M365 Agents Dotnet

Microsoft 365 Agents SDK (.NET)

Overview

This public intake copy packages plugins/antigravity-awesome-skills-claude/skills/m365-agents-dotnet from https://github.com/sickn33/antigravity-awesome-skills into the native Omni Skills editorial shape without hiding its origin.

Use it when the operator needs the upstream workflow, support files, and repository context to stay intact while the public validator and private enhancer continue their normal downstream flow.

This intake keeps the copied upstream files intact and uses the external_source block in metadata.json plus ORIGIN.md as the provenance anchor for review.

Microsoft 365 Agents SDK (.NET)

Imported source sections that did not map cleanly to the public headings are still preserved below or in the support files. Notable imported sections: Before implementation, Configuration (appsettings.json), AgentApplication routing, Copilot Studio direct-to-engine client, Limitations.

When to Use This Skill

Use this section as the trigger filter. It should make the activation boundary explicit before the operator loads files, runs commands, or opens a pull request.

• This skill is applicable to execute the workflow or actions described in the overview.
• Use when the request clearly matches the imported source intent: Microsoft 365 Agents SDK for .NET. Build multichannel agents for Teams/M365/Copilot Studio with ASP.NET Core hosting, AgentApplication routing, and MSAL-based auth.
• Use when the operator should preserve upstream workflow detail instead of rewriting the process from scratch.
• Use when provenance needs to stay visible in the answer, PR, or review packet.
• Use when copied upstream references, examples, or scripts materially improve the answer.
• Use when the workflow should remain reviewable in the public intake repo before the private enhancer takes over.

Operating Table

Workflow

This workflow is intentionally editorial and operational at the same time. It keeps the imported source useful to the operator while still satisfying the public intake standards that feed the downstream enhancer flow.

1. bash dotnet add package Microsoft.Agents.Hosting.AspNetCore dotnet add package Microsoft.Agents.Authentication.Msal dotnet add package Microsoft.Agents.Storage dotnet add package Microsoft.Agents.CopilotStudio.Client dotnet add package Microsoft.Identity.Client.Extensions.Msal csharp using Microsoft.Agents.Builder; using Microsoft.Agents.Hosting.AspNetCore; using Microsoft.Agents.Storage; using Microsoft.AspNetCore.Builder; using Microsoft.AspNetCore.Http; using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Hosting; var builder = WebApplication.CreateBuilder(args); builder.Services.AddHttpClient(); builder.AddAgentApplicationOptions(); builder.AddAgent(); builder.Services.AddSingleton<IStorage, MemoryStorage>(); builder.Services.AddControllers(); builder.Services.AddAgentAspNetAuthentication(builder.Configuration); WebApplication app = builder.Build(); app.UseAuthentication(); app.UseAuthorization(); app.MapGet("/", () => "Microsoft Agents SDK Sample"); var incomingRoute = app.MapPost("/api/messages", async (HttpRequest request, HttpResponse response, IAgentHttpAdapter adapter, IAgent agent, CancellationToken ct) => { await adapter.ProcessAsync(request, response, agent, ct); }); if (!app.Environment.IsDevelopment()) { incomingRoute.RequireAuthorization(); } else { app.Urls.Add("http://localhost:3978"); } app.Run();
2. Confirm the user goal, the scope of the imported workflow, and whether this skill is still the right router for the task.
3. Read the overview and provenance files before loading any copied upstream support files.
4. Load only the references, examples, prompts, or scripts that materially change the outcome for the current request.
5. Execute the upstream workflow while keeping provenance and source boundaries explicit in the working notes.
6. Validate the result against the upstream expectations and the evidence you can point to in the copied files.
7. Escalate or hand off to a related skill when the work moves out of this imported workflow's center of gravity.

Imported Workflow Notes

Imported: Installation

dotnet add package Microsoft.Agents.Hosting.AspNetCore
dotnet add package Microsoft.Agents.Authentication.Msal
dotnet add package Microsoft.Agents.Storage
dotnet add package Microsoft.Agents.CopilotStudio.Client
dotnet add package Microsoft.Identity.Client.Extensions.Msal

Imported: Core Workflow: ASP.NET Core agent host

using Microsoft.Agents.Builder;
using Microsoft.Agents.Hosting.AspNetCore;
using Microsoft.Agents.Storage;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddHttpClient();
builder.AddAgentApplicationOptions();
builder.AddAgent<MyAgent>();
builder.Services.AddSingleton<IStorage, MemoryStorage>();

builder.Services.AddControllers();
builder.Services.AddAgentAspNetAuthentication(builder.Configuration);

WebApplication app = builder.Build();

app.UseAuthentication();
app.UseAuthorization();

app.MapGet("/", () => "Microsoft Agents SDK Sample");

var incomingRoute = app.MapPost("/api/messages",
    async (HttpRequest request, HttpResponse response, IAgentHttpAdapter adapter, IAgent agent, CancellationToken ct) =>
    {
        await adapter.ProcessAsync(request, response, agent, ct);
    });

if (!app.Environment.IsDevelopment())
{
    incomingRoute.RequireAuthorization();
}
else
{
    app.Urls.Add("http://localhost:3978");
}

app.Run();

Imported: Overview

Build enterprise agents for Microsoft 365, Teams, and Copilot Studio using the Microsoft.Agents SDK with ASP.NET Core hosting, agent routing, and MSAL-based authentication.

Imported: Before implementation

• Use the microsoft-docs MCP to verify the latest APIs for AddAgent, AgentApplication, and authentication options.
• Confirm package versions in NuGet for the Microsoft.Agents.* packages you plan to use.

Examples

Example 1: Ask for the upstream workflow directly

Use @m365-agents-dotnet to handle <task>. Start from the copied upstream workflow, load only the files that change the outcome, and keep provenance visible in the answer.

Explanation: This is the safest starting point when the operator needs the imported workflow, but not the entire repository.

Example 2: Ask for a provenance-grounded review

Review @m365-agents-dotnet against metadata.json and ORIGIN.md, then explain which copied upstream files you would load first and why.

Explanation: Use this before review or troubleshooting when you need a precise, auditable explanation of origin and file selection.

Example 3: Narrow the copied support files before execution

Use @m365-agents-dotnet for <task>. Load only the copied references, examples, or scripts that change the outcome, and name the files explicitly before proceeding.

Explanation: This keeps the skill aligned with progressive disclosure instead of loading the whole copied package by default.

Example 4: Build a reviewer packet

Review @m365-agents-dotnet using the copied upstream files plus provenance, then summarize any gaps before merge.

Explanation: This is useful when the PR is waiting for human review and you want a repeatable audit packet.

Best Practices

Treat the generated public skill as a reviewable packaging layer around the upstream repository. The goal is to keep provenance explicit and load only the copied source material that materially improves execution.

• Use AgentApplication subclasses to centralize routing and error handling.
• Use MemoryStorage only for development; use persisted storage in production.
• Enable TokenValidation in production and require authorization on /api/messages.
• Keep auth secrets in configuration providers (Key Vault, managed identity, env vars).
• Reuse HttpClient from IHttpClientFactory and cache MSAL tokens.
• Prefer async handlers and pass CancellationToken to SDK calls.
• Keep the imported skill grounded in the upstream repository; do not invent steps that the source material cannot support.

Imported Operating Notes

Imported: Best Practices

1. Use AgentApplication subclasses to centralize routing and error handling.
2. Use MemoryStorage only for development; use persisted storage in production.
3. Enable TokenValidation in production and require authorization on /api/messages.
4. Keep auth secrets in configuration providers (Key Vault, managed identity, env vars).
5. Reuse HttpClient from IHttpClientFactory and cache MSAL tokens.
6. Prefer async handlers and pass CancellationToken to SDK calls.

Troubleshooting

Problem: The operator skipped the imported context and answered too generically

Symptoms: The result ignores the upstream workflow in plugins/antigravity-awesome-skills-claude/skills/m365-agents-dotnet, fails to mention provenance, or does not use any copied source files at all. Solution: Re-open metadata.json, ORIGIN.md, and the most relevant copied upstream files. Check the external_source block first, then restate the provenance before continuing.

Problem: The imported workflow feels incomplete during review

Symptoms: Reviewers can see the generated SKILL.md, but they cannot quickly tell which references, examples, or scripts matter for the current task. Solution: Point at the exact copied references, examples, scripts, or assets that justify the path you took. If the gap is still real, record it in the PR instead of hiding it.

Problem: The task drifted into a different specialization

Symptoms: The imported skill starts in the right place, but the work turns into debugging, architecture, design, security, or release orchestration that a native skill handles better. Solution: Use the related skills section to hand off deliberately. Keep the imported provenance visible so the next skill inherits the right context instead of starting blind.

Related Skills

• @00-andruia-consultant - Use when the work is better handled by that native specialization after this imported skill establishes context.
• @00-andruia-consultant-v2 - Use when the work is better handled by that native specialization after this imported skill establishes context.
• @10-andruia-skill-smith - Use when the work is better handled by that native specialization after this imported skill establishes context.
• @10-andruia-skill-smith-v2 - Use when the work is better handled by that native specialization after this imported skill establishes context.

Additional Resources

Use this support matrix and the linked files below as the operator packet for this imported skill. They should reflect real copied source material, not generic scaffolding.

Imported Reference Notes

Imported: Reference Files

Imported: Reference Links

Imported: Configuration (appsettings.json)

{
  "TokenValidation": {
    "Enabled": true,
    "Audiences": [
      "{{ClientId}}"
    ],
    "TenantId": "{{TenantId}}"
  },
  "AgentApplication": {
    "StartTypingTimer": false,
    "RemoveRecipientMention": false,
    "NormalizeMentions": false
  },
  "Connections": {
    "ServiceConnection": {
      "Settings": {
        "AuthType": "ClientSecret",
        "ClientId": "{{ClientId}}",
        "ClientSecret": "{{ClientSecret}}",
        "AuthorityEndpoint": "https://login.microsoftonline.com/{{TenantId}}",
        "Scopes": [
          "https://api.botframework.com/.default"
        ]
      }
    }
  },
  "ConnectionsMap": [
    {
      "ServiceUrl": "*",
      "Connection": "ServiceConnection"
    }
  ],
  "CopilotStudioClientSettings": {
    "DirectConnectUrl": "",
    "EnvironmentId": "",
    "SchemaName": "",
    "TenantId": "",
    "AppClientId": "",
    "AppClientSecret": ""
  }
}

Imported: AgentApplication routing

using Microsoft.Agents.Builder;
using Microsoft.Agents.Builder.App;
using Microsoft.Agents.Builder.State;
using Microsoft.Agents.Core.Models;
using System;
using System.Threading;
using System.Threading.Tasks;

public sealed class MyAgent : AgentApplication
{
    public MyAgent(AgentApplicationOptions options) : base(options)
    {
        OnConversationUpdate(ConversationUpdateEvents.MembersAdded, WelcomeAsync);
        OnActivity(ActivityTypes.Message, OnMessageAsync, rank: RouteRank.Last);
        OnTurnError(OnTurnErrorAsync);
    }

    private static async Task WelcomeAsync(ITurnContext turnContext, ITurnState turnState, CancellationToken ct)
    {
        foreach (ChannelAccount member in turnContext.Activity.MembersAdded)
        {
            if (member.Id != turnContext.Activity.Recipient.Id)
            {
                await turnContext.SendActivityAsync(
                    MessageFactory.Text("Welcome to the agent."),
                    ct);
            }
        }
    }

    private static async Task OnMessageAsync(ITurnContext turnContext, ITurnState turnState, CancellationToken ct)
    {
        await turnContext.SendActivityAsync(
            MessageFactory.Text($"You said: {turnContext.Activity.Text}"),
            ct);
    }

    private static async Task OnTurnErrorAsync(
        ITurnContext turnContext,
        ITurnState turnState,
        Exception exception,
        CancellationToken ct)
    {
        await turnState.Conversation.DeleteStateAsync(turnContext, ct);

        var endOfConversation = Activity.CreateEndOfConversationActivity();
        endOfConversation.Code = EndOfConversationCodes.Error;
        endOfConversation.Text = exception.Message;
        await turnContext.SendActivityAsync(endOfConversation, ct);
    }
}

Imported: Copilot Studio direct-to-engine client

DelegatingHandler for token acquisition (interactive flow)

using System.Net.Http.Headers;
using Microsoft.Agents.CopilotStudio.Client;
using Microsoft.Identity.Client;

internal sealed class AddTokenHandler : DelegatingHandler
{
    private readonly SampleConnectionSettings _settings;

    public AddTokenHandler(SampleConnectionSettings settings) : base(new HttpClientHandler())
    {
        _settings = settings;
    }

    protected override async Task<HttpResponseMessage> SendAsync(
        HttpRequestMessage request,
        CancellationToken cancellationToken)
    {
        if (request.Headers.Authorization is null)
        {
            string[] scopes = [CopilotClient.ScopeFromSettings(_settings)];

            IPublicClientApplication app = PublicClientApplicationBuilder
                .Create(_settings.AppClientId)
                .WithAuthority(AadAuthorityAudience.AzureAdMyOrg)
                .WithTenantId(_settings.TenantId)
                .WithRedirectUri("http://localhost")
                .Build();

            AuthenticationResult authResponse;
            try
            {
                var account = (await app.GetAccountsAsync()).FirstOrDefault();
                authResponse = await app.AcquireTokenSilent(scopes, account).ExecuteAsync(cancellationToken);
            }
            catch (MsalUiRequiredException)
            {
                authResponse = await app.AcquireTokenInteractive(scopes).ExecuteAsync(cancellationToken);
            }

            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", authResponse.AccessToken);
        }

        return await base.SendAsync(request, cancellationToken);
    }
}

Console host with CopilotClient

using Microsoft.Agents.CopilotStudio.Client;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

HostApplicationBuilder builder = Host.CreateApplicationBuilder(args);

var settings = new SampleConnectionSettings(
    builder.Configuration.GetSection("CopilotStudioClientSettings"));

builder.Services.AddHttpClient("mcs").ConfigurePrimaryHttpMessageHandler(() =>
{
    return new AddTokenHandler(settings);
});

builder.Services
    .AddSingleton(settings)
    .AddTransient<CopilotClient>(sp =>
    {
        var logger = sp.GetRequiredService<ILoggerFactory>().CreateLogger<CopilotClient>();
        return new CopilotClient(settings, sp.GetRequiredService<IHttpClientFactory>(), logger, "mcs");
    });

IHost host = builder.Build();
var client = host.Services.GetRequiredService<CopilotClient>();

await foreach (var activity in client.StartConversationAsync(emitStartConversationEvent: true))
{
    Console.WriteLine(activity.Type);
}

await foreach (var activity in client.AskQuestionAsync("Hello!", null))
{
    Console.WriteLine(activity.Type);
}

Imported: Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.