diff --git a/backend/system_api.py b/backend/system_api.py
new file mode 100644
index 0000000..1294d16
--- /dev/null
+++ b/backend/system_api.py
@@ -0,0 +1,135 @@
+import os
+from pathlib import Path
+
+from fastapi import APIRouter
+from pydantic import BaseModel
+
+from backend.config_store import get_github_public_config, has_openai_key
+from backend.runtime_logs import add_log
+from backend.shell_runner import run_command
+
+router = APIRouter(prefix='/api/system', tags=['system'])
+
+DATA_DIR = Path(os.getenv('DEVCONSOLE_DATA_DIR', '/var/lib/devconsole'))
+PROJECTS_DIR = DATA_DIR / 'projects'
+
+
+def _runtime_env_prefix() -> str:
+    runtime_home = os.getenv('DEVCONSOLE_RUNTIME_HOME') or os.getenv('HOME') or '/home/devconsole'
+    flutter_home = os.getenv('FLUTTER_HOME') or f'{runtime_home}/flutter'
+    android_home = os.getenv('ANDROID_HOME') or os.getenv('ANDROID_SDK_ROOT') or f'{runtime_home}/Android'
+    pub_cache = os.getenv('PUB_CACHE') or f'{runtime_home}/.pub-cache'
+    return (
+        f'export HOME="{runtime_home}" '
+        f'PUB_CACHE="{pub_cache}" '
+        f'ANDROID_HOME="{android_home}" '
+        f'ANDROID_SDK_ROOT="{android_home}" '
+        f'PATH="{flutter_home}/bin:{android_home}/cmdline-tools/latest/bin:{android_home}/platform-tools:$PATH" && '
+    )
+
+
+def _check(command: str, timeout: int = 20) -> dict:
+    try:
+        result = run_command(command, PROJECTS_DIR.as_posix(), timeout=timeout)
+        return {
+            'ok': result['returncode'] == 0,
+            'returncode': result['returncode'],
+            'stdout': (result.get('stdout') or '').strip()[-600:],
+            'stderr': (result.get('stderr') or '').strip()[-600:],
+        }
+    except Exception as exc:
+        return {'ok': False, 'returncode': -1, 'stdout': '', 'stderr': str(exc)}
+
+
+class SystemRestartRequest(BaseModel):
+    target: str
+
+
+@router.get('/checks')
+async def system_checks():
+    PROJECTS_DIR.mkdir(parents=True, exist_ok=True)
+    env = _runtime_env_prefix()
+
+    checks = [
+        {
+            'id': 'devconsole',
+            'title': 'DevConsole',
+            'restartable': True,
+            **_check('systemctl is-active devconsole || true', 10),
+        },
+        {
+            'id': 'github',
+            'title': 'GitHub',
+            'restartable': False,
+            'ok': bool(get_github_public_config().get('token_set')),
+            'returncode': 0,
+            'stdout': 'token configured' if get_github_public_config().get('token_set') else 'token missing',
+            'stderr': '',
+        },
+        {
+            'id': 'openai',
+            'title': 'OpenAI',
+            'restartable': False,
+            'ok': has_openai_key(),
+            'returncode': 0,
+            'stdout': 'configured' if has_openai_key() else 'not configured',
+            'stderr': '',
+        },
+        {
+            'id': 'flutter',
+            'title': 'Flutter',
+            'restartable': False,
+            **_check(f'{env}flutter --version | head -n 1', 30),
+        },
+        {
+            'id': 'android_sdk',
+            'title': 'Android SDK',
+            'restartable': False,
+            **_check(f'{env}sdkmanager --version', 30),
+        },
+        {
+            'id': 'adb',
+            'title': 'ADB',
+            'restartable': True,
+            **_check(f'{env}adb version | head -n 1', 20),
+        },
+        {
+            'id': 'docker',
+            'title': 'Docker',
+            'restartable': True,
+            **_check('docker --version', 20),
+        },
+        {
+            'id': 'nginx',
+            'title': 'Nginx',
+            'restartable': True,
+            **_check('systemctl is-active nginx || true', 10),
+        },
+    ]
+
+    for item in checks:
+        if item['id'] == 'devconsole':
+            item['ok'] = 'active' in item.get('stdout', '')
+        if item['id'] == 'nginx':
+            item['ok'] = 'active' in item.get('stdout', '')
+
+    return {'success': True, 'systems': checks}
+
+
+@router.post('/restart')
+async def system_restart(payload: SystemRestartRequest):
+    target = payload.target
+    commands = {
+        'devconsole': 'sudo systemctl restart devconsole',
+        'adb': f'{_runtime_env_prefix()}adb kill-server && {_runtime_env_prefix()}adb start-server',
+        'docker': 'sudo systemctl restart docker',
+        'nginx': 'sudo systemctl restart nginx',
+    }
+
+    command = commands.get(target)
+    if not command:
+        return {'success': False, 'message': 'Restart is not allowed for this target'}
+
+    add_log(f'System restart requested: {target}')
+    result = _check(command, 60)
+    return {'success': result['ok'], 'target': target, 'result': result}