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Microsoft 365 Agents SDK (.NET) | DecimalAI

agent toolingby microsoft

Microsoft 365 Agents SDK (.NET)

microsoft/m365-agents-dotnet

Source microsoft/skills ↗License MIT

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. Triggers: "Microsoft 365 Agents SDK", "Microsoft.Agents", "AddAgentApplicationOptions", "AgentApplication", "AddAgentAspNetAuthentication", "Copilot Studio client", "IAgentHttpAdapter".

SkillScore91Maintained

Automatic

AI Engineer pack

Last verified 8/10/2026

What it changes

Passed 21 of 23 test cases with the skill, and 9 of 23 without it.

Without skill39%

With skill91%

Checks it passed that the model alone missed

The code calls client.AskQuestionAsync.
The code calls CopilotClient.ScopeFromSettings.
The code calls builder.AddAgentApplicationOptions().

and 18 more in the full report

13 fixed8 passed either way1 still failing1 broke

Pass-rate lift: +52 pp
Tokens: +55%
Agent turns: 0%
Response time: -52%

Model gemini-3.6-flashMeasured 8/10/2026v121 of 23 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/microsoft-m365-agents-dotnet/SKILL.md https://app.decimal.ai/s/microsoft-m365-agents-dotnet/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add microsoft-m365-agents-dotnet, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/microsoft-m365-agents-dotnet/ and pins it in .decimal/skills.lock

decimalai skills add microsoft-m365-agents-dotnet

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/microsoft-m365-agents-dotnet/SKILL.md https://app.decimal.ai/s/microsoft-m365-agents-dotnet/SKILL.md

Raw file: /s/microsoft-m365-agents-dotnet/SKILL.md ↗ · machine-readable summary at /s/microsoft-m365-agents-dotnet.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 13 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 13

Prompt

When setting up WebApplicationBuilder in ASP.NET Core for the Microsoft.Agents SDK, what builder extension method must be called to register the application options before calling AddAgent?

What was checked, without and with the skill
Checked	Without skill	With skill
The code calls builder.AddAgentApplicationOptions().	Missed	Passed

case-06 · gemini-3.6-flash · 8/10/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md275 linessingle file

Microsoft 365 Agents SDK (.NET)

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.

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.

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

Configuration (appsettings.json)

{
  "TokenValidation": {
    "Enabled": true,
    "Audiences": ["{{ClientId}}"],
    "TenantId": "{{TenantId}}"
  },
  "AgentApplication": {
    "StartTypingTimer": false,
    "RemoveRecipientMention": false,
    "NormalizeMentions": false
  },
  "Connections": {
    "ServiceConnection": {
      "Settings": {
        "AuthType": "ClientSecret",
        "ClientId": "{{ClientId}}",

Track record

Benchmark

21 / 23

test cases passed, vs 9 / 23 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

microsoft / skills

.github/plugins/azure-sdk-dotnet/skills/m365-agents-dotnet/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Microsoft 365 Agents SDK (.NET)

Overview

Before implementation

Installation

Configuration (appsettings.json)

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills