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Merge branch 'main' into copilot/fix-path-traversal-issue

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This commit is contained in:
Jacob Alber
2026-05-14 11:38:58 -04:00
committed by GitHub
Unverified
parent 44bb9e9d1a 3047ad3066
commit ef1e33619a
38 changed files with 2152 additions and 1724 deletions
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dotnet/samples/02-agents/Harness/ConsoleReactiveComponents/TextPanel.cs
+7 -19
View File
@@ -9,42 +9,30 @@ namespace Harness.ConsoleReactiveComponents;
/// </summary>
public record TextPanelProps : ConsoleReactiveProps
{
/// <summary>Gets the items to render in the panel.</summary>
public IReadOnlyList<object> Items { get; init; } = [];
/// <summary>Gets the items to render in the panel. Each item is a pre-rendered
/// console string (may include ANSI escape sequences and newlines).</summary>
public IReadOnlyList<string> Items { get; init; } = [];
}
/// <summary>
/// A component that renders a list of items vertically using a custom render delegate.
/// A component that renders a list of pre-rendered string items vertically.
/// Designed for rendering dynamic items in a non-scroll region that may be
/// re-rendered on each update. If the component's <see cref="ConsoleReactiveComponent.Height"/>
/// exceeds the number of output lines, leftover lines are erased.
/// </summary>
public class TextPanel : ConsoleReactiveComponent<TextPanelProps, ConsoleReactiveState>
{
private readonly Func<object, string> _renderItem;
/// <summary>
/// Initializes a new instance of the <see cref="TextPanel"/> class.
/// </summary>
/// <param name="renderItem">A delegate that renders an item and returns the text to display (may contain newlines).</param>
public TextPanel(Func<object, string> renderItem)
{
this._renderItem = renderItem;
}
/// <summary>
/// Calculates the height (in lines) needed to render all items.
/// </summary>
/// <param name="items">The items to measure.</param>
/// <param name="renderItem">The render delegate to use for measuring.</param>
/// <returns>The total number of lines all items will occupy.</returns>
public static int CalculateHeight(IReadOnlyList<object> items, Func<object, string> renderItem)
public static int CalculateHeight(IReadOnlyList<string> items)
{
int total = 0;
for (int i = 0; i < items.Count; i++)
{
string text = renderItem(items[i]);
total += CountLines(text);
total += CountLines(items[i]);
}
return total;
@@ -57,7 +45,7 @@ public class TextPanel : ConsoleReactiveComponent<TextPanelProps, ConsoleReactiv
for (int i = 0; i < props.Items.Count; i++)
{
string text = this._renderItem(props.Items[i]);
string text = props.Items[i];
string[] lines = text.Split('\n');
int lineCount = CountLines(text);
dotnet/samples/02-agents/Harness/ConsoleReactiveComponents/TextScrollPanel.cs
+6 -10
View File
@@ -9,8 +9,9 @@ namespace Harness.ConsoleReactiveComponents;
/// </summary>
public record TextScrollPanelProps : ConsoleReactiveProps
{
/// <summary>Gets the items to render in the scroll panel.</summary>
public IReadOnlyList<object> Items { get; init; } = [];
/// <summary>Gets the items to render in the scroll panel. Each item is a pre-rendered
/// console string (may include ANSI escape sequences and newlines).</summary>
public IReadOnlyList<string> Items { get; init; } = [];
}
/// <summary>
@@ -20,21 +21,17 @@ public record TextScrollPanelProps : ConsoleReactiveProps
public record TextScrollPanelState(int RenderedCount = 0) : ConsoleReactiveState;
/// <summary>
/// A component that renders items within a scroll area using a custom render delegate.
/// A component that renders pre-rendered string items within a scroll area.
/// All items are considered finalized — only new items since the last render are output.
/// Use <see cref="Reset"/> to force a full re-render.
/// </summary>
public class TextScrollPanel : ConsoleReactiveComponent<TextScrollPanelProps, TextScrollPanelState>
{
private readonly Func<object, string> _renderItem;
/// <summary>
/// Initializes a new instance of the <see cref="TextScrollPanel"/> class.
/// </summary>
/// <param name="renderItem">A delegate that renders a single item and returns the text to display (may contain newlines).</param>
public TextScrollPanel(Func<object, string> renderItem)
public TextScrollPanel()
{
this._renderItem = renderItem;
this.State = new TextScrollPanelState();
}
@@ -60,8 +57,7 @@ public class TextScrollPanel : ConsoleReactiveComponent<TextScrollPanelProps, Te
// Output only new items since last rendered
for (int i = state.RenderedCount; i < props.Items.Count; i++)
{
string text = this._renderItem(props.Items[i]);
Console.Write(text);
Console.Write(props.Items[i]);
}
// Update state to track what we've rendered
dotnet/samples/02-agents/Harness/Harness_ConsoleSandbox/AppComponent.cs
-315
View File
@@ -1,315 +0,0 @@
// Copyright (c) Microsoft. All rights reserved.
using Harness.ConsoleReactiveComponents;
using Harness.ConsoleReactiveFramework;
namespace Harness.ConsoleSandbox;
/// <summary>
/// Determines which component is shown in the bottom panel.
/// </summary>
public enum BottomPanelMode
{
/// <summary>Show the list selection component.</summary>
ListSelection,
/// <summary>Show the text input component.</summary>
TextInput
}
public record AppComponentProps : ConsoleReactiveProps
{
public IReadOnlyList<string> Items { get; init; } = Array.Empty<string>();
public IReadOnlyList<object> ScrollItems { get; init; } = [];
/// <summary>Gets the bottom panel mode.</summary>
public BottomPanelMode Mode { get; init; } = BottomPanelMode.ListSelection;
/// <summary>Gets the prompt string for text input mode.</summary>
public string Prompt { get; init; } = "> ";
/// <summary>Gets the placeholder text shown when the input is empty.</summary>
public string Placeholder { get; init; } = "";
/// <summary>Gets the highlight color for the active list item. Defaults to <see cref="ConsoleColor.Cyan"/>.</summary>
public ConsoleColor ListHighlightColor { get; init; } = ConsoleColor.Cyan;
/// <summary>Gets the placeholder text for the custom text input option in the list. If <c>null</c>, no custom option is shown.</summary>
public string? ListCustomTextPlaceholder { get; init; }
/// <summary>Gets the foreground color for the rule borders. If <c>null</c>, uses the default terminal color.</summary>
public ConsoleColor? RuleColor { get; init; }
}
/// <summary>
/// Internal state for the <see cref="AppComponent"/>.
/// </summary>
public record AppComponentState : ConsoleReactiveState
{
/// <summary>Gets the selected index in list selection mode.</summary>
public int SelectedIndex { get; init; }
/// <summary>Gets the current input text being typed in text input mode.</summary>
public string InputText { get; init; } = "";
/// <summary>Gets the current text being typed into the list's custom text option.</summary>
public string ListInputText { get; init; } = "";
}
public class AppComponent : ConsoleReactiveComponent<AppComponentProps, AppComponentState>
{
private readonly TopBottomRule _rule = new();
private readonly ListSelection _listSelection = new();
private readonly TextInput _textInput = new();
private readonly TextScrollPanel _textScrollPanel;
private readonly TextPanel _textPanel;
private readonly Func<object, string> _renderItem;
private readonly Action<string> _onTextInputSubmit;
private readonly Action<string> _onListInputSubmit;
private bool _resizedSinceLastRender;
private int _lastScrollBottom;
/// <summary>
/// Initializes a new instance of the <see cref="AppComponent"/> class.
/// </summary>
/// <param name="renderScrollItem">A delegate that renders a single scroll panel item and returns the text to display.</param>
/// <param name="onTextInputSubmit">A callback invoked with the input text when the user presses Enter in text input mode.</param>
/// <param name="onListInputSubmit">A callback invoked with the selected or typed text when the user presses Enter in list selection mode.</param>
public AppComponent(Func<object, string> renderScrollItem, Action<string> onTextInputSubmit, Action<string> onListInputSubmit)
{
this._renderItem = renderScrollItem;
this._onTextInputSubmit = onTextInputSubmit;
this._onListInputSubmit = onListInputSubmit;
this._textScrollPanel = new TextScrollPanel(renderScrollItem);
this._textPanel = new TextPanel(renderScrollItem);
this.State = new AppComponentState();
KeyEventListener.Instance.KeyPressed += this.OnKeyPressed;
ConsoleResizeListener.Instance.ConsoleResized += this.OnConsoleResized;
}
private void OnKeyPressed(object? sender, KeyPressEventArgs e)
{
if (this.Props!.Mode == BottomPanelMode.TextInput)
{
this.HandleTextInputKey(e);
}
else
{
this.HandleListSelectionKey(e);
}
}
private void HandleTextInputKey(KeyPressEventArgs e)
{
if (e.KeyInfo.Key == ConsoleKey.Enter)
{
string text = this.State!.InputText;
this.SetState(this.State with { InputText = "" });
this._onTextInputSubmit(text);
}
else if (e.KeyInfo.Key == ConsoleKey.Backspace)
{
if (this.State!.InputText.Length > 0)
{
this.SetState(this.State with { InputText = this.State.InputText[..^1] });
}
}
else if (e.KeyInfo.KeyChar != '\0' && !char.IsControl(e.KeyInfo.KeyChar))
{
this.SetState(this.State! with { InputText = this.State.InputText + e.KeyInfo.KeyChar });
}
}
private void HandleListSelectionKey(KeyPressEventArgs e)
{
int maxIndex = this.Props!.Items.Count - 1;
if (this.Props.ListCustomTextPlaceholder != null)
{
maxIndex = this.Props.Items.Count; // extra option at the end
}
bool isOnCustomTextOption = this.Props.ListCustomTextPlaceholder != null
&& this.State!.SelectedIndex == this.Props.Items.Count;
if (e.KeyInfo.Key == ConsoleKey.UpArrow)
{
this.SetState(this.State! with { SelectedIndex = Math.Max(0, this.State.SelectedIndex - 1) });
}
else if (e.KeyInfo.Key == ConsoleKey.DownArrow)
{
this.SetState(this.State! with { SelectedIndex = Math.Min(maxIndex, this.State.SelectedIndex + 1) });
}
else if (e.KeyInfo.Key == ConsoleKey.Enter)
{
if (isOnCustomTextOption)
{
string text = this.State!.ListInputText;
this.SetState(this.State with { ListInputText = "" });
this._onListInputSubmit(text);
}
else
{
this._onListInputSubmit(this.Props.Items[this.State!.SelectedIndex]);
}
}
else if (isOnCustomTextOption)
{
// Typing only works when on the custom text option
if (e.KeyInfo.Key == ConsoleKey.Backspace)
{
if (this.State!.ListInputText.Length > 0)
{
this.SetState(this.State with { ListInputText = this.State.ListInputText[..^1] });
}
}
else if (e.KeyInfo.KeyChar != '\0' && !char.IsControl(e.KeyInfo.KeyChar))
{
this.SetState(this.State! with { ListInputText = this.State.ListInputText + e.KeyInfo.KeyChar });
}
}
}
private void OnConsoleResized(object? sender, ConsoleResizeEventArgs e)
{
this._resizedSinceLastRender = true;
this.Render();
}
public override void RenderCore(AppComponentProps props, AppComponentState state)
{
// Determine the text panel height for the last scroll item
object? lastItem = props.ScrollItems.Count > 0 ? props.ScrollItems[^1] : null;
IReadOnlyList<object> lastItems = lastItem != null ? [lastItem] : [];
int textPanelHeight = TextPanel.CalculateHeight(lastItems, this._renderItem);
if (textPanelHeight > 0)
{
textPanelHeight++; // Extra line for spacing between text panel and rule
}
// Build the bottom panel child based on mode
ConsoleReactiveComponent bottomChild;
int bottomChildHeight;
if (props.Mode == BottomPanelMode.TextInput)
{
var textInputProps = new TextInputProps
{
Prompt = props.Prompt,
Text = state.InputText,
Placeholder = props.Placeholder
};
bottomChildHeight = TextInput.CalculateHeight(textInputProps, Console.WindowWidth);
this._textInput.Width = Console.WindowWidth;
this._textInput.Height = bottomChildHeight;
this._textInput.Props = textInputProps;
bottomChild = this._textInput;
}
else
{
var listProps = new ListSelectionProps
{
Items = props.Items,
SelectedIndex = state.SelectedIndex,
HighlightColor = props.ListHighlightColor,
CustomTextPlaceholder = props.ListCustomTextPlaceholder,
CustomText = state.ListInputText
};
bottomChildHeight = ListSelection.CalculateHeight(listProps);
this._listSelection.Height = bottomChildHeight;
this._listSelection.Props = listProps;
bottomChild = this._listSelection;
}
var ruleProps = new TopBottomRuleProps
{
Width = Console.WindowWidth,
Color = props.RuleColor,
Children = [bottomChild]
};
int ruleHeight = TopBottomRule.CalculateHeight(ruleProps);
int scrollBottom = Console.WindowHeight - ruleHeight - textPanelHeight;
// If scroll region changed or a clear is needed, reset everything
if (this._resizedSinceLastRender || (this._lastScrollBottom != 0 && scrollBottom != this._lastScrollBottom))
{
Console.Write(AnsiEscapes.EraseEntireScreen);
Console.Write(AnsiEscapes.EraseScrollbackBuffer);
this._textScrollPanel.Reset();
this._resizedSinceLastRender = false;
}
this._lastScrollBottom = scrollBottom;
Console.Write(AnsiEscapes.SetScrollRegion(scrollBottom));
// Render text scroll panel in the scroll area (all items except the last)
IReadOnlyList<object> scrollItems = props.ScrollItems.Count > 1
? props.ScrollItems.Take(props.ScrollItems.Count - 1).ToList()
: [];
this._textScrollPanel.X = 1;
this._textScrollPanel.Y = 1;
this._textScrollPanel.Width = Console.WindowWidth;
this._textScrollPanel.Height = scrollBottom;
this._textScrollPanel.Props = new TextScrollPanelProps
{
Items = scrollItems
};
this._textScrollPanel.Render();
// Render the text panel for the last (dynamic) item just below the scroll region
this._textPanel.X = 1;
this._textPanel.Y = scrollBottom + 1;
this._textPanel.Width = Console.WindowWidth;
this._textPanel.Height = textPanelHeight;
this._textPanel.Props = new TextPanelProps
{
Items = lastItems,
};
this._textPanel.Render();
// Render the bottom rule + child below the text panel
this._rule.X = 1;
this._rule.Y = scrollBottom + textPanelHeight + 1;
this._rule.Props = ruleProps;
this._rule.Render();
// Position cursor for natural typing appearance
if (props.Mode == BottomPanelMode.TextInput)
{
int promptLength = props.Prompt.Length;
int textWidth = Console.WindowWidth - promptLength;
int textLength = state.InputText.Length;
// The TextInput starts at rule.Y + 1 (first row inside the rule)
int textInputY = this._rule.Y + 1;
if (textWidth <= 0 || textLength == 0)
{
// Cursor right after the prompt
Console.Write(AnsiEscapes.MoveCursor(textInputY, promptLength + 1));
}
else
{
// Calculate which row and column the cursor lands on
int cursorRow = textLength < textWidth ? 0 : 1 + ((textLength - textWidth) / textWidth);
int cursorCol = textLength < textWidth ? textLength : (textLength - textWidth) % textWidth;
Console.Write(AnsiEscapes.MoveCursor(textInputY + cursorRow, promptLength + cursorCol + 1));
}
}
else if (props.Mode == BottomPanelMode.ListSelection
&& props.ListCustomTextPlaceholder != null
&& state.SelectedIndex == props.Items.Count)
{
// Cursor after the typed text in the custom text option
// The custom text option is at rule.Y + 1 + Items.Count (0-based row inside rule)
int customOptionY = this._rule.Y + 1 + props.Items.Count;
// "> " prefix is 2 chars, then the typed text
int cursorCol = 2 + state.ListInputText.Length + 1;
Console.Write(AnsiEscapes.MoveCursor(customOptionY, cursorCol));
}
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Commands/CommandHandler.cs
+2 -2
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@@ -23,7 +23,7 @@ public abstract class CommandHandler
/// </summary>
/// <param name="input">The raw user input string.</param>
/// <param name="session">The current agent session.</param>
/// <param name="ux">The UX container for rendering output.</param>
/// <param name="ux">The UX state driver for rendering output.</param>
/// <returns><see langword="true"/> if this handler handled the input; <see langword="false"/> otherwise.</returns>
public abstract ValueTask<bool> TryHandleAsync(string input, AgentSession session, HarnessUXContainer ux);
public abstract ValueTask<bool> TryHandleAsync(string input, AgentSession session, IUXStateDriver ux);
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Commands/ExitCommandHandler.cs
+26
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@@ -0,0 +1,26 @@
// Copyright (c) Microsoft. All rights reserved.
using Microsoft.Agents.AI;
namespace Harness.Shared.Console.Commands;
/// <summary>
/// Handles the <c>/exit</c> command to shut down the console application.
/// </summary>
public sealed class ExitCommandHandler : CommandHandler
{
/// <inheritdoc/>
public override string? GetHelpText() => "/exit (quit)";
/// <inheritdoc/>
public override ValueTask<bool> TryHandleAsync(string input, AgentSession session, IUXStateDriver ux)
{
if (!input.Equals("/exit", StringComparison.OrdinalIgnoreCase))
{
return new ValueTask<bool>(false);
}
ux.RequestShutdown();
return new ValueTask<bool>(true);
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Commands/ModeCommandHandler.cs
+2 -2
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@@ -7,7 +7,7 @@ namespace Harness.Shared.Console.Commands;
/// <summary>
/// Handles the <c>/mode</c> command to display or switch the current agent mode.
/// </summary>
internal sealed class ModeCommandHandler : CommandHandler
public sealed class ModeCommandHandler : CommandHandler
{
private readonly AgentModeProvider? _modeProvider;
private readonly IReadOnlyDictionary<string, ConsoleColor>? _modeColors;
@@ -27,7 +27,7 @@ internal sealed class ModeCommandHandler : CommandHandler
public override string? GetHelpText() => this._modeProvider is not null ? "/mode [plan|execute] (show or switch mode)" : null;
/// <inheritdoc/>
public override async ValueTask<bool> TryHandleAsync(string input, AgentSession session, HarnessUXContainer ux)
public override async ValueTask<bool> TryHandleAsync(string input, AgentSession session, IUXStateDriver ux)
{
if (!input.StartsWith("/mode ", StringComparison.OrdinalIgnoreCase) && !input.Equals("/mode", StringComparison.OrdinalIgnoreCase))
{
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Commands/TodoCommandHandler.cs
+2 -2
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@@ -7,7 +7,7 @@ namespace Harness.Shared.Console.Commands;
/// <summary>
/// Handles the <c>/todos</c> command to display the current todo list.
/// </summary>
internal sealed class TodoCommandHandler : CommandHandler
public sealed class TodoCommandHandler : CommandHandler
{
private readonly TodoProvider? _todoProvider;
@@ -24,7 +24,7 @@ internal sealed class TodoCommandHandler : CommandHandler
public override string? GetHelpText() => this._todoProvider is not null ? "/todos (show todo list)" : null;
/// <inheritdoc/>
public override async ValueTask<bool> TryHandleAsync(string input, AgentSession session, HarnessUXContainer ux)
public override async ValueTask<bool> TryHandleAsync(string input, AgentSession session, IUXStateDriver ux)
{
if (!input.Equals("/todos", StringComparison.OrdinalIgnoreCase))
{
dotnet/samples/02-agents/Harness/Harness_Shared_Console/FollowUpAction.cs
+59
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@@ -0,0 +1,59 @@
// Copyright (c) Microsoft. All rights reserved.
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console;
/// <summary>
/// Represents an action returned by an observer at the end of an agent turn.
/// Subtypes describe either a question to ask the user (<see cref="FollowUpQuestion"/>)
/// or a message to add directly to the next agent input (<see cref="FollowUpMessage"/>).
/// </summary>
public abstract record FollowUpAction;
/// <summary>
/// Represents a question that should be presented to the user. The
/// <see cref="Continuation"/> delegate is invoked with the user's answer and the
/// UX state driver, and returns an optional <see cref="ChatMessage"/> to add to the
/// next agent invocation.
/// </summary>
/// <param name="Prompt">The question text shown to the user.</param>
/// <param name="Continuation">
/// Invoked with the user's answer and the UX state driver. The driver lets the
/// continuation write output (e.g., an action label like "Approved") in addition
/// to producing an optional <see cref="ChatMessage"/> for the next agent invocation.
/// </param>
public abstract record FollowUpQuestion(
string Prompt,
Func<string, IUXStateDriver, Task<ChatMessage?>> Continuation) : FollowUpAction;
/// <summary>
/// A free-form text question. The user may type any response.
/// </summary>
/// <param name="Prompt">The question text shown to the user.</param>
/// <param name="Continuation">Continuation that builds the response message.</param>
public sealed record TextFollowUpQuestion(
string Prompt,
Func<string, IUXStateDriver, Task<ChatMessage?>> Continuation)
: FollowUpQuestion(Prompt, Continuation);
/// <summary>
/// A choice question. The user picks from <paramref name="Choices"/>, optionally with
/// the ability to enter custom text when <paramref name="AllowCustomText"/> is true.
/// </summary>
/// <param name="Prompt">The question text shown to the user.</param>
/// <param name="Choices">The list of pre-defined choices.</param>
/// <param name="AllowCustomText">If true, the user may type a custom response in addition to the listed choices.</param>
/// <param name="Continuation">Continuation that builds the response message.</param>
public sealed record ChoiceFollowUpQuestion(
string Prompt,
IReadOnlyList<string> Choices,
bool AllowCustomText,
Func<string, IUXStateDriver, Task<ChatMessage?>> Continuation)
: FollowUpQuestion(Prompt, Continuation);
/// <summary>
/// A message to add directly to the next agent invocation without prompting the user.
/// </summary>
/// <param name="Message">The chat message to add.</param>
public sealed record FollowUpMessage(ChatMessage Message) : FollowUpAction;
dotnet/samples/02-agents/Harness/Harness_Shared_Console/HarnessAgentRunner.cs
+279
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@@ -0,0 +1,279 @@
// Copyright (c) Microsoft. All rights reserved.
using Harness.Shared.Console.Commands;
using Harness.Shared.Console.Observers;
using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console;
/// <summary>
/// Orchestrates agent invocations driven by user-input events from the UI.
/// The component invokes the runner's input handlers (<see cref="OnUserInputAsync"/>,
/// <see cref="OnStreamingInputAsync"/>, <see cref="StartAgentTurnAsync"/>) directly;
/// the runner mutates UI state through the supplied <see cref="IUXStateDriver"/>.
/// All per-turn follow-up state (pending questions and accumulated responses) lives
/// in the component's state record — the runner reads/writes it exclusively through
/// the driver and holds no per-turn fields itself.
/// </summary>
public sealed class HarnessAgentRunner : IDisposable
{
private readonly AIAgent _agent;
private readonly AgentSession _session;
private readonly AgentModeProvider? _modeProvider;
private readonly MessageInjectingChatClient? _messageInjector;
private readonly IReadOnlyList<CommandHandler> _commandHandlers;
private readonly IReadOnlyList<ConsoleObserver> _observers;
private readonly IUXStateDriver _ux;
private readonly SemaphoreSlim _inputGate = new(1, 1);
/// <summary>
/// Initializes a new instance of the <see cref="HarnessAgentRunner"/> class.
/// </summary>
public HarnessAgentRunner(
AIAgent agent,
AgentSession session,
AgentModeProvider? modeProvider,
MessageInjectingChatClient? messageInjector,
IReadOnlyList<CommandHandler> commandHandlers,
IReadOnlyList<ConsoleObserver> observers,
IUXStateDriver ux)
{
this._agent = agent;
this._session = session;
this._modeProvider = modeProvider;
this._messageInjector = messageInjector;
this._commandHandlers = commandHandlers;
this._observers = observers;
this._ux = ux;
this.HelpText = string.Join(
", ",
commandHandlers
.Select(h => h.GetHelpText())
.Where(t => t is not null)!);
}
/// <summary>
/// Gets the help text describing all available commands (joined by ", "), suitable
/// for display in the mode-and-help bar. Computed from the supplied
/// <c>commandHandlers</c>.
/// </summary>
public string HelpText { get; }
/// <inheritdoc/>
public void Dispose() => this._inputGate.Dispose();
/// <summary>
/// Handles a top-level user input submission (TextInput mode, no pending question).
/// Dispatches to command handlers, or starts an agent turn.
/// </summary>
internal async Task OnUserInputAsync(string text)
{
await this._inputGate.WaitAsync().ConfigureAwait(false);
try
{
this._ux.WriteUserInputEcho(text);
foreach (var handler in this._commandHandlers)
{
if (await handler.TryHandleAsync(text, this._session, this._ux).ConfigureAwait(false))
{
this._ux.CurrentMode = this._modeProvider?.GetMode(this._session);
return;
}
}
await this.RunAgentLoopAsync([new ChatMessage(ChatRole.User, text)]).ConfigureAwait(false);
}
finally
{
this._inputGate.Release();
}
}
/// <summary>
/// Handles a user input submission while an agent turn is streaming. The text is
/// enqueued via the <see cref="MessageInjectingChatClient"/> so it can be picked up
/// by the agent on its next opportunity.
/// </summary>
internal Task OnStreamingInputAsync(string text)
{
if (this._messageInjector is null)
{
return Task.CompletedTask;
}
this._messageInjector.EnqueueMessages(this._session, [new ChatMessage(ChatRole.User, text)]);
this._ux.SetQueuedMessages(this._messageInjector.GetPendingMessages(this._session));
return Task.CompletedTask;
}
/// <summary>
/// Resumes (or completes) a turn after the user has answered all pending follow-up
/// questions. The component invokes this with the messages drained from
/// <see cref="IUXStateDriver.TakeFollowUpResponses"/>; an empty list simply ends
/// the streaming display state without invoking the agent.
/// </summary>
internal async Task StartAgentTurnAsync(IList<ChatMessage> messages)
{
await this._inputGate.WaitAsync().ConfigureAwait(false);
try
{
if (messages.Count == 0)
{
this.CompleteTurn();
return;
}
await this.RunAgentLoopAsync(messages).ConfigureAwait(false);
}
finally
{
this._inputGate.Release();
}
}
private async Task RunAgentLoopAsync(IList<ChatMessage> messages)
{
IList<ChatMessage>? nextMessages = messages;
IReadOnlyList<ChatMessage> lastPendingMessages = this._messageInjector?.GetPendingMessages(this._session) ?? [];
while (nextMessages is not null)
{
var runOptions = new AgentRunOptions();
foreach (var observer in this._observers)
{
observer.ConfigureRunOptions(runOptions, this._agent, this._session);
}
this._ux.CurrentMode = this._modeProvider?.GetMode(this._session);
this._ux.BeginStreaming();
this._ux.BeginStreamingOutput();
try
{
await foreach (var update in this._agent.RunStreamingAsync(nextMessages, this._session, runOptions))
{
if (this._modeProvider is not null)
{
string currentMode = this._modeProvider.GetMode(this._session);
if (currentMode != this._ux.CurrentMode)
{
this._ux.CurrentMode = currentMode;
}
}
foreach (var content in update.Contents)
{
foreach (var observer in this._observers)
{
await observer.OnContentAsync(this._ux, content, this._agent, this._session).ConfigureAwait(false);
}
}
if (!string.IsNullOrEmpty(update.Text))
{
foreach (var observer in this._observers)
{
await observer.OnTextAsync(this._ux, update.Text, this._agent, this._session).ConfigureAwait(false);
}
}
this.SyncQueuedMessageDisplay(ref lastPendingMessages);
}
}
catch (Exception ex)
{
await this._ux.WriteInfoLineAsync($"❌ Stream error: {ex.GetType().Name}:\n{ex}", ConsoleColor.Red).ConfigureAwait(false);
}
// Final sync after streaming.
this.SyncQueuedMessageDisplay(ref lastPendingMessages);
this._ux.StopSpinner();
await this._ux.EndStreamingOutputAsync().ConfigureAwait(false);
// Collect FollowUpActions from each observer.
var directMessages = new List<ChatMessage>();
var questions = new List<FollowUpQuestion>();
foreach (var observer in this._observers)
{
var actions = await observer.OnStreamCompleteAsync(this._ux, this._agent, this._session).ConfigureAwait(false);
if (actions is null)
{
continue;
}
foreach (var action in actions)
{
switch (action)
{
case FollowUpMessage msg:
directMessages.Add(msg.Message);
break;
case FollowUpQuestion q:
questions.Add(q);
break;
}
}
}
bool hasFollowUpActions = directMessages.Count > 0 || questions.Count > 0;
await this._ux.WriteNoTextWarningAsync(hasFollowUpActions).ConfigureAwait(false);
// Add any direct messages to the accumulator regardless of whether questions follow —
// they're sent on the next agent invocation, either by us (if no questions) or by
// the component (after the user finishes answering, via StartAgentTurnAsync).
foreach (var msg in directMessages)
{
this._ux.AddFollowUpResponse(msg);
}
if (questions.Count > 0)
{
// Pause: hand control back to the UX to collect answers.
this._ux.QueueFollowUpQuestions(questions);
return;
}
// No questions to ask — drain anything we just accumulated and loop with it.
IReadOnlyList<ChatMessage> drained = this._ux.TakeFollowUpResponses();
nextMessages = drained.Count > 0 ? [.. drained] : null;
}
this.CompleteTurn();
}
private void CompleteTurn()
{
this._ux.EndStreaming();
this._ux.CurrentMode = this._modeProvider?.GetMode(this._session);
}
/// <summary>
/// Synchronizes the queued items display with the message injector's pending messages.
/// Messages that have been consumed (drained by the service) are echoed to the output
/// area as regular user-input entries.
/// </summary>
private void SyncQueuedMessageDisplay(ref IReadOnlyList<ChatMessage> lastPendingMessages)
{
if (this._messageInjector is null)
{
return;
}
var pending = this._messageInjector.GetPendingMessages(this._session);
int consumedCount = lastPendingMessages.Count - pending.Count;
for (int i = 0; i < consumedCount && i < lastPendingMessages.Count; i++)
{
string text = lastPendingMessages[i].Text ?? string.Empty;
this._ux.WriteUserInputEcho(text);
}
lastPendingMessages = pending;
this._ux.SetQueuedMessages(pending);
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/HarnessAppComponent.cs
+234 -216
View File
@@ -3,171 +3,89 @@
using Harness.ConsoleReactiveComponents;
using Harness.ConsoleReactiveFramework;
using Harness.Shared.Console.Components;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console;
/// <summary>
/// Determines which component is shown in the bottom panel.
/// </summary>
public enum BottomPanelMode
{
/// <summary>Show the text input component for user input.</summary>
TextInput,
/// <summary>Show the list selection component for interactive prompts.</summary>
ListSelection,
/// <summary>Show a disabled input indicator during agent streaming.</summary>
Streaming,
}
/// <summary>
/// Event arguments for the <see cref="HarnessAppComponent.InputSubmitted"/> event.
/// </summary>
public sealed class InputSubmittedEventArgs : EventArgs
{
/// <summary>
/// Initializes a new instance of the <see cref="InputSubmittedEventArgs"/> class.
/// </summary>
/// <param name="text">The submitted text.</param>
/// <param name="mode">The bottom panel mode in which the input was submitted.</param>
public InputSubmittedEventArgs(string text, BottomPanelMode mode)
{
this.Text = text;
this.Mode = mode;
}
/// <summary>Gets the submitted text.</summary>
public string Text { get; }
/// <summary>Gets the bottom panel mode in which the input was submitted.</summary>
public BottomPanelMode Mode { get; }
}
/// <summary>
/// Props for <see cref="HarnessAppComponent"/>.
/// </summary>
public record HarnessAppComponentProps : ConsoleReactiveProps
{
/// <summary>Gets or sets the list selection choices (for ListSelection mode).</summary>
public IReadOnlyList<string> Items { get; set; } = Array.Empty<string>();
/// <summary>Gets or sets the scroll items (output entries) to render in the scroll panel.</summary>
public IReadOnlyList<object> ScrollItems { get; set; } = [];
/// <summary>Gets or sets the bottom panel mode.</summary>
public BottomPanelMode Mode { get; set; } = BottomPanelMode.TextInput;
/// <summary>Gets or sets the prompt string for text input mode.</summary>
public string Prompt { get; set; } = "You: ";
/// <summary>Gets or sets the placeholder text shown when the input is empty.</summary>
public string Placeholder { get; set; } = "";
/// <summary>Gets or sets the highlight color for the active list item.</summary>
public ConsoleColor ListHighlightColor { get; set; } = ConsoleColor.Cyan;
/// <summary>Gets or sets the placeholder text for the custom text input option in the list.</summary>
public string? ListCustomTextPlaceholder { get; set; }
/// <summary>Gets or sets the foreground color for the rule borders and mode label.</summary>
public ConsoleColor? ModeColor { get; set; }
/// <summary>Gets or sets the current mode name displayed below the bottom rule (e.g. "plan").</summary>
public string? ModeText { get; set; }
/// <summary>Gets or sets the help text displayed below the bottom rule (available commands).</summary>
public string? HelpText { get; set; }
/// <summary>Gets or sets the title text displayed above the list selection (for interactive prompts).</summary>
public string? ListTitle { get; set; }
/// <summary>Gets or sets a value indicating whether input is enabled during streaming.</summary>
public bool InputEnabled { get; set; }
/// <summary>Gets or sets the prompt to show during streaming when input is disabled.</summary>
public string StreamingPrompt { get; set; } = "(agent is running...)";
/// <summary>Gets or sets a value indicating whether the agent status spinner is visible.</summary>
public bool ShowSpinner { get; set; }
/// <summary>Gets or sets the formatted token usage text to display in the status bar.</summary>
public string? UsageText { get; set; }
/// <summary>Gets or sets the queued input items to display above the rule.</summary>
public IReadOnlyList<object> QueuedItems { get; set; } = [];
}
/// <summary>
/// Internal state for <see cref="HarnessAppComponent"/>.
/// </summary>
public record HarnessAppComponentState : ConsoleReactiveState
{
/// <summary>Gets the selected index in list selection mode.</summary>
public int SelectedIndex { get; init; }
/// <summary>Gets the current input text being typed.</summary>
public string InputText { get; init; } = "";
/// <summary>Gets the current text being typed into the list's custom text option.</summary>
public string ListInputText { get; init; } = "";
/// <summary>Gets the current console width in columns.</summary>
public int ConsoleWidth { get; init; }
/// <summary>Gets the current console height in rows.</summary>
public int ConsoleHeight { get; init; }
}
/// <summary>
/// The main application component for the Harness console. Manages the scroll region
/// and bottom panel (text input, list selection, or streaming indicator), and emits
/// an <see cref="InputSubmitted"/> event when the user submits text in any mode.
/// and bottom panel (text input, list selection, or streaming indicator). Owns the
/// <see cref="HarnessConsoleUXStateDriver"/> and routes user input events to the
/// registered <see cref="HarnessAgentRunner"/>.
/// </summary>
public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentProps, HarnessAppComponentState>, IDisposable
public class HarnessAppComponent : ConsoleReactiveComponent<ConsoleReactiveProps, HarnessAppComponentState>, IDisposable
{
private readonly TopBottomRule _rule = new();
private readonly ListSelection _listSelection = new();
private readonly TextInput _textInput = new();
private readonly TextScrollPanel _textScrollPanel;
private readonly TextPanel _textPanel;
private readonly TextPanel _queuedPanel;
private readonly TextScrollPanel _textScrollPanel = new();
private readonly TextPanel _textPanel = new();
private readonly TextPanel _queuedPanel = new();
private readonly AgentStatus _agentStatus = new();
private readonly AgentModeAndHelp _modeAndHelp = new();
private readonly Func<object, string> _renderItem;
private bool _resizedSinceLastRender;
private readonly HarnessConsoleUXStateDriver _uxDriver;
private readonly TaskCompletionSource<bool> _shutdownTcs = new(TaskCreationOptions.RunContinuationsAsynchronously);
private readonly SemaphoreSlim _followUpGate = new(1, 1);
private int _scrollRegionBottom;
private bool _resizedSinceLastRender = true;
private bool _deactivated;
/// <summary>
/// Initializes a new instance of the <see cref="HarnessAppComponent"/> class.
/// </summary>
/// <param name="renderScrollItem">A delegate that renders a single output entry and returns the text to display.</param>
public HarnessAppComponent(Func<object, string> renderScrollItem)
/// <param name="placeholder">Placeholder text shown when the input is empty.</param>
/// <param name="initialMode">The current agent mode, used to colour the rule and prompt.</param>
/// <param name="inputEnabled">Whether the bottom-panel input accepts keystrokes during streaming.</param>
/// <param name="runnerFactory">Factory invoked with the component's <see cref="IUXStateDriver"/>
/// to construct the <see cref="HarnessAgentRunner"/> that owns the agent loop.</param>
/// <param name="modeColors">Optional mapping of mode names to console colors.</param>
public HarnessAppComponent(
string placeholder,
string? initialMode,
bool inputEnabled,
Func<IUXStateDriver, HarnessAgentRunner> runnerFactory,
IReadOnlyDictionary<string, ConsoleColor>? modeColors = null)
{
this._renderItem = renderScrollItem;
this._textScrollPanel = new TextScrollPanel(renderScrollItem);
this._textPanel = new TextPanel(renderScrollItem);
this._queuedPanel = new TextPanel(renderScrollItem);
this.Props = new ConsoleReactiveProps();
this.State = new HarnessAppComponentState
{
Mode = BottomPanelMode.TextInput,
Prompt = "> ",
Placeholder = placeholder,
ModeColor = ModeColors.Get(initialMode, modeColors),
ModeText = initialMode,
InputEnabled = inputEnabled,
ConsoleWidth = System.Console.WindowWidth,
ConsoleHeight = System.Console.WindowHeight,
};
this._uxDriver = new HarnessConsoleUXStateDriver(
getState: () => this.State!,
setState: s => this.SetState(s),
requestShutdown: () => this._shutdownTcs.TrySetResult(true),
modeColors: modeColors);
this.Runner = runnerFactory(this._uxDriver);
// Seed help text now that the runner (which knows the registered command handlers)
// is available. Direct assignment — no Render is triggered until the caller invokes Render().
this.State = this.State with { HelpText = this.Runner.HelpText };
KeyEventListener.Instance.KeyPressed += this.OnKeyPressed;
ConsoleResizeListener.Instance.ConsoleResized += this.OnConsoleResized;
}
/// <summary>
/// Gets the 1-based row number of the last row in the output scroll region.
/// Gets the agent runner that owns the agent loop. Constructed by the factory
/// passed to the component's constructor.
/// </summary>
public int ScrollRegionBottom { get; private set; }
public HarnessAgentRunner Runner { get; }
/// <summary>
/// Occurs when the user submits input via Enter, in any mode (text input, list selection,
/// or streaming injection). Consumers inspect <see cref="InputSubmittedEventArgs.Mode"/>
/// to decide how to handle the submission.
/// Completes when a command handler requests application shutdown (e.g. the user types <c>/exit</c>).
/// Awaited by <see cref="HarnessConsole.RunAgentAsync"/>.
/// </summary>
public event EventHandler<InputSubmittedEventArgs>? InputSubmitted;
public Task ShutdownTask => this._shutdownTcs.Task;
/// <summary>
/// Deactivates the component, resetting the scroll region and unsubscribing from events.
@@ -184,9 +102,6 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
this._agentStatus.Dispose();
KeyEventListener.Instance.KeyPressed -= this.OnKeyPressed;
ConsoleResizeListener.Instance.ConsoleResized -= this.OnConsoleResized;
System.Console.Write(AnsiEscapes.ResetScrollRegion);
System.Console.Write(AnsiEscapes.MoveCursor(System.Console.WindowHeight, 1));
System.Console.WriteLine();
}
/// <inheritdoc/>
@@ -205,20 +120,23 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
if (disposing)
{
this.Deactivate();
this._followUpGate.Dispose();
this.Runner.Dispose();
}
}
private void OnKeyPressed(object? sender, KeyPressEventArgs e)
{
if (this.Props!.Mode == BottomPanelMode.TextInput)
BottomPanelMode mode = this.State!.Mode;
if (mode == BottomPanelMode.TextInput)
{
this.HandleTextInputKey(e);
}
else if (this.Props.Mode == BottomPanelMode.ListSelection)
else if (mode == BottomPanelMode.ListSelection)
{
this.HandleListSelectionKey(e);
}
else if (this.Props.Mode == BottomPanelMode.Streaming && this.Props.InputEnabled)
else if (mode == BottomPanelMode.Streaming && this.State.InputEnabled)
{
this.HandleStreamingInputKey(e);
}
@@ -235,7 +153,7 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
}
this.SetState(this.State with { InputText = "" });
this.InputSubmitted?.Invoke(this, new InputSubmittedEventArgs(text, BottomPanelMode.TextInput));
this.DispatchTextInputSubmission(text);
}
else if (e.KeyInfo.Key == ConsoleKey.Backspace)
{
@@ -252,51 +170,50 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
private void HandleListSelectionKey(KeyPressEventArgs e)
{
int maxIndex = this.Props!.Items.Count - 1;
if (this.Props.ListCustomTextPlaceholder != null)
int maxIndex = this.State!.ListSelectionOptions.Count - 1;
if (this.State.ListSelectionCustomTextPlaceholder != null)
{
maxIndex = this.Props.Items.Count;
maxIndex = this.State.ListSelectionOptions.Count;
}
bool isOnCustomTextOption = this.Props.ListCustomTextPlaceholder != null
&& this.State!.SelectedIndex == this.Props.Items.Count;
bool isOnCustomTextOption = this.State.ListSelectionCustomTextPlaceholder != null
&& this.State.ListSelectionIndex == this.State.ListSelectionOptions.Count;
if (e.KeyInfo.Key == ConsoleKey.UpArrow)
{
this.SetState(this.State! with { SelectedIndex = Math.Max(0, this.State.SelectedIndex - 1) });
this.SetState(this.State with { ListSelectionIndex = Math.Max(0, this.State.ListSelectionIndex - 1) });
}
else if (e.KeyInfo.Key == ConsoleKey.DownArrow)
{
this.SetState(this.State! with { SelectedIndex = Math.Min(maxIndex, this.State.SelectedIndex + 1) });
this.SetState(this.State with { ListSelectionIndex = Math.Min(maxIndex, this.State.ListSelectionIndex + 1) });
}
else if (e.KeyInfo.Key == ConsoleKey.Enter)
{
string result = isOnCustomTextOption
? this.State!.ListInputText
: this.Props.Items[this.State!.SelectedIndex];
? this.State.ListSelectionCustomInputText
: this.State.ListSelectionOptions[this.State.ListSelectionIndex];
this.SetState(this.State with { ListInputText = "", SelectedIndex = 0 });
this.InputSubmitted?.Invoke(this, new InputSubmittedEventArgs(result, BottomPanelMode.ListSelection));
this.SetState(this.State with { ListSelectionCustomInputText = "", ListSelectionIndex = 0 });
this.DispatchListSelectionSubmission(result);
}
else if (isOnCustomTextOption)
{
if (e.KeyInfo.Key == ConsoleKey.Backspace)
{
if (this.State!.ListInputText.Length > 0)
if (this.State.ListSelectionCustomInputText.Length > 0)
{
this.SetState(this.State with { ListInputText = this.State.ListInputText[..^1] });
this.SetState(this.State with { ListSelectionCustomInputText = this.State.ListSelectionCustomInputText[..^1] });
}
}
else if (e.KeyInfo.KeyChar != '\0' && !char.IsControl(e.KeyInfo.KeyChar))
{
this.SetState(this.State! with { ListInputText = this.State.ListInputText + e.KeyInfo.KeyChar });
this.SetState(this.State with { ListSelectionCustomInputText = this.State.ListSelectionCustomInputText + e.KeyInfo.KeyChar });
}
}
}
private void HandleStreamingInputKey(KeyPressEventArgs e)
{
// During streaming with input enabled, capture text for message injection
if (e.KeyInfo.Key == ConsoleKey.Enter)
{
string text = this.State!.InputText;
@@ -306,7 +223,7 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
}
this.SetState(this.State with { InputText = "" });
this.InputSubmitted?.Invoke(this, new InputSubmittedEventArgs(text, BottomPanelMode.Streaming));
_ = this.Runner.OnStreamingInputAsync(text);
}
else if (e.KeyInfo.Key == ConsoleKey.Backspace)
{
@@ -321,6 +238,90 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
}
}
private void DispatchTextInputSubmission(string text)
{
if (this.State!.PendingQuestions.Count > 0)
{
_ = this.HandleFollowUpAnswerAsync(text);
}
else
{
_ = this.Runner.OnUserInputAsync(text);
}
}
private void DispatchListSelectionSubmission(string text)
{
// List selection is only used to answer FollowUpQuestions.
_ = this.HandleFollowUpAnswerAsync(text);
}
/// <summary>
/// Handles a user answer to the head of the pending follow-up question queue:
/// awaits the question's continuation (which is responsible for echoing both the
/// question and answer to the scroll area as it sees fit), appends any returned
/// chat message to the response accumulator, advances the queue, and — when the
/// queue empties — drains the accumulator and resumes the runner.
/// </summary>
private async Task HandleFollowUpAnswerAsync(string text)
{
IReadOnlyList<ChatMessage>? messagesToSend = null;
await this._followUpGate.WaitAsync().ConfigureAwait(false);
try
{
HarnessConsoleUXStateDriver ux = this._uxDriver;
IReadOnlyList<FollowUpQuestion> queue = this.State!.PendingQuestions;
if (queue.Count == 0)
{
return;
}
FollowUpQuestion head = queue[0];
ChatMessage? response;
try
{
response = await head.Continuation(text, ux).ConfigureAwait(false);
}
catch (Exception ex)
{
await ux.WriteInfoLineAsync($"❌ Follow-up handler error: {ex.GetType().Name}: {ex.Message}", ConsoleColor.Red).ConfigureAwait(false);
response = null;
}
if (response is not null)
{
ux.AddFollowUpResponse(response);
}
ux.AdvanceFollowUpQuestion();
if (this.State!.PendingQuestions.Count == 0)
{
messagesToSend = ux.TakeFollowUpResponses();
}
}
finally
{
this._followUpGate.Release();
}
// Resume the agent outside the gate — StartAgentTurnAsync runs the full agent
// loop which may queue new follow-up questions (re-entering this method).
if (messagesToSend is not null)
{
try
{
await this.Runner.StartAgentTurnAsync([.. messagesToSend]).ConfigureAwait(false);
}
catch (Exception ex)
{
await this._uxDriver.WriteInfoLineAsync($"❌ Agent error: {ex.GetType().Name}: {ex.Message}", ConsoleColor.Red).ConfigureAwait(false);
}
}
}
private void OnConsoleResized(object? sender, ConsoleResizeEventArgs e)
{
this._resizedSinceLastRender = true;
@@ -332,35 +333,40 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
}
/// <inheritdoc />
public override void RenderCore(HarnessAppComponentProps props, HarnessAppComponentState state)
public override void RenderCore(ConsoleReactiveProps props, HarnessAppComponentState state)
{
if (this._deactivated)
{
return;
}
// Determine the text panel height for the last scroll item
IReadOnlyList<object> lastItems = props.ScrollItems.Count > 0
? [props.ScrollItems[^1]]
IReadOnlyList<string> lastItems = state.ScrollAreaContentItems.Count > 0
? [state.ScrollAreaContentItems[^1]]
: [];
int textPanelHeight = TextPanel.CalculateHeight(lastItems, this._renderItem);
int textPanelHeight = TextPanel.CalculateHeight(lastItems);
if (textPanelHeight > 0)
{
textPanelHeight++; // Extra line for spacing between text panel and rule
}
// Calculate queued items panel height
int queuedPanelHeight = TextPanel.CalculateHeight(props.QueuedItems, this._renderItem);
int queuedPanelHeight = TextPanel.CalculateHeight(state.QueuedItems);
// Build the bottom panel child based on mode
ConsoleReactiveComponent bottomChild;
int bottomChildHeight;
if (props.Mode == BottomPanelMode.ListSelection)
if (state.Mode == BottomPanelMode.ListSelection)
{
var listProps = new ListSelectionProps
{
Title = props.ListTitle,
Items = props.Items,
SelectedIndex = state.SelectedIndex,
HighlightColor = props.ListHighlightColor,
CustomTextPlaceholder = props.ListCustomTextPlaceholder,
CustomText = state.ListInputText,
Title = state.ListSelectionTitle,
Items = state.ListSelectionOptions,
SelectedIndex = state.ListSelectionIndex,
HighlightColor = state.ListHighlightColor,
CustomTextPlaceholder = state.ListSelectionCustomTextPlaceholder,
CustomText = state.ListSelectionCustomInputText,
};
bottomChildHeight = ListSelection.CalculateHeight(listProps);
@@ -368,25 +374,25 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
this._listSelection.Props = listProps;
bottomChild = this._listSelection;
}
else if (props.Mode == BottomPanelMode.Streaming)
else if (state.Mode == BottomPanelMode.Streaming)
{
TextInputProps textInputProps;
if (props.InputEnabled)
if (state.InputEnabled)
{
textInputProps = new TextInputProps
{
Prompt = props.Prompt,
Prompt = state.Prompt,
Text = state.InputText,
Placeholder = props.Placeholder,
Placeholder = state.Placeholder,
};
}
else
{
textInputProps = new TextInputProps
{
Prompt = props.Prompt,
Prompt = state.Prompt,
Text = "",
Placeholder = props.StreamingPrompt,
Placeholder = state.StreamingPrompt,
};
}
@@ -400,9 +406,9 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
{
var textInputProps = new TextInputProps
{
Prompt = props.Prompt,
Prompt = state.Prompt,
Text = state.InputText,
Placeholder = props.Placeholder,
Placeholder = state.Placeholder,
};
bottomChildHeight = TextInput.CalculateHeight(textInputProps, state.ConsoleWidth);
@@ -415,46 +421,52 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
var ruleProps = new TopBottomRuleProps
{
Width = state.ConsoleWidth,
Color = props.ModeColor,
Color = state.ModeColor,
Children = [bottomChild],
};
// Calculate the agent status height
var agentStatusProps = new AgentStatusProps
{
ShowSpinner = props.ShowSpinner,
UsageText = props.UsageText,
ShowSpinner = state.ShowSpinner,
UsageText = state.UsageText,
};
int agentStatusHeight = AgentStatus.CalculateHeight(agentStatusProps);
// Calculate the mode-and-help height
var modeAndHelpProps = new AgentModeAndHelpProps
{
Mode = props.ModeText,
ModeColor = props.ModeColor,
HelpText = props.HelpText,
Mode = state.ModeText,
ModeColor = state.ModeColor,
HelpText = state.HelpText,
};
int modeAndHelpHeight = AgentModeAndHelp.CalculateHeight(modeAndHelpProps);
// Hide agent status and mode/help during follow-up questions (ListSelection mode)
// as they clutter the UI and aren't relevant.
bool showStatusAndHelp = state.Mode != BottomPanelMode.ListSelection;
int agentStatusHeight = showStatusAndHelp ? AgentStatus.CalculateHeight(agentStatusProps) : 0;
int modeAndHelpHeight = showStatusAndHelp ? AgentModeAndHelp.CalculateHeight(modeAndHelpProps) : 0;
int ruleHeight = TopBottomRule.CalculateHeight(ruleProps);
int scrollBottom = Math.Max(1, state.ConsoleHeight - ruleHeight - textPanelHeight - agentStatusHeight - queuedPanelHeight - modeAndHelpHeight);
int nonScrollHeight = ruleHeight + textPanelHeight + agentStatusHeight + queuedPanelHeight + modeAndHelpHeight + 1; // +1 for bottom padding
int scrollBottom = Math.Max(1, state.ConsoleHeight - nonScrollHeight);
// If scroll region changed or a clear is needed, reset everything
if (this._resizedSinceLastRender || (this.ScrollRegionBottom != 0 && scrollBottom != this.ScrollRegionBottom))
if (this._resizedSinceLastRender || (this._scrollRegionBottom != 0 && scrollBottom != this._scrollRegionBottom))
{
// Reset scroll region to full screen before erasing so the erase covers all rows —
// some terminals only erase within the active DECSTBM region.
System.Console.Write(AnsiEscapes.ResetScrollRegion);
System.Console.Write(AnsiEscapes.EraseEntireScreen);
System.Console.Write(AnsiEscapes.EraseScrollbackBuffer);
this._textScrollPanel.Reset();
this._resizedSinceLastRender = false;
}
this.ScrollRegionBottom = scrollBottom;
this._scrollRegionBottom = scrollBottom;
System.Console.Write(AnsiEscapes.SetScrollRegion(scrollBottom));
// Render text scroll panel in the scroll area (all items except the last)
IReadOnlyList<object> scrollItems = props.ScrollItems.Count > 1
? props.ScrollItems.Take(props.ScrollItems.Count - 1).ToList()
IReadOnlyList<string> scrollItems = state.ScrollAreaContentItems.Count > 1
? state.ScrollAreaContentItems.Take(state.ScrollAreaContentItems.Count - 1).ToList()
: [];
this._textScrollPanel.X = 1;
@@ -486,18 +498,21 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
this._queuedPanel.Height = queuedPanelHeight;
this._queuedPanel.Props = new TextPanelProps
{
Items = props.QueuedItems,
Items = state.QueuedItems,
};
this._queuedPanel.Render();
// Render the agent status line between queued items and rule
int agentStatusY = queuedPanelY + queuedPanelHeight;
this._agentStatus.X = 1;
this._agentStatus.Y = agentStatusY;
this._agentStatus.Width = state.ConsoleWidth;
this._agentStatus.Height = agentStatusHeight;
this._agentStatus.Props = agentStatusProps;
this._agentStatus.Render();
if (showStatusAndHelp)
{
this._agentStatus.X = 1;
this._agentStatus.Y = agentStatusY;
this._agentStatus.Width = state.ConsoleWidth;
this._agentStatus.Height = agentStatusHeight;
this._agentStatus.Props = agentStatusProps;
this._agentStatus.Render();
}
// Render the bottom rule + child below the agent status
this._rule.X = 1;
@@ -506,24 +521,27 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
this._rule.Render();
// Render the mode-and-help line below the bottom rule
int modeAndHelpY = this._rule.Y + ruleHeight;
this._modeAndHelp.X = 1;
this._modeAndHelp.Y = modeAndHelpY;
this._modeAndHelp.Width = state.ConsoleWidth;
this._modeAndHelp.Height = modeAndHelpHeight;
this._modeAndHelp.Props = modeAndHelpProps;
this._modeAndHelp.Render();
if (showStatusAndHelp)
{
int modeAndHelpY = this._rule.Y + ruleHeight;
this._modeAndHelp.X = 1;
this._modeAndHelp.Y = modeAndHelpY;
this._modeAndHelp.Width = state.ConsoleWidth;
this._modeAndHelp.Height = modeAndHelpHeight;
this._modeAndHelp.Props = modeAndHelpProps;
this._modeAndHelp.Render();
}
// Position cursor for natural typing appearance
this.PositionCursor(props, state);
this.PositionCursor(state);
}
private void PositionCursor(HarnessAppComponentProps props, HarnessAppComponentState state)
private void PositionCursor(HarnessAppComponentState state)
{
if (props.Mode == BottomPanelMode.TextInput
|| (props.Mode == BottomPanelMode.Streaming && props.InputEnabled))
if (state.Mode == BottomPanelMode.TextInput
|| (state.Mode == BottomPanelMode.Streaming && state.InputEnabled))
{
int promptLength = props.Prompt.Length;
int promptLength = state.Prompt.Length;
int textWidth = state.ConsoleWidth - promptLength;
int textLength = state.InputText.Length;
@@ -540,13 +558,13 @@ public class HarnessAppComponent : ConsoleReactiveComponent<HarnessAppComponentP
System.Console.Write(AnsiEscapes.MoveCursor(textInputY + cursorRow, promptLength + cursorCol + 1));
}
}
else if (props.Mode == BottomPanelMode.ListSelection
&& props.ListCustomTextPlaceholder != null
&& state.SelectedIndex == props.Items.Count)
else if (state.Mode == BottomPanelMode.ListSelection
&& state.ListSelectionCustomTextPlaceholder != null
&& state.ListSelectionIndex == state.ListSelectionOptions.Count)
{
int titleLines = props.ListTitle?.Split('\n').Length ?? 0;
int customOptionY = this._rule.Y + 1 + titleLines + props.Items.Count;
int cursorCol = 2 + state.ListInputText.Length + 1;
int titleLines = state.ListSelectionTitle?.Split('\n').Length ?? 0;
int customOptionY = this._rule.Y + 1 + titleLines + state.ListSelectionOptions.Count;
int cursorCol = 2 + state.ListSelectionCustomInputText.Length + 1;
System.Console.Write(AnsiEscapes.MoveCursor(customOptionY, cursorCol));
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/HarnessAppComponentState.cs
+125
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@@ -0,0 +1,125 @@
// Copyright (c) Microsoft. All rights reserved.
using Harness.ConsoleReactiveFramework;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console;
/// <summary>
/// Determines which component is shown in the bottom panel.
/// </summary>
public enum BottomPanelMode
{
/// <summary>Show the text input component for user input.</summary>
TextInput,
/// <summary>Show the list selection component for interactive prompts.</summary>
ListSelection,
/// <summary>Show a disabled input indicator during agent streaming.</summary>
Streaming,
}
/// <summary>
/// Internal state for <see cref="HarnessAppComponent"/>. All UI fields that may
/// change after construction live here; they are mutated exclusively via
/// <see cref="ConsoleReactiveComponent{TProps,TState}.SetState"/> by the
/// owning <see cref="HarnessConsoleUXStateDriver"/>.
/// </summary>
public record HarnessAppComponentState : ConsoleReactiveState
{
// --- Console dimensions ---
/// <summary>Gets the current console width in columns.</summary>
public int ConsoleWidth { get; init; }
/// <summary>Gets the current console height in rows.</summary>
public int ConsoleHeight { get; init; }
// --- Bottom panel mode ---
/// <summary>Gets the bottom panel mode.</summary>
public BottomPanelMode Mode { get; init; } = BottomPanelMode.TextInput;
/// <summary>
/// Gets the queue of follow-up questions waiting for user answers. The head
/// (<c>[0]</c>) is the question currently being displayed; subsequent items
/// are dispatched in order as each is answered. While this queue is non-empty,
/// the next user submission is treated as the answer to the head question
/// instead of going to the agent runner's normal input handler.
/// </summary>
public IReadOnlyList<FollowUpQuestion> PendingQuestions { get; init; } = [];
/// <summary>
/// Gets the accumulated follow-up response messages collected during the
/// current agent turn — both direct <see cref="FollowUpMessage"/>s emitted
/// by observers and continuation results from answered questions. Consumed
/// by the runner via <see cref="IUXStateDriver.TakeFollowUpResponses"/>
/// before the next agent invocation.
/// </summary>
public IReadOnlyList<ChatMessage> AccumulatedFollowUpResponses { get; init; } = [];
// --- Text input (active in TextInput / Streaming modes) ---
/// <summary>Gets the prompt string for text input mode.</summary>
public string Prompt { get; init; } = "> ";
/// <summary>Gets the placeholder text shown when the input is empty.</summary>
public string Placeholder { get; init; } = "";
/// <summary>Gets the current input text being typed.</summary>
public string InputText { get; init; } = "";
/// <summary>Gets a value indicating whether input is enabled during streaming.</summary>
public bool InputEnabled { get; init; }
/// <summary>Gets the prompt to show during streaming when input is disabled.</summary>
public string StreamingPrompt { get; init; } = "(agent is running...)";
// --- List selection (active in ListSelection mode) ---
/// <summary>Gets the title text displayed above the list selection (for interactive prompts).</summary>
public string? ListSelectionTitle { get; init; }
/// <summary>Gets the list selection options.</summary>
public IReadOnlyList<string> ListSelectionOptions { get; init; } = [];
/// <summary>Gets the highlighted option index in list selection mode.</summary>
public int ListSelectionIndex { get; init; }
/// <summary>Gets the placeholder text for the custom text input option in the list.</summary>
public string? ListSelectionCustomTextPlaceholder { get; init; }
/// <summary>Gets the current text being typed into the list's custom text option.</summary>
public string ListSelectionCustomInputText { get; init; } = "";
/// <summary>Gets the highlight color for the active list item.</summary>
public ConsoleColor ListHighlightColor { get; init; } = ConsoleColor.Cyan;
// --- Scroll / output area ---
/// <summary>Gets the items rendered in the scroll-area. Each item is a pre-rendered
/// console string (may include ANSI escape sequences and newlines).</summary>
public IReadOnlyList<string> ScrollAreaContentItems { get; init; } = [];
/// <summary>Gets the queued input items to display above the rule. Each item is a
/// pre-rendered console string (may include ANSI escape sequences and newlines).</summary>
public IReadOnlyList<string> QueuedItems { get; init; } = [];
// --- Agent mode + status display ---
/// <summary>Gets the foreground color for the rule borders and mode label.</summary>
public ConsoleColor? ModeColor { get; init; }
/// <summary>Gets the current mode name displayed below the bottom rule (e.g. "plan").</summary>
public string? ModeText { get; init; }
/// <summary>Gets the help text displayed below the bottom rule (available commands).</summary>
public string? HelpText { get; init; }
/// <summary>Gets a value indicating whether the agent status spinner is visible.</summary>
public bool ShowSpinner { get; init; }
/// <summary>Gets the formatted token usage text to display in the status bar.</summary>
public string? UsageText { get; init; }
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/HarnessConsole.cs
+31 -219
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@@ -1,9 +1,7 @@
// Copyright (c) Microsoft. All rights reserved.
using Harness.Shared.Console.Commands;
using Harness.Shared.Console.Observers;
using Harness.ConsoleReactiveComponents;
using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console;
@@ -15,244 +13,58 @@ public static class HarnessConsole
{
/// <summary>
/// Runs an interactive console session with the specified agent.
/// Supports streaming output, tool call display, spinner animation,
/// optional planning UX with structured output, and the <c>/todos</c> command.
/// Constructs the reactive UI component and the <see cref="HarnessAgentRunner"/>,
/// wires them together, and awaits the component's <see cref="HarnessAppComponent.ShutdownTask"/>
/// (which completes when the user types <c>/exit</c>).
/// </summary>
/// <param name="agent">The agent to interact with.</param>
/// <param name="title">The title displayed in the console header.</param>
/// <param name="userPrompt">A short prompt to the user, displayed below the title.</param>
/// <param name="userPrompt">A short prompt to the user, displayed as a placeholder in the input area.</param>
/// <param name="options">Optional configuration options for the console session.</param>
public static async Task RunAgentAsync(AIAgent agent, string title, string userPrompt, HarnessConsoleOptions? options = null)
public static async Task RunAgentAsync(AIAgent agent, string userPrompt, HarnessConsoleOptions? options = null)
{
options ??= new();
if (options.EnablePlanningUx
&& (string.IsNullOrWhiteSpace(options.PlanningModeName) || string.IsNullOrWhiteSpace(options.ExecutionModeName)))
{
throw new ArgumentException(
"When EnablePlanningUx is true, both PlanningModeName and ExecutionModeName must be configured.",
nameof(options));
}
// Null means use defaults; an explicit (possibly empty) list means use exactly what was provided.
var observers = options.Observers
?? HarnessConsoleOptions.BuildDefaultObservers();
var commandHandlers = options.CommandHandlers
?? HarnessConsoleOptions.BuildDefaultCommandHandlers(agent, options.ModeColors);
var todoProvider = agent.GetService<TodoProvider>();
var modeProvider = agent.GetService<AgentModeProvider>();
var messageInjector = agent.GetService<MessageInjectingChatClient>();
var commandHandlers = new List<CommandHandler>
{
new TodoCommandHandler(todoProvider),
new ModeCommandHandler(modeProvider, options.ModeColors),
};
AgentSession session = await agent.CreateSessionAsync();
using var ux = new HarnessUXContainer(
using var component = new HarnessAppComponent(
placeholder: userPrompt,
initialMode: modeProvider?.GetMode(session),
inputEnabled: messageInjector is not null,
runnerFactory: ux => new HarnessAgentRunner(
agent: agent,
session: session,
modeProvider: modeProvider,
messageInjector: messageInjector,
commandHandlers: commandHandlers,
observers: observers,
ux: ux),
modeColors: options.ModeColors);
// Streaming-mode submissions are enqueued for injection; the queued display
// is then refreshed from the injector's current pending list.
ux.StreamingInputReceived += (sender, e) =>
// Trigger the initial render of the component now that state is seeded.
component.Render();
try
{
if (messageInjector is null)
{
return;
}
messageInjector.EnqueueMessages(session, [new ChatMessage(ChatRole.User, e.Text)]);
ux.ShowQueuedMessages(messageInjector.GetPendingMessages(session));
};
var commandHelp = commandHandlers
.Select(h => h.GetHelpText())
.Where(t => t is not null)
.Append("exit (quit)")!;
ux.Initialize(title, commandHelp!, messageInjector is not null);
string userInput = await ux.WaitForInputAsync();
while (!string.IsNullOrWhiteSpace(userInput) && !userInput.Equals("exit", StringComparison.OrdinalIgnoreCase))
await component.ShutdownTask.ConfigureAwait(false);
}
finally
{
ux.WriteUserInputEcho(userInput);
// Check command handlers first — first one to handle wins.
bool handled = false;
foreach (var handler in commandHandlers)
{
if (await handler.TryHandleAsync(userInput, session, ux).ConfigureAwait(false))
{
handled = true;
break;
}
}
if (!handled)
{
await RunAgentTurnAsync(agent, session, modeProvider, messageInjector, options, ux, userInput);
}
ux.CurrentMode = modeProvider?.GetMode(session);
userInput = await ux.WaitForInputAsync();
component.Deactivate();
}
ux.Deactivate();
System.Console.ResetColor();
System.Console.Write(AnsiEscapes.ResetScrollRegion);
System.Console.Write(AnsiEscapes.EraseEntireScreen);
System.Console.Write(AnsiEscapes.MoveCursor(1, 1));
System.Console.WriteLine("Goodbye!");
}
/// <summary>
/// Runs one or more agent invocations for a single user turn, using the current
/// observers. Re-invokes automatically for tool approvals and mode-driven follow-ups
/// (e.g., planning clarification loops).
/// </summary>
private static async Task RunAgentTurnAsync(
AIAgent agent,
AgentSession session,
AgentModeProvider? modeProvider,
MessageInjectingChatClient? messageInjector,
HarnessConsoleOptions options,
HarnessUXContainer ux,
string userInput)
{
IList<ChatMessage>? nextMessages = [new ChatMessage(ChatRole.User, userInput)];
IReadOnlyList<ChatMessage> lastPendingMessages = messageInjector?.GetPendingMessages(session) ?? [];
while (nextMessages is not null)
{
var observers = CreateObservers(options, modeProvider, session);
var runOptions = new AgentRunOptions();
foreach (var observer in observers)
{
observer.ConfigureRunOptions(runOptions);
}
ux.CurrentMode = modeProvider?.GetMode(session);
ux.BeginStreaming();
ux.BeginStreamingOutput();
try
{
await foreach (var update in agent.RunStreamingAsync(nextMessages, session, runOptions))
{
// Update mode color if the mode changed during streaming.
if (modeProvider is not null)
{
string currentMode = modeProvider.GetMode(session);
if (currentMode != ux.CurrentMode)
{
ux.CurrentMode = currentMode;
}
}
foreach (var content in update.Contents)
{
foreach (var observer in observers)
{
await observer.OnContentAsync(ux, content);
}
}
if (!string.IsNullOrEmpty(update.Text))
{
foreach (var observer in observers)
{
await observer.OnTextAsync(ux, update.Text);
}
}
SyncQueuedMessageDisplay(messageInjector, session, ux, ref lastPendingMessages);
}
}
catch (Exception ex)
{
await ux.WriteInfoLineAsync($"❌ Stream error: {ex.GetType().Name}:\n{ex}", ConsoleColor.Red);
}
// Final sync after streaming — messages may have been consumed during the last iteration.
SyncQueuedMessageDisplay(messageInjector, session, ux, ref lastPendingMessages);
// Stop spinner before observer completions (which may prompt for input).
ux.StopSpinner();
// Close the streaming output to provide visual separation from observer output.
await ux.EndStreamingOutputAsync();
var combinedMessages = new List<ChatMessage>();
bool hasObserverMessages = false;
foreach (var observer in observers)
{
var messages = await observer.OnStreamCompleteAsync(ux, agent, session, options);
if (messages is { Count: > 0 })
{
combinedMessages.AddRange(messages);
hasObserverMessages = true;
}
}
await ux.WriteNoTextWarningAsync(hasFollowUpMessages: hasObserverMessages);
ux.EndStreaming();
nextMessages = combinedMessages.Count > 0 ? combinedMessages : null;
}
}
/// <summary>
/// Synchronizes the queued items display with the message injector's pending messages.
/// Messages that have been consumed (drained by the service) are echoed to the output
/// area as regular user-input entries.
/// </summary>
private static void SyncQueuedMessageDisplay(
MessageInjectingChatClient? messageInjector,
AgentSession session,
HarnessUXContainer ux,
ref IReadOnlyList<ChatMessage> lastPendingMessages)
{
if (messageInjector is null)
{
return;
}
var pending = messageInjector.GetPendingMessages(session);
// If previously pending messages exceed current pending count, some were consumed.
int consumedCount = lastPendingMessages.Count - pending.Count;
for (int i = 0; i < consumedCount && i < lastPendingMessages.Count; i++)
{
string text = lastPendingMessages[i].Text ?? string.Empty;
ux.WriteUserInputEcho(text);
}
lastPendingMessages = pending;
ux.ShowQueuedMessages(pending);
}
private static List<ConsoleObserver> CreateObservers(HarnessConsoleOptions options, AgentModeProvider? modeProvider, AgentSession session)
{
var observers = new List<ConsoleObserver>
{
new ToolCallDisplayObserver(),
new ToolApprovalObserver(),
new ErrorDisplayObserver(),
new ReasoningDisplayObserver(),
new UsageDisplayObserver(options.MaxContextWindowTokens, options.MaxOutputTokens),
};
if (options.EnablePlanningUx
&& modeProvider is not null
&& string.Equals(modeProvider.GetMode(session), options.PlanningModeName, StringComparison.OrdinalIgnoreCase))
{
observers.Add(new PlanningOutputObserver(modeProvider));
}
else
{
observers.Add(new TextOutputObserver());
}
return observers;
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/HarnessConsoleOptions.cs
+109 -28
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@@ -1,5 +1,11 @@
// Copyright (c) Microsoft. All rights reserved.
using System.Collections.ObjectModel;
using Harness.Shared.Console.Commands;
using Harness.Shared.Console.Observers;
using Harness.Shared.Console.ToolFormatters;
using Microsoft.Agents.AI;
namespace Harness.Shared.Console;
/// <summary>
@@ -8,45 +14,120 @@ namespace Harness.Shared.Console;
public class HarnessConsoleOptions
{
/// <summary>
/// Gets or sets the optional maximum context window size in tokens.
/// When set, token usage is displayed as a percentage of the budget.
/// Gets or sets the list of console observers that participate in the agent response
/// streaming lifecycle. Use the factory methods on this class to create common observer sets.
/// When <see langword="null"/> (the default), a default set of observers is used.
/// Set to an empty list to disable all observers.
/// </summary>
public int? MaxContextWindowTokens { get; set; }
public IReadOnlyList<ConsoleObserver>? Observers { get; set; }
/// <summary>
/// Gets or sets the optional maximum output tokens.
/// Used with <see cref="MaxContextWindowTokens"/> to show input/output budget breakdown.
/// Gets or sets the list of command handlers to check before sending user input to the agent.
/// Use <see cref="BuildDefaultCommandHandlers"/> to create the default set.
/// When <see langword="null"/> (the default), a default set of handlers is used.
/// Set to an empty list to disable all command handlers.
/// </summary>
public int? MaxOutputTokens { get; set; }
public IReadOnlyList<CommandHandler>? CommandHandlers { get; set; }
/// <summary>
/// Gets or sets a value indicating whether the planning UX is enabled.
/// When <see langword="true"/> and the agent is in the mode specified by <see cref="PlanningModeName"/>,
/// the console uses structured output to present clarification questions and approval requests
/// instead of streaming free-form text.
/// The default mode-to-color mapping used when no custom <see cref="ModeColors"/> are provided.
/// </summary>
/// <value>Defaults to <see langword="false"/>.</value>
public bool EnablePlanningUx { get; set; }
/// <summary>
/// Gets or sets the name of the agent mode that activates the planning UX.
/// Must be set when <see cref="EnablePlanningUx"/> is <see langword="true"/>.
/// </summary>
public string? PlanningModeName { get; set; }
/// <summary>
/// Gets or sets the name of the agent mode to switch to when the user approves a plan.
/// Must be set when <see cref="EnablePlanningUx"/> is <see langword="true"/>.
/// </summary>
public string? ExecutionModeName { get; set; }
public static readonly IReadOnlyDictionary<string, ConsoleColor> DefaultModeColors = new ReadOnlyDictionary<string, ConsoleColor>(
new Dictionary<string, ConsoleColor>(StringComparer.OrdinalIgnoreCase)
{
["plan"] = ConsoleColor.Cyan,
["execute"] = ConsoleColor.Green,
});
/// <summary>
/// Gets or sets a mapping of agent mode names to console colors.
/// When a mode is not found in this dictionary, the default color (<see cref="ConsoleColor.Gray"/>) is used.
/// </summary>
public Dictionary<string, ConsoleColor> ModeColors { get; set; } = new(StringComparer.OrdinalIgnoreCase)
public Dictionary<string, ConsoleColor> ModeColors { get; set; } = new(DefaultModeColors, StringComparer.OrdinalIgnoreCase);
/// <summary>
/// Creates the default set of observers without planning support.
/// Includes tool call display, tool approval, error display, reasoning display,
/// usage display, and text output.
/// </summary>
/// <param name="maxContextWindowTokens">Optional maximum context window size in tokens for usage display.</param>
/// <param name="maxOutputTokens">Optional maximum output tokens for usage display.</param>
/// <param name="toolFormatters">Optional tool call formatters. When <see langword="null"/>,
/// each observer uses the default formatters from <see cref="ToolCallFormatter.BuildDefaultToolFormatters"/>.</param>
/// <returns>A list of observers for a standard (non-planning) console session.</returns>
public static List<ConsoleObserver> BuildDefaultObservers(
int? maxContextWindowTokens = null,
int? maxOutputTokens = null,
IReadOnlyList<ToolCallFormatter>? toolFormatters = null)
{
["plan"] = ConsoleColor.Cyan,
["execute"] = ConsoleColor.Green,
};
return
[
new ToolCallDisplayObserver(toolFormatters),
new ToolApprovalObserver(toolFormatters),
new ErrorDisplayObserver(),
new ReasoningDisplayObserver(),
new UsageDisplayObserver(maxContextWindowTokens, maxOutputTokens),
new TextOutputObserver(),
];
}
/// <summary>
/// Creates the default set of observers with planning support.
/// Includes a <see cref="PlanningOutputObserver"/> instead of <see cref="TextOutputObserver"/>.
/// </summary>
/// <param name="agent">The agent, used to resolve <see cref="AgentModeProvider"/>.</param>
/// <param name="planModeName">The mode name that represents the planning mode.</param>
/// <param name="executionModeName">The mode name to switch to when the user approves a plan.</param>
/// <param name="modeColors">Optional mode-to-color mapping for display.
/// Defaults to <see cref="DefaultModeColors"/> when <see langword="null"/>.</param>
/// <param name="maxContextWindowTokens">Optional maximum context window size in tokens for usage display.</param>
/// <param name="maxOutputTokens">Optional maximum output tokens for usage display.</param>
/// <param name="toolFormatters">Optional tool call formatters. When <see langword="null"/>,
/// each observer uses the default formatters from <see cref="ToolCallFormatter.BuildDefaultToolFormatters"/>.</param>
/// <returns>A list of observers for a planning-enabled console session.</returns>
public static List<ConsoleObserver> BuildObserversWithPlanning(
AIAgent agent,
string planModeName,
string executionModeName,
IReadOnlyDictionary<string, ConsoleColor>? modeColors = null,
int? maxContextWindowTokens = null,
int? maxOutputTokens = null,
IReadOnlyList<ToolCallFormatter>? toolFormatters = null)
{
var modeProvider = agent.GetService<AgentModeProvider>()
?? throw new InvalidOperationException("Planning requires an AgentModeProvider service on the agent.");
return
[
new ToolCallDisplayObserver(toolFormatters),
new ToolApprovalObserver(toolFormatters),
new ErrorDisplayObserver(),
new ReasoningDisplayObserver(),
new UsageDisplayObserver(maxContextWindowTokens, maxOutputTokens),
new PlanningOutputObserver(modeProvider, planModeName, executionModeName, modeColors ?? DefaultModeColors),
];
}
/// <summary>
/// Creates the default set of command handlers.
/// Includes exit, todo, and mode command handlers.
/// </summary>
/// <param name="agent">The agent, used to resolve <see cref="TodoProvider"/> and <see cref="AgentModeProvider"/>.</param>
/// <param name="modeColors">Optional mode-to-color mapping for the mode command display.
/// Defaults to <see cref="DefaultModeColors"/> when <see langword="null"/>.</param>
/// <returns>A list of command handlers for a standard console session.</returns>
public static List<CommandHandler> BuildDefaultCommandHandlers(
AIAgent agent,
IReadOnlyDictionary<string, ConsoleColor>? modeColors = null)
{
var todoProvider = agent.GetService<TodoProvider>();
var modeProvider = agent.GetService<AgentModeProvider>();
return
[
new ExitCommandHandler(),
new TodoCommandHandler(todoProvider),
new ModeCommandHandler(modeProvider, modeColors ?? DefaultModeColors),
];
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/HarnessConsoleUXStateDriver.cs
+408
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@@ -0,0 +1,408 @@
// Copyright (c) Microsoft. All rights reserved.
using Harness.ConsoleReactiveComponents;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console;
/// <summary>
/// Default <see cref="IUXStateDriver"/> implementation. Owned by
/// <see cref="HarnessAppComponent"/>; mutates the component's state via a
/// <c>SetState</c>-style callback. Each public operation updates state and lets
/// the component's render-skip optimization handle the actual draw.
/// </summary>
internal sealed class HarnessConsoleUXStateDriver : IUXStateDriver
{
private readonly Func<HarnessAppComponentState> _getState;
private readonly Action<HarnessAppComponentState> _setState;
private readonly Action _requestShutdown;
private readonly IReadOnlyDictionary<string, ConsoleColor>? _modeColors;
private readonly List<string> _outputItems = [];
private readonly object _stateLock = new();
private OutputEntryType? _lastEntryType;
private bool _hasReceivedAnyText;
private OutputEntry? _currentStreamingEntry;
private int _currentStreamingEntryIndex = -1;
private string? _currentMode;
/// <summary>
/// Initializes a new instance of the <see cref="HarnessConsoleUXStateDriver"/> class.
/// </summary>
/// <param name="getState">Returns the component's current state.</param>
/// <param name="setState">Replaces the component's state and triggers a re-render.</param>
/// <param name="requestShutdown">Callback invoked when a command handler requests application shutdown.</param>
/// <param name="modeColors">Optional mapping of mode names to console colors.</param>
public HarnessConsoleUXStateDriver(
Func<HarnessAppComponentState> getState,
Action<HarnessAppComponentState> setState,
Action requestShutdown,
IReadOnlyDictionary<string, ConsoleColor>? modeColors = null)
{
this._getState = getState;
this._setState = setState;
this._requestShutdown = requestShutdown;
this._modeColors = modeColors;
this._currentMode = getState().ModeText;
}
/// <inheritdoc/>
public string? CurrentMode
{
get => this._currentMode;
set
{
this.UpdateState(s =>
{
this._currentMode = value;
return s with
{
ModeColor = ModeColors.Get(value, this._modeColors),
ModeText = value,
};
});
}
}
/// <inheritdoc/>
public void BeginStreaming() =>
this.UpdateState(s => s with
{
Mode = BottomPanelMode.Streaming,
ShowSpinner = true,
});
/// <inheritdoc/>
public void StopSpinner() =>
this.UpdateState(s => s with { ShowSpinner = false });
/// <inheritdoc/>
public void EndStreaming() =>
this.UpdateState(s => s with
{
Mode = BottomPanelMode.TextInput,
ShowSpinner = false,
});
/// <inheritdoc/>
public void BeginStreamingOutput()
{
lock (this._stateLock)
{
this._hasReceivedAnyText = false;
this._currentStreamingEntry = null;
this._currentStreamingEntryIndex = -1;
}
}
/// <inheritdoc/>
public void SetUsageText(string usageText) =>
this.UpdateState(s => s with { UsageText = usageText });
/// <inheritdoc/>
public void SetQueuedMessages(IReadOnlyList<ChatMessage> pending)
{
var newQueued = new List<string>(pending.Count);
foreach (var msg in pending)
{
string text = msg.Text ?? string.Empty;
newQueued.Add(RenderEntry($" 💬 {text}\n", ConsoleColor.DarkGray));
}
this.UpdateState(s => s with { QueuedItems = newQueued });
}
/// <inheritdoc/>
public void QueueFollowUpQuestions(IReadOnlyList<FollowUpQuestion> questions)
{
if (questions.Count == 0)
{
return;
}
this.UpdateState(s =>
{
bool wasEmpty = s.PendingQuestions.Count == 0;
var combined = new List<FollowUpQuestion>(s.PendingQuestions.Count + questions.Count);
combined.AddRange(s.PendingQuestions);
combined.AddRange(questions);
HarnessAppComponentState next = s with { PendingQuestions = combined };
if (wasEmpty)
{
next = this.ConfigureForHeadQuestion(next, combined[0]);
}
return next;
});
}
/// <inheritdoc/>
public void AddFollowUpResponse(ChatMessage response)
{
this.UpdateState(s =>
{
var combined = new List<ChatMessage>(s.AccumulatedFollowUpResponses.Count + 1);
combined.AddRange(s.AccumulatedFollowUpResponses);
combined.Add(response);
return s with { AccumulatedFollowUpResponses = combined };
});
}
/// <inheritdoc/>
public void AdvanceFollowUpQuestion()
{
this.UpdateState(s =>
{
if (s.PendingQuestions.Count == 0)
{
return s;
}
var remaining = s.PendingQuestions.Skip(1).ToList();
HarnessAppComponentState next = s with { PendingQuestions = remaining };
if (remaining.Count > 0)
{
return this.ConfigureForHeadQuestion(next, remaining[0]);
}
return next with
{
Mode = BottomPanelMode.TextInput,
ListSelectionOptions = [],
ListSelectionTitle = null,
ListSelectionCustomTextPlaceholder = null,
ListSelectionIndex = 0,
ListSelectionCustomInputText = "",
};
});
}
/// <inheritdoc/>
public IReadOnlyList<ChatMessage> TakeFollowUpResponses()
{
return this.UpdateState(s =>
{
IReadOnlyList<ChatMessage> responses = s.AccumulatedFollowUpResponses;
if (responses.Count == 0)
{
return (s, responses);
}
return (s with { AccumulatedFollowUpResponses = [] }, responses);
});
}
/// <summary>
/// Configures the bottom-panel display fields on the supplied state for the
/// given head question. For text questions, also writes the prompt as an
/// info line above the input row as a side effect.
/// </summary>
private HarnessAppComponentState ConfigureForHeadQuestion(HarnessAppComponentState state, FollowUpQuestion question)
{
if (question is ChoiceFollowUpQuestion choice)
{
return state with
{
Mode = BottomPanelMode.ListSelection,
ListSelectionOptions = choice.Choices.ToList(),
ListSelectionTitle = choice.Prompt,
ListSelectionCustomTextPlaceholder = choice.AllowCustomText ? "✏️ Type a custom response..." : null,
ListSelectionIndex = 0,
ListSelectionCustomInputText = "",
};
}
// Text question — prompt is rendered as an info line above the input row.
// We append entries and capture the scroll snapshot inline so the caller's
// single _setState picks up both the new output and the UI mode change.
ConsoleColor ruleColor = ModeColors.Get(this._currentMode, this._modeColors);
List<string> scrollSnapshot = this.AppendOutputEntriesAndSnapshot(
new OutputEntry(OutputEntryType.InfoLine, "\n", ruleColor),
new OutputEntry(OutputEntryType.InfoLine, $" {question.Prompt}", ruleColor));
return state with
{
Mode = BottomPanelMode.TextInput,
ListSelectionOptions = [],
ListSelectionTitle = null,
ListSelectionCustomTextPlaceholder = null,
ListSelectionIndex = 0,
ListSelectionCustomInputText = "",
ScrollAreaContentItems = scrollSnapshot,
};
}
/// <inheritdoc/>
public void WriteUserInputEcho(string text)
{
this.UpdateState(s =>
{
List<string> snapshot = this.AppendOutputEntriesAndSnapshot(new OutputEntry(
OutputEntryType.UserInput,
$"\nYou: {text}\n\n",
ConsoleColor.Green));
return s with { ScrollAreaContentItems = snapshot };
});
}
/// <inheritdoc/>
public Task WriteInfoAsync(string text, ConsoleColor? color = null) =>
this.WriteInfoCoreAsync(text, color, newLine: false);
/// <inheritdoc/>
public Task WriteInfoLineAsync(string text, ConsoleColor? color = null) =>
this.WriteInfoCoreAsync(text, color, newLine: true);
private Task WriteInfoCoreAsync(string text, ConsoleColor? color, bool newLine)
{
this.UpdateState(s =>
{
// Add a blank line separator when transitioning from streaming text or user input.
string prefix = this._lastEntryType is OutputEntryType.StreamingText or OutputEntryType.StreamFooter
? "\n "
: " ";
string fullText = newLine ? prefix + text + "\n\n" : prefix + text;
List<string> snapshot = this.AppendOutputEntriesAndSnapshot(new OutputEntry(
OutputEntryType.InfoLine,
fullText,
color ?? ModeColors.Get(this._currentMode, this._modeColors)));
return s with { ScrollAreaContentItems = snapshot };
});
return Task.CompletedTask;
}
/// <inheritdoc/>
public Task WriteTextAsync(string text, ConsoleColor? color = null)
{
this.UpdateState(s =>
{
this._lastEntryType = OutputEntryType.StreamingText;
this._hasReceivedAnyText = true;
ConsoleColor effectiveColor = color ?? ModeColors.Get(this._currentMode, this._modeColors);
if (this._currentStreamingEntry is not null
&& this._currentStreamingEntryIndex == this._outputItems.Count - 1)
{
// The streaming entry is still the last item — safe to replace in place.
this._currentStreamingEntry = this._currentStreamingEntry with
{
Text = this._currentStreamingEntry.Text + text,
};
this._outputItems[^1] = RenderEntry(this._currentStreamingEntry.Text, this._currentStreamingEntry.Color);
}
else
{
// Either the first text delta or other entries (tool calls, info lines)
// were appended after the previous streaming entry — start a fresh one.
const string Prefix = "\n";
this._currentStreamingEntry = new OutputEntry(OutputEntryType.StreamingText, Prefix + text, effectiveColor);
this._outputItems.Add(RenderEntry(this._currentStreamingEntry.Text, this._currentStreamingEntry.Color));
this._currentStreamingEntryIndex = this._outputItems.Count - 1;
}
return s with { ScrollAreaContentItems = new List<string>(this._outputItems) };
});
return Task.CompletedTask;
}
/// <inheritdoc/>
public Task EndStreamingOutputAsync()
{
this.UpdateState(s =>
{
if (this._hasReceivedAnyText)
{
this._outputItems.Add(RenderEntry("\n", null));
this._currentStreamingEntry = null;
this._lastEntryType = OutputEntryType.StreamFooter;
return s with { ScrollAreaContentItems = new List<string>(this._outputItems) };
}
return s;
});
return Task.CompletedTask;
}
/// <inheritdoc/>
public Task WriteNoTextWarningAsync(bool hasFollowUpActions)
{
if (!this._hasReceivedAnyText && !hasFollowUpActions)
{
this.UpdateState(s =>
{
List<string> snapshot = this.AppendOutputEntriesAndSnapshot(new OutputEntry(
OutputEntryType.StreamFooter,
" (no text response from agent)\n",
ConsoleColor.DarkYellow));
return s with { ScrollAreaContentItems = snapshot };
});
}
return Task.CompletedTask;
}
/// <summary>
/// Wraps the supplied text with ANSI foreground color escape sequences (or returns
/// the text unchanged when no color is specified). Output is appended to
/// <see cref="_outputItems"/> and consumed verbatim by <see cref="TextScrollPanel"/>
/// and <see cref="TextPanel"/>.
/// </summary>
private static string RenderEntry(string text, ConsoleColor? color) =>
color.HasValue
? $"{AnsiEscapes.SetForegroundColor(color.Value)}{text}{AnsiEscapes.ResetAttributes}"
: text;
private void UpdateState(Func<HarnessAppComponentState, HarnessAppComponentState> update)
{
lock (this._stateLock)
{
this._setState(update(this._getState()));
}
}
private T UpdateState<T>(Func<HarnessAppComponentState, (HarnessAppComponentState State, T Result)> update)
{
lock (this._stateLock)
{
var (newState, result) = update(this._getState());
this._setState(newState);
return result;
}
}
/// <summary>
/// Appends one or more output entries to the output list, updates
/// <see cref="_lastEntryType"/> to the last entry's type, and returns a
/// snapshot of <see cref="_outputItems"/>. Must be called inside a locked
/// context (e.g. within an <see cref="UpdateState"/> callback).
/// </summary>
private List<string> AppendOutputEntriesAndSnapshot(params OutputEntry[] entries)
{
this.AppendOutputEntriesCore(entries);
return new List<string>(this._outputItems);
}
private void AppendOutputEntriesCore(OutputEntry[] entries)
{
foreach (OutputEntry entry in entries)
{
this._outputItems.Add(RenderEntry(entry.Text, entry.Color));
}
if (entries.Length > 0)
{
this._lastEntryType = entries[^1].Type;
}
}
/// <inheritdoc/>
public void RequestShutdown() => this._requestShutdown();
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/HarnessUXContainer.cs
-478
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@@ -1,478 +0,0 @@
// Copyright (c) Microsoft. All rights reserved.
using Harness.ConsoleReactiveComponents;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console;
/// <summary>
/// Event arguments raised when the user submits text while the bottom panel is in
/// streaming mode (i.e. an agent turn is in progress).
/// </summary>
public sealed class StreamingInputReceivedEventArgs : EventArgs
{
/// <summary>
/// Initializes a new instance of the <see cref="StreamingInputReceivedEventArgs"/> class.
/// </summary>
/// <param name="text">The submitted text.</param>
public StreamingInputReceivedEventArgs(string text)
{
this.Text = text;
}
/// <summary>
/// Gets the submitted text.
/// </summary>
public string Text { get; }
}
/// <summary>
/// Façade over the harness UI: owns the <see cref="HarnessAppComponent"/>, manages
/// its props, dispatches input submissions, and provides the high-level read/write
/// operations used by observers, command handlers, and the harness loop.
/// </summary>
/// <remarks>
/// All callers interact with the UI exclusively through this class. The underlying
/// <see cref="HarnessAppComponent"/> and its props are an implementation detail and
/// must not be exposed.
/// </remarks>
public sealed class HarnessUXContainer : IDisposable
{
/// <summary>
/// The prompt displayed in the bottom-panel input area.
/// </summary>
private const string UserPrompt = "> ";
private readonly IReadOnlyDictionary<string, ConsoleColor>? _modeColors;
private readonly List<object> _outputItems = [];
private readonly HarnessAppComponent _appComponent;
private readonly object _outputLock = new();
private TaskCompletionSource<string>? _pendingInputTcs;
private OutputEntryType? _lastEntryType;
private bool _hasReceivedAnyText;
private OutputEntry? _currentStreamingEntry;
private string? _currentMode;
/// <summary>
/// Initializes a new instance of the <see cref="HarnessUXContainer"/> class.
/// </summary>
/// <param name="placeholder">Placeholder text shown when the input is empty.</param>
/// <param name="initialMode">The current agent mode, used to colour the rule and prompt.</param>
/// <param name="inputEnabled">Whether the bottom-panel input accepts keystrokes during streaming.</param>
/// <param name="modeColors">Optional mapping of mode names to console colors.</param>
public HarnessUXContainer(
string placeholder,
string? initialMode,
bool inputEnabled,
IReadOnlyDictionary<string, ConsoleColor>? modeColors = null)
{
this._modeColors = modeColors;
this._currentMode = initialMode;
this._appComponent = new HarnessAppComponent(RenderOutputEntry)
{
Props = new HarnessAppComponentProps
{
ScrollItems = this._outputItems,
Mode = BottomPanelMode.TextInput,
Prompt = UserPrompt,
Placeholder = placeholder,
ModeColor = ModeColors.Get(initialMode, modeColors),
ModeText = initialMode,
InputEnabled = inputEnabled,
},
};
this._appComponent.InputSubmitted += this.OnInputSubmitted;
}
/// <summary>
/// Raised when the user submits text while the bottom panel is in streaming mode.
/// Subscribers typically enqueue the text into a message-injecting chat client.
/// </summary>
public event EventHandler<StreamingInputReceivedEventArgs>? StreamingInputReceived;
/// <summary>
/// Gets or sets the current agent mode (e.g. "plan", "execute"). Updating this
/// also refreshes the rule colour and bottom-panel prompt to match the new mode.
/// </summary>
public string? CurrentMode
{
get => this._currentMode;
set
{
this._currentMode = value;
this._appComponent.Props = this._appComponent.Props! with
{
ModeColor = ModeColors.Get(value, this._modeColors),
ModeText = value,
};
this._appComponent.Render();
}
}
/// <summary>
/// Performs the initial screen clear, sets the help text in the mode-and-help bar,
/// and adds the title to the output area.
/// </summary>
/// <param name="title">The title displayed in the console header.</param>
/// <param name="commandHelpTexts">The command help strings displayed in the mode-and-help bar.</param>
/// <param name="messageInjectionActive">Whether streaming-time message injection is enabled.</param>
public void Initialize(string title, IEnumerable<string> commandHelpTexts, bool messageInjectionActive)
{
// Set the help text on the mode-and-help bar (persists below the rule).
this._appComponent.Props = this._appComponent.Props! with
{
HelpText = string.Join(", ", commandHelpTexts),
ModeText = this._currentMode,
};
System.Console.Write(AnsiEscapes.EraseEntireScreen);
System.Console.Write(AnsiEscapes.EraseScrollbackBuffer);
this._appComponent.Render();
this.AppendOutputEntries(
new OutputEntry(OutputEntryType.InfoLine, $"=== {title} ===\n", ConsoleColor.White),
new OutputEntry(OutputEntryType.InfoLine, "\n"));
}
/// <summary>
/// Restores the cursor and exits the alternate screen, ending the interactive UI.
/// </summary>
public void Deactivate() => this._appComponent.Deactivate();
/// <summary>
/// Switches the bottom panel to streaming mode and starts the spinner.
/// </summary>
public void BeginStreaming()
{
this._appComponent.Props = this._appComponent.Props! with
{
Mode = BottomPanelMode.Streaming,
ShowSpinner = true,
};
this._appComponent.Render();
}
/// <summary>
/// Stops the spinner without leaving streaming mode. Use between the end of the
/// stream and any observer-driven prompts (e.g. tool approvals).
/// </summary>
public void StopSpinner()
{
this._appComponent.Props = this._appComponent.Props! with { ShowSpinner = false };
this._appComponent.Render();
}
/// <summary>
/// Switches the bottom panel back to text-input mode and stops the spinner.
/// </summary>
public void EndStreaming()
{
this._appComponent.Props = this._appComponent.Props! with
{
Mode = BottomPanelMode.TextInput,
ShowSpinner = false,
};
this._appComponent.Render();
}
/// <summary>
/// Resets per-turn streaming bookkeeping in preparation for a new agent turn.
/// </summary>
public void BeginStreamingOutput()
{
this._hasReceivedAnyText = false;
this._currentStreamingEntry = null;
}
/// <summary>
/// Sets the formatted usage text shown on the agent status bar.
/// </summary>
public void SetUsageText(string usageText)
{
this._appComponent.Props = this._appComponent.Props! with { UsageText = usageText };
this._appComponent.Render();
}
/// <summary>
/// Clears the usage text from the agent status bar.
/// </summary>
public void ClearUsageText()
{
this._appComponent.Props = this._appComponent.Props! with { UsageText = null };
this._appComponent.Render();
}
/// <summary>
/// Replaces the queued-message display with one entry per pending message.
/// </summary>
public void ShowQueuedMessages(IReadOnlyList<ChatMessage> pending)
{
var newQueued = new List<object>(pending.Count);
foreach (var msg in pending)
{
string text = msg.Text ?? string.Empty;
newQueued.Add(new OutputEntry(OutputEntryType.UserInput, $" 💬 {text}\n", ConsoleColor.DarkGray));
}
this._appComponent.Props = this._appComponent.Props! with { QueuedItems = newQueued };
this._appComponent.Render();
}
/// <summary>
/// Echoes a submitted user input as a regular user-input entry in the output area,
/// using the current mode-aware prompt prefix.
/// </summary>
/// <param name="text">The user-entered text.</param>
public void WriteUserInputEcho(string text)
{
this.AppendOutputEntries(new OutputEntry(
OutputEntryType.UserInput,
$"\nYou: {text}\n",
ConsoleColor.Green));
}
/// <summary>
/// Writes informational output as an output entry, without a trailing newline.
/// </summary>
public Task WriteInfoAsync(string text, ConsoleColor? color = null) =>
this.WriteInfoCoreAsync(text, color, newLine: false);
/// <summary>
/// Writes informational output as an output entry, followed by a newline.
/// </summary>
public Task WriteInfoLineAsync(string text, ConsoleColor? color = null) =>
this.WriteInfoCoreAsync(text, color, newLine: true);
private Task WriteInfoCoreAsync(string text, ConsoleColor? color, bool newLine)
{
// Add a blank line separator when transitioning from streaming text or user input.
string prefix = this._lastEntryType is OutputEntryType.StreamingText or OutputEntryType.StreamFooter
? "\n\n "
: " ";
string fullText = newLine ? prefix + text + "\n" : prefix + text;
this.AppendOutputEntries(new OutputEntry(
OutputEntryType.InfoLine,
fullText,
color ?? ModeColors.Get(this.CurrentMode, this._modeColors)));
return Task.CompletedTask;
}
/// <summary>
/// Writes streaming text output from the agent. Successive calls accumulate into a
/// single streaming entry that is re-rendered by the text panel.
/// </summary>
public Task WriteTextAsync(string text, ConsoleColor? color = null)
{
lock (this._outputLock)
{
this._lastEntryType = OutputEntryType.StreamingText;
this._hasReceivedAnyText = true;
ConsoleColor effectiveColor = color ?? ModeColors.Get(this.CurrentMode, this._modeColors);
if (this._currentStreamingEntry is not null)
{
this._currentStreamingEntry = this._currentStreamingEntry with
{
Text = this._currentStreamingEntry.Text + text,
};
this._outputItems[^1] = this._currentStreamingEntry;
}
else
{
const string Prefix = "\n";
this._currentStreamingEntry = new OutputEntry(OutputEntryType.StreamingText, Prefix + text, effectiveColor);
this._outputItems.Add(this._currentStreamingEntry);
}
this._appComponent.Props = this._appComponent.Props! with
{
ScrollItems = new List<object>(this._outputItems),
};
}
this._appComponent.Render();
return Task.CompletedTask;
}
/// <summary>
/// Writes a blank-line separator to visually close the streaming output section.
/// Call before observer completions so their output is visually separated.
/// </summary>
public Task EndStreamingOutputAsync()
{
lock (this._outputLock)
{
this._outputItems.Add(new OutputEntry(OutputEntryType.StreamFooter, "\n"));
this._currentStreamingEntry = null;
this._lastEntryType = OutputEntryType.StreamFooter;
this._appComponent.Props = this._appComponent.Props! with
{
ScrollItems = new List<object>(this._outputItems),
};
}
this._appComponent.Render();
return Task.CompletedTask;
}
/// <summary>
/// Shows a "(no text response from agent)" warning if no text was received
/// and no observer produced follow-up messages. Call after observer completions.
/// </summary>
/// <param name="hasFollowUpMessages">Whether any observer produced follow-up messages.</param>
public Task WriteNoTextWarningAsync(bool hasFollowUpMessages)
{
if (!this._hasReceivedAnyText && !hasFollowUpMessages)
{
this.AppendOutputEntries(new OutputEntry(
OutputEntryType.StreamFooter,
" (no text response from agent)\n",
ConsoleColor.DarkYellow));
}
return Task.CompletedTask;
}
/// <summary>
/// Reads a line of input from the user. If <paramref name="prompt"/> is supplied
/// it is rendered as an info line above the input row before reading.
/// </summary>
public async Task<string?> ReadLineAsync(string? prompt = null, ConsoleColor? promptColor = null)
{
if (prompt is not null)
{
ConsoleColor ruleColor = ModeColors.Get(this.CurrentMode, this._modeColors);
this.AppendOutputEntries(
new OutputEntry(OutputEntryType.InfoLine, "\n", ruleColor),
new OutputEntry(OutputEntryType.InfoLine, $" {prompt}", promptColor ?? ruleColor));
}
this._appComponent.Props = this._appComponent.Props! with { Mode = BottomPanelMode.TextInput };
this._appComponent.Render();
string input = await this.WaitForInputAsync();
this.AppendOutputEntries(new OutputEntry(
OutputEntryType.UserInput,
$"\nYou: {input}\n",
ConsoleColor.Green));
return input;
}
/// <summary>
/// Presents a selection prompt with the given choices and waits for the user's
/// selection. The title is displayed above the list in the bottom panel. After
/// selection the bottom panel is restored to text-input mode and both the question
/// and selection are echoed in the output area.
/// </summary>
public async Task<string> ReadSelectionAsync(string title, IList<string> choices)
{
this._appComponent.Props = this._appComponent.Props! with
{
Mode = BottomPanelMode.ListSelection,
Items = choices.ToList(),
ListTitle = title,
ListCustomTextPlaceholder = "✏️ Type a custom response...",
};
this._appComponent.Render();
string selection = await this.WaitForInputAsync();
this._appComponent.Props = this._appComponent.Props with { Mode = BottomPanelMode.TextInput };
this.AppendOutputEntries(
new OutputEntry(
OutputEntryType.InfoLine,
$"\n {title}\n",
ModeColors.Get(this.CurrentMode, this._modeColors)),
new OutputEntry(
OutputEntryType.UserInput,
$"\nYou: {selection}\n",
ConsoleColor.Green));
return selection;
}
/// <summary>
/// Awaits the next non-streaming user input submission.
/// </summary>
public Task<string> WaitForInputAsync()
{
this._pendingInputTcs = new TaskCompletionSource<string>(TaskCreationOptions.RunContinuationsAsynchronously);
return this._pendingInputTcs.Task;
}
private void OnInputSubmitted(object? sender, InputSubmittedEventArgs e)
{
if (e.Mode == BottomPanelMode.Streaming)
{
this.StreamingInputReceived?.Invoke(this, new StreamingInputReceivedEventArgs(e.Text));
}
else
{
var waiter = this._pendingInputTcs;
this._pendingInputTcs = null;
waiter?.TrySetResult(e.Text);
}
}
/// <inheritdoc/>
public void Dispose()
{
this._appComponent.InputSubmitted -= this.OnInputSubmitted;
this._appComponent.Deactivate();
this._appComponent.Dispose();
}
/// <summary>
/// Renders an <see cref="OutputEntry"/> to a string with ANSI color codes.
/// Used as the render delegate for the <see cref="HarnessAppComponent"/>.
/// </summary>
private static string RenderOutputEntry(object item)
{
if (item is not OutputEntry entry)
{
return item?.ToString() ?? string.Empty;
}
if (entry.Color.HasValue)
{
return $"{AnsiEscapes.SetForegroundColor(entry.Color.Value)}{entry.Text}{AnsiEscapes.ResetAttributes}";
}
return entry.Text;
}
/// <summary>
/// Appends one or more output entries to the output list under lock,
/// updates <see cref="_lastEntryType"/> to the last entry's type, and renders.
/// </summary>
private void AppendOutputEntries(params OutputEntry[] entries)
{
lock (this._outputLock)
{
foreach (OutputEntry entry in entries)
{
this._outputItems.Add(entry);
}
if (entries.Length > 0)
{
this._lastEntryType = entries[^1].Type;
}
this._appComponent.Props = this._appComponent.Props! with
{
ScrollItems = new List<object>(this._outputItems),
};
}
this._appComponent.Render();
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/IUXStateDriver.cs
+120
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@@ -0,0 +1,120 @@
// Copyright (c) Microsoft. All rights reserved.
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console;
/// <summary>
/// Abstraction over the harness UI state. All callers (observers, command handlers,
/// the agent runner) interact with the UI exclusively through this interface, which
/// internally translates each operation into a <c>SetState</c> call on the underlying
/// reactive component.
/// </summary>
/// <remarks>
/// This interface is intentionally narrow: it does not expose blocking input methods.
/// The agent runner orchestrates input flow via <see cref="FollowUpQuestion"/>
/// objects returned from observers.
/// </remarks>
public interface IUXStateDriver
{
/// <summary>
/// Gets or sets the current agent mode (e.g. "plan", "execute"). Setting also
/// refreshes the rule colour and bottom-panel prompt to match the new mode.
/// </summary>
string? CurrentMode { get; set; }
/// <summary>
/// Echoes a submitted user input as a regular user-input entry in the output area.
/// </summary>
void WriteUserInputEcho(string text);
/// <summary>
/// Writes informational output as an output entry, without a trailing newline.
/// </summary>
Task WriteInfoAsync(string text, ConsoleColor? color = null);
/// <summary>
/// Writes informational output as an output entry, followed by a newline.
/// </summary>
Task WriteInfoLineAsync(string text, ConsoleColor? color = null);
/// <summary>
/// Writes streaming text output from the agent. Successive calls accumulate into a
/// single streaming entry that is re-rendered by the text panel.
/// </summary>
Task WriteTextAsync(string text, ConsoleColor? color = null);
/// <summary>
/// Writes a blank-line separator to visually close the streaming output section.
/// </summary>
Task EndStreamingOutputAsync();
/// <summary>
/// Shows a "(no text response from agent)" warning if no text was received
/// and no observer produced follow-up actions.
/// </summary>
Task WriteNoTextWarningAsync(bool hasFollowUpActions);
/// <summary>
/// Switches the bottom panel to streaming mode and starts the spinner.
/// </summary>
void BeginStreaming();
/// <summary>
/// Stops the spinner without leaving streaming mode.
/// </summary>
void StopSpinner();
/// <summary>
/// Switches the bottom panel back to text-input mode and stops the spinner.
/// </summary>
void EndStreaming();
/// <summary>
/// Resets per-turn streaming bookkeeping in preparation for a new agent turn.
/// </summary>
void BeginStreamingOutput();
/// <summary>
/// Sets the formatted usage text shown on the agent status bar.
/// </summary>
void SetUsageText(string usageText);
/// <summary>
/// Replaces the queued-message display with one entry per pending message.
/// </summary>
void SetQueuedMessages(IReadOnlyList<ChatMessage> pending);
/// <summary>
/// Appends the supplied questions to the pending follow-up question queue in
/// component state. If the queue was empty, the bottom-panel display is
/// reconfigured to present the new head question.
/// </summary>
void QueueFollowUpQuestions(IReadOnlyList<FollowUpQuestion> questions);
/// <summary>
/// Appends a message to the accumulated follow-up response list in component state.
/// Called by the runner for direct <see cref="FollowUpMessage"/> outputs and by
/// the component when a question's continuation produces a response.
/// </summary>
void AddFollowUpResponse(ChatMessage response);
/// <summary>
/// Pops the head of the pending follow-up question queue. Reconfigures the
/// bottom-panel display for the new head, or restores the default text-input
/// mode if the queue is now empty.
/// </summary>
void AdvanceFollowUpQuestion();
/// <summary>
/// Returns the current accumulated follow-up responses and clears them in state.
/// Called by the runner immediately before invoking the next agent turn.
/// </summary>
IReadOnlyList<ChatMessage> TakeFollowUpResponses();
/// <summary>
/// Signals that the application should shut down. Completes the shutdown task
/// on the owning component.
/// </summary>
void RequestShutdown();
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Observers/ConsoleObserver.cs
+22 -17
View File
@@ -18,36 +18,41 @@ public abstract class ConsoleObserver
/// Override to set options such as <see cref="AgentRunOptions.ResponseFormat"/>.
/// </summary>
/// <param name="options">The run options to configure.</param>
public virtual void ConfigureRunOptions(AgentRunOptions options)
/// <param name="agent">The agent being interacted with.</param>
/// <param name="session">The current agent session.</param>
public virtual void ConfigureRunOptions(AgentRunOptions options, AIAgent agent, AgentSession session)
{
}
/// <summary>
/// Called for each <see cref="AIContent"/> item in the response stream.
/// </summary>
/// <param name="ux">The harness UX container, used for rendering output and interacting with the user.</param>
/// <param name="ux">The UX state driver, used for rendering output.</param>
/// <param name="content">The content item from the stream.</param>
public virtual Task OnContentAsync(HarnessUXContainer ux, AIContent content) => Task.CompletedTask;
/// <param name="agent">The agent being interacted with.</param>
/// <param name="session">The current agent session.</param>
public virtual Task OnContentAsync(IUXStateDriver ux, AIContent content, AIAgent agent, AgentSession session) => Task.CompletedTask;
/// <summary>
/// Called for each text update in the response stream.
/// </summary>
/// <param name="ux">The harness UX container, used for rendering output and interacting with the user.</param>
/// <param name="ux">The UX state driver, used for rendering output.</param>
/// <param name="text">The text from the update.</param>
public virtual Task OnTextAsync(HarnessUXContainer ux, string text) => Task.CompletedTask;
/// <summary>
/// Called after the response stream completes. Returns messages to include in the
/// next agent invocation, or <see langword="null"/> if no re-invocation is needed.
/// </summary>
/// <param name="ux">The harness UX container, used for rendering output and interacting with the user.</param>
/// <param name="agent">The agent being interacted with.</param>
/// <param name="session">The current agent session.</param>
/// <param name="options">The console options.</param>
/// <returns>Messages to send to the agent, or <see langword="null"/> if no action is needed.</returns>
public virtual Task<IList<ChatMessage>?> OnStreamCompleteAsync(
HarnessUXContainer ux,
public virtual Task OnTextAsync(IUXStateDriver ux, string text, AIAgent agent, AgentSession session) => Task.CompletedTask;
/// <summary>
/// Called after the response stream completes. Returns a heterogeneous list of
/// follow-up actions (questions to ask the user, and/or messages to add directly to
/// the next agent invocation), or <see langword="null"/> if no follow-up is needed.
/// </summary>
/// <param name="ux">The UX state driver, used for rendering output.</param>
/// <param name="agent">The agent being interacted with.</param>
/// <param name="session">The current agent session.</param>
/// <returns>Follow-up actions to process after the stream completes, or <see langword="null"/>.</returns>
public virtual Task<IList<FollowUpAction>?> OnStreamCompleteAsync(
IUXStateDriver ux,
AIAgent agent,
AgentSession session,
HarnessConsoleOptions options) => Task.FromResult<IList<ChatMessage>?>(null);
AgentSession session) => Task.FromResult<IList<FollowUpAction>?>(null);
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Observers/ErrorDisplayObserver.cs
+3 -2
View File
@@ -1,5 +1,6 @@
// Copyright (c) Microsoft. All rights reserved.
using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.Observers;
@@ -7,10 +8,10 @@ namespace Harness.Shared.Console.Observers;
/// <summary>
/// Displays error content (❌) from the response stream.
/// </summary>
internal sealed class ErrorDisplayObserver : ConsoleObserver
public sealed class ErrorDisplayObserver : ConsoleObserver
{
/// <inheritdoc/>
public override async Task OnContentAsync(HarnessUXContainer ux, AIContent content)
public override async Task OnContentAsync(IUXStateDriver ux, AIContent content, AIAgent agent, AgentSession session)
{
if (content is ErrorContent errorContent)
{
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Observers/PlanningOutputObserver.cs
+100 -55
View File
@@ -2,51 +2,77 @@
using System.Text;
using System.Text.Json;
using Harness.ConsoleReactiveComponents;
using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.Observers;
/// <summary>
/// Planning observer that configures structured output, collects streamed text,
/// and deserializes it as a <see cref="PlanningResponse"/>. Renders clarification
/// questions and approval prompts, and manages mode switching when the user approves a plan.
/// Planning observer that is mode-aware: in planning mode it configures structured
/// JSON output, collects streamed text, and deserializes it as a <see cref="PlanningResponse"/>;
/// in execution mode it passes text straight through to <see cref="IUXStateDriver.WriteTextAsync"/>
/// for live streaming display.
/// </summary>
internal sealed class PlanningOutputObserver : ConsoleObserver
public sealed class PlanningOutputObserver : ConsoleObserver
{
private readonly StringBuilder _textCollector = new();
private readonly AgentModeProvider _modeProvider;
private readonly string _planModeName;
private readonly string _executionModeName;
private readonly IReadOnlyDictionary<string, ConsoleColor>? _modeColors;
/// <summary>
/// Initializes a new instance of the <see cref="PlanningOutputObserver"/> class.
/// </summary>
/// <param name="modeProvider">The mode provider for switching modes on approval.</param>
public PlanningOutputObserver(AgentModeProvider modeProvider)
/// <param name="planModeName">The mode name that represents the planning mode.</param>
/// <param name="executionModeName">The mode name to switch to when the user approves a plan.</param>
/// <param name="modeColors">Optional mode-to-color mapping for display.</param>
public PlanningOutputObserver(AgentModeProvider modeProvider, string planModeName, string executionModeName, IReadOnlyDictionary<string, ConsoleColor>? modeColors = null)
{
this._modeProvider = modeProvider;
this._planModeName = planModeName;
this._executionModeName = executionModeName;
this._modeColors = modeColors;
}
/// <inheritdoc/>
public override void ConfigureRunOptions(AgentRunOptions options)
public override void ConfigureRunOptions(AgentRunOptions options, AIAgent agent, AgentSession session)
{
options.ResponseFormat = ChatResponseFormat.ForJsonSchema<PlanningResponse>();
if (this.IsPlanningMode(this._modeProvider.GetMode(session)))
{
options.ResponseFormat = ChatResponseFormat.ForJsonSchema<PlanningResponse>();
}
}
/// <inheritdoc/>
public override Task OnTextAsync(HarnessUXContainer ux, string text)
public override Task OnTextAsync(IUXStateDriver ux, string text, AIAgent agent, AgentSession session)
{
// Collect text silently instead of displaying it.
this._textCollector.Append(text);
return Task.CompletedTask;
if (this.IsPlanningMode(ux.CurrentMode))
{
// Planning mode: collect text silently for JSON parsing after the stream.
this._textCollector.Append(text);
return Task.CompletedTask;
}
// Execution mode: stream text directly to the console.
return ux.WriteTextAsync(text);
}
/// <inheritdoc/>
public override async Task<IList<ChatMessage>?> OnStreamCompleteAsync(
HarnessUXContainer ux,
public override async Task<IList<FollowUpAction>?> OnStreamCompleteAsync(
IUXStateDriver ux,
AIAgent agent,
AgentSession session,
HarnessConsoleOptions options)
AgentSession session)
{
if (!this.IsPlanningMode(ux.CurrentMode))
{
// Execution mode: text was already streamed live; nothing to parse.
this._textCollector.Clear();
return null;
}
// Read collected text from our stream observation.
string collectedText = this._textCollector.ToString();
this._textCollector.Clear();
@@ -75,10 +101,9 @@ internal sealed class PlanningOutputObserver : ConsoleObserver
return null;
}
// Render based on response type.
if (planningResponse.Type == PlanningResponseType.Clarification)
{
return AsUserMessages(await this.RenderClarificationsAndCollectResponsesAsync(ux, planningResponse));
return BuildClarificationActions(planningResponse);
}
if (planningResponse.Type == PlanningResponseType.Approval)
@@ -90,67 +115,87 @@ internal sealed class PlanningOutputObserver : ConsoleObserver
return null;
}
string response = await this.RenderApprovalAndCollectResponseAsync(ux, question, options);
if (response == "Approved")
{
this._modeProvider.SetMode(session, options.ExecutionModeName!);
await ux.WriteInfoLineAsync($"✅ Switched to {options.ExecutionModeName} mode.",
ModeColors.Get(options.ExecutionModeName, options.ModeColors));
}
return AsUserMessages(response);
return new List<FollowUpAction> { this.BuildApprovalAction(question, session) };
}
await ux.WriteInfoLineAsync($"(unexpected response type: {planningResponse.Type})", ConsoleColor.DarkYellow);
return null;
}
private static IList<ChatMessage>? AsUserMessages(string? text) =>
text is not null ? [new ChatMessage(ChatRole.User, text)] : null;
private async Task<string?> RenderClarificationsAndCollectResponsesAsync(HarnessUXContainer ux, PlanningResponse response)
private static List<FollowUpAction> BuildClarificationActions(PlanningResponse response)
{
var answers = new List<string>();
var actions = new List<FollowUpAction>(response.Questions.Count);
foreach (var question in response.Questions)
{
string? answer;
string prompt = question.Message;
async Task<ChatMessage?> Continuation(string answer, IUXStateDriver ux)
{
if (string.IsNullOrWhiteSpace(answer))
{
string noAnswer = $"🔹 {prompt}\n └─ {AnsiEscapes.SetForegroundColor(ConsoleColor.DarkGray)}(no answer){AnsiEscapes.ResetAttributes}";
await ux.WriteInfoLineAsync(noAnswer, ConsoleColor.Gray).ConfigureAwait(false);
return null;
}
string formatted = $"🔹 {prompt}\n └─ {AnsiEscapes.SetForegroundColor(ConsoleColor.Green)}{answer}{AnsiEscapes.ResetAttributes}";
await ux.WriteInfoLineAsync(formatted, ConsoleColor.Gray).ConfigureAwait(false);
return new ChatMessage(ChatRole.User, $"Q: {prompt}\nA: {answer}");
}
if (question.Choices is { Count: > 0 })
{
answer = await ux.ReadSelectionAsync(
question.Message,
question.Choices);
actions.Add(new ChoiceFollowUpQuestion(
Prompt: prompt,
Choices: question.Choices,
AllowCustomText: true,
Continuation: Continuation));
}
else
{
answer = (await ux.ReadLineAsync(question.Message))?.Trim();
}
if (!string.IsNullOrWhiteSpace(answer))
{
answers.Add($"Q: {question.Message}\nA: {answer}");
actions.Add(new TextFollowUpQuestion(
Prompt: prompt,
Continuation: Continuation));
}
}
return answers.Count > 0 ? string.Join("\n\n", answers) : null;
return actions;
}
private async Task<string> RenderApprovalAndCollectResponseAsync(HarnessUXContainer ux, PlanningQuestion question, HarnessConsoleOptions options)
private ChoiceFollowUpQuestion BuildApprovalAction(PlanningQuestion question, AgentSession session)
{
var choices = new List<string>
{
"Approve and switch to execute mode",
};
const string ApproveOption = "Approve and switch to execute mode";
var choices = new List<string> { ApproveOption };
string selection = await ux.ReadSelectionAsync(question.Message, choices);
return new ChoiceFollowUpQuestion(
Prompt: question.Message,
Choices: choices,
AllowCustomText: true,
Continuation: async (selection, ux) =>
{
string formatted = $"🔹 {question.Message}\n └─ {AnsiEscapes.SetForegroundColor(ConsoleColor.Green)}{selection}{AnsiEscapes.ResetAttributes}";
await ux.WriteInfoLineAsync(formatted, ConsoleColor.Gray).ConfigureAwait(false);
if (selection == choices[0])
{
return "Approved";
}
if (selection == ApproveOption)
{
this._modeProvider.SetMode(session, this._executionModeName);
await ux.WriteInfoLineAsync(
$"✅ Switched to {this._executionModeName} mode.",
ModeColors.Get(this._executionModeName, this._modeColors)).ConfigureAwait(false);
return new ChatMessage(ChatRole.User, "Approved");
}
// Custom freeform input — treat as suggested changes.
return selection;
// Custom freeform input — treat as suggested changes.
return new ChatMessage(ChatRole.User, selection);
});
}
/// <summary>
/// Returns <see langword="true"/> when the current mode matches the configured plan mode name.
/// A <see langword="null"/> mode (no mode provider) is also treated as planning mode.
/// </summary>
private bool IsPlanningMode(string? currentMode) =>
currentMode is null || string.Equals(currentMode, this._planModeName, StringComparison.OrdinalIgnoreCase);
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Observers/ReasoningDisplayObserver.cs
+3 -2
View File
@@ -1,5 +1,6 @@
// Copyright (c) Microsoft. All rights reserved.
using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.Observers;
@@ -7,10 +8,10 @@ namespace Harness.Shared.Console.Observers;
/// <summary>
/// Displays reasoning content in dark magenta from the response stream.
/// </summary>
internal sealed class ReasoningDisplayObserver : ConsoleObserver
public sealed class ReasoningDisplayObserver : ConsoleObserver
{
/// <inheritdoc/>
public override async Task OnContentAsync(HarnessUXContainer ux, AIContent content)
public override async Task OnContentAsync(IUXStateDriver ux, AIContent content, AIAgent agent, AgentSession session)
{
if (content is TextReasoningContent reasoning && !string.IsNullOrEmpty(reasoning.Text))
{
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Observers/TextOutputObserver.cs
+4 -2
View File
@@ -1,15 +1,17 @@
// Copyright (c) Microsoft. All rights reserved.
using Microsoft.Agents.AI;
namespace Harness.Shared.Console.Observers;
/// <summary>
/// Streams agent text output directly to the console.
/// Used in normal (non-planning) mode.
/// </summary>
internal sealed class TextOutputObserver : ConsoleObserver
public sealed class TextOutputObserver : ConsoleObserver
{
/// <inheritdoc/>
public override async Task OnTextAsync(HarnessUXContainer ux, string text)
public override async Task OnTextAsync(IUXStateDriver ux, string text, AIAgent agent, AgentSession session)
{
await ux.WriteTextAsync(text);
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Observers/ToolApprovalObserver.cs
+67 -48
View File
@@ -1,5 +1,7 @@
// Copyright (c) Microsoft. All rights reserved.
using Harness.ConsoleReactiveComponents;
using Harness.Shared.Console.ToolFormatters;
using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;
@@ -7,86 +9,103 @@ namespace Harness.Shared.Console.Observers;
/// <summary>
/// Collects <see cref="ToolApprovalRequestContent"/> items during the response stream,
/// displays approval-needed notifications inline, and prompts the user for approval
/// decisions after the stream completes.
/// displays approval-needed notifications inline, and after the stream completes returns
/// one <see cref="ChoiceFollowUpQuestion"/> per pending approval request. Each question's
/// continuation produces a separate <see cref="ChatMessage"/> carrying the approval
/// response content.
/// </summary>
internal sealed class ToolApprovalObserver : ConsoleObserver
public sealed class ToolApprovalObserver : ConsoleObserver
{
private readonly List<ToolApprovalRequestContent> _approvalRequests = [];
private readonly IReadOnlyList<ToolCallFormatter> _formatters;
/// <summary>
/// Initializes a new instance of the <see cref="ToolApprovalObserver"/> class.
/// </summary>
/// <param name="formatters">Optional list of tool formatters. When <see langword="null"/>,
/// the default formatters from <see cref="ToolCallFormatter.BuildDefaultToolFormatters"/> are used.</param>
public ToolApprovalObserver(IReadOnlyList<ToolCallFormatter>? formatters = null)
{
this._formatters = formatters ?? ToolCallFormatter.BuildDefaultToolFormatters();
}
/// <inheritdoc/>
public override async Task OnContentAsync(HarnessUXContainer ux, AIContent content)
public override async Task OnContentAsync(IUXStateDriver ux, AIContent content, AIAgent agent, AgentSession session)
{
if (content is ToolApprovalRequestContent approvalRequest)
{
this._approvalRequests.Add(approvalRequest);
string toolName = approvalRequest.ToolCall is FunctionCallContent fc
? ToolCallFormatter.Format(fc)
? ToolCallFormatter.Format(this._formatters, fc)
: approvalRequest.ToolCall?.ToString() ?? "unknown";
await ux.WriteInfoLineAsync($"⚠️ Approval needed: {toolName}", ConsoleColor.Yellow);
}
}
/// <inheritdoc/>
public override async Task<IList<ChatMessage>?> OnStreamCompleteAsync(
HarnessUXContainer ux,
public override Task<IList<FollowUpAction>?> OnStreamCompleteAsync(
IUXStateDriver ux,
AIAgent agent,
AgentSession session,
HarnessConsoleOptions options)
AgentSession session)
{
if (this._approvalRequests.Count == 0)
{
return null;
return Task.FromResult<IList<FollowUpAction>?>(null);
}
var actions = new List<FollowUpAction>(this._approvalRequests.Count);
foreach (var request in this._approvalRequests)
{
actions.Add(this.BuildApprovalQuestion(request));
}
var messages = await PromptForApprovalsAsync(ux, this._approvalRequests);
this._approvalRequests.Clear();
return messages;
return Task.FromResult<IList<FollowUpAction>?>(actions);
}
private static async Task<List<ChatMessage>?> PromptForApprovalsAsync(HarnessUXContainer ux, List<ToolApprovalRequestContent> approvalRequests)
private ChoiceFollowUpQuestion BuildApprovalQuestion(ToolApprovalRequestContent request)
{
if (approvalRequests.Count == 0)
string toolName = request.ToolCall is FunctionCallContent fc
? ToolCallFormatter.Format(this._formatters, fc)
: request.ToolCall?.ToString() ?? "unknown";
var choices = new List<string>
{
return null;
}
"Approve this call",
"Always approve this tool (any arguments)",
"Always approve this tool with these arguments",
"Deny",
};
var responses = new List<AIContent>();
foreach (var request in approvalRequests)
{
string toolName = request.ToolCall is FunctionCallContent fc
? ToolCallFormatter.Format(fc)
: request.ToolCall?.ToString() ?? "unknown";
string prompt = $"🔐 Tool approval: {toolName}";
var choices = new List<string>
return new ChoiceFollowUpQuestion(
Prompt: prompt,
Choices: choices,
AllowCustomText: false,
Continuation: async (selection, ux) =>
{
"Approve this call",
"Always approve this tool (any arguments)",
"Always approve this tool with these arguments",
"Deny",
};
AIContent response = selection switch
{
"Always approve this tool (any arguments)" => request.CreateAlwaysApproveToolResponse("User chose to always approve this tool"),
"Always approve this tool with these arguments" => request.CreateAlwaysApproveToolWithArgumentsResponse("User chose to always approve this tool with these arguments"),
"Deny" => request.CreateResponse(approved: false, reason: "User denied"),
_ => request.CreateResponse(approved: true, reason: "User approved"),
};
string selection = await ux.ReadSelectionAsync($"🔐 Tool approval: {toolName}", choices);
AIContent response = selection switch
{
"Always approve this tool (any arguments)" => request.CreateAlwaysApproveToolResponse("User chose to always approve this tool"),
"Always approve this tool with these arguments" => request.CreateAlwaysApproveToolWithArgumentsResponse("User chose to always approve this tool with these arguments"),
"Deny" => request.CreateResponse(approved: false, reason: "User denied"),
_ => request.CreateResponse(approved: true, reason: "User approved"),
};
string action = selection switch
{
"Always approve this tool (any arguments)" => "✅ Always approved (any args)",
"Always approve this tool with these arguments" => "✅ Always approved (these args)",
"Deny" => "❌ Denied",
_ => "✅ Approved",
};
string action = selection switch
{
"Always approve this tool (any arguments)" => "✅ Always approved (any args)",
"Always approve this tool with these arguments" => "✅ Always approved (these args)",
"Deny" => "❌ Denied",
_ => "✅ Approved",
};
await ux.WriteInfoLineAsync($" {action}", ConsoleColor.DarkGray);
ConsoleColor answerColor = selection == "Deny" ? ConsoleColor.Red : ConsoleColor.Green;
string formatted = $"🔹 {prompt}\n └─ {AnsiEscapes.SetForegroundColor(answerColor)}{action}{AnsiEscapes.ResetAttributes}";
await ux.WriteInfoLineAsync(formatted, ConsoleColor.Gray).ConfigureAwait(false);
responses.Add(response);
}
return [new ChatMessage(ChatRole.User, responses)];
return new ChatMessage(ChatRole.User, [response]);
});
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Observers/ToolCallDisplayObserver.cs
+17 -3
View File
@@ -1,5 +1,7 @@
// Copyright (c) Microsoft. All rights reserved.
using Harness.Shared.Console.ToolFormatters;
using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.Observers;
@@ -8,14 +10,26 @@ namespace Harness.Shared.Console.Observers;
/// Displays tool call notifications (🔧) for <see cref="FunctionCallContent"/>
/// and <see cref="ToolCallContent"/> items in the response stream.
/// </summary>
internal sealed class ToolCallDisplayObserver : ConsoleObserver
public sealed class ToolCallDisplayObserver : ConsoleObserver
{
private readonly IReadOnlyList<ToolCallFormatter> _formatters;
/// <summary>
/// Initializes a new instance of the <see cref="ToolCallDisplayObserver"/> class.
/// </summary>
/// <param name="formatters">Optional list of tool formatters. When <see langword="null"/>,
/// the default formatters from <see cref="ToolCallFormatter.BuildDefaultToolFormatters"/> are used.</param>
public ToolCallDisplayObserver(IReadOnlyList<ToolCallFormatter>? formatters = null)
{
this._formatters = formatters ?? ToolCallFormatter.BuildDefaultToolFormatters();
}
/// <inheritdoc/>
public override async Task OnContentAsync(HarnessUXContainer ux, AIContent content)
public override async Task OnContentAsync(IUXStateDriver ux, AIContent content, AIAgent agent, AgentSession session)
{
if (content is FunctionCallContent functionCall)
{
await ux.WriteInfoLineAsync($"🔧 Calling tool: {ToolCallFormatter.Format(functionCall)}...", ConsoleColor.DarkYellow);
await ux.WriteInfoLineAsync($"🔧 Calling tool: {ToolCallFormatter.Format(this._formatters, functionCall)}...", ConsoleColor.DarkYellow);
}
else if (content is ToolCallContent toolCall)
{
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Observers/ToolCallFormatter.cs
-288
View File
@@ -1,288 +0,0 @@
// Copyright (c) Microsoft. All rights reserved.
using System.Text;
using System.Text.Json;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.Observers;
/// <summary>
/// Formats <see cref="FunctionCallContent"/> instances into human-readable strings
/// for console display.
/// </summary>
public static class ToolCallFormatter
{
/// <summary>
/// Returns a formatted string for the given tool call, with human-readable
/// details for known tools (todos, mode, sub-agents, web tools).
/// </summary>
/// <param name="call">The function call content to format.</param>
/// <returns>A formatted string describing the tool call.</returns>
public static string Format(FunctionCallContent call)
{
string? detail = call.Name switch
{
// Todo tools
"TodoList_Add" => FormatAddTodos(call),
"TodoList_Complete" => FormatIdList(call, "ids", "Complete"),
"TodoList_Remove" => FormatIdList(call, "ids", "Remove"),
"TodoList_GetRemaining" => null,
"TodoList_GetAll" => null,
// Mode tools
"AgentMode_Set" => FormatStringArg(call, "mode"),
"AgentMode_Get" => null,
// Sub-agent tools
"SubAgents_StartTask" => FormatStartSubTask(call),
"SubAgents_WaitForFirstCompletion" => FormatIdList(call, "taskIds", "Wait for"),
"SubAgents_GetTaskResults" => FormatSingleId(call, "taskId"),
"SubAgents_GetAllTasks" => null,
"SubAgents_ContinueTask" => FormatContinueTask(call),
"SubAgents_ClearCompletedTask" => FormatSingleId(call, "taskId"),
// File memory tools
"FileMemory_SaveFile" => FormatSaveFile(call),
"FileMemory_ReadFile" => FormatStringArg(call, "fileName"),
"FileMemory_DeleteFile" => FormatStringArg(call, "fileName"),
"FileMemory_ListFiles" => null,
"FileMemory_SearchFiles" => FormatSearchFiles(call),
// External tools
"web_search" => FormatStringArg(call, "query"),
"DownloadUri" => FormatStringArg(call, "uri"),
_ => FormatFallback(call),
};
return detail is not null ? $"{call.Name} {detail}" : call.Name;
}
private static string? FormatAddTodos(FunctionCallContent call)
{
if (call.Arguments?.TryGetValue("todos", out object? todosObj) != true || todosObj is null)
{
return null;
}
var titles = new List<string>();
if (todosObj is JsonElement jsonArray && jsonArray.ValueKind == JsonValueKind.Array)
{
foreach (JsonElement item in jsonArray.EnumerateArray())
{
string? title = item.TryGetProperty("title", out JsonElement titleElement)
? titleElement.GetString()
: null;
if (!string.IsNullOrEmpty(title))
{
titles.Add(title);
}
}
}
if (titles.Count == 0)
{
return null;
}
var sb = new StringBuilder();
sb.Append($"({titles.Count} item{(titles.Count == 1 ? "" : "s")})");
foreach (string title in titles)
{
sb.Append($"\n • {title}");
}
return sb.ToString();
}
private static string? FormatIdList(FunctionCallContent call, string paramName, string verb)
{
List<int>? ids = GetIntList(call, paramName);
if (ids is null || ids.Count == 0)
{
return null;
}
return $"({verb} #{string.Join(", #", ids)})";
}
private static string? FormatSingleId(FunctionCallContent call, string paramName)
{
int? id = GetInt(call, paramName);
return id.HasValue ? $"(task #{id.Value})" : null;
}
private static string? FormatStartSubTask(FunctionCallContent call)
{
string? agentName = GetString(call, "agentName");
string? description = GetString(call, "description");
if (agentName is null && description is null)
{
return null;
}
var sb = new StringBuilder("(");
if (agentName is not null)
{
sb.Append($"agent: {agentName}");
}
if (description is not null)
{
if (agentName is not null)
{
sb.Append(", ");
}
sb.Append($"\"{Truncate(description, 60)}\"");
}
sb.Append(')');
return sb.ToString();
}
private static string? FormatContinueTask(FunctionCallContent call)
{
int? taskId = GetInt(call, "taskId");
string? text = GetString(call, "text");
if (!taskId.HasValue)
{
return null;
}
return text is not null
? $"(task #{taskId.Value}, \"{Truncate(text, 50)}\")"
: $"(task #{taskId.Value})";
}
private static string? FormatSaveFile(FunctionCallContent call)
{
string? fileName = GetString(call, "fileName");
string? description = GetString(call, "description");
if (fileName is null)
{
return null;
}
return string.IsNullOrEmpty(description)
? $"({fileName})"
: $"({fileName}, with description)";
}
private static string? FormatSearchFiles(FunctionCallContent call)
{
string? pattern = GetString(call, "regexPattern");
string? filePattern = GetString(call, "filePattern");
if (pattern is null)
{
return null;
}
return string.IsNullOrEmpty(filePattern)
? $"(/{pattern}/)"
: $"(/{pattern}/ in {filePattern})";
}
private static string? FormatStringArg(FunctionCallContent call, string paramName)
{
string? value = GetString(call, paramName);
return value is not null ? $"({value})" : null;
}
private static string? FormatFallback(FunctionCallContent call)
{
if (call.Arguments is null || call.Arguments.Count == 0)
{
return null;
}
var parts = new List<string>();
foreach (var kvp in call.Arguments)
{
string? stringValue = kvp.Value switch
{
JsonElement je => je.ValueKind switch
{
JsonValueKind.String => je.GetString(),
JsonValueKind.Number => je.GetRawText(),
JsonValueKind.True => "true",
JsonValueKind.False => "false",
_ => null,
},
not null => kvp.Value.ToString(),
_ => null,
};
if (stringValue is not null)
{
parts.Add($"{kvp.Key}: {Truncate(stringValue, 40)}");
}
}
return parts.Count > 0 ? $"({string.Join(", ", parts)})" : null;
}
private static string? GetString(FunctionCallContent call, string paramName)
{
if (call.Arguments?.TryGetValue(paramName, out object? value) != true || value is null)
{
return null;
}
return value switch
{
JsonElement je when je.ValueKind == JsonValueKind.String => je.GetString(),
string s => s,
_ => value.ToString(),
};
}
private static int? GetInt(FunctionCallContent call, string paramName)
{
if (call.Arguments?.TryGetValue(paramName, out object? value) != true || value is null)
{
return null;
}
return value switch
{
JsonElement je when je.ValueKind == JsonValueKind.Number => je.GetInt32(),
int i => i,
_ => int.TryParse(value.ToString(), out int parsed) ? parsed : null,
};
}
private static List<int>? GetIntList(FunctionCallContent call, string paramName)
{
if (call.Arguments?.TryGetValue(paramName, out object? value) != true || value is null)
{
return null;
}
var result = new List<int>();
if (value is JsonElement je && je.ValueKind == JsonValueKind.Array)
{
foreach (JsonElement item in je.EnumerateArray())
{
if (item.ValueKind == JsonValueKind.Number)
{
result.Add(item.GetInt32());
}
}
}
return result.Count > 0 ? result : null;
}
private static string Truncate(string text, int maxLength)
{
return text.Length <= maxLength ? text : string.Concat(text.AsSpan(0, maxLength), "…");
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/Observers/UsageDisplayObserver.cs
+3 -2
View File
@@ -1,5 +1,6 @@
// Copyright (c) Microsoft. All rights reserved.
using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.Observers;
@@ -7,7 +8,7 @@ namespace Harness.Shared.Console.Observers;
/// <summary>
/// Displays token usage statistics (📊) from the response stream.
/// </summary>
internal sealed class UsageDisplayObserver : ConsoleObserver
public sealed class UsageDisplayObserver : ConsoleObserver
{
private readonly int? _maxContextWindowTokens;
private readonly int? _maxOutputTokens;
@@ -24,7 +25,7 @@ internal sealed class UsageDisplayObserver : ConsoleObserver
}
/// <inheritdoc/>
public override Task OnContentAsync(HarnessUXContainer ux, AIContent content)
public override Task OnContentAsync(IUXStateDriver ux, AIContent content, AIAgent agent, AgentSession session)
{
if (content is UsageContent usage)
{
dotnet/samples/02-agents/Harness/Harness_Shared_Console/OutputEntry.cs
+4 -3
View File
@@ -5,7 +5,7 @@ namespace Harness.Shared.Console;
/// <summary>
/// Represents the type of an output entry in the console conversation.
/// </summary>
public enum OutputEntryType
internal enum OutputEntryType
{
/// <summary>User input echo (e.g. "You: hello").</summary>
UserInput,
@@ -25,9 +25,10 @@ public enum OutputEntryType
/// <summary>
/// Represents a single output entry in the console conversation history.
/// These entries are rendered by the <see cref="HarnessAppComponent"/> via its render delegate.
/// Used internally by <see cref="HarnessConsoleUXStateDriver"/> to track
/// the in-progress streaming entry and last-entry type for spacing decisions.
/// </summary>
/// <param name="Type">The type of output entry.</param>
/// <param name="Text">The text content of the entry.</param>
/// <param name="Color">Optional foreground color for rendering.</param>
public record OutputEntry(OutputEntryType Type, string Text, ConsoleColor? Color = null);
internal sealed record OutputEntry(OutputEntryType Type, string Text, ConsoleColor? Color = null);
dotnet/samples/02-agents/Harness/Harness_Shared_Console/ToolFormatters/FallbackToolFormatter.cs
+51
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@@ -0,0 +1,51 @@
// Copyright (c) Microsoft. All rights reserved.
using System.Text.Json;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.ToolFormatters;
/// <summary>
/// Catch-all formatter that handles any tool not matched by a more specific formatter.
/// Displays a generic summary of the tool's arguments. This formatter should always be
/// placed last in the formatter list.
/// </summary>
public sealed class FallbackToolFormatter : ToolCallFormatter
{
/// <inheritdoc/>
public override bool CanFormat(FunctionCallContent call) => true;
/// <inheritdoc/>
public override string? FormatDetail(FunctionCallContent call)
{
if (call.Arguments is null || call.Arguments.Count == 0)
{
return null;
}
var parts = new List<string>();
foreach (var kvp in call.Arguments)
{
string? stringValue = kvp.Value switch
{
JsonElement je => je.ValueKind switch
{
JsonValueKind.String => je.GetString(),
JsonValueKind.Number => je.GetRawText(),
JsonValueKind.True => "true",
JsonValueKind.False => "false",
_ => null,
},
not null => kvp.Value.ToString(),
_ => null,
};
if (stringValue is not null)
{
parts.Add($"{kvp.Key}: {Truncate(stringValue, 40)}");
}
}
return parts.Count > 0 ? $"({string.Join(", ", parts)})" : null;
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/ToolFormatters/FileMemoryToolFormatter.cs
+61
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@@ -0,0 +1,61 @@
// Copyright (c) Microsoft. All rights reserved.
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.ToolFormatters;
/// <summary>
/// Formats <c>FileMemory_*</c> tool calls, showing file names and search patterns
/// with tree-view corners for save operations.
/// </summary>
public sealed class FileMemoryToolFormatter : ToolCallFormatter
{
/// <inheritdoc/>
public override bool CanFormat(FunctionCallContent call) => call.Name.StartsWith("FileMemory_", StringComparison.Ordinal);
/// <inheritdoc/>
public override string? FormatDetail(FunctionCallContent call) => call.Name switch
{
"FileMemory_SaveFile" => FormatSaveFile(call),
"FileMemory_ReadFile" => FormatStringArg(call, "fileName"),
"FileMemory_DeleteFile" => FormatStringArg(call, "fileName"),
"FileMemory_SearchFiles" => FormatSearchFiles(call),
_ => null,
};
private static string? FormatSaveFile(FunctionCallContent call)
{
string? fileName = GetStringArgumentValue(call, "fileName");
string? description = GetStringArgumentValue(call, "description");
if (fileName is null)
{
return null;
}
return string.IsNullOrEmpty(description)
? $"\n └─ {fileName}"
: $"\n └─ {fileName} (with description)";
}
private static string? FormatSearchFiles(FunctionCallContent call)
{
string? pattern = GetStringArgumentValue(call, "regexPattern");
string? filePattern = GetStringArgumentValue(call, "filePattern");
if (pattern is null)
{
return null;
}
return string.IsNullOrEmpty(filePattern)
? $"(/{pattern}/)"
: $"(/{pattern}/ in {filePattern})";
}
private static string? FormatStringArg(FunctionCallContent call, string paramName)
{
string? value = GetStringArgumentValue(call, paramName);
return value is not null ? $"({value})" : null;
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/ToolFormatters/ModeToolFormatter.cs
+27
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@@ -0,0 +1,27 @@
// Copyright (c) Microsoft. All rights reserved.
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.ToolFormatters;
/// <summary>
/// Formats <c>AgentMode_*</c> tool calls, showing the target mode for Set operations.
/// </summary>
public sealed class ModeToolFormatter : ToolCallFormatter
{
/// <inheritdoc/>
public override bool CanFormat(FunctionCallContent call) => call.Name.StartsWith("AgentMode_", StringComparison.Ordinal);
/// <inheritdoc/>
public override string? FormatDetail(FunctionCallContent call) => call.Name switch
{
"AgentMode_Set" => FormatStringArg(call, "mode"),
_ => null,
};
private static string? FormatStringArg(FunctionCallContent call, string paramName)
{
string? value = GetStringArgumentValue(call, paramName);
return value is not null ? $"({value})" : null;
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/ToolFormatters/SubAgentToolFormatter.cs
+101
View File
@@ -0,0 +1,101 @@
// Copyright (c) Microsoft. All rights reserved.
using System.Text;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.ToolFormatters;
/// <summary>
/// Formats <c>SubAgents_*</c> tool calls with human-readable details
/// for task start, continue, wait, and result retrieval operations.
/// </summary>
public sealed class SubAgentToolFormatter : ToolCallFormatter
{
/// <inheritdoc/>
public override bool CanFormat(FunctionCallContent call) => call.Name.StartsWith("SubAgents_", StringComparison.Ordinal);
/// <inheritdoc/>
public override string? FormatDetail(FunctionCallContent call) => call.Name switch
{
"SubAgents_StartTask" => FormatStartSubTask(call),
"SubAgents_WaitForFirstCompletion" => FormatIdList(call, "taskIds", "Wait for"),
"SubAgents_GetTaskResults" => FormatSingleId(call, "taskId"),
"SubAgents_ContinueTask" => FormatContinueTask(call),
"SubAgents_ClearCompletedTask" => FormatSingleId(call, "taskId"),
_ => null,
};
private static string? FormatStartSubTask(FunctionCallContent call)
{
string? agentName = GetStringArgumentValue(call, "agentName");
string? description = GetStringArgumentValue(call, "description");
if (agentName is null && description is null)
{
return null;
}
var sb = new StringBuilder();
if (agentName is not null && description is not null)
{
sb.Append($"\n ├─ Agent: {agentName}");
sb.Append($"\n └─ \"{Truncate(description, 80)}\"");
}
else if (agentName is not null)
{
sb.Append($"\n └─ Agent: {agentName}");
}
else
{
sb.Append($"\n └─ \"{Truncate(description!, 80)}\"");
}
return sb.ToString();
}
private static string? FormatIdList(FunctionCallContent call, string paramName, string verb)
{
List<int>? ids = GetIntListArgumentValue(call, paramName);
if (ids is null || ids.Count == 0)
{
return null;
}
var sb = new StringBuilder();
for (int i = 0; i < ids.Count; i++)
{
string connector = i < ids.Count - 1 ? "├─" : "└─";
sb.Append($"\n {connector} {verb} #{ids[i]}");
}
return sb.ToString();
}
private static string? FormatSingleId(FunctionCallContent call, string paramName)
{
int? id = GetIntArgumentValue(call, paramName);
return id.HasValue ? $"(task #{id.Value})" : null;
}
private static string? FormatContinueTask(FunctionCallContent call)
{
int? taskId = GetIntArgumentValue(call, "taskId");
string? text = GetStringArgumentValue(call, "text");
if (!taskId.HasValue)
{
return null;
}
if (text is not null)
{
var sb = new StringBuilder();
sb.Append($"\n ├─ Task #{taskId.Value}");
sb.Append($"\n └─ \"{Truncate(text, 80)}\"");
return sb.ToString();
}
return $"\n └─ Task #{taskId.Value}";
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/ToolFormatters/TodoToolFormatter.cs
+84
View File
@@ -0,0 +1,84 @@
// Copyright (c) Microsoft. All rights reserved.
using System.Text;
using System.Text.Json;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.ToolFormatters;
/// <summary>
/// Formats <c>TodoList_*</c> tool calls with tree-view output for added items
/// and structured output for complete/remove operations.
/// </summary>
public sealed class TodoToolFormatter : ToolCallFormatter
{
/// <inheritdoc/>
public override bool CanFormat(FunctionCallContent call) => call.Name.StartsWith("TodoList_", StringComparison.Ordinal);
/// <inheritdoc/>
public override string? FormatDetail(FunctionCallContent call) => call.Name switch
{
"TodoList_Add" => FormatAddTodos(call),
"TodoList_Complete" => FormatIdList(call, "ids", "Complete"),
"TodoList_Remove" => FormatIdList(call, "ids", "Remove"),
_ => null,
};
private static string? FormatAddTodos(FunctionCallContent call)
{
if (call.Arguments?.TryGetValue("todos", out object? todosObj) != true || todosObj is null)
{
return null;
}
var titles = new List<string>();
if (todosObj is JsonElement jsonArray && jsonArray.ValueKind == JsonValueKind.Array)
{
foreach (JsonElement item in jsonArray.EnumerateArray())
{
string? title = item.TryGetProperty("title", out JsonElement titleElement)
? titleElement.GetString()
: null;
if (!string.IsNullOrEmpty(title))
{
titles.Add(title);
}
}
}
if (titles.Count == 0)
{
return null;
}
var sb = new StringBuilder();
sb.Append($"({titles.Count} item{(titles.Count == 1 ? "" : "s")})");
for (int i = 0; i < titles.Count; i++)
{
string connector = i < titles.Count - 1 ? "├─" : "└─";
sb.Append($"\n {connector} {titles[i]}");
}
return sb.ToString();
}
private static string? FormatIdList(FunctionCallContent call, string paramName, string verb)
{
List<int>? ids = GetIntListArgumentValue(call, paramName);
if (ids is null || ids.Count == 0)
{
return null;
}
var sb = new StringBuilder();
for (int i = 0; i < ids.Count; i++)
{
string connector = i < ids.Count - 1 ? "├─" : "└─";
sb.Append($"\n {connector} {verb} #{ids[i]}");
}
return sb.ToString();
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/ToolFormatters/ToolCallFormatter.cs
+135
View File
@@ -0,0 +1,135 @@
// Copyright (c) Microsoft. All rights reserved.
using System.Text.Json;
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.ToolFormatters;
/// <summary>
/// Base class for tool call formatters that produce human-readable display strings
/// for <see cref="FunctionCallContent"/> items shown in the console.
/// </summary>
public abstract class ToolCallFormatter
{
/// <summary>
/// Returns <see langword="true"/> if this formatter can handle the given function call.
/// </summary>
/// <param name="call">The function call content to check.</param>
/// <returns><see langword="true"/> if this formatter should be used; otherwise <see langword="false"/>.</returns>
public abstract bool CanFormat(FunctionCallContent call);
/// <summary>
/// Returns the detail portion of the formatted output for the given tool call,
/// or <see langword="null"/> if only the tool name should be displayed.
/// </summary>
/// <param name="call">The function call content to format.</param>
/// <returns>A detail string to append after the tool name, or <see langword="null"/>.</returns>
public abstract string? FormatDetail(FunctionCallContent call);
/// <summary>
/// Formats a tool call using the first matching formatter from the provided list.
/// Returns <c>"{toolName} {detail}"</c> when a formatter produces detail,
/// or just <c>"{toolName}"</c> otherwise.
/// </summary>
internal static string Format(IReadOnlyList<ToolCallFormatter> formatters, FunctionCallContent call)
{
foreach (var formatter in formatters)
{
if (formatter.CanFormat(call))
{
string? detail = formatter.FormatDetail(call);
return detail is not null ? $"{call.Name} {detail}" : call.Name;
}
}
return call.Name;
}
/// <summary>
/// Creates the default list of tool call formatters. The <see cref="FallbackToolFormatter"/>
/// is always last. Users can call this method and combine the result with their own formatters.
/// </summary>
/// <returns>A list of all built-in tool call formatters.</returns>
public static List<ToolCallFormatter> BuildDefaultToolFormatters()
{
return
[
new TodoToolFormatter(),
new ModeToolFormatter(),
new SubAgentToolFormatter(),
new FileMemoryToolFormatter(),
new WebSearchToolFormatter(),
new FallbackToolFormatter(),
];
}
/// <summary>
/// Extracts a string argument value from a function call.
/// </summary>
protected static string? GetStringArgumentValue(FunctionCallContent call, string paramName)
{
if (call.Arguments?.TryGetValue(paramName, out object? value) != true || value is null)
{
return null;
}
return value switch
{
JsonElement je when je.ValueKind == JsonValueKind.String => je.GetString(),
string s => s,
_ => value.ToString(),
};
}
/// <summary>
/// Extracts an integer argument value from a function call.
/// </summary>
protected static int? GetIntArgumentValue(FunctionCallContent call, string paramName)
{
if (call.Arguments?.TryGetValue(paramName, out object? value) != true || value is null)
{
return null;
}
return value switch
{
JsonElement je when je.ValueKind == JsonValueKind.Number => je.GetInt32(),
int i => i,
_ => int.TryParse(value.ToString(), out int parsed) ? parsed : null,
};
}
/// <summary>
/// Extracts a list of integer argument values from a function call.
/// </summary>
protected static List<int>? GetIntListArgumentValue(FunctionCallContent call, string paramName)
{
if (call.Arguments?.TryGetValue(paramName, out object? value) != true || value is null)
{
return null;
}
var result = new List<int>();
if (value is JsonElement je && je.ValueKind == JsonValueKind.Array)
{
foreach (JsonElement item in je.EnumerateArray())
{
if (item.ValueKind == JsonValueKind.Number)
{
result.Add(item.GetInt32());
}
}
}
return result.Count > 0 ? result : null;
}
/// <summary>
/// Truncates a string to the specified maximum length, appending an ellipsis if truncated.
/// </summary>
protected static string Truncate(string text, int maxLength)
{
return text.Length <= maxLength ? text : string.Concat(text.AsSpan(0, maxLength), "…");
}
}
dotnet/samples/02-agents/Harness/Harness_Shared_Console/ToolFormatters/WebSearchToolFormatter.cs
+22
View File
@@ -0,0 +1,22 @@
// Copyright (c) Microsoft. All rights reserved.
using Microsoft.Extensions.AI;
namespace Harness.Shared.Console.ToolFormatters;
/// <summary>
/// Formats <c>web_search</c> tool calls, showing the search query.
/// </summary>
public sealed class WebSearchToolFormatter : ToolCallFormatter
{
/// <inheritdoc/>
public override bool CanFormat(FunctionCallContent call) =>
call.Name is "web_search";
/// <inheritdoc/>
public override string? FormatDetail(FunctionCallContent call)
{
string? value = GetStringArgumentValue(call, "query");
return value is not null ? $"({value})" : null;
}
}
dotnet/samples/02-agents/Harness/Harness_Step01_Research/DownloadUriToolFormatter.cs
+23
View File
@@ -0,0 +1,23 @@
// Copyright (c) Microsoft. All rights reserved.
using Harness.Shared.Console.ToolFormatters;
using Microsoft.Extensions.AI;
namespace SampleApp;
/// <summary>
/// Formats <c>DownloadUri</c> tool calls, showing the target URI.
/// </summary>
public sealed class DownloadUriToolFormatter : ToolCallFormatter
{
/// <inheritdoc/>
public override bool CanFormat(FunctionCallContent call) =>
call.Name is "DownloadUri";
/// <inheritdoc/>
public override string? FormatDetail(FunctionCallContent call)
{
string? value = GetStringArgumentValue(call, "uri");
return value is not null ? $"({value})" : null;
}
}
dotnet/samples/02-agents/Harness/Harness_Step01_Research/Program.cs
+11 -7
View File
@@ -8,7 +8,8 @@
//
// Special commands:
// /todos — Display the current todo list without invoking the agent.
// exit — End the session.
// /mode — Get or set the current agent mode.
// /exit — End the session.
#pragma warning disable OPENAI001 // Suppress experimental API warnings for Responses API usage.
#pragma warning disable MAAI001 // Suppress experimental API warnings for Agents AI experiments.
@@ -16,6 +17,7 @@
using System.ClientModel.Primitives;
using Azure.Identity;
using Harness.Shared.Console;
using Harness.Shared.Console.ToolFormatters;
using Microsoft.Agents.AI;
using Microsoft.Extensions.AI;
using OpenAI;
@@ -158,13 +160,15 @@ AIAgent agent =
// Run the interactive console session using the shared HarnessConsole helper.
await HarnessConsole.RunAgentAsync(
agent,
title: "Research Assistant",
userPrompt: "Enter a research topic to get started.",
new HarnessConsoleOptions
{
MaxContextWindowTokens = MaxContextWindowTokens,
MaxOutputTokens = MaxOutputTokens,
EnablePlanningUx = true,
PlanningModeName = "plan",
ExecutionModeName = "execute"
Observers = HarnessConsoleOptions.BuildObserversWithPlanning(
agent,
planModeName: "plan",
executionModeName: "execute",
maxContextWindowTokens: MaxContextWindowTokens,
maxOutputTokens: MaxOutputTokens,
toolFormatters: [new DownloadUriToolFormatter(), .. ToolCallFormatter.BuildDefaultToolFormatters()]),
CommandHandlers = HarnessConsoleOptions.BuildDefaultCommandHandlers(agent),
});
dotnet/samples/02-agents/Harness/Harness_Step02_Research_WithSubAgents/Program.cs
+1 -2
View File
@@ -6,7 +6,7 @@
// equipped with Foundry's hosted web search tool.
//
// Special commands:
// exit — End the session.
// /exit — End the session.
#pragma warning disable OPENAI001 // Suppress experimental API warnings for Responses API usage.
#pragma warning disable MAAI001 // Suppress experimental API warnings for Agents AI experiments.
@@ -103,5 +103,4 @@ AIAgent parentAgent =
// Run the interactive console session.
await HarnessConsole.RunAgentAsync(
parentAgent,
title: "Stock Price Researcher (SubAgents Demo)",
userPrompt: "Enter a list of stock tickers (e.g., BAC, MSFT, BA):");
dotnet/samples/02-agents/Harness/Harness_Step03_DataProcessing/Program.cs
+1 -2
View File
@@ -8,7 +8,7 @@
// Ask the agent to analyze the data, produce summaries, or create new output files.
//
// Special commands:
// exit — End the session.
// /exit — End the session.
#pragma warning disable OPENAI001 // Suppress experimental API warnings for Responses API usage.
#pragma warning disable MAAI001 // Suppress experimental API warnings for Agents AI experiments.
@@ -85,5 +85,4 @@ AIAgent agent =
// Run the interactive console session.
await HarnessConsole.RunAgentAsync(
agent,
title: "Data Processing Assistant",
userPrompt: "Ask me to analyze the data files, produce summaries, or create output files.");
dotnet/src/Microsoft.Agents.AI.Harness/HarnessAgent.cs
+2
View File
@@ -17,6 +17,7 @@ namespace Microsoft.Agents.AI;
/// <see cref="HarnessAgent"/> assembles the following pipeline from a caller-supplied <see cref="IChatClient"/>:
/// <list type="number">
/// <item><description><see cref="FunctionInvokingChatClient"/> — automatic function/tool invocation.</description></item>
/// <item><description><see cref="MessageInjectingChatClient"/> — allows external code to inject messages into the conversation mid-stream.</description></item>
/// <item><description><see cref="PerServiceCallChatHistoryPersistingChatClient"/> — persists chat history after every individual service call within a function-invocation loop.</description></item>
/// <item><description><see cref="AIContextProviderChatClient"/> with a <see cref="CompactionProvider"/> — applies context-window compaction before each call so long function-invocation loops do not overflow the context window.</description></item>
/// </list>
@@ -110,6 +111,7 @@ public sealed class HarnessAgent : DelegatingAIAgent
return chatClient
.AsBuilder()
.UseFunctionInvocation()
.UseMessageInjection()
.UsePerServiceCallChatHistoryPersistence()
.UseAIContextProviders(compactionProvider)
.BuildAIAgent(new ChatClientAgentOptions