commit bcddcd0bed90526ddbad1ca40f5a2c000c354922
Author: C# 开发 <chris@git.2024025.xyz>
Date:   Wed Aug 19 01:16:32 2026 +0000

    交运行工位桩：三口契约、运行服务、六态 VM、跨线程切 UI。
    
    采集/PLC/Inspect 均为桩，验收 1–8 可测。不部署现场。

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..816f864
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,15 @@
+bin/
+obj/
+.vs/
+.idea/
+*.user
+*.suo
+*.userosscache
+*.sln.docstates
+[Dd]ebug/
+[Rr]elease/
+*.dll
+*.pdb
+*.cache
+TestResults/
+.dotnet/
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..c947f88
--- /dev/null
+++ b/README.md
@@ -0,0 +1,27 @@
+
+# VisionHost 运行工位桩
+
+本迭代只交操作员运行壳（验收 1–7）。采集 / PLC / Inspect 均为桩，不做真检测、不改主干、不部署。
+
+## 工程
+
+- `VisionHost.Contracts` 三口：`IFrameSource` / `IInspectService` / `IPlcIo`
+- `VisionHost.Runtime` 运行服务 + `RunViewModel`（绑定名对齐 WPF 骨架）
+- `VisionHost.Runtime.Tests` 运行壳用例
+- `VisionHost.App` 操作员运行页（WPF，hex 转笔刷）
+
+可点界面：`src/VisionHost.App`（Windows）。`LastResultBrush`/`AlarmBrush` 用 `HexToBrushConverter`。
+
+## 行为
+
+- 确认启动才清零并开跑；停机保持计数
+- 未连接 / 重连中：不弹确认，`CanStart=false`
+- Inspect 桩：1–4 OK，第 5 拍 `NG STUB`，拍号在算法桩内计
+- 六态由运行服务推，VM 不自判
+
+## 构建
+
+```
+export PATH="$HOME/.dotnet:$PATH"
+dotnet test VisionHost.sln
+```
diff --git a/VisionHost.sln b/VisionHost.sln
new file mode 100644
index 0000000..1c02b7b
--- /dev/null
+++ b/VisionHost.sln
@@ -0,0 +1,34 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "VisionHost.Contracts", "src\VisionHost.Contracts\VisionHost.Contracts.csproj", "{A1111111-1111-1111-1111-111111111111}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "VisionHost.Runtime", "src\VisionHost.Runtime\VisionHost.Runtime.csproj", "{A2222222-2222-2222-2222-222222222222}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "VisionHost.Runtime.Tests", "tests\VisionHost.Runtime.Tests\VisionHost.Runtime.Tests.csproj", "{A3333333-3333-3333-3333-333333333333}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "VisionHost.App", "src\VisionHost.App\VisionHost.App.csproj", "{A4444444-4444-4444-4444-444444444444}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{A1111111-1111-1111-1111-111111111111}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A1111111-1111-1111-1111-111111111111}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A1111111-1111-1111-1111-111111111111}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A1111111-1111-1111-1111-111111111111}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A2222222-2222-2222-2222-222222222222}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A2222222-2222-2222-2222-222222222222}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A2222222-2222-2222-2222-222222222222}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A2222222-2222-2222-2222-222222222222}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A3333333-3333-3333-3333-333333333333}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A3333333-3333-3333-3333-333333333333}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A3333333-3333-3333-3333-333333333333}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A3333333-3333-3333-3333-333333333333}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A4444444-4444-4444-4444-444444444444}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A4444444-4444-4444-4444-444444444444}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A4444444-4444-4444-4444-444444444444}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A4444444-4444-4444-4444-444444444444}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal
diff --git a/src/VisionHost.App/App.xaml b/src/VisionHost.App/App.xaml
new file mode 100644
index 0000000..8692475
--- /dev/null
+++ b/src/VisionHost.App/App.xaml
@@ -0,0 +1,12 @@
+<Application x:Class="VisionHost.App.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             StartupUri="Views/RunStationView.xaml">
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="Themes/Station.xaml"/>
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>
diff --git a/src/VisionHost.App/App.xaml.cs b/src/VisionHost.App/App.xaml.cs
new file mode 100644
index 0000000..82e7294
--- /dev/null
+++ b/src/VisionHost.App/App.xaml.cs
@@ -0,0 +1,7 @@
+using System.Windows;
+
+namespace VisionHost.App;
+
+public partial class App : Application
+{
+}
diff --git a/src/VisionHost.App/Converters/HexToBrushConverter.cs b/src/VisionHost.App/Converters/HexToBrushConverter.cs
new file mode 100644
index 0000000..bb9d136
--- /dev/null
+++ b/src/VisionHost.App/Converters/HexToBrushConverter.cs
@@ -0,0 +1,25 @@
+using System.Globalization;
+using System.Windows.Data;
+using System.Windows.Media;
+
+namespace VisionHost.App.Converters;
+
+public sealed class HexToBrushConverter : IValueConverter
+{
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not string hex || hex.Length < 7 || hex[0] != '#')
+            return Brushes.White;
+        try
+        {
+            return (SolidColorBrush)new BrushConverter().ConvertFromString(hex)!;
+        }
+        catch
+        {
+            return Brushes.White;
+        }
+    }
+
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
diff --git a/src/VisionHost.App/Themes/Station.xaml b/src/VisionHost.App/Themes/Station.xaml
new file mode 100644
index 0000000..d501ea4
--- /dev/null
+++ b/src/VisionHost.App/Themes/Station.xaml
@@ -0,0 +1,110 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+
+    <!-- 1920x1080 · 工位约 1.5m · 暗底高对比 -->
+    <Color x:Key="BgColor">#1A1D21</Color>
+    <Color x:Key="PanelColor">#252A31</Color>
+    <Color x:Key="LineColor">#3A414B</Color>
+    <Color x:Key="TextColor">#F2F4F7</Color>
+    <Color x:Key="MutedColor">#9AA3AF</Color>
+    <Color x:Key="OkColor">#22C55E</Color>
+    <Color x:Key="NgColor">#EF4444</Color>
+    <Color x:Key="AlarmColor">#F59E0B</Color>
+    <Color x:Key="BusyColor">#38BDF8</Color>
+    <Color x:Key="OfflineColor">#9CA3AF</Color>
+    <Color x:Key="StartColor">#16A34A</Color>
+    <Color x:Key="StopColor">#DC2626</Color>
+
+    <SolidColorBrush x:Key="BgBrush" Color="{StaticResource BgColor}"/>
+    <SolidColorBrush x:Key="PanelBrush" Color="{StaticResource PanelColor}"/>
+    <SolidColorBrush x:Key="LineBrush" Color="{StaticResource LineColor}"/>
+    <SolidColorBrush x:Key="TextBrush" Color="{StaticResource TextColor}"/>
+    <SolidColorBrush x:Key="MutedBrush" Color="{StaticResource MutedColor}"/>
+    <SolidColorBrush x:Key="OkBrush" Color="{StaticResource OkColor}"/>
+    <SolidColorBrush x:Key="NgBrush" Color="{StaticResource NgColor}"/>
+    <SolidColorBrush x:Key="AlarmBrush" Color="{StaticResource AlarmColor}"/>
+    <SolidColorBrush x:Key="BusyBrush" Color="{StaticResource BusyColor}"/>
+    <SolidColorBrush x:Key="OfflineBrush" Color="{StaticResource OfflineColor}"/>
+    <SolidColorBrush x:Key="StartBrush" Color="{StaticResource StartColor}"/>
+    <SolidColorBrush x:Key="StopBrush" Color="{StaticResource StopColor}"/>
+
+    <Style x:Key="StationWindow" TargetType="Window">
+        <Setter Property="Background" Value="{StaticResource BgBrush}"/>
+        <Setter Property="Foreground" Value="{StaticResource TextBrush}"/>
+        <Setter Property="FontFamily" Value="Microsoft YaHei UI"/>
+        <Setter Property="FontSize" Value="18"/>
+        <Setter Property="MinWidth" Value="1280"/>
+        <Setter Property="MinHeight" Value="720"/>
+    </Style>
+
+    <Style x:Key="TopBarText" TargetType="TextBlock">
+        <Setter Property="Foreground" Value="{StaticResource TextBrush}"/>
+        <Setter Property="FontSize" Value="22"/>
+        <Setter Property="VerticalAlignment" Value="Center"/>
+    </Style>
+
+    <Style x:Key="BadgeText" TargetType="TextBlock">
+        <Setter Property="FontSize" Value="48"/>
+        <Setter Property="FontWeight" Value="Bold"/>
+        <Setter Property="Foreground" Value="{StaticResource TextBrush}"/>
+        <Setter Property="HorizontalAlignment" Value="Center"/>
+        <Setter Property="VerticalAlignment" Value="Center"/>
+    </Style>
+
+    <Style x:Key="ShotText" TargetType="TextBlock">
+        <Setter Property="FontSize" Value="48"/>
+        <Setter Property="FontWeight" Value="Bold"/>
+        <Setter Property="Foreground" Value="{StaticResource TextBrush}"/>
+        <Setter Property="HorizontalAlignment" Value="Center"/>
+    </Style>
+
+    <Style x:Key="CountText" TargetType="TextBlock">
+        <Setter Property="FontSize" Value="28"/>
+        <Setter Property="Foreground" Value="{StaticResource TextBrush}"/>
+        <Setter Property="Margin" Value="0,8"/>
+    </Style>
+
+    <Style x:Key="AlarmText" TargetType="TextBlock">
+        <Setter Property="FontSize" Value="20"/>
+        <Setter Property="Foreground" Value="{StaticResource TextBrush}"/>
+        <Setter Property="VerticalAlignment" Value="Center"/>
+        <Setter Property="TextTrimming" Value="CharacterEllipsis"/>
+    </Style>
+
+    <Style x:Key="RunButton" TargetType="Button">
+        <Setter Property="Width" Value="160"/>
+        <Setter Property="Height" Value="64"/>
+        <Setter Property="FontSize" Value="22"/>
+        <Setter Property="FontWeight" Value="SemiBold"/>
+        <Setter Property="Foreground" Value="{StaticResource TextBrush}"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="Cursor" Value="Hand"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="Button">
+                    <Border x:Name="Bd" Background="{TemplateBinding Background}" CornerRadius="4">
+                        <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsEnabled" Value="False">
+                            <Setter TargetName="Bd" Property="Opacity" Value="0.35"/>
+                        </Trigger>
+                        <Trigger Property="IsPressed" Value="True">
+                            <Setter TargetName="Bd" Property="Opacity" Value="0.8"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <Style x:Key="StartButton" TargetType="Button" BasedOn="{StaticResource RunButton}">
+        <Setter Property="Background" Value="{StaticResource StartBrush}"/>
+        <Setter Property="Content" Value="启动"/>
+    </Style>
+
+    <Style x:Key="StopButton" TargetType="Button" BasedOn="{StaticResource RunButton}">
+        <Setter Property="Background" Value="{StaticResource StopBrush}"/>
+        <Setter Property="Content" Value="停止"/>
+    </Style>
+</ResourceDictionary>
diff --git a/src/VisionHost.App/Views/RunStationView.xaml b/src/VisionHost.App/Views/RunStationView.xaml
new file mode 100644
index 0000000..3355508
--- /dev/null
+++ b/src/VisionHost.App/Views/RunStationView.xaml
@@ -0,0 +1,137 @@
+<Window x:Class="VisionHost.App.Views.RunStationView"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:cvt="clr-namespace:VisionHost.App.Converters"
+        xmlns:rt="clr-namespace:VisionHost.Runtime;assembly=VisionHost.Runtime"
+        Title="运行工位"
+        Width="1920" Height="1080"
+        WindowState="Maximized"
+        Style="{StaticResource StationWindow}">
+    <Window.Resources>
+        <cvt:HexToBrushConverter x:Key="HexToBrush"/>
+    </Window.Resources>
+
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="72"/>
+            <RowDefinition Height="*"/>
+            <RowDefinition Height="88"/>
+        </Grid.RowDefinitions>
+
+        <Border Grid.Row="0" Background="{StaticResource PanelBrush}" BorderBrush="{StaticResource LineBrush}" BorderThickness="0,0,0,1" Padding="24,0">
+            <Grid>
+                <TextBlock Style="{StaticResource TopBarText}">
+                    <Run Text="配方："/><Run Text="{Binding RecipeName, FallbackValue=—}"/>
+                </TextBlock>
+                <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
+                    <Ellipse Width="14" Height="14" Margin="0,0,10,0" VerticalAlignment="Center">
+                        <Ellipse.Style>
+                            <Style TargetType="Ellipse">
+                                <Setter Property="Fill" Value="{StaticResource OfflineBrush}"/>
+                                <Style.Triggers>
+                                    <DataTrigger Binding="{Binding ConnectionText}" Value="已连接">
+                                        <Setter Property="Fill" Value="{StaticResource OkBrush}"/>
+                                    </DataTrigger>
+                                    <DataTrigger Binding="{Binding ConnectionText}" Value="重连中">
+                                        <Setter Property="Fill" Value="{StaticResource AlarmBrush}"/>
+                                    </DataTrigger>
+                                </Style.Triggers>
+                            </Style>
+                        </Ellipse.Style>
+                    </Ellipse>
+                    <TextBlock Text="{Binding ConnectionText, FallbackValue=未连接}" Style="{StaticResource TopBarText}"/>
+                </StackPanel>
+            </Grid>
+        </Border>
+
+        <Grid Grid.Row="1" Margin="16">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="*"/>
+                <ColumnDefinition Width="360"/>
+            </Grid.ColumnDefinitions>
+
+            <Border Grid.Column="0" Background="#0B0D10" BorderBrush="{StaticResource LineBrush}" BorderThickness="1" Margin="0,0,16,0">
+                <Grid>
+                    <ContentControl Content="{Binding LiveImage}" HorizontalAlignment="Center" VerticalAlignment="Center">
+                        <ContentControl.Resources>
+                            <DataTemplate DataType="{x:Type rt:StubFrame}">
+                                <TextBlock FontSize="36" Foreground="{StaticResource MutedBrush}"
+                                           Text="{Binding Seq, StringFormat=桩图 #{0}}"/>
+                            </DataTemplate>
+                        </ContentControl.Resources>
+                    </ContentControl>
+                    <ContentControl Content="{Binding OverlayImage}" IsHitTestVisible="False"/>
+                    <Border Width="200" Height="72" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="16"
+                            CornerRadius="4" Background="#CC0B0D10">
+                        <TextBlock Text="{Binding BadgeText, FallbackValue=就绪}">
+                            <TextBlock.Style>
+                                <Style TargetType="TextBlock" BasedOn="{StaticResource BadgeText}">
+                                    <Style.Triggers>
+                                        <DataTrigger Binding="{Binding BadgeText}" Value="OK">
+                                            <Setter Property="Foreground" Value="{StaticResource OkBrush}"/>
+                                        </DataTrigger>
+                                        <DataTrigger Binding="{Binding BadgeText}" Value="NG">
+                                            <Setter Property="Foreground" Value="{StaticResource NgBrush}"/>
+                                        </DataTrigger>
+                                        <DataTrigger Binding="{Binding BadgeText}" Value="报警">
+                                            <Setter Property="Foreground" Value="{StaticResource AlarmBrush}"/>
+                                        </DataTrigger>
+                                        <DataTrigger Binding="{Binding BadgeText}" Value="检测中">
+                                            <Setter Property="Foreground" Value="{StaticResource BusyBrush}"/>
+                                        </DataTrigger>
+                                        <DataTrigger Binding="{Binding BadgeText}" Value="断连">
+                                            <Setter Property="Foreground" Value="{StaticResource OfflineBrush}"/>
+                                        </DataTrigger>
+                                    </Style.Triggers>
+                                </Style>
+                            </TextBlock.Style>
+                        </TextBlock>
+                    </Border>
+                </Grid>
+            </Border>
+
+            <Border Grid.Column="1" Background="{StaticResource PanelBrush}" BorderBrush="{StaticResource LineBrush}" BorderThickness="1" Padding="24">
+                <Grid>
+                    <Grid.RowDefinitions>
+                        <RowDefinition Height="Auto"/>
+                        <RowDefinition Height="*"/>
+                        <RowDefinition Height="Auto"/>
+                    </Grid.RowDefinitions>
+                    <TextBlock Grid.Row="0" Text="本拍" Foreground="{StaticResource MutedBrush}" FontSize="18"/>
+                    <TextBlock Grid.Row="1"
+                               Text="{Binding LastResultText, FallbackValue=—}"
+                               Style="{StaticResource ShotText}"
+                               Foreground="{Binding LastResultBrush, Converter={StaticResource HexToBrush}}"
+                               VerticalAlignment="Center"/>
+                    <StackPanel Grid.Row="2">
+                        <TextBlock Style="{StaticResource CountText}">
+                            <Run Text="OK "/><Run Text="{Binding OkCount, FallbackValue=0}"/>
+                        </TextBlock>
+                        <TextBlock Style="{StaticResource CountText}">
+                            <Run Text="NG "/><Run Text="{Binding NgCount, FallbackValue=0}"/>
+                        </TextBlock>
+                        <TextBlock Style="{StaticResource CountText}">
+                            <Run Text="合计 "/><Run Text="{Binding TotalCount, FallbackValue=0}"/>
+                        </TextBlock>
+                    </StackPanel>
+                </Grid>
+            </Border>
+        </Grid>
+
+        <Border Grid.Row="2" Background="{StaticResource PanelBrush}" BorderBrush="{StaticResource LineBrush}" BorderThickness="0,1,0,0" Padding="24,0">
+            <Grid>
+                <TextBlock Text="{Binding AlarmText, FallbackValue=无报警}" Style="{StaticResource AlarmText}"
+                           Foreground="{Binding AlarmBrush, Converter={StaticResource HexToBrush}}"/>
+                <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
+                    <Button Style="{StaticResource StartButton}"
+                            Command="{Binding StartCommand}"
+                            IsEnabled="{Binding CanStart}"
+                            Margin="0,0,16,0"/>
+                    <Button Style="{StaticResource StopButton}"
+                            Command="{Binding StopCommand}"
+                            IsEnabled="{Binding CanStop}"/>
+                </StackPanel>
+            </Grid>
+        </Border>
+    </Grid>
+</Window>
diff --git a/src/VisionHost.App/Views/RunStationView.xaml.cs b/src/VisionHost.App/Views/RunStationView.xaml.cs
new file mode 100644
index 0000000..c7be84f
--- /dev/null
+++ b/src/VisionHost.App/Views/RunStationView.xaml.cs
@@ -0,0 +1,22 @@
+using System.Threading;
+using System.Windows;
+using VisionHost.Runtime;
+
+namespace VisionHost.App.Views;
+
+public partial class RunStationView : Window
+{
+    public RunStationView()
+    {
+        InitializeComponent();
+        var cam = new StubFrameSource();
+        var run = new RunService(
+            cam,
+            cam,
+            new StubInspectService(),
+            new StubPlcIo(),
+            new WpfUserConfirm());
+        DataContext = new RunViewModel(run, new SynchronizationContextDispatch(SynchronizationContext.Current));
+        Closed += (_, _) => (DataContext as RunViewModel)?.Dispose();
+    }
+}
diff --git a/src/VisionHost.App/VisionHost.App.csproj b/src/VisionHost.App/VisionHost.App.csproj
new file mode 100644
index 0000000..d4da8ea
--- /dev/null
+++ b/src/VisionHost.App/VisionHost.App.csproj
@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UseWPF>true</UseWPF>
+    <RootNamespace>VisionHost.App</RootNamespace>
+    <AssemblyName>VisionHost.App</AssemblyName>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\VisionHost.Runtime\VisionHost.Runtime.csproj" />
+    <ProjectReference Include="..\VisionHost.Contracts\VisionHost.Contracts.csproj" />
+  </ItemGroup>
+</Project>
diff --git a/src/VisionHost.App/WpfUserConfirm.cs b/src/VisionHost.App/WpfUserConfirm.cs
new file mode 100644
index 0000000..843cb7b
--- /dev/null
+++ b/src/VisionHost.App/WpfUserConfirm.cs
@@ -0,0 +1,64 @@
+using System.Windows;
+using System.Windows.Controls;
+using VisionHost.Contracts;
+
+namespace VisionHost.App;
+
+public sealed class WpfUserConfirm : IUserConfirm
+{
+    public bool ConfirmStart() => Ask("确认启动检测？");
+    public bool ConfirmStop() => Ask("确认停止检测？");
+
+    private static bool Ask(string message)
+    {
+        var w = new Window
+        {
+            Width = 420,
+            Height = 180,
+            WindowStartupLocation = WindowStartupLocation.CenterOwner,
+            ResizeMode = ResizeMode.NoResize,
+            WindowStyle = WindowStyle.None,
+            Background = (System.Windows.Media.Brush)Application.Current.FindResource("PanelBrush"),
+            Owner = Application.Current.MainWindow
+        };
+        var grid = new Grid { Margin = new Thickness(24) };
+        grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
+        grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
+        var text = new TextBlock
+        {
+            Text = message,
+            FontSize = 20,
+            Foreground = (System.Windows.Media.Brush)Application.Current.FindResource("TextBrush"),
+            TextWrapping = TextWrapping.Wrap,
+            VerticalAlignment = VerticalAlignment.Center
+        };
+        Grid.SetRow(text, 0);
+        var buttons = new StackPanel { Orientation = Orientation.Horizontal, HorizontalAlignment = HorizontalAlignment.Right };
+        var ok = new Button
+        {
+            Content = "确认",
+            Style = (Style)Application.Current.FindResource("RunButton"),
+            Background = (System.Windows.Media.Brush)Application.Current.FindResource("StartBrush"),
+            IsDefault = true,
+            Margin = new Thickness(0, 0, 12, 0)
+        };
+        var cancel = new Button
+        {
+            Content = "取消",
+            Style = (Style)Application.Current.FindResource("RunButton"),
+            Background = (System.Windows.Media.Brush)Application.Current.FindResource("LineBrush"),
+            IsCancel = true
+        };
+        var accepted = false;
+        ok.Click += (_, _) => { accepted = true; w.Close(); };
+        cancel.Click += (_, _) => w.Close();
+        buttons.Children.Add(ok);
+        buttons.Children.Add(cancel);
+        Grid.SetRow(buttons, 1);
+        grid.Children.Add(text);
+        grid.Children.Add(buttons);
+        w.Content = grid;
+        w.ShowDialog();
+        return accepted;
+    }
+}
diff --git a/src/VisionHost.Contracts/DeviceStatusInfo.cs b/src/VisionHost.Contracts/DeviceStatusInfo.cs
new file mode 100644
index 0000000..e6eff3f
--- /dev/null
+++ b/src/VisionHost.Contracts/DeviceStatusInfo.cs
@@ -0,0 +1,13 @@
+
+namespace VisionHost.Contracts;
+
+public enum ConnectionState
+{
+    Disconnected,
+    Connected,
+    Reconnecting
+}
+
+public sealed record DeviceStatusInfo(
+    ConnectionState Connection,
+    string? Detail);
diff --git a/src/VisionHost.Contracts/FrameReadyEvent.cs b/src/VisionHost.Contracts/FrameReadyEvent.cs
new file mode 100644
index 0000000..eba554f
--- /dev/null
+++ b/src/VisionHost.Contracts/FrameReadyEvent.cs
@@ -0,0 +1,7 @@
+
+namespace VisionHost.Contracts;
+
+public sealed record FrameReadyEvent(
+    string CameraId,
+    object Frame,
+    DateTimeOffset Timestamp);
diff --git a/src/VisionHost.Contracts/IDeviceStatus.cs b/src/VisionHost.Contracts/IDeviceStatus.cs
new file mode 100644
index 0000000..3ce997a
--- /dev/null
+++ b/src/VisionHost.Contracts/IDeviceStatus.cs
@@ -0,0 +1,8 @@
+
+namespace VisionHost.Contracts;
+
+public interface IDeviceStatus
+{
+    event Action<DeviceStatusInfo>? Changed;
+    DeviceStatusInfo Current { get; }
+}
diff --git a/src/VisionHost.Contracts/IFrameSource.cs b/src/VisionHost.Contracts/IFrameSource.cs
new file mode 100644
index 0000000..1742adc
--- /dev/null
+++ b/src/VisionHost.Contracts/IFrameSource.cs
@@ -0,0 +1,8 @@
+
+namespace VisionHost.Contracts;
+
+public interface IFrameSource
+{
+    event Action<FrameReadyEvent>? FrameReady;
+    ConnectionState Connection { get; }
+}
diff --git a/src/VisionHost.Contracts/IInspectService.cs b/src/VisionHost.Contracts/IInspectService.cs
new file mode 100644
index 0000000..7c91b6a
--- /dev/null
+++ b/src/VisionHost.Contracts/IInspectService.cs
@@ -0,0 +1,7 @@
+
+namespace VisionHost.Contracts;
+
+public interface IInspectService
+{
+    Task<InspectResult> Inspect(object frameHandle, string recipeId, CancellationToken cancellationToken);
+}
diff --git a/src/VisionHost.Contracts/IPlcIo.cs b/src/VisionHost.Contracts/IPlcIo.cs
new file mode 100644
index 0000000..6235cd8
--- /dev/null
+++ b/src/VisionHost.Contracts/IPlcIo.cs
@@ -0,0 +1,9 @@
+
+namespace VisionHost.Contracts;
+
+public interface IPlcIo
+{
+    event Action<DeviceStatusInfo>? StatusChanged;
+    Task WriteAsync(string tag, object value, TimeSpan timeout, CancellationToken cancellationToken);
+    Task<object?> ReadAsync(string tag, TimeSpan timeout, CancellationToken cancellationToken);
+}
diff --git a/src/VisionHost.Contracts/IUiDispatch.cs b/src/VisionHost.Contracts/IUiDispatch.cs
new file mode 100644
index 0000000..00f4edf
--- /dev/null
+++ b/src/VisionHost.Contracts/IUiDispatch.cs
@@ -0,0 +1,6 @@
+namespace VisionHost.Contracts;
+
+public interface IUiDispatch
+{
+    void Post(Action action);
+}
diff --git a/src/VisionHost.Contracts/IUserConfirm.cs b/src/VisionHost.Contracts/IUserConfirm.cs
new file mode 100644
index 0000000..0c47fbf
--- /dev/null
+++ b/src/VisionHost.Contracts/IUserConfirm.cs
@@ -0,0 +1,8 @@
+
+namespace VisionHost.Contracts;
+
+public interface IUserConfirm
+{
+    bool ConfirmStart();
+    bool ConfirmStop();
+}
diff --git a/src/VisionHost.Contracts/InspectResult.cs b/src/VisionHost.Contracts/InspectResult.cs
new file mode 100644
index 0000000..87ca9f5
--- /dev/null
+++ b/src/VisionHost.Contracts/InspectResult.cs
@@ -0,0 +1,8 @@
+
+namespace VisionHost.Contracts;
+
+public sealed record InspectResult(
+    bool Ok,
+    string? NgCode,
+    int ElapsedMs,
+    object? Overlay);
diff --git a/src/VisionHost.Contracts/RunState.cs b/src/VisionHost.Contracts/RunState.cs
new file mode 100644
index 0000000..5bb4e65
--- /dev/null
+++ b/src/VisionHost.Contracts/RunState.cs
@@ -0,0 +1,12 @@
+
+namespace VisionHost.Contracts;
+
+public enum RunState
+{
+    Idle,
+    Busy,
+    Ok,
+    Ng,
+    Alarm,
+    Disconnected
+}
diff --git a/src/VisionHost.Contracts/RuntimeOptions.cs b/src/VisionHost.Contracts/RuntimeOptions.cs
new file mode 100644
index 0000000..73db635
--- /dev/null
+++ b/src/VisionHost.Contracts/RuntimeOptions.cs
@@ -0,0 +1,11 @@
+
+namespace VisionHost.Contracts;
+
+public sealed class RuntimeOptions
+{
+    public int QueueCapacity { get; set; } = 8;
+    public int InspectTimeoutMs { get; set; } = 2000;
+    public int PlcTimeoutMs { get; set; } = 500;
+    public string RecipeId { get; set; } = "STUB";
+    public string RecipeName { get; set; } = "STUB";
+}
diff --git a/src/VisionHost.Contracts/VisionHost.Contracts.csproj b/src/VisionHost.Contracts/VisionHost.Contracts.csproj
new file mode 100644
index 0000000..ebb7a3a
--- /dev/null
+++ b/src/VisionHost.Contracts/VisionHost.Contracts.csproj
@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <RootNamespace>VisionHost.Contracts</RootNamespace>
+  </PropertyGroup>
+</Project>
diff --git a/src/VisionHost.Runtime/Alarm.cs b/src/VisionHost.Runtime/Alarm.cs
new file mode 100644
index 0000000..1d7a96a
--- /dev/null
+++ b/src/VisionHost.Runtime/Alarm.cs
@@ -0,0 +1,4 @@
+
+namespace VisionHost.Runtime;
+
+public sealed record Alarm(string Text, DateTimeOffset RaisedAt);
diff --git a/src/VisionHost.Runtime/AlwaysConfirm.cs b/src/VisionHost.Runtime/AlwaysConfirm.cs
new file mode 100644
index 0000000..2f07eb6
--- /dev/null
+++ b/src/VisionHost.Runtime/AlwaysConfirm.cs
@@ -0,0 +1,10 @@
+
+using VisionHost.Contracts;
+
+namespace VisionHost.Runtime;
+
+public sealed class AlwaysConfirm : IUserConfirm
+{
+    public bool ConfirmStart() => true;
+    public bool ConfirmStop() => true;
+}
diff --git a/src/VisionHost.Runtime/RunService.cs b/src/VisionHost.Runtime/RunService.cs
new file mode 100644
index 0000000..b25a900
--- /dev/null
+++ b/src/VisionHost.Runtime/RunService.cs
@@ -0,0 +1,314 @@
+
+using System.Collections.Concurrent;
+using VisionHost.Contracts;
+
+namespace VisionHost.Runtime;
+
+public sealed class RunService : IDisposable
+{
+    public const string OkBrush = "#22C55E";
+    public const string NgBrush = "#EF4444";
+    public const string AlarmBrushHex = "#F59E0B";
+    public const string TextBrush = "#F2F4F7";
+    public const string MutedBrush = "#9AA3AF";
+
+    private readonly IFrameSource _frames;
+    private readonly IDeviceStatus _devices;
+    private readonly IInspectService _inspect;
+    private readonly IPlcIo _plc;
+    private readonly IUserConfirm _confirm;
+    private readonly RuntimeOptions _opt;
+    private readonly ConcurrentQueue<FrameReadyEvent> _queue = new();
+    private readonly object _gate = new();
+    private readonly CancellationTokenSource _life = new();
+
+    private bool _running;
+    private bool _busy;
+    private int _ok;
+    private int _ng;
+    private InspectResult? _last;
+    private object? _live;
+    private Alarm? _alarm;
+    private DeviceStatusInfo _device;
+    private CancellationTokenSource? _runCts;
+    private Task? _worker;
+
+    public event Action? Changed;
+
+    public RunService(
+        IFrameSource frames,
+        IDeviceStatus devices,
+        IInspectService inspect,
+        IPlcIo plc,
+        IUserConfirm confirm,
+        RuntimeOptions? options = null)
+    {
+        _frames = frames;
+        _devices = devices;
+        _inspect = inspect;
+        _plc = plc;
+        _confirm = confirm;
+        _opt = options ?? new RuntimeOptions();
+        _device = devices.Current;
+
+        _frames.FrameReady += OnFrame;
+        _devices.Changed += OnDevice;
+        _plc.StatusChanged += OnPlc;
+    }
+
+    public StationSnapshot Snapshot()
+    {
+        lock (_gate)
+        {
+            var state = ComputeState();
+            var lastText = FormatLast(_last);
+            var alarmText = FormatAlarm();
+            var connected = _device.Connection == ConnectionState.Connected;
+            return new StationSnapshot(
+                RunState: state,
+                RecipeName: _opt.RecipeName,
+                ConnectionText: _device.Connection switch
+                {
+                    ConnectionState.Connected => "已连接",
+                    ConnectionState.Reconnecting => "重连中",
+                    _ => "未连接"
+                },
+                LiveImage: _live,
+                OverlayImage: _last?.Overlay,
+                BadgeText: state switch
+                {
+                    RunState.Busy => "检测中",
+                    RunState.Ok => "OK",
+                    RunState.Ng => "NG",
+                    RunState.Alarm => "报警",
+                    RunState.Disconnected => "断连",
+                    _ => "就绪"
+                },
+                LastResultText: lastText,
+                LastResultBrush: lastText.StartsWith("NG", StringComparison.Ordinal) ? NgBrush
+                    : lastText == "OK" ? OkBrush
+                    : TextBrush,
+                OkCount: _ok,
+                NgCount: _ng,
+                TotalCount: _ok + _ng,
+                AlarmText: alarmText,
+                AlarmBrush: alarmText == "无报警" ? MutedBrush : AlarmBrushHex,
+                CanStart: connected && !_running,
+                CanStop: _running,
+                IsRunning: _running);
+        }
+    }
+
+    public bool RequestStart()
+    {
+        lock (_gate)
+        {
+            if (_running) return false;
+            if (_device.Connection != ConnectionState.Connected) return false;
+        }
+
+        if (!_confirm.ConfirmStart()) return false;
+
+        lock (_gate)
+        {
+            if (_running) return false;
+            if (_device.Connection != ConnectionState.Connected) return false;
+            _ok = 0;
+            _ng = 0;
+            _last = null;
+            _alarm = null;
+            _busy = false;
+            _running = true;
+            _runCts = CancellationTokenSource.CreateLinkedTokenSource(_life.Token);
+        }
+
+        if (_frames is StubFrameSource stub)
+            stub.StartGrab();
+
+        _worker = Task.Run(() => PumpAsync(_runCts.Token));
+        Raise();
+        return true;
+    }
+
+    public bool RequestStop()
+    {
+        lock (_gate)
+        {
+            if (!_running) return false;
+        }
+
+        if (!_confirm.ConfirmStop()) return false;
+        StopCore();
+        return true;
+    }
+
+    public void RaiseAlarm(string text)
+    {
+        lock (_gate) _alarm = new Alarm(text, DateTimeOffset.UtcNow);
+        Raise();
+    }
+
+    public void ClearAlarm()
+    {
+        lock (_gate) _alarm = null;
+        Raise();
+    }
+
+    private void StopCore()
+    {
+        CancellationTokenSource? cts;
+        lock (_gate)
+        {
+            if (!_running) return;
+            _running = false;
+            _busy = false;
+            cts = _runCts;
+            _runCts = null;
+        }
+
+        if (_frames is StubFrameSource stub)
+            stub.StopGrab();
+
+        try { cts?.Cancel(); } catch (ObjectDisposedException) { }
+        cts?.Dispose();
+        Raise();
+    }
+
+    private void OnFrame(FrameReadyEvent e)
+    {
+        if (!Snapshot().IsRunning && !_running) return;
+
+        lock (_gate)
+        {
+            if (!_running) return;
+            _live = e.Frame;
+            if (_queue.Count >= _opt.QueueCapacity)
+            {
+                _queue.TryDequeue(out _);
+                _alarm = new Alarm("采集队列已满，已丢最旧帧", DateTimeOffset.UtcNow);
+            }
+            _queue.Enqueue(e);
+        }
+
+        Raise();
+    }
+
+    private void OnDevice(DeviceStatusInfo info)
+    {
+        lock (_gate) _device = info;
+        if (info.Connection != ConnectionState.Connected)
+            StopCore();
+        else
+            Raise();
+    }
+
+    private void OnPlc(DeviceStatusInfo info)
+    {
+        if (info.Connection == ConnectionState.Disconnected)
+            RaiseAlarm(info.Detail ?? "PLC 断连");
+    }
+
+    private async Task PumpAsync(CancellationToken ct)
+    {
+        while (!ct.IsCancellationRequested)
+        {
+            if (!_queue.TryDequeue(out var frame))
+            {
+                try { await Task.Delay(15, ct).ConfigureAwait(false); }
+                catch (OperationCanceledException) { break; }
+                continue;
+            }
+
+            lock (_gate) _busy = true;
+            Raise();
+
+            InspectResult result;
+            try
+            {
+                using var timeout = CancellationTokenSource.CreateLinkedTokenSource(ct);
+                timeout.CancelAfter(_opt.InspectTimeoutMs);
+                result = await _inspect.Inspect(frame.Frame, _opt.RecipeId, timeout.Token).ConfigureAwait(false);
+            }
+            catch (OperationCanceledException) when (!ct.IsCancellationRequested)
+            {
+                result = new InspectResult(false, "TIMEOUT", _opt.InspectTimeoutMs, null);
+                lock (_gate) _alarm = new Alarm("检测超时", DateTimeOffset.UtcNow);
+            }
+            catch (Exception ex)
+            {
+                result = new InspectResult(false, "ERR", 0, null);
+                lock (_gate) _alarm = new Alarm(ex.Message, DateTimeOffset.UtcNow);
+            }
+
+            lock (_gate)
+            {
+                _last = result;
+                _busy = false;
+                if (result.Ok) _ok++;
+                else _ng++;
+            }
+
+            try
+            {
+                await _plc.WriteAsync(
+                    "Result.Ok",
+                    result.Ok,
+                    TimeSpan.FromMilliseconds(_opt.PlcTimeoutMs),
+                    ct).ConfigureAwait(false);
+            }
+            catch (Exception ex)
+            {
+                RaiseAlarm("PLC 写出失败: " + ex.Message);
+            }
+
+            Raise();
+        }
+
+        lock (_gate) _busy = false;
+        Raise();
+    }
+
+    private RunState ComputeState()
+    {
+        if (_device.Connection != ConnectionState.Connected)
+            return RunState.Disconnected;
+        if (_alarm is not null)
+            return RunState.Alarm;
+        if (_busy)
+            return RunState.Busy;
+        if (_last is { Ok: true })
+            return RunState.Ok;
+        if (_last is { Ok: false })
+            return RunState.Ng;
+        return RunState.Idle;
+    }
+
+    private static string FormatLast(InspectResult? r)
+    {
+        if (r is null) return "—";
+        if (r.Ok) return "OK";
+        return string.IsNullOrWhiteSpace(r.NgCode) ? "NG" : "NG " + r.NgCode;
+    }
+
+    private string FormatAlarm()
+    {
+        if (_device.Connection == ConnectionState.Disconnected)
+            return _device.Detail ?? "相机未连接";
+        if (_device.Connection == ConnectionState.Reconnecting)
+            return _device.Detail ?? "相机重连中";
+        return _alarm?.Text ?? "无报警";
+    }
+
+    private void Raise() => Changed?.Invoke();
+
+    public void Dispose()
+    {
+        _frames.FrameReady -= OnFrame;
+        _devices.Changed -= OnDevice;
+        _plc.StatusChanged -= OnPlc;
+        StopCore();
+        _life.Cancel();
+        _life.Dispose();
+        if (_frames is IDisposable d) d.Dispose();
+    }
+}
diff --git a/src/VisionHost.Runtime/RunViewModel.cs b/src/VisionHost.Runtime/RunViewModel.cs
new file mode 100644
index 0000000..5ea4e7c
--- /dev/null
+++ b/src/VisionHost.Runtime/RunViewModel.cs
@@ -0,0 +1,98 @@
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using System.Windows.Input;
+using VisionHost.Contracts;
+
+namespace VisionHost.Runtime;
+
+public sealed class RelayCommand : ICommand
+{
+    private readonly Action _exec;
+    private readonly Func<bool>? _can;
+
+    public RelayCommand(Action exec, Func<bool>? can = null)
+    {
+        _exec = exec;
+        _can = can;
+    }
+
+    public event EventHandler? CanExecuteChanged;
+    public bool CanExecute(object? parameter) => _can?.Invoke() ?? true;
+    public void Execute(object? parameter) => _exec();
+    public void RaiseCanExecuteChanged() => CanExecuteChanged?.Invoke(this, EventArgs.Empty);
+}
+
+public sealed class RunViewModel : INotifyPropertyChanged, IDisposable
+{
+    private readonly RunService _run;
+    private readonly IUiDispatch _ui;
+    private StationSnapshot _s;
+    private int _disposed;
+
+    public RunViewModel(RunService run, IUiDispatch? ui = null)
+    {
+        _run = run;
+        _ui = ui ?? new SynchronizationContextDispatch();
+        _s = run.Snapshot();
+        StartCommand = new RelayCommand(() => _run.RequestStart(), () => CanStart);
+        StopCommand = new RelayCommand(() => _run.RequestStop(), () => CanStop);
+        _run.Changed += OnChanged;
+    }
+
+    public static RunViewModel CreateStub(IUserConfirm? confirm = null, IUiDispatch? ui = null)
+    {
+        var cam = new StubFrameSource();
+        var run = new RunService(
+            cam,
+            cam,
+            new StubInspectService(),
+            new StubPlcIo(),
+            confirm ?? new AlwaysConfirm(),
+            new RuntimeOptions());
+        return new RunViewModel(run, ui);
+    }
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+
+    public ICommand StartCommand { get; }
+    public ICommand StopCommand { get; }
+
+    public RunState RunState => _s.RunState;
+    public string RecipeName => _s.RecipeName;
+    public string ConnectionText => _s.ConnectionText;
+    public object? LiveImage => _s.LiveImage;
+    public object? OverlayImage => _s.OverlayImage;
+    public string BadgeText => _s.BadgeText;
+    public string LastResultText => _s.LastResultText;
+    public string LastResultBrush => _s.LastResultBrush;
+    public int OkCount => _s.OkCount;
+    public int NgCount => _s.NgCount;
+    public int TotalCount => _s.TotalCount;
+    public string AlarmText => _s.AlarmText;
+    public string AlarmBrush => _s.AlarmBrush;
+    public bool CanStart => _s.CanStart;
+    public bool CanStop => _s.CanStop;
+
+    public RunService Service => _run;
+
+    private void OnChanged() => _ui.Post(ApplyOnUi);
+
+    private void ApplyOnUi()
+    {
+        if (Volatile.Read(ref _disposed) != 0) return;
+        _s = _run.Snapshot();
+        OnPropertyChanged(string.Empty);
+        ((RelayCommand)StartCommand).RaiseCanExecuteChanged();
+        ((RelayCommand)StopCommand).RaiseCanExecuteChanged();
+    }
+
+    private void OnPropertyChanged([CallerMemberName] string? name = null)
+        => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
+
+    public void Dispose()
+    {
+        if (Interlocked.Exchange(ref _disposed, 1) != 0) return;
+        _run.Changed -= OnChanged;
+        _run.Dispose();
+    }
+}
diff --git a/src/VisionHost.Runtime/ScriptedConfirm.cs b/src/VisionHost.Runtime/ScriptedConfirm.cs
new file mode 100644
index 0000000..af76587
--- /dev/null
+++ b/src/VisionHost.Runtime/ScriptedConfirm.cs
@@ -0,0 +1,31 @@
+
+using VisionHost.Contracts;
+
+namespace VisionHost.Runtime;
+
+public sealed class ScriptedConfirm : IUserConfirm
+{
+    private readonly Queue<bool> _start;
+    private readonly Queue<bool> _stop;
+
+    public ScriptedConfirm(IEnumerable<bool>? start = null, IEnumerable<bool>? stop = null)
+    {
+        _start = new Queue<bool>(start ?? Array.Empty<bool>());
+        _stop = new Queue<bool>(stop ?? Array.Empty<bool>());
+    }
+
+    public int StartPrompts { get; private set; }
+    public int StopPrompts { get; private set; }
+
+    public bool ConfirmStart()
+    {
+        StartPrompts++;
+        return _start.Count == 0 || _start.Dequeue();
+    }
+
+    public bool ConfirmStop()
+    {
+        StopPrompts++;
+        return _stop.Count == 0 || _stop.Dequeue();
+    }
+}
diff --git a/src/VisionHost.Runtime/StationSnapshot.cs b/src/VisionHost.Runtime/StationSnapshot.cs
new file mode 100644
index 0000000..98a823e
--- /dev/null
+++ b/src/VisionHost.Runtime/StationSnapshot.cs
@@ -0,0 +1,22 @@
+
+using VisionHost.Contracts;
+
+namespace VisionHost.Runtime;
+
+public sealed record StationSnapshot(
+    RunState RunState,
+    string RecipeName,
+    string ConnectionText,
+    object? LiveImage,
+    object? OverlayImage,
+    string BadgeText,
+    string LastResultText,
+    string LastResultBrush,
+    int OkCount,
+    int NgCount,
+    int TotalCount,
+    string AlarmText,
+    string AlarmBrush,
+    bool CanStart,
+    bool CanStop,
+    bool IsRunning);
diff --git a/src/VisionHost.Runtime/StubFrameSource.cs b/src/VisionHost.Runtime/StubFrameSource.cs
new file mode 100644
index 0000000..8163aee
--- /dev/null
+++ b/src/VisionHost.Runtime/StubFrameSource.cs
@@ -0,0 +1,72 @@
+
+using VisionHost.Contracts;
+
+namespace VisionHost.Runtime;
+
+public sealed class StubFrameSource : IFrameSource, IDeviceStatus, IDisposable
+{
+    private readonly object _gate = new();
+    private ConnectionState _connection = ConnectionState.Connected;
+    private Timer? _timer;
+    private int _frameSeq;
+
+    public event Action<FrameReadyEvent>? FrameReady;
+    public event Action<DeviceStatusInfo>? Changed;
+
+    public ConnectionState Connection
+    {
+        get { lock (_gate) return _connection; }
+    }
+
+    public DeviceStatusInfo Current => new(Connection, Detail());
+
+    public void SetConnection(ConnectionState state)
+    {
+        lock (_gate)
+        {
+            if (_connection == state) return;
+            _connection = state;
+            if (state != ConnectionState.Connected)
+                StopGrab();
+        }
+
+        Changed?.Invoke(Current);
+    }
+
+    public void StartGrab(int intervalMs = 200)
+    {
+        lock (_gate)
+        {
+            if (_connection != ConnectionState.Connected) return;
+            _timer?.Dispose();
+            _timer = new Timer(_ => Emit(), null, 0, intervalMs);
+        }
+    }
+
+    public void StopGrab()
+    {
+        lock (_gate)
+        {
+            _timer?.Dispose();
+            _timer = null;
+        }
+    }
+
+    private void Emit()
+    {
+        if (Connection != ConnectionState.Connected) return;
+        var n = Interlocked.Increment(ref _frameSeq);
+        FrameReady?.Invoke(new FrameReadyEvent("CAM0", new StubFrame(n), DateTimeOffset.UtcNow));
+    }
+
+    private string? Detail() => Connection switch
+    {
+        ConnectionState.Disconnected => "相机未连接",
+        ConnectionState.Reconnecting => "相机重连中",
+        _ => null
+    };
+
+    public void Dispose() => StopGrab();
+}
+
+public sealed record StubFrame(int Seq);
diff --git a/src/VisionHost.Runtime/StubInspectService.cs b/src/VisionHost.Runtime/StubInspectService.cs
new file mode 100644
index 0000000..8da663c
--- /dev/null
+++ b/src/VisionHost.Runtime/StubInspectService.cs
@@ -0,0 +1,22 @@
+
+using System.Diagnostics;
+using VisionHost.Contracts;
+
+namespace VisionHost.Runtime;
+
+/// <summary>算法桩：拍号在服务内计，VM 不数拍。1-4 OK，第 5 拍 NG/STUB，循环。</summary>
+public sealed class StubInspectService : IInspectService
+{
+    private int _shot;
+
+    public Task<InspectResult> Inspect(object frameHandle, string recipeId, CancellationToken cancellationToken)
+    {
+        var sw = Stopwatch.StartNew();
+        var n = Interlocked.Increment(ref _shot);
+        var isNg = n % 5 == 0;
+        sw.Stop();
+        return Task.FromResult(isNg
+            ? new InspectResult(false, "STUB", (int)sw.ElapsedMilliseconds, Overlay: null)
+            : new InspectResult(true, null, (int)sw.ElapsedMilliseconds, Overlay: null));
+    }
+}
diff --git a/src/VisionHost.Runtime/StubPlcIo.cs b/src/VisionHost.Runtime/StubPlcIo.cs
new file mode 100644
index 0000000..767298a
--- /dev/null
+++ b/src/VisionHost.Runtime/StubPlcIo.cs
@@ -0,0 +1,15 @@
+
+using VisionHost.Contracts;
+
+namespace VisionHost.Runtime;
+
+public sealed class StubPlcIo : IPlcIo
+{
+    public event Action<DeviceStatusInfo>? StatusChanged;
+
+    public Task WriteAsync(string tag, object value, TimeSpan timeout, CancellationToken cancellationToken)
+        => Task.CompletedTask;
+
+    public Task<object?> ReadAsync(string tag, TimeSpan timeout, CancellationToken cancellationToken)
+        => Task.FromResult<object?>(null);
+}
diff --git a/src/VisionHost.Runtime/SynchronizationContextDispatch.cs b/src/VisionHost.Runtime/SynchronizationContextDispatch.cs
new file mode 100644
index 0000000..df4f651
--- /dev/null
+++ b/src/VisionHost.Runtime/SynchronizationContextDispatch.cs
@@ -0,0 +1,24 @@
+using VisionHost.Contracts;
+
+namespace VisionHost.Runtime;
+
+public sealed class SynchronizationContextDispatch : IUiDispatch
+{
+    private readonly SynchronizationContext? _ctx;
+
+    public SynchronizationContextDispatch(SynchronizationContext? ctx = null)
+    {
+        _ctx = ctx ?? SynchronizationContext.Current;
+    }
+
+    public void Post(Action action)
+    {
+        if (_ctx is null)
+        {
+            action();
+            return;
+        }
+
+        _ctx.Post(_ => action(), null);
+    }
+}
diff --git a/src/VisionHost.Runtime/VisionHost.Runtime.csproj b/src/VisionHost.Runtime/VisionHost.Runtime.csproj
new file mode 100644
index 0000000..d4e633a
--- /dev/null
+++ b/src/VisionHost.Runtime/VisionHost.Runtime.csproj
@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <RootNamespace>VisionHost.Runtime</RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\VisionHost.Contracts\VisionHost.Contracts.csproj" />
+  </ItemGroup>
+</Project>
diff --git a/tests/VisionHost.Runtime.Tests/RunServiceAcceptanceTests.cs b/tests/VisionHost.Runtime.Tests/RunServiceAcceptanceTests.cs
new file mode 100644
index 0000000..b9ec32e
--- /dev/null
+++ b/tests/VisionHost.Runtime.Tests/RunServiceAcceptanceTests.cs
@@ -0,0 +1,220 @@
+
+using VisionHost.Contracts;
+using VisionHost.Runtime;
+using Xunit;
+
+namespace VisionHost.Runtime.Tests;
+
+public sealed class RunServiceAcceptanceTests
+{
+    private static (RunService run, StubFrameSource cam, ScriptedConfirm confirm) New(
+        IEnumerable<bool>? start = null,
+        IEnumerable<bool>? stop = null)
+    {
+        var cam = new StubFrameSource();
+        var confirm = new ScriptedConfirm(start, stop);
+        var run = new RunService(cam, cam, new StubInspectService(), new StubPlcIo(), confirm);
+        return (run, cam, confirm);
+    }
+
+    [Fact]
+    public void Disconnected_StartDisabled_NoConfirm()
+    {
+        var (run, cam, confirm) = New();
+        cam.SetConnection(ConnectionState.Disconnected);
+        var s = run.Snapshot();
+        Assert.Equal(RunState.Disconnected, s.RunState);
+        Assert.Equal("断连", s.BadgeText);
+        Assert.False(s.CanStart);
+        Assert.Equal("未连接", s.ConnectionText);
+        Assert.False(run.RequestStart());
+        Assert.Equal(0, confirm.StartPrompts);
+        run.Dispose();
+    }
+
+    [Fact]
+    public void Reconnecting_StartDisabled_NoConfirm()
+    {
+        var (run, cam, confirm) = New();
+        cam.SetConnection(ConnectionState.Reconnecting);
+        Assert.False(run.Snapshot().CanStart);
+        Assert.False(run.RequestStart());
+        Assert.Equal(0, confirm.StartPrompts);
+        run.Dispose();
+    }
+
+    [Fact]
+    public void Start_CancelKeepsIdle()
+    {
+        var (run, _, confirm) = New(start: new[] { false });
+        Assert.True(run.Snapshot().CanStart);
+        Assert.False(run.RequestStart());
+        Assert.Equal(1, confirm.StartPrompts);
+        Assert.False(run.Snapshot().IsRunning);
+        Assert.Equal(RunState.Idle, run.Snapshot().RunState);
+        run.Dispose();
+    }
+
+    [Fact]
+    public async Task Start_Confirm_ClearsCounts_AndRuns()
+    {
+        var (run, _, _) = New(start: new[] { true }, stop: new[] { true });
+        Assert.True(run.RequestStart());
+        await WaitAsync(() => run.Snapshot().TotalCount >= 1);
+        var mid = run.Snapshot();
+        Assert.True(mid.IsRunning);
+        Assert.True(mid.CanStop);
+        Assert.False(mid.CanStart);
+        Assert.True(run.RequestStop());
+        Assert.True(mid.TotalCount >= 1);
+
+        var confirm2 = new ScriptedConfirm(new[] { true }, new[] { true });
+        run.Dispose();
+        var cam = new StubFrameSource();
+        var run2 = new RunService(cam, cam, new StubInspectService(), new StubPlcIo(), confirm2);
+        Assert.True(run2.RequestStart());
+        Assert.Equal(0, run2.Snapshot().OkCount);
+        Assert.Equal(0, run2.Snapshot().NgCount);
+        run2.Dispose();
+    }
+
+    [Fact]
+    public async Task Stop_CancelKeepsRunning_ConfirmKeepsCounts()
+    {
+        var confirm = new ScriptedConfirm(start: new[] { true }, stop: new[] { false, true });
+        var cam = new StubFrameSource();
+        using var run = new RunService(cam, cam, new StubInspectService(), new StubPlcIo(), confirm);
+        Assert.True(run.RequestStart());
+        await WaitAsync(() => run.Snapshot().TotalCount >= 2);
+        var before = run.Snapshot().TotalCount;
+        Assert.False(run.RequestStop());
+        Assert.True(run.Snapshot().IsRunning);
+        Assert.Equal(1, confirm.StopPrompts);
+        Assert.True(run.RequestStop());
+        var after = run.Snapshot();
+        Assert.False(after.IsRunning);
+        Assert.True(after.TotalCount >= before);
+        Assert.True(after.CanStart);
+        Assert.False(after.CanStop);
+    }
+
+    [Fact]
+    public async Task FifthShot_IsNgStub()
+    {
+        var (run, _, _) = New(start: new[] { true }, stop: new[] { true });
+        run.RequestStart();
+        await WaitAsync(() => run.Snapshot().TotalCount >= 5, 5000);
+        var s = run.Snapshot();
+        Assert.True(s.NgCount >= 1);
+        Assert.Contains(s.LastResultText, new[] { "NG STUB", "OK" });
+        await WaitAsync(() => run.Snapshot().LastResultText == "NG STUB" || run.Snapshot().NgCount >= 1);
+        run.RequestStop();
+        run.Dispose();
+    }
+
+    [Fact]
+    public void LastResult_Dash_WhenNoShot()
+    {
+        var (run, _, _) = New();
+        Assert.Equal("—", run.Snapshot().LastResultText);
+        run.Dispose();
+    }
+
+    [Fact]
+    public void LastResult_NgWithoutCode_IsNgOnly()
+    {
+        var cam = new StubFrameSource();
+        var inspect = new FixedInspect(new InspectResult(false, null, 1, null));
+        using var run = new RunService(cam, cam, inspect, new StubPlcIo(), new AlwaysConfirm());
+        run.RequestStart();
+        cam.GetType(); // keep
+        // inject via queue by starting grab
+        WaitAsync(() => run.Snapshot().TotalCount >= 1).GetAwaiter().GetResult();
+        Assert.Equal("NG", run.Snapshot().LastResultText);
+        run.RequestStop();
+    }
+
+    [Fact]
+    public void Alarm_WhileConnected_CanStopIfRunning()
+    {
+        var (run, _, _) = New(start: new[] { true });
+        run.RequestStart();
+        run.RaiseAlarm("光源异常");
+        var s = run.Snapshot();
+        Assert.Equal(RunState.Alarm, s.RunState);
+        Assert.Equal("报警", s.BadgeText);
+        Assert.Equal("光源异常", s.AlarmText);
+        Assert.True(s.CanStop);
+        run.Dispose();
+    }
+
+    [Fact]
+    public void Disconnect_OverridesAlarm_StartDisabled()
+    {
+        var (run, cam, confirm) = New();
+        run.RaiseAlarm("光源异常");
+        cam.SetConnection(ConnectionState.Disconnected);
+        var s = run.Snapshot();
+        Assert.Equal(RunState.Disconnected, s.RunState);
+        Assert.False(s.CanStart);
+        Assert.False(run.RequestStart());
+        Assert.Equal(0, confirm.StartPrompts);
+        run.Dispose();
+    }
+
+    [Fact]
+    public void Counts_PersistAcrossStop_ResetOnNextStart()
+    {
+        var confirm = new ScriptedConfirm(start: new[] { true, true }, stop: new[] { true });
+        var cam = new StubFrameSource();
+        using var run = new RunService(cam, cam, new StubInspectService(), new StubPlcIo(), confirm);
+        run.RequestStart();
+        WaitAsync(() => run.Snapshot().TotalCount >= 3).GetAwaiter().GetResult();
+        run.RequestStop();
+        var kept = run.Snapshot().TotalCount;
+        Assert.True(kept >= 3);
+        run.RequestStart();
+        Assert.Equal(0, run.Snapshot().TotalCount);
+    }
+
+    private static async Task WaitAsync(Func<bool> pred, int ms = 3000)
+    {
+        var until = DateTime.UtcNow.AddMilliseconds(ms);
+        while (DateTime.UtcNow < until)
+        {
+            if (pred()) return;
+            await Task.Delay(20);
+        }
+        throw new TimeoutException("condition not met");
+    }
+
+    [Fact]
+    public async Task Changed_FromWorker_PostsToUiDispatch()
+    {
+        var ui = new RecordingDispatch();
+        using var vm = RunViewModel.CreateStub(new AlwaysConfirm(), ui);
+        Assert.True(vm.Service.RequestStart());
+        await WaitAsync(() => vm.TotalCount >= 1);
+        Assert.True(ui.PostCount >= 1);
+        vm.Service.RequestStop();
+    }
+
+    private sealed class RecordingDispatch : IUiDispatch
+    {
+        public int PostCount;
+
+        public void Post(Action action)
+        {
+            PostCount++;
+            action();
+        }
+    }
+
+    private sealed class FixedInspect : IInspectService
+    {
+        private readonly InspectResult _r;
+        public FixedInspect(InspectResult r) => _r = r;
+        public Task<InspectResult> Inspect(object frameHandle, string recipeId, CancellationToken cancellationToken)
+            => Task.FromResult(_r);
+    }
+}
diff --git a/tests/VisionHost.Runtime.Tests/VisionHost.Runtime.Tests.csproj b/tests/VisionHost.Runtime.Tests/VisionHost.Runtime.Tests.csproj
new file mode 100644
index 0000000..ff21ce7
--- /dev/null
+++ b/tests/VisionHost.Runtime.Tests/VisionHost.Runtime.Tests.csproj
@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\VisionHost.Runtime\VisionHost.Runtime.csproj" />
+  </ItemGroup>
+</Project>