diff --git a/src/ccs.ts b/src/ccs.ts
index 3e1c22ef..9dd50056 100644
--- a/src/ccs.ts
+++ b/src/ccs.ts
@@ -338,6 +338,14 @@ async function main(): Promise<void> {
     return;
   }
 
+  // Special case: copilot command (GitHub Copilot integration)
+  if (firstArg === 'copilot' && args.length > 1) {
+    // `ccs copilot <subcommand>` - route to copilot command handler
+    const { handleCopilotCommand } = await import('./commands/copilot-command');
+    const exitCode = await handleCopilotCommand(args.slice(1));
+    process.exit(exitCode);
+  }
+
   // Special case: headless delegation (-p flag)
   if (args.includes('-p') || args.includes('--prompt')) {
     const { DelegationHandler } = await import('./delegation/delegation-handler');
@@ -384,6 +392,16 @@ async function main(): Promise<void> {
       const provider = profileInfo.provider || (profileInfo.name as CLIProxyProvider);
       const customSettingsPath = profileInfo.settingsPath; // undefined for hardcoded profiles
       await execClaudeWithCLIProxy(claudeCli, provider, remainingArgs, { customSettingsPath });
+    } else if (profileInfo.type === 'copilot') {
+      // COPILOT FLOW: GitHub Copilot subscription via copilot-api proxy
+      const { executeCopilotProfile } = await import('./copilot');
+      const copilotConfig = profileInfo.copilotConfig;
+      if (!copilotConfig) {
+        console.error('[X] Copilot configuration not found');
+        process.exit(1);
+      }
+      const exitCode = await executeCopilotProfile(copilotConfig, remainingArgs);
+      process.exit(exitCode);
     } else if (profileInfo.type === 'settings') {
       // Settings-based profiles (glm, glmt, kimi) are third-party providers
       // WebSearch is server-side tool - third-party providers have no access
diff --git a/src/commands/copilot-command.ts b/src/commands/copilot-command.ts
new file mode 100644
index 00000000..5606cb82
--- /dev/null
+++ b/src/commands/copilot-command.ts
@@ -0,0 +1,261 @@
+/**
+ * Copilot CLI Command
+ *
+ * Handles `ccs copilot <subcommand>` commands.
+ */
+
+import {
+  startAuthFlow,
+  getCopilotStatus,
+  startDaemon,
+  stopDaemon,
+  getAvailableModels,
+  isCopilotApiInstalled,
+} from '../copilot';
+import { loadOrCreateUnifiedConfig, saveUnifiedConfig } from '../config/unified-config-loader';
+import { DEFAULT_COPILOT_CONFIG } from '../config/unified-config-types';
+
+/**
+ * Handle copilot subcommand.
+ */
+export async function handleCopilotCommand(args: string[]): Promise<number> {
+  const subcommand = args[0];
+
+  switch (subcommand) {
+    case 'auth':
+      return handleAuth();
+    case 'status':
+      return handleStatus();
+    case 'models':
+      return handleModels();
+    case 'start':
+      return handleStart();
+    case 'stop':
+      return handleStop();
+    case 'enable':
+      return handleEnable();
+    case 'disable':
+      return handleDisable();
+    case undefined:
+    case 'help':
+    case '--help':
+    case '-h':
+      return handleHelp();
+    default:
+      console.error(`[X] Unknown subcommand: ${subcommand}`);
+      console.error('');
+      return handleHelp();
+  }
+}
+
+/**
+ * Show help for copilot commands.
+ */
+function handleHelp(): number {
+  console.log('GitHub Copilot Integration');
+  console.log('');
+  console.log('Usage: ccs copilot <subcommand>');
+  console.log('');
+  console.log('Subcommands:');
+  console.log('  auth      Start GitHub OAuth authentication');
+  console.log('  status    Show authentication and daemon status');
+  console.log('  models    List available models');
+  console.log('  start     Start copilot-api daemon');
+  console.log('  stop      Stop copilot-api daemon');
+  console.log('  enable    Enable copilot integration');
+  console.log('  disable   Disable copilot integration');
+  console.log('  help      Show this help message');
+  console.log('');
+  console.log('After setup, use: ccs copilot  (as profile name)');
+  console.log('');
+  return 0;
+}
+
+/**
+ * Handle auth subcommand.
+ */
+async function handleAuth(): Promise<number> {
+  if (!isCopilotApiInstalled()) {
+    console.error('[X] copilot-api is not installed.');
+    console.error('');
+    console.error('Install with: npm install -g copilot-api');
+    return 1;
+  }
+
+  const result = await startAuthFlow();
+
+  if (result.success) {
+    console.log('');
+    console.log('[OK] Authentication successful!');
+    console.log('');
+    console.log('Next steps:');
+    console.log('  1. Enable copilot: ccs copilot enable');
+    console.log('  2. Start daemon:   npx copilot-api start');
+    console.log('  3. Use copilot:    ccs copilot');
+    return 0;
+  } else {
+    console.error('');
+    console.error(`[X] ${result.error}`);
+    return 1;
+  }
+}
+
+/**
+ * Handle status subcommand.
+ */
+async function handleStatus(): Promise<number> {
+  const config = loadOrCreateUnifiedConfig();
+  const copilotConfig = config.copilot ?? DEFAULT_COPILOT_CONFIG;
+
+  const status = await getCopilotStatus(copilotConfig);
+
+  console.log('GitHub Copilot Status');
+  console.log('─────────────────────');
+  console.log('');
+
+  // Enabled status
+  const enabledIcon = copilotConfig.enabled ? '[OK]' : '[X]';
+  const enabledText = copilotConfig.enabled ? 'Enabled' : 'Disabled';
+  console.log(`Integration:    ${enabledIcon} ${enabledText}`);
+
+  // Auth status
+  const authIcon = status.auth.authenticated ? '[OK]' : '[X]';
+  const authText = status.auth.authenticated ? 'Authenticated' : 'Not authenticated';
+  console.log(`Authentication: ${authIcon} ${authText}`);
+
+  // Daemon status
+  const daemonIcon = status.daemon.running ? '[OK]' : '[X]';
+  const daemonText = status.daemon.running ? 'Running' : 'Not running';
+  console.log(`Daemon:         ${daemonIcon} ${daemonText}`);
+
+  console.log('');
+  console.log('Configuration:');
+  console.log(`  Port:         ${copilotConfig.port}`);
+  console.log(`  Model:        ${copilotConfig.model}`);
+  console.log(`  Account Type: ${copilotConfig.account_type}`);
+  console.log(`  Auto-start:   ${copilotConfig.auto_start ? 'Yes' : 'No'}`);
+
+  if (copilotConfig.rate_limit !== null) {
+    console.log(`  Rate Limit:   ${copilotConfig.rate_limit}s`);
+  }
+
+  console.log('');
+
+  // Show next steps if not fully configured
+  if (!copilotConfig.enabled || !status.auth.authenticated || !status.daemon.running) {
+    console.log('Next steps:');
+    if (!copilotConfig.enabled) {
+      console.log('  - Enable:      ccs copilot enable');
+    }
+    if (!status.auth.authenticated) {
+      console.log('  - Auth:        ccs copilot auth');
+    }
+    if (!status.daemon.running) {
+      console.log('  - Start:       ccs copilot start');
+    }
+  }
+
+  return 0;
+}
+
+/**
+ * Handle models subcommand.
+ */
+async function handleModels(): Promise<number> {
+  const config = loadOrCreateUnifiedConfig();
+  const copilotConfig = config.copilot ?? DEFAULT_COPILOT_CONFIG;
+
+  console.log('Available Copilot Models');
+  console.log('────────────────────────');
+  console.log('');
+
+  const models = await getAvailableModels(copilotConfig.port);
+
+  for (const model of models) {
+    const current = model.id === copilotConfig.model ? ' [CURRENT]' : '';
+    const defaultMark = model.isDefault ? ' (default)' : '';
+    console.log(`  ${model.id}${current}${defaultMark}`);
+    console.log(`    Provider: ${model.provider}`);
+  }
+
+  console.log('');
+  console.log('To change model: ccs config (Copilot section)');
+
+  return 0;
+}
+
+/**
+ * Handle start subcommand.
+ */
+async function handleStart(): Promise<number> {
+  const config = loadOrCreateUnifiedConfig();
+  const copilotConfig = config.copilot ?? DEFAULT_COPILOT_CONFIG;
+
+  console.log(`[i] Starting copilot-api daemon on port ${copilotConfig.port}...`);
+
+  const result = await startDaemon(copilotConfig);
+
+  if (result.success) {
+    console.log(`[OK] Daemon started (PID: ${result.pid})`);
+    return 0;
+  } else {
+    console.error(`[X] ${result.error}`);
+    return 1;
+  }
+}
+
+/**
+ * Handle stop subcommand.
+ */
+async function handleStop(): Promise<number> {
+  console.log('[i] Stopping copilot-api daemon...');
+
+  const result = await stopDaemon();
+
+  if (result.success) {
+    console.log('[OK] Daemon stopped');
+    return 0;
+  } else {
+    console.error(`[X] ${result.error}`);
+    return 1;
+  }
+}
+
+/**
+ * Handle enable subcommand.
+ */
+async function handleEnable(): Promise<number> {
+  const config = loadOrCreateUnifiedConfig();
+
+  if (!config.copilot) {
+    config.copilot = { ...DEFAULT_COPILOT_CONFIG };
+  }
+
+  config.copilot.enabled = true;
+  saveUnifiedConfig(config);
+
+  console.log('[OK] Copilot integration enabled');
+  console.log('');
+  console.log('Next steps:');
+  console.log('  1. Authenticate: ccs copilot auth');
+  console.log('  2. Start daemon: ccs copilot start');
+  console.log('  3. Use:          ccs copilot');
+
+  return 0;
+}
+
+/**
+ * Handle disable subcommand.
+ */
+async function handleDisable(): Promise<number> {
+  const config = loadOrCreateUnifiedConfig();
+
+  if (config.copilot) {
+    config.copilot.enabled = false;
+    saveUnifiedConfig(config);
+  }
+
+  console.log('[OK] Copilot integration disabled');
+
+  return 0;
+}