make-wpf-chat-bubble-template

WPF Chat Bubble Template Generator

If $0 is empty, use the AskUserQuestion tool to ask: "Enter the chat turn ViewModel name (e.g., ChatTurnViewModel, MessageViewModel)". Do NOT proceed until a valid name is provided. Use the response as the turn ViewModel name for all subsequent steps.

Generate the role-differentiated chat bubble DataTemplate (opposite alignment, distinct background, asymmetric gutter, sized to content) and the $0 turn ViewModel that drives it, for an ItemsControl of chat turns.

• Replace {Namespace} with the project's root namespace.
• The bubble hosts a MarkdownPresenter (generate it with /wpf-dev-pack:make-wpf-markdown-presenter) so each turn renders selectable markdown.

The governing rule (full rationale in the styling-chat-bubbles-in-wpf knowledge topic — fetch via WpfDevPackMcp get_wpf_topic): declare the base (assistant) values as Style Setters and the per-role override as a DataTrigger Setter — NEVER set a trigger-controlled property (Background, HorizontalAlignment, Margin) as an inline attribute on the Border. In WPF dependency-property value precedence a local value (an inline attribute) outranks a Style trigger Setter, so an inline attribute silently defeats the role DataTrigger and both roles render identically.

Usage

/wpf-dev-pack:make-wpf-chat-bubble-template ChatTurnViewModel

Generated Code

$0.cs (turn ViewModel)

IsUser discriminates the role; Markdown is the content the streaming orchestrator appends to. Lives in the ViewModels project (no System.Windows).

Skip this file if /wpf-dev-pack:make-wpf-chatclient already emitted a turn ViewModel — emitting both produces a duplicate-type collision. The chatclient's version is this class plus an IsWaiting flag.

namespace {Namespace}.ViewModels;

public sealed partial class $0 : ObservableObject
{
    [ObservableProperty] private bool _isUser;
    [ObservableProperty] private bool _isWaiting;          // "waiting…" until the first streamed token
    [ObservableProperty] private string _markdown = string.Empty;

    // The streaming orchestrator appends tokens here; the bound MarkdownPresenter re-renders.
    public void AppendMarkdown(string delta) => Markdown += delta;
}