Extension SDK

XamlVisualEditor extensions are native .NET packages. A package contains xve.extension.json at the package root and an assembly implementing IXveExtension.

Minimal entry point

using XamlVisualEditor.Extensions;

public sealed class MyExtension : IXveExtension
{
    public Task ActivateAsync(ExtensionContext context, CancellationToken ct)
    {
        context.Subscriptions.Add(context.Commands.Register(
            "sample.sayHello",
            _ => context.Window.ShowInformationMessageAsync("Hello", ct)));

        return Task.CompletedTask;
    }
}

Common contribution surfaces

Commands and command metadata.
Menus, toolbars, command palette, and status bar items.
Tree, custom, and webview-style views.
Language servers and intellisense providers.
Debugger registrations.
Property editors.
Settings, storage, logging, dialogs, and permissions.

Samples

Sample packages live under tools/ExtensionSamples:

dotnet pack tools/ExtensionSamples/HelloExtension/HelloExtension.csproj -c Release
dotnet pack tools/ExtensionSamples/LspExtension/LspExtension.csproj -c Release

For deeper details, see the internal extension docs:

docs/EXTENSIONS.md
docs/EXTENSION-API.md
docs/VSCODE-MIGRATION.md