diff --git a/backend/runtime_api.py b/backend/runtime_api.py
index d8686d2..a406723 100644
--- a/backend/runtime_api.py
+++ b/backend/runtime_api.py
@@ -1,7 +1,10 @@
+import json
 import os
+import subprocess
 from pathlib import Path
 
 from fastapi import APIRouter, HTTPException
+from fastapi.responses import StreamingResponse
 from pydantic import BaseModel
 
 from backend.android_tools import find_apks
@@ -39,43 +42,13 @@ class RuntimeCommandRequest(BaseModel):
 
 def _runtime_commands() -> dict[str, dict]:
     return {
-        'git_pull': {
-            'label': 'Git Pull',
-            'command': 'git pull',
-            'timeout': 600,
-        },
-        'flutter_clean': {
-            'label': 'Flutter Clean',
-            'command': _flutter('clean'),
-            'timeout': 900,
-        },
-        'flutter_pub_get': {
-            'label': 'Flutter Pub Get',
-            'command': _flutter('pub get'),
-            'timeout': 900,
-        },
-        'flutter_build_apk': {
-            'label': 'Flutter Build APK',
-            'command': _flutter('build apk --release'),
-            'timeout': 3600,
-        },
-        'flutter_run_profile': {
-            'label': 'Flutter Run Profile',
-            'command': _flutter('run --profile'),
-            'timeout': 1800,
-            'device': True,
-        },
-        'adb_reconnect': {
-            'label': 'ADB Reconnect',
-            'command': f'{_runtime_env_prefix()}adb reconnect',
-            'timeout': 120,
-        },
-        'adb_logcat': {
-            'label': 'ADB Logcat Snapshot',
-            'command': f'{_runtime_env_prefix()}adb logcat -d -t 300',
-            'timeout': 120,
-            'device': True,
-        },
+        'git_pull': {'label': 'Git Pull', 'command': 'git pull', 'timeout': 600},
+        'flutter_clean': {'label': 'Flutter Clean', 'command': _flutter('clean'), 'timeout': 900},
+        'flutter_pub_get': {'label': 'Flutter Pub Get', 'command': _flutter('pub get'), 'timeout': 900},
+        'flutter_build_apk': {'label': 'Flutter Build APK', 'command': _flutter('build apk --release'), 'timeout': 3600},
+        'flutter_run_profile': {'label': 'Flutter Run Profile', 'command': _flutter('run --profile'), 'timeout': 1800, 'device': True},
+        'adb_reconnect': {'label': 'ADB Reconnect', 'command': f'{_runtime_env_prefix()}adb reconnect', 'timeout': 120},
+        'adb_logcat': {'label': 'ADB Logcat Snapshot', 'command': f'{_runtime_env_prefix()}adb logcat -d -t 300', 'timeout': 120, 'device': True},
     }
 
 
@@ -89,22 +62,49 @@ def _workspace_cwd(workspace: str) -> str:
 def _with_device(command: str, device: str | None, enabled: bool) -> str:
     if not enabled or not device:
         return command
-
     if 'adb ' in command:
         return command.replace('adb ', f'adb -s {device} ', 1)
-
     if 'flutter ' in command and ' -d ' not in command:
         return f'{command} -d {device}'
-
     return command
 
 
+def _event(payload: dict) -> str:
+    return json.dumps(payload, ensure_ascii=False) + '\n'
+
+
+def _stream_command(command: str, cwd: str, timeout: int):
+    process = subprocess.Popen(
+        command,
+        cwd=cwd,
+        shell=True,
+        text=True,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+        bufsize=1,
+    )
+
+    yield _event({'type': 'start', 'message': command})
+
+    try:
+        assert process.stdout is not None
+        for line in iter(process.stdout.readline, ''):
+            if not line:
+                break
+            yield _event({'type': 'line', 'message': line.rstrip()})
+
+        returncode = process.wait(timeout=timeout)
+    except subprocess.TimeoutExpired:
+        process.kill()
+        returncode = -1
+        yield _event({'type': 'error', 'message': 'Command timeout'})
+
+    yield _event({'type': 'done', 'returncode': returncode})
+
+
 @router.get('/logs')
 async def runtime_logs():
-    return {
-        'success': True,
-        'logs': get_logs(),
-    }
+    return {'success': True, 'logs': get_logs()}
 
 
 @router.get('/commands')
@@ -112,11 +112,7 @@ async def runtime_commands():
     return {
         'success': True,
         'commands': [
-            {
-                'id': command_id,
-                'label': config['label'],
-                'needs_device': bool(config.get('device')),
-            }
+            {'id': command_id, 'label': config['label'], 'needs_device': bool(config.get('device'))}
             for command_id, config in _runtime_commands().items()
         ],
     }
@@ -133,39 +129,41 @@ async def runtime_event(payload: dict):
 async def runtime_command(payload: RuntimeCommandRequest):
     commands = _runtime_commands()
     config = commands.get(payload.command)
-
     if not config:
         raise HTTPException(status_code=400, detail='Runtime command is not allowed')
 
     cwd = _workspace_cwd(payload.workspace)
-    command = _with_device(
-        config['command'],
-        payload.device,
-        bool(config.get('device')),
-    )
+    command = _with_device(config['command'], payload.device, bool(config.get('device')))
 
     add_log(f"Runtime command started: {config['label']}")
-
     result = run_command(command, cwd, timeout=int(config.get('timeout', 900)))
+    add_log(f"Runtime command finished: {config['label']} (exit {result['returncode']})")
 
-    add_log(
-        f"Runtime command finished: {config['label']} "
-        f"(exit {result['returncode']})"
+    return {'success': result['returncode'] == 0, 'command': payload.command, 'label': config['label'], 'result': result}
+
+
+@router.post('/command-stream')
+async def runtime_command_stream(payload: RuntimeCommandRequest):
+    commands = _runtime_commands()
+    config = commands.get(payload.command)
+    if not config:
+        raise HTTPException(status_code=400, detail='Runtime command is not allowed')
+
+    cwd = _workspace_cwd(payload.workspace)
+    command = _with_device(config['command'], payload.device, bool(config.get('device')))
+
+    add_log(f"Runtime stream started: {config['label']}")
+
+    return StreamingResponse(
+        _stream_command(command, cwd, int(config.get('timeout', 900))),
+        media_type='application/x-ndjson',
     )
 
-    return {
-        'success': result['returncode'] == 0,
-        'command': payload.command,
-        'label': config['label'],
-        'result': result,
-    }
-
 
 @router.post('/install-latest-apk')
 async def runtime_install_latest_apk(payload: RuntimeCommandRequest):
     cwd = _workspace_cwd(payload.workspace)
     apks = find_apks(cwd)
-
     if not apks:
         raise HTTPException(status_code=404, detail='APK not found. Build project first.')
 
@@ -174,17 +172,10 @@ async def runtime_install_latest_apk(payload: RuntimeCommandRequest):
         adb = f'{_runtime_env_prefix()}adb -s {payload.device}'
 
     command = f'{adb} install -r "{apks[0]}"'
-
     add_log(f'Runtime APK install started: {apks[0]}')
     result = run_command(command, cwd, timeout=900)
     add_log(f"Runtime APK install finished (exit {result['returncode']})")
-
-    return {
-        'success': result['returncode'] == 0,
-        'apk': apks[0],
-        'device': payload.device,
-        'result': result,
-    }
+    return {'success': result['returncode'] == 0, 'apk': apks[0], 'device': payload.device, 'result': result}
 
 
 @router.post('/restart-app')
@@ -198,14 +189,7 @@ async def runtime_restart_app(payload: RuntimeCommandRequest):
         adb = f'{_runtime_env_prefix()}adb -s {payload.device}'
 
     command = f'{adb} shell monkey -p {payload.package_name} 1'
-
     add_log(f'Runtime app restart requested: {payload.package_name}')
     result = run_command(command, cwd, timeout=120)
     add_log(f"Runtime app restart finished (exit {result['returncode']})")
-
-    return {
-        'success': result['returncode'] == 0,
-        'package_name': payload.package_name,
-        'device': payload.device,
-        'result': result,
-    }
+    return {'success': result['returncode'] == 0, 'package_name': payload.package_name, 'device': payload.device, 'result': result}