refactor(setup): drop Apple Container support

Apple Container is no longer supported — the runtime abstraction in
src/container-runtime.ts is already Docker-only. Remove the remaining
setup-time branches that probed for it: the Apple Container runtime
option in the container build step, the APPLE_CONTAINER field emitted
by the environment check, and the `command -v container` probe in
verify. `--runtime docker` still parses for backwards compatibility
with the /setup skill.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

setup/container.ts

@@ -10,7 +10,9 @@ import { commandExists } from './platform.js';
 import { emitStatus } from './status.js';
 
 function parseArgs(args: string[]): { runtime: string } {
-  let runtime = '';
+  // `--runtime` is still accepted for backwards compatibility with the /setup
+  // skill, but `docker` is the only supported value.
+  let runtime = 'docker';
   for (let i = 0; i < args.length; i++) {
     if (args[i] === '--runtime' && args[i + 1]) {
       runtime = args[i + 1];
@@ -26,63 +28,7 @@ export async function run(args: string[]): Promise<void> {
   const image = 'nanoclaw-agent:latest';
   const logFile = path.join(projectRoot, 'logs', 'setup.log');
 
-  if (!runtime) {
-    emitStatus('SETUP_CONTAINER', {
-      RUNTIME: 'unknown',
-      IMAGE: image,
-      BUILD_OK: false,
-      TEST_OK: false,
-      STATUS: 'failed',
-      ERROR: 'missing_runtime_flag',
-      LOG: 'logs/setup.log',
-    });
-    process.exit(4);
-  }
-
-  // Validate runtime availability
-  if (runtime === 'apple-container' && !commandExists('container')) {
-    emitStatus('SETUP_CONTAINER', {
-      RUNTIME: runtime,
-      IMAGE: image,
-      BUILD_OK: false,
-      TEST_OK: false,
-      STATUS: 'failed',
-      ERROR: 'runtime_not_available',
-      LOG: 'logs/setup.log',
-    });
-    process.exit(2);
-  }
-
-  if (runtime === 'docker') {
-    if (!commandExists('docker')) {
-      emitStatus('SETUP_CONTAINER', {
-        RUNTIME: runtime,
-        IMAGE: image,
-        BUILD_OK: false,
-        TEST_OK: false,
-        STATUS: 'failed',
-        ERROR: 'runtime_not_available',
-        LOG: 'logs/setup.log',
-      });
-      process.exit(2);
-    }
-    try {
-      execSync('docker info', { stdio: 'ignore' });
-    } catch {
-      emitStatus('SETUP_CONTAINER', {
-        RUNTIME: runtime,
-        IMAGE: image,
-        BUILD_OK: false,
-        TEST_OK: false,
-        STATUS: 'failed',
-        ERROR: 'runtime_not_available',
-        LOG: 'logs/setup.log',
-      });
-      process.exit(2);
-    }
-  }
-
-  if (!['apple-container', 'docker'].includes(runtime)) {
+  if (runtime !== 'docker') {
     emitStatus('SETUP_CONTAINER', {
       RUNTIME: runtime,
       IMAGE: image,
@@ -95,9 +41,36 @@ export async function run(args: string[]): Promise<void> {
     process.exit(4);
   }
 
-  const buildCmd =
-    runtime === 'apple-container' ? 'container build' : 'docker build';
-  const runCmd = runtime === 'apple-container' ? 'container' : 'docker';
+  if (!commandExists('docker')) {
+    emitStatus('SETUP_CONTAINER', {
+      RUNTIME: runtime,
+      IMAGE: image,
+      BUILD_OK: false,
+      TEST_OK: false,
+      STATUS: 'failed',
+      ERROR: 'runtime_not_available',
+      LOG: 'logs/setup.log',
+    });
+    process.exit(2);
+  }
+
+  try {
+    execSync('docker info', { stdio: 'ignore' });
+  } catch {
+    emitStatus('SETUP_CONTAINER', {
+      RUNTIME: runtime,
+      IMAGE: image,
+      BUILD_OK: false,
+      TEST_OK: false,
+      STATUS: 'failed',
+      ERROR: 'runtime_not_available',
+      LOG: 'logs/setup.log',
+    });
+    process.exit(2);
+  }
+
+  const buildCmd = 'docker build';
+  const runCmd = 'docker';
 
   // Build-args from .env. Only INSTALL_CJK_FONTS is passed through today.
   // Keeps /setup and ./container/build.sh in sync — both read the same source.

setup/environment.ts

@@ -21,12 +21,6 @@ export async function run(_args: string[]): Promise<void> {
   const wsl = isWSL();
   const headless = isHeadless();
 
-  // Check Apple Container
-  let appleContainer: 'installed' | 'not_found' = 'not_found';
-  if (commandExists('container')) {
-    appleContainer = 'installed';
-  }
-
   // Check Docker
   let docker: 'running' | 'installed_not_running' | 'not_found' = 'not_found';
   if (commandExists('docker')) {
@@ -78,7 +72,6 @@ export async function run(_args: string[]): Promise<void> {
     {
       platform,
       wsl,
-      appleContainer,
       docker,
       hasEnv,
       hasAuth,
@@ -91,7 +84,6 @@ export async function run(_args: string[]): Promise<void> {
     PLATFORM: platform,
     IS_WSL: wsl,
     IS_HEADLESS: headless,
-    APPLE_CONTAINER: appleContainer,
     DOCKER: docker,
     HAS_ENV: hasEnv,
     HAS_AUTH: hasAuth,

setup/verify.ts

@@ -85,15 +85,10 @@ export async function run(_args: string[]): Promise<void> {
   // 2. Check container runtime
   let containerRuntime = 'none';
   try {
-    execSync('command -v container', { stdio: 'ignore' });
-    containerRuntime = 'apple-container';
+    execSync('docker info', { stdio: 'ignore' });
+    containerRuntime = 'docker';
   } catch {
-    try {
-      execSync('docker info', { stdio: 'ignore' });
-      containerRuntime = 'docker';
-    } catch {
-      // No runtime
-    }
+    // Docker not running
   }
 
   // 3. Check credentials