feat(ui): per-task agent settings in DetailsIsland

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ClaudeDo.Ui/ViewModels/Islands/DetailsIslandViewModel.cs

@@ -3,6 +3,7 @@ using System.Text;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using ClaudeDo.Data;
+using ClaudeDo.Data.Models;
 using ClaudeDo.Data.Repositories;
 using ClaudeDo.Ui.Helpers;
 using ClaudeDo.Ui.Services;
@@ -53,9 +54,32 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase
         OnPropertyChanged(nameof(IsRunning));
         OnPropertyChanged(nameof(IsDone));
         OnPropertyChanged(nameof(IsFailed));
+        OnPropertyChanged(nameof(IsAgentSectionEnabled));
         ShowFailedActions = value == "Failed";
     }
     [ObservableProperty] private string? _model;
+
+    // Agent settings overrides
+    [ObservableProperty] private string _taskModelSelection = "(inherit)";
+    [ObservableProperty] private string _taskSystemPrompt = "";
+    [ObservableProperty] private AgentInfo? _taskSelectedAgent;
+
+    [ObservableProperty] private string _effectiveModelHint = "";
+    [ObservableProperty] private string _effectiveSystemPromptHint = "";
+    [ObservableProperty] private string _effectiveAgentHint = "";
+
+    public System.Collections.ObjectModel.ObservableCollection<string> TaskModelOptions { get; } = new()
+    {
+        "(inherit)", "sonnet", "opus", "haiku",
+    };
+
+    public System.Collections.ObjectModel.ObservableCollection<AgentInfo> TaskAgentOptions { get; } = new();
+
+    private bool _suppressAgentSave;
+    private CancellationTokenSource? _agentSaveCts;
+
+    public bool IsAgentSectionEnabled => !IsRunning;
+
     [ObservableProperty] private string? _worktreePath;
     [ObservableProperty] private string? _worktreeBaseCommit;
     [ObservableProperty] private string? _worktreeStateLabel;
@@ -212,6 +236,67 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase
             Log.Add(new LogLineViewModel { Kind = LogKind.Claude, Text = piece });
     }
 
+    partial void OnTaskModelSelectionChanged(string value) => QueueAgentSave();
+    partial void OnTaskSystemPromptChanged(string value) => QueueAgentSave();
+    partial void OnTaskSelectedAgentChanged(AgentInfo? value) => QueueAgentSave();
+
+    private void QueueAgentSave()
+    {
+        if (_suppressAgentSave || Task is null) return;
+        _agentSaveCts?.Cancel();
+        _agentSaveCts = new CancellationTokenSource();
+        var ct = _agentSaveCts.Token;
+        _ = SaveAgentSettingsAsync(ct);
+    }
+
+    private async System.Threading.Tasks.Task SaveAgentSettingsAsync(CancellationToken ct)
+    {
+        try
+        {
+            await System.Threading.Tasks.Task.Delay(300, ct);
+            if (Task is null) return;
+
+            var model = TaskModelSelection == "(inherit)" ? null : TaskModelSelection;
+            var sp = string.IsNullOrWhiteSpace(TaskSystemPrompt) ? null : TaskSystemPrompt;
+            var ap = TaskSelectedAgent is null || string.IsNullOrWhiteSpace(TaskSelectedAgent.Path)
+                ? null : TaskSelectedAgent.Path;
+
+            await _worker.UpdateTaskAgentSettingsAsync(
+                new ClaudeDo.Ui.Services.UpdateTaskAgentSettingsDto(Task.Id, model, sp, ap));
+        }
+        catch (OperationCanceledException) { }
+        catch { }
+    }
+
+    private async System.Threading.Tasks.Task LoadAgentSettingsAsync(
+        ClaudeDo.Data.Models.TaskEntity entity, CancellationToken ct)
+    {
+        _suppressAgentSave = true;
+        try
+        {
+            TaskAgentOptions.Clear();
+            TaskAgentOptions.Add(new AgentInfo("(inherit)", "", ""));
+            var agents = await _worker.GetAgentsAsync();
+            foreach (var a in agents) TaskAgentOptions.Add(a);
+
+            TaskModelSelection = string.IsNullOrWhiteSpace(entity.Model) ? "(inherit)" : entity.Model!;
+            TaskSystemPrompt = entity.SystemPrompt ?? "";
+            TaskSelectedAgent = string.IsNullOrWhiteSpace(entity.AgentPath)
+                ? TaskAgentOptions[0]
+                : (TaskAgentOptions.FirstOrDefault(a => a.Path == entity.AgentPath) ?? TaskAgentOptions[0]);
+
+            var listCfg = await _worker.GetListConfigAsync(entity.ListId);
+            EffectiveModelHint = string.IsNullOrWhiteSpace(listCfg?.Model) ? "(global default)" : listCfg!.Model!;
+            EffectiveSystemPromptHint = string.IsNullOrWhiteSpace(listCfg?.SystemPrompt) ? "(none)" : listCfg!.SystemPrompt!;
+            EffectiveAgentHint = string.IsNullOrWhiteSpace(listCfg?.AgentPath)
+                ? "(none)" : System.IO.Path.GetFileName(listCfg!.AgentPath!);
+        }
+        finally
+        {
+            _suppressAgentSave = false;
+        }
+    }
+
     public void Bind(TaskRowViewModel? row)
     {
         _loadCts?.Cancel();
@@ -237,6 +322,20 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase
             AgentStatusLabel = "Idle";
             LatestRunSessionId = null;
             ShowFailedActions = false;
+            _suppressAgentSave = true;
+            try
+            {
+                TaskModelSelection = "(inherit)";
+                TaskSystemPrompt = "";
+                TaskSelectedAgent = null;
+            }
+            finally
+            {
+                _suppressAgentSave = false;
+            }
+            EffectiveModelHint = "";
+            EffectiveSystemPromptHint = "";
+            EffectiveAgentHint = "";
             return;
         }
 
@@ -266,6 +365,8 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase
             WorktreeStateLabel = entity.Worktree?.State.ToString();
             BranchLine = entity.Worktree is { } w ? $"{w.BranchName} \u2190 main" : null;
             AgentStatusLabel = entity.Status.ToString();
+            await LoadAgentSettingsAsync(entity, ct);
+            ct.ThrowIfCancellationRequested();
 
             var runRepo = new TaskRunRepository(ctx);
             var latestRun = await runRepo.GetLatestByTaskIdAsync(row.Id, ct);

src/ClaudeDo.Ui/Views/Islands/DetailsIslandView.axaml

@@ -150,6 +150,47 @@
                      LostFocus="NotesLostFocus"/>
           </StackPanel>
 
+          <!-- Agent settings overrides -->
+          <Expander Header="Agent settings (overrides)"
+                    IsExpanded="False"
+                    IsEnabled="{Binding IsAgentSectionEnabled}"
+                    Margin="18,0,18,12">
+            <StackPanel Spacing="8" Margin="0,8,0,0">
+
+              <StackPanel Spacing="2">
+                <TextBlock Text="Model" />
+                <ComboBox ItemsSource="{Binding TaskModelOptions}"
+                          SelectedItem="{Binding TaskModelSelection, Mode=TwoWay}"
+                          MinWidth="160" HorizontalAlignment="Left" />
+                <TextBlock Text="{Binding EffectiveModelHint, StringFormat='Effective if inherited: {0}'}"
+                           Opacity="0.6" FontSize="11" />
+              </StackPanel>
+
+              <StackPanel Spacing="2">
+                <TextBlock Text="System prompt (appended)" />
+                <TextBox Text="{Binding TaskSystemPrompt, Mode=TwoWay}"
+                         AcceptsReturn="True" TextWrapping="Wrap" MinHeight="60"
+                         Watermark="{Binding EffectiveSystemPromptHint}" />
+              </StackPanel>
+
+              <StackPanel Spacing="2">
+                <TextBlock Text="Agent file" />
+                <ComboBox ItemsSource="{Binding TaskAgentOptions}"
+                          SelectedItem="{Binding TaskSelectedAgent, Mode=TwoWay}"
+                          MinWidth="240" HorizontalAlignment="Left">
+                  <ComboBox.ItemTemplate>
+                    <DataTemplate>
+                      <TextBlock Text="{Binding Name}" />
+                    </DataTemplate>
+                  </ComboBox.ItemTemplate>
+                </ComboBox>
+                <TextBlock Text="{Binding EffectiveAgentHint, StringFormat='Effective if inherited: {0}'}"
+                           Opacity="0.6" FontSize="11" />
+              </StackPanel>
+
+            </StackPanel>
+          </Expander>
+
         </StackPanel>
       </ScrollViewer>
     </Grid>