+  timeout: number = 5000,
+  pollInterval: number = 100
+): Promise<void> {
+  const start = Date.now();
+
+  while (Date.now() - start < timeout) {
+    try {
+      await new Promise<void>((resolve, reject) => {
+        const socket = net.createConnection({ port, host: '127.0.0.1' }, () => {
+          socket.destroy();
+          resolve();
+        });
+
+        socket.on('error', (err) => {
+          socket.destroy();
+          reject(err);
+        });
+
+        // Individual connection timeout
+        socket.setTimeout(1000, () => {
+          socket.destroy();
+          reject(new Error('Connection timeout'));
+        });
+      });
+
+      return; // Connection successful - proxy is ready
+    } catch {
+      // Connection failed, wait and retry
+      await new Promise((r) => setTimeout(r, pollInterval));
+    }
+  }
+
+  throw new Error(`CLIProxy not ready after ${timeout}ms on port ${port}`);
+}
+
+/**
+ * Execute Claude CLI with CLIProxy (main entry point)
+ *
+ * @param claudeCli Path to Claude CLI executable
+ * @param provider CLIProxy provider (gemini, chatgpt, qwen)
+ * @param args Arguments to pass to Claude CLI
+ * @param config Optional executor configuration
+ */
+export async function execClaudeWithCLIProxy(
+  claudeCli: string,
+  provider: CLIProxyProvider,
+  args: string[],
+  config: Partial<ExecutorConfig> = {}
+): Promise<void> {
+  const cfg = { ...DEFAULT_CONFIG, ...config };
+  const verbose = cfg.verbose || args.includes('--verbose') || args.includes('-v');
+
+  const log = (msg: string) => {
+    if (verbose) {
+      console.error(`[cliproxy] ${msg}`);
+    }
+  };
+
+  // Validate provider
+  const providerConfig = getProviderConfig(provider);
+  log(`Provider: ${providerConfig.displayName}`);
+
+  // 1. Ensure binary exists (downloads if needed)
+  const spinner = new ProgressIndicator('Preparing CLIProxy');
+  spinner.start();
+
+  let binaryPath: string;
+  try {
+    binaryPath = await ensureCLIProxyBinary(verbose);
+    spinner.succeed('CLIProxy binary ready');
+  } catch (error) {
+    spinner.fail('Failed to prepare CLIProxy');
+    throw error;
+  }
+
+  // 2. Ensure OAuth completed (if provider requires it)
+  if (providerConfig.requiresOAuth) {
+    log(`Checking authentication for ${provider}`);
+
+    // Check for --auth flag to force re-auth
+    const forceAuth = args.includes('--auth');
+    const headless = args.includes('--headless');
+
+    if (forceAuth || !isAuthenticated(provider)) {
+      const authSuccess = await ensureAuth(provider, { verbose, headless });
+      if (!authSuccess) {
+        throw new Error(`Authentication required for ${providerConfig.displayName}`);
+      }
+    } else {
+      log(`${provider} already authenticated`);
+    }
+  }
+
+  // 3. Generate config file
+  log(`Generating config for ${provider}`);
+  const configPath = generateConfig(provider, cfg.port);
+  log(`Config written: ${configPath}`);
+
+  // 4. Spawn CLIProxyAPI binary
+  const proxyArgs = ['--config', configPath];
+
+  log(`Spawning: ${binaryPath} ${proxyArgs.join(' ')}`);
+
+  const proxy = spawn(binaryPath, proxyArgs, {
+    stdio: ['ignore', verbose ? 'pipe' : 'ignore', verbose ? 'pipe' : 'ignore'],
+    detached: false,
+  });
+
+  // Forward proxy output in verbose mode
+  if (verbose) {
+    proxy.stdout?.on('data', (data: Buffer) => {
+      process.stderr.write(`[cliproxy-out] ${data.toString()}`);
+    });
+    proxy.stderr?.on('data', (data: Buffer) => {
+      process.stderr.write(`[cliproxy-err] ${data.toString()}`);
+    });
+  }
+
+  // Handle proxy errors
+  proxy.on('error', (error) => {
+    console.error(`[X] CLIProxy spawn error: ${error.message}`);
+  });
+
+  // 5. Wait for proxy readiness via TCP polling
+  const readySpinner = new ProgressIndicator(`Waiting for CLIProxy on port ${cfg.port}`);
+  readySpinner.start();
+
+  try {
+    await waitForProxyReady(cfg.port, cfg.timeout, cfg.pollInterval);
+    readySpinner.succeed(`CLIProxy ready on port ${cfg.port}`);
+  } catch (error) {
+    readySpinner.fail('CLIProxy startup failed');
+    proxy.kill('SIGTERM');
+
+    const err = error as Error;
+    console.error('');
+    console.error('[X] CLIProxy failed to start');
+    console.error('');
+    console.error('Possible causes:');
+    console.error(`  1. Port ${cfg.port} already in use`);
+    console.error('  2. Binary crashed on startup');
+    console.error('  3. Invalid configuration');
+    console.error('');
+    console.error('Troubleshooting:');
+    console.error(`  - Check if port ${cfg.port} is in use: lsof -i :${cfg.port}`);
+    console.error('  - Run with --verbose for detailed logs');
+    console.error(`  - Check config: cat ${configPath}`);
+    console.error('');
+
+    throw new Error(`CLIProxy startup failed: ${err.message}`);
+  }
+
+  // 6. Execute Claude CLI with proxied environment
+  const envVars = getClaudeEnvVars(provider, cfg.port);
+  const env = { ...process.env, ...envVars };
+
+  log(`Claude env: ANTHROPIC_BASE_URL=${envVars.ANTHROPIC_BASE_URL}`);
+  log(`Claude env: ANTHROPIC_MODEL=${envVars.ANTHROPIC_MODEL}`);
+
+  const isWindows = process.platform === 'win32';
+  const needsShell = isWindows && /\.(cmd|bat|ps1)$/i.test(claudeCli);
+
+  let claude: ChildProcess;
+  if (needsShell) {
+    const cmdString = [claudeCli, ...args].map(escapeShellArg).join(' ');
+    claude = spawn(cmdString, {
+      stdio: 'inherit',
+      windowsHide: true,
+      shell: true,
+      env,
+    });
+  } else {
+    claude = spawn(claudeCli, args, {
+      stdio: 'inherit',
+      windowsHide: true,
+      env,
+    });
+  }
+
+  // 7. Cleanup: kill proxy when Claude exits
+  claude.on('exit', (code, signal) => {
+    log(`Claude exited: code=${code}, signal=${signal}`);
+    proxy.kill('SIGTERM');
+
+    if (signal) {
+      process.kill(process.pid, signal as NodeJS.Signals);
+    } else {
+      process.exit(code || 0);
+    }
+  });
+
+  claude.on('error', (error) => {
+    console.error('[X] Claude CLI error:', error);
+    proxy.kill('SIGTERM');
+    process.exit(1);
+  });
+
+  // Handle parent process termination (SIGTERM, SIGINT)
+  const cleanup = () => {
+    log('Parent signal received, cleaning up');
+    proxy.kill('SIGTERM');
+    claude.kill('SIGTERM');
+  };
+
+  process.once('SIGTERM', cleanup);
+  process.once('SIGINT', cleanup);
+
+  // Handle proxy crash
+  proxy.on('exit', (code, signal) => {
+    if (code !== 0 && code !== null) {
+      log(`Proxy exited unexpectedly: code=${code}, signal=${signal}`);
+      // Don't kill Claude - it may have already exited
+    }
+  });
+}
+
+/**
+ * Check if a port is available
+ */
+export async function isPortAvailable(port: number): Promise<boolean> {
+  return new Promise((resolve) => {
+    const server = net.createServer();
+
+    server.once('error', () => {
+      resolve(false);
+    });
+
+    server.once('listening', () => {
+      server.close();
+      resolve(true);
+    });
+
+    server.listen(port, '127.0.0.1');
+  });
+}
+
+/**
+ * Find an available port in range
+ */
+export async function findAvailablePort(
+  startPort: number = CLIPROXY_DEFAULT_PORT,
+  range: number = 10
+): Promise<number> {
+  for (let port = startPort; port < startPort + range; port++) {
+    if (await isPortAvailable(port)) {
+      return port;
+    }
+  }
+  throw new Error(`No available port found in range ${startPort}-${startPort + range - 1}`);
+}
+
+export default execClaudeWithCLIProxy;
diff --git a/src/cliproxy/config-generator.ts b/src/cliproxy/config-generator.ts
new file mode 100644
index 00000000..85907846
--- /dev/null
+++ b/src/cliproxy/config-generator.ts
@@ -0,0 +1,208 @@
+/**
+ * Config Generator for CLIProxyAPI
+ *
+ * Generates config.yaml for CLIProxyAPI based on provider.
+ * Handles OAuth token paths and provider-specific settings.
+ */
+
+import * as fs from 'fs';
+import * as path from 'path';
+import { getCcsDir } from '../utils/config-manager';
+import { CLIProxyProvider, ProviderConfig, ProviderModelMapping } from './types';
+
+/** Default CLIProxy port */
+export const CLIPROXY_DEFAULT_PORT = 8317;
+
+/** Internal API key for CCS-managed requests */
+const CCS_INTERNAL_API_KEY = 'ccs-internal-managed';
+
+/**
+ * Provider configurations with model mappings
+ */
+export const PROVIDER_CONFIGS: Record<CLIProxyProvider, ProviderConfig> = {
+  gemini: {
+    name: 'gemini',
+    displayName: 'Gemini',
+    models: {
+      defaultModel: 'gemini-2.0-flash',
+      claudeModel: 'gemini-2.0-flash',
+      opusModel: 'gemini-2.0-flash-thinking-exp',
+      sonnetModel: 'gemini-2.0-flash',
+      haikuModel: 'gemini-2.0-flash-lite',
+    },
+    requiresOAuth: true,
+  },
+  chatgpt: {
+    name: 'chatgpt',
+    displayName: 'ChatGPT',
+    models: {
+      defaultModel: 'gpt-4o',
+      claudeModel: 'gpt-4o',
+      opusModel: 'o1',
+      sonnetModel: 'gpt-4o',
+      haikuModel: 'gpt-4o-mini',
+    },
+    requiresOAuth: true,
+  },
+  qwen: {
+    name: 'qwen',
+    displayName: 'Qwen',
+    models: {
+      defaultModel: 'qwen-max',
+      claudeModel: 'qwen-max',
+      opusModel: 'qwen-max',
+      sonnetModel: 'qwen-plus',
+      haikuModel: 'qwen-turbo',
+    },
+    requiresOAuth: true,
+  },
+};
+
+/**
+ * Get provider configuration
+ */
+export function getProviderConfig(provider: CLIProxyProvider): ProviderConfig {
+  const config = PROVIDER_CONFIGS[provider];
+  if (!config) {
+    throw new Error(`Unknown provider: ${provider}`);
+  }
+  return config;
+}
+
+/**
+ * Get model mapping for provider
+ */
+export function getModelMapping(provider: CLIProxyProvider): ProviderModelMapping {
+  return getProviderConfig(provider).models;
+}
+
+/**
+ * Get auth directory for CLIProxyAPI
+ */
+export function getAuthDir(): string {
+  return path.join(getCcsDir(), 'cliproxy-auth');
+}
+
+/**
+ * Get config file path
+ */
+export function getConfigPath(): string {
+  return path.join(getCcsDir(), 'cliproxy.config.yaml');
+}
+
+/**
+ * Generate config.yaml content for provider
+ */
+function generateConfigContent(
+  provider: CLIProxyProvider,
+  port: number = CLIPROXY_DEFAULT_PORT
+): string {
+  const authDir = getAuthDir();
+
+  // Base config (always present)
+  let config = `# CLIProxyAPI config generated by CCS
+# Provider: ${provider}
+# Generated: ${new Date().toISOString()}
+
+port: ${port}
+debug: false
+logging-to-file: false
+usage-statistics-enabled: false
+
+# CCS internal authentication
+api-keys:
+  - "${CCS_INTERNAL_API_KEY}"
+
+# OAuth tokens stored here
+auth-dir: "${authDir}"
+`;
+
+  // Provider-specific config
+  switch (provider) {
+    case 'gemini':
+      config += `
+# Gemini configuration (OAuth-managed)
+# API keys will be loaded from auth-dir after OAuth
+gemini-api-key: []
+`;
+      break;
+
+    case 'chatgpt':
+      config += `
+# ChatGPT/Codex configuration (OAuth-managed)
+# API keys will be loaded from auth-dir after OAuth
+codex-api-key: []
+`;
+      break;
+
+    case 'qwen':
+      config += `
+# Qwen configuration (API key required)
+openai-compatibility:
+  - name: "qwen"
+    base-url: "https://dashscope.aliyuncs.com/compatible-mode/v1"
+    api-key-entries: []
+`;
+      break;
+  }
+
+  return config;
+}
+
+/**
+ * Generate config.yaml file for provider
+ * @returns Path to generated config file
+ */
+export function generateConfig(
+  provider: CLIProxyProvider,
+  port: number = CLIPROXY_DEFAULT_PORT
+): string {
+  const configPath = getConfigPath();
+  const configContent = generateConfigContent(provider, port);
+
+  // Ensure directories exist
+  const authDir = getAuthDir();
+  fs.mkdirSync(path.dirname(configPath), { recursive: true });
+  fs.mkdirSync(authDir, { recursive: true });
+
+  // Write config with secure permissions (0600)
+  fs.writeFileSync(configPath, configContent, { mode: 0o600 });
+
+  return configPath;
+}
+
+/**
+ * Check if config exists for provider
+ */
+export function configExists(): boolean {
+  return fs.existsSync(getConfigPath());
+}
+
+/**
+ * Delete config file
+ */
+export function deleteConfig(): void {
+  const configPath = getConfigPath();
+  if (fs.existsSync(configPath)) {
+    fs.unlinkSync(configPath);
+  }
+}
+
+/**
+ * Get environment variables for Claude CLI
+ */
+export function getClaudeEnvVars(
+  provider: CLIProxyProvider,
+  port: number = CLIPROXY_DEFAULT_PORT
+): NodeJS.ProcessEnv {
+  const models = getModelMapping(provider);
+
+  return {
+    ANTHROPIC_BASE_URL: `http://127.0.0.1:${port}`,
+    ANTHROPIC_AUTH_TOKEN: CCS_INTERNAL_API_KEY,
+    ANTHROPIC_MODEL: models.claudeModel,
+    ANTHROPIC_DEFAULT_OPUS_MODEL: models.opusModel || models.claudeModel,
+    ANTHROPIC_DEFAULT_SONNET_MODEL: models.sonnetModel || models.claudeModel,
+    ANTHROPIC_DEFAULT_HAIKU_MODEL: models.haikuModel || models.claudeModel,
+  };
+}
diff --git a/src/cliproxy/index.ts b/src/cliproxy/index.ts
new file mode 100644
index 00000000..7531e49e
--- /dev/null
+++ b/src/cliproxy/index.ts
@@ -0,0 +1,73 @@
+/**
+ * CLIProxy Module Exports
+ * Central export point for CLIProxyAPI binary management and execution
+ */
+
+// Types
+export type {
+  PlatformInfo,
+  SupportedOS,
+  SupportedArch,
+  ArchiveExtension,
+  BinaryManagerConfig,
+  BinaryInfo,
+  DownloadProgress,
+  ProgressCallback,
+  ChecksumResult,
+  DownloadResult,
+  CLIProxyProvider,
+  CLIProxyConfig,
+  ExecutorConfig,
+  ProviderConfig,
+  ProviderModelMapping,
+} from './types';
+
+// Platform detection
+export {
+  detectPlatform,
+  getDownloadUrl,
+  getChecksumsUrl,
+  getExecutableName,
+  isPlatformSupported,
+  getPlatformDescription,
+  CLIPROXY_VERSION,
+} from './platform-detector';
+
+// Binary management
+export {
+  BinaryManager,
+  ensureCLIProxyBinary,
+  isCLIProxyInstalled,
+  getCLIProxyPath,
+} from './binary-manager';
+
+// Config generation
+export {
+  generateConfig,
+  getClaudeEnvVars,
+  getProviderConfig,
+  getModelMapping,
+  getAuthDir,
+  getConfigPath,
+  configExists,
+  deleteConfig,
+  PROVIDER_CONFIGS,
+  CLIPROXY_DEFAULT_PORT,
+} from './config-generator';
+
+// Executor
+export { execClaudeWithCLIProxy, isPortAvailable, findAvailablePort } from './cliproxy-executor';
+
+// Authentication
+export type { AuthStatus } from './auth-handler';
+export {
+  isAuthenticated,
+  getAuthStatus,
+  getAllAuthStatus,
+  clearAuth,
+  triggerOAuth,
+  ensureAuth,
+  getOAuthConfig,
+  getProviderTokenDir,
+  displayAuthStatus,
+} from './auth-handler';
diff --git a/src/cliproxy/platform-detector.ts b/src/cliproxy/platform-detector.ts
new file mode 100644
index 00000000..197efe65
--- /dev/null
+++ b/src/cliproxy/platform-detector.ts
@@ -0,0 +1,117 @@
+/**
+ * Platform Detector for CLIProxyAPI Binary Downloads
+ *
+ * Detects OS and architecture to determine correct binary asset.
+ * Supports 6 platforms: darwin/linux/windows x amd64/arm64
+ */
+
+import { PlatformInfo, SupportedOS, SupportedArch, ArchiveExtension } from './types';
+
+/** CLIProxyAPI version pinned for stability */
+export const CLIPROXY_VERSION = '6.5.27';
+
+/**
+ * Platform mapping from Node.js values to CLIProxyAPI naming
+ */
+const OS_MAP: Record<string, SupportedOS | undefined> = {
+  darwin: 'darwin',
+  linux: 'linux',
+  win32: 'windows',
+};
+
+const ARCH_MAP: Record<string, SupportedArch | undefined> = {
+  x64: 'amd64',
+  arm64: 'arm64',
+};
+
+/**
+ * Detect current platform and return binary info
+ * @throws Error if platform is unsupported
+ */
+export function detectPlatform(): PlatformInfo {
+  const nodePlatform = process.platform;
+  const nodeArch = process.arch;
+
+  const os = OS_MAP[nodePlatform];
+  const arch = ARCH_MAP[nodeArch];
+
+  if (!os) {
+    throw new Error(
+      `Unsupported operating system: ${nodePlatform}\n` +
+        `Supported: macOS (darwin), Linux, Windows`
+    );
+  }
+
+  if (!arch) {
+    throw new Error(
+      `Unsupported CPU architecture: ${nodeArch}\n` + `Supported: x64 (amd64), arm64`
+    );
+  }
+
+  const extension: ArchiveExtension = os === 'windows' ? 'zip' : 'tar.gz';
+  const binaryName = `CLIProxyAPI_${CLIPROXY_VERSION}_${os}_${arch}.${extension}`;
+
+  return {
+    os,
+    arch,
+    binaryName,
+    extension,
+  };
+}
+
+/**
+ * Get executable name based on platform
+ * @returns Binary executable name (with .exe on Windows)
+ */
+export function getExecutableName(): string {
+  const platform = detectPlatform();
+  return platform.os === 'windows' ? 'CLIProxyAPI.exe' : 'CLIProxyAPI';
+}
+
+/**
+ * Get download URL for current platform
+ * @param version Optional version override (defaults to CLIPROXY_VERSION)
+ * @returns Full GitHub release download URL
+ */
+export function getDownloadUrl(version: string = CLIPROXY_VERSION): string {
+  const platform = detectPlatform();
+  const baseUrl = `https://github.com/router-for-me/CLIProxyAPI/releases/download/v${version}`;
+  return `${baseUrl}/${platform.binaryName}`;
+}
+
+/**
+ * Get checksums.txt URL for version
+ * @param version Optional version override
+ * @returns Full URL to checksums.txt
+ */
+export function getChecksumsUrl(version: string = CLIPROXY_VERSION): string {
+  return `https://github.com/router-for-me/CLIProxyAPI/releases/download/v${version}/checksums.txt`;
+}
+
+/**
+ * Check if platform is supported
+ * @returns true if current platform is supported
+ */
+export function isPlatformSupported(): boolean {
+  try {
+    detectPlatform();
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Get human-readable platform description
+ * @returns Description string (e.g., "macOS arm64")
+ */
+export function getPlatformDescription(): string {
+  try {
+    const platform = detectPlatform();
+    const osName =
+      platform.os === 'darwin' ? 'macOS' : platform.os === 'linux' ? 'Linux' : 'Windows';
+    return `${osName} ${platform.arch}`;
+  } catch {
+    return `${process.platform} ${process.arch} (unsupported)`;
+  }
+}
diff --git a/src/cliproxy/types.ts b/src/cliproxy/types.ts
new file mode 100644
index 00000000..3bd16abf
--- /dev/null
+++ b/src/cliproxy/types.ts
@@ -0,0 +1,180 @@
+/**
+ * CLIProxy Type Definitions
+ * Types for CLIProxyAPI binary management and execution
+ */
+
+/**
+ * Supported operating systems
+ */
+export type SupportedOS = 'darwin' | 'linux' | 'windows';
+
+/**
+ * Supported CPU architectures
+ */
+export type SupportedArch = 'amd64' | 'arm64';
+
+/**
+ * Archive extension based on platform
+ */
+export type ArchiveExtension = 'tar.gz' | 'zip';
+
+/**
+ * Platform detection result
+ */
+export interface PlatformInfo {
+  /** Operating system (darwin, linux, windows) */
+  os: SupportedOS;
+  /** CPU architecture (amd64, arm64) */
+  arch: SupportedArch;
+  /** Full binary archive name (e.g., CLIProxyAPI_6.5.27_linux_amd64.tar.gz) */
+  binaryName: string;
+  /** Archive extension (tar.gz for Unix, zip for Windows) */
+  extension: ArchiveExtension;
+}
+
+/**
+ * Binary manager configuration
+ */
+export interface BinaryManagerConfig {
+  /** CLIProxyAPI version to download */
+  version: string;
+  /** GitHub releases base URL */
+  releaseUrl: string;
+  /** Local binary storage path (~/.ccs/bin/) */
+  binPath: string;
+  /** Maximum download retry attempts */
+  maxRetries: number;
+  /** Enable verbose logging */
+  verbose: boolean;
+}
+
+/**
+ * Download progress callback
+ */
+export interface DownloadProgress {
+  /** Total bytes to download */
+  total: number;
+  /** Bytes downloaded so far */
+  downloaded: number;
+  /** Download percentage (0-100) */
+  percentage: number;
+}
+
+/**
+ * Download progress callback function type
+ */
+export type ProgressCallback = (progress: DownloadProgress) => void;
+
+/**
+ * Binary info after successful download/verification
+ */
+export interface BinaryInfo {
+  /** Full path to executable */
+  path: string;
+  /** CLIProxyAPI version */
+  version: string;
+  /** Platform info */
+  platform: PlatformInfo;
+  /** SHA256 checksum (verified) */
+  checksum: string;
+}
+
+/**
+ * Checksum verification result
+ */
+export interface ChecksumResult {
+  /** Whether checksum matched */
+  valid: boolean;
+  /** Expected checksum from checksums.txt */
+  expected: string;
+  /** Actual computed checksum */
+  actual: string;
+}
+
+/**
+ * Download result
+ */
+export interface DownloadResult {
+  /** Whether download succeeded */
+  success: boolean;
+  /** Path to downloaded file */
+  filePath?: string;
+  /** Error message if failed */
+  error?: string;
+  /** Number of retries attempted */
+  retries: number;
+}
+
+/**
+ * Supported CLIProxy providers
+ */
+export type CLIProxyProvider = 'gemini' | 'chatgpt' | 'qwen';
+
+/**
+ * CLIProxy config.yaml structure (minimal)
+ */
+export interface CLIProxyConfig {
+  port: number;
+  'api-keys': string[];
+  'auth-dir': string;
+  debug: boolean;
+  'gemini-api-key'?: Array<{
+    'api-key': string;
+    'base-url'?: string;
+  }>;
+  'codex-api-key'?: Array<{
+    'api-key': string;
+    'base-url'?: string;
+  }>;
+  'openai-compatibility'?: Array<{
+    name: string;
+    'base-url': string;
+    'api-key-entries': Array<{
+      'api-key': string;
+    }>;
+  }>;
+}
+
+/**
+ * Executor configuration
+ */
+export interface ExecutorConfig {
+  /** Port for CLIProxyAPI (default: 8317) */
+  port: number;
+  /** Timeout for proxy readiness in ms (default: 5000) */
+  timeout: number;
+  /** Enable verbose logging */
+  verbose: boolean;
+  /** Poll interval for port check in ms (default: 100) */
+  pollInterval: number;
+}
+
+/**
+ * Model mapping for each provider
+ */
+export interface ProviderModelMapping {
+  /** Default model for requests */
+  defaultModel: string;
+  /** Model for Claude CLI's ANTHROPIC_MODEL */
+  claudeModel: string;
+  /** Model for Claude CLI's ANTHROPIC_DEFAULT_OPUS_MODEL */
+  opusModel?: string;
+  /** Model for Claude CLI's ANTHROPIC_DEFAULT_SONNET_MODEL */
+  sonnetModel?: string;
+  /** Model for Claude CLI's ANTHROPIC_DEFAULT_HAIKU_MODEL */
+  haikuModel?: string;
+}
+
+/**
+ * Provider configuration
+ */
+export interface ProviderConfig {
+  /** Provider name */
+  name: CLIProxyProvider;
+  /** Display name for UI */
+  displayName: string;
+  /** Model configuration */
+  models: ProviderModelMapping;
+  /** Whether OAuth is required */
+  requiresOAuth: boolean;
+}
diff --git a/src/commands/help-command.ts b/src/commands/help-command.ts
index b90b4136..4c0d087b 100644
--- a/src/commands/help-command.ts
+++ b/src/commands/help-command.ts
@@ -27,13 +27,19 @@ export function handleHelpCommand(): void {
 
   console.log(colored('Model Switching:', 'cyan'));
   console.log(`  ${colored('ccs', 'yellow')}                         Use default Claude account`);
-  console.log(`  ${colored('ccs glm', 'yellow')}                     Switch to GLM 4.6 model`);
   console.log(
-    `  ${colored('ccs glmt', 'yellow')}                    Switch to GLM with thinking mode`
+    `  ${colored('ccs chatgpt', 'yellow')}                  ChatGPT via OAuth (zero config)`
   );
-  console.log(`  ${colored('ccs glmt --verbose', 'yellow')}          Enable debug logging`);
-  console.log(`  ${colored('ccs kimi', 'yellow')}                    Switch to Kimi for Coding`);
-  console.log(`  ${colored('ccs glm', 'yellow')} "debug this code"   Use GLM and run command`);
+  console.log(
+    `  ${colored('ccs gemini', 'yellow')}                   Gemini via OAuth (zero config)`
+  );
+  console.log(`  ${colored('ccs glm', 'yellow')}                      GLM 4.6 (API key required)`);
+  console.log(`  ${colored('ccs glmt', 'yellow')}                     GLM with thinking mode`);
+  console.log(`  ${colored('ccs kimi', 'yellow')}                     Kimi for Coding (API key)`);
+  console.log(
+    `  ${colored('ccs qwen', 'yellow')}                     Qwen via OAuth (zero config)`
+  );
+  console.log(`  ${colored('ccs gemini', 'yellow')} "explain this"   Use Gemini with prompt`);
   console.log('');
 
   console.log(colored('Account Management:', 'cyan'));
@@ -94,6 +100,7 @@ export function handleHelpCommand(): void {
 
   console.log(colored('Examples:', 'cyan'));
   console.log(`  ${colored('$ ccs', 'yellow')}                        # Use default account`);
+  console.log(`  ${colored('$ ccs gemini "explain code"', 'yellow')}  # Zero-config OAuth`);
   console.log(`  ${colored('$ ccs glm "implement API"', 'yellow')}    # Cost-optimized model`);
   console.log('');
   console.log(
diff --git a/src/management/doctor.ts b/src/management/doctor.ts
index 952e7b40..e353c7fd 100644
--- a/src/management/doctor.ts
+++ b/src/management/doctor.ts
@@ -9,6 +9,14 @@ import { spawn } from 'child_process';
 import { colored } from '../utils/helpers';
 import { detectClaudeCli } from '../utils/claude-detector';
 import packageJson from '../../package.json';
+import {
+  isCLIProxyInstalled,
+  getCLIProxyPath,
+  isPortAvailable,
+  getAllAuthStatus,
+  CLIPROXY_VERSION,
+  CLIPROXY_DEFAULT_PORT,
+} from '../cliproxy';
 
 // Make ora optional (might not be available during npm install postinstall)
 // ora v9+ is an ES module, need to use .default for CommonJS
@@ -156,6 +164,11 @@ class Doctor {
     this.checkSettingsSymlinks();
     console.log('');
 
+    // Group 5: CLIProxy (OAuth profiles)
+    console.log(colored('CLIProxy (OAuth Profiles):', 'bold'));
+    await this.checkCLIProxy();
+    console.log('');
+
     this.showReport();
     return this.results;
   }
@@ -739,6 +752,112 @@ class Doctor {
     }
   }
 
+  /**
+   * Check 11: CLIProxy health (OAuth profiles: gemini, chatgpt, qwen)
+   */
+  private async checkCLIProxy(): Promise<void> {
+    // 1. Binary installed?
+    const binarySpinner = ora('Checking CLIProxy binary').start();
+
+    if (isCLIProxyInstalled()) {
+      const binaryPath = getCLIProxyPath();
+      binarySpinner.succeed(
+        `  ${'CLIProxy Binary'.padEnd(26)}${colored('[OK]', 'green')}  v${CLIPROXY_VERSION}`
+      );
+      this.results.addCheck('CLIProxy Binary', 'success', undefined, undefined, {
+        status: 'OK',
+        info: `v${CLIPROXY_VERSION} (${binaryPath})`,
+      });
+    } else {
+      binarySpinner.info(
+        `  ${'CLIProxy Binary'.padEnd(26)}${colored('[i]', 'cyan')}  Not installed (downloads on first use)`
+      );
+      this.results.addCheck(
+        'CLIProxy Binary',
+        'success',
+        'Not installed yet',
+        'Run: ccs gemini "test" (will download automatically)',
+        { status: 'OK', info: 'Not installed (downloads on first use)' }
+      );
+    }
+
+    // 2. Config file exists?
+    const configSpinner = ora('Checking CLIProxy config').start();
+    const configPath = path.join(this.ccsDir, 'cliproxy.config.yaml');
+
+    if (fs.existsSync(configPath)) {
+      configSpinner.succeed(
+        `  ${'CLIProxy Config'.padEnd(26)}${colored('[OK]', 'green')}  cliproxy.config.yaml`
+      );
+      this.results.addCheck('CLIProxy Config', 'success', undefined, undefined, {
+        status: 'OK',
+        info: 'cliproxy.config.yaml',
+      });
+    } else {
+      configSpinner.info(
+        `  ${'CLIProxy Config'.padEnd(26)}${colored('[i]', 'cyan')}  Not created (generated on first use)`
+      );
+      this.results.addCheck('CLIProxy Config', 'success', 'Not created yet', undefined, {
+        status: 'OK',
+        info: 'Generated on first use',
+      });
+    }
+
+    // 3. OAuth status for each provider
+    const authStatuses = getAllAuthStatus();
+    for (const status of authStatuses) {
+      const authSpinner = ora(`Checking ${status.provider} auth`).start();
+      const providerName = status.provider.charAt(0).toUpperCase() + status.provider.slice(1);
+
+      if (status.authenticated) {
+        const lastAuth = status.lastAuth ? ` (${status.lastAuth.toLocaleDateString()})` : '';
+        authSpinner.succeed(
+          `  ${`${providerName} Auth`.padEnd(26)}${colored('[OK]', 'green')}  Authenticated${lastAuth}`
+        );
+        this.results.addCheck(`${providerName} Auth`, 'success', undefined, undefined, {
+          status: 'OK',
+          info: `Authenticated${lastAuth}`,
+        });
+      } else {
+        authSpinner.info(
+          `  ${`${providerName} Auth`.padEnd(26)}${colored('[i]', 'cyan')}  Not authenticated`
+        );
+        this.results.addCheck(
+          `${providerName} Auth`,
+          'success',
+          'Not authenticated',
+          `Run: ccs ${status.provider} --auth`,
+          { status: 'OK', info: 'Not authenticated (run ccs <profile> to login)' }
+        );
+      }
+    }
+
+    // 4. Port availability
+    const portSpinner = ora(`Checking port ${CLIPROXY_DEFAULT_PORT}`).start();
+    const portAvailable = await isPortAvailable(CLIPROXY_DEFAULT_PORT);
+
+    if (portAvailable) {
+      portSpinner.succeed(
+        `  ${'CLIProxy Port'.padEnd(26)}${colored('[OK]', 'green')}  ${CLIPROXY_DEFAULT_PORT} available`
+      );
+      this.results.addCheck('CLIProxy Port', 'success', undefined, undefined, {
+        status: 'OK',
+        info: `Port ${CLIPROXY_DEFAULT_PORT} available`,
+      });
+    } else {
+      portSpinner.warn(
+        `  ${'CLIProxy Port'.padEnd(26)}${colored('[!]', 'yellow')}  ${CLIPROXY_DEFAULT_PORT} in use`
+      );
+      this.results.addCheck(
+        'CLIProxy Port',
+        'warning',
+        `Port ${CLIPROXY_DEFAULT_PORT} is in use`,
+        `Check: lsof -i :${CLIPROXY_DEFAULT_PORT}`,
+        { status: 'WARN', info: `Port ${CLIPROXY_DEFAULT_PORT} in use` }
+      );
+    }
+  }
+
   /**
    * Show health check report
    */
diff --git a/src/utils/error-manager.ts b/src/utils/error-manager.ts
index d26572b3..d4a7fbe2 100644
--- a/src/utils/error-manager.ts
+++ b/src/utils/error-manager.ts
@@ -157,4 +157,89 @@ export class ErrorManager {
     console.error('');
     this.showErrorCode(ERROR_CODES.FS_CANNOT_WRITE_FILE);
   }
+
+  /**
+   * Show CLIProxy OAuth timeout error
+   */
+  static showOAuthTimeout(provider: string): void {
+    console.error('');
+    console.error(colored('+---------------------------------------------------------+', 'red'));
+    console.error(colored('|                   OAuth Timeout                         |', 'red'));
+    console.error(colored('+---------------------------------------------------------+', 'red'));
+    console.error('');
+    console.error('Authentication did not complete within 2 minutes.');
+    console.error('');
+    console.error(colored('Troubleshooting:', 'yellow'));
+    console.error('  1. Check if browser opened (popup blocker?)');
+    console.error('  2. Complete login in browser, then return here');
+    console.error('  3. Try different browser');
+    console.error('  4. Disable browser extensions temporarily');
+    console.error('');
+    console.error(colored('For headless/SSH environments:', 'cyan'));
+    console.error(`  ccs ${provider} --auth --headless`);
+    console.error('');
+    console.error('This displays manual authentication steps.');
+    console.error('');
+  }
+
+  /**
+   * Show CLIProxy port conflict error
+   */
+  static showPortConflict(port: number): void {
+    console.error('');
+    console.error(colored('+---------------------------------------------------------+', 'red'));
+    console.error(colored('|                   Port Conflict                         |', 'red'));
+    console.error(colored('+---------------------------------------------------------+', 'red'));
+    console.error('');
+    console.error(`CLIProxy port ${port} is already in use.`);
+    console.error('');
+    console.error(colored('Solutions:', 'yellow'));
+    console.error('  1. Find process using port:');
+    console.error(`     lsof -i :${port}           (macOS/Linux)`);
+    console.error(`     netstat -ano | findstr ${port}  (Windows)`);
+    console.error('');
+    console.error('  2. Kill the process:');
+    console.error(`     lsof -ti:${port} | xargs kill -9`);
+    console.error('');
+    console.error('  3. Wait and retry (process may exit on its own)');
+    console.error('');
+  }
+
+  /**
+   * Show CLIProxy binary download failure error
+   */
+  static showBinaryDownloadFailed(url: string, error: string): void {
+    console.error('');
+    console.error(colored('+---------------------------------------------------------+', 'red'));
+    console.error(colored('|                Binary Download Failed                   |', 'red'));
+    console.error(colored('+---------------------------------------------------------+', 'red'));
+    console.error('');
+    console.error(`Error: ${error}`);
+    console.error('');
+    console.error(colored('Troubleshooting:', 'yellow'));
+    console.error('  1. Check internet connection');
+    console.error('  2. Check firewall/proxy settings');
+    console.error('  3. Try again in a few minutes');
+    console.error('');
+    console.error(colored('Manual download:', 'cyan'));
+    console.error(`  URL: ${url}`);
+    console.error('  Save to: ~/.ccs/bin/cliproxyapi');
+    console.error('  chmod +x ~/.ccs/bin/cliproxyapi');
+    console.error('');
+  }
+
+  /**
+   * Show CLIProxy authentication required error
+   */
+  static showAuthRequired(provider: string): void {
+    console.error('');
+    console.error(colored(`[X] ${provider} authentication required`, 'red'));
+    console.error('');
+    console.error(colored('To authenticate:', 'yellow'));
+    console.error(`  ccs ${provider} --auth`);
+    console.error('');
+    console.error('This will open a browser for OAuth login.');
+    console.error('After login, you can use the profile normally.');
+    console.error('');
+  }
 }