Kernel Builder Integration

The UseCopilotChatCompletion() extension method is the primary way to integrate the Copilot connector with Semantic Kernel.

Note

Kernel builder extensions require net8.0 or later. On netstandard2.0, use the CopilotHttpClientFactory directly.

Basic usage

var kernel = Kernel.CreateBuilder()
    .UseCopilotChatCompletion()
    .Build();

With model selection

var kernel = Kernel.CreateBuilder()
    .UseCopilotChatCompletion(CopilotModels.ClaudeSonnet4)
    .Build();

With custom options

var kernel = Kernel.CreateBuilder()
    .UseCopilotChatCompletion(
        modelId: CopilotModels.ClaudeSonnet46,
        configure: options =>
        {
            options.EditorVersion = "vscode/1.104.1";
            options.DangerouslyDisableSslValidation = true;
        })
    .Build();

Service Collection integration

For DI-heavy applications:

services.AddCopilotSessionProvider(options =>
{
    options.DefaultModel = CopilotModels.ClaudeSonnet4;
});

This registers CopilotSessionProvider as a singleton in the container.

How it works

Under the hood, UseCopilotChatCompletion():

1. Creates a CopilotSessionProvider with the specified options
2. Creates an HttpClient via CopilotHttpClientFactory.Create() with the auth handler
3. Registers SK's built-in AddOpenAIChatCompletion() with the custom HttpClient
4. Sets the BaseAddress to the Copilot API endpoint

Since the Copilot API is OpenAI-compatible, no custom IChatCompletionService is needed.