ApplicationInsights-dotnet is the .NET SDK for collecting application telemetry and sending it to Azure Monitor and Application Insights through OpenTelemetry. It is for ASP.NET Core applications, worker services, console programs, background services, and custom .NET integrations that need monitoring data. The catalogue includes an AI skill that guides coding agents through setting up, migrating, or improving Application Insights.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add microsoft/ApplicationInsights-dotnet --skill applicationinsights-setupgit clone --depth 1 https://github.com/microsoft/ApplicationInsights-dotnetWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/microsoft/applicationinsights-dotnet/applicationinsights-setup)<a href="https://agentmods.dev/skills/microsoft/applicationinsights-dotnet/applicationinsights-setup"><img src="https://agentmods.dev/badge/skills/microsoft/applicationinsights-dotnet/applicationinsights-setup/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/microsoft/applicationinsights-dotnet/applicationinsights-setup"><img src="https://agentmods.dev/badge/skills/microsoft/applicationinsights-dotnet/applicationinsights-setup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00103 | $0.03133 |
| Opus 5.5 | $0.00041 | $0.01253 |
| Sonnet 5.5 | $0.00021 | $0.00627 |
| Haiku 4.5 | $0.00010 | $0.00313 |
Grade A, and why
applicationinsights-setup scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Application Insights Setup
This skill detects your .NET application type and instrumentation state, then guides you through the correct setup, migration, or enhancement path.
Step 1 — Detect Application Type
Find all .csproj files (also .fsproj, .vbproj) in the workspace. If multiple non-library projects exist, ask the user which one to instrument before proceeding. Also check for global.json as a .NET workspace indicator.
First, check the <Project Sdk="..."> attribute in the .csproj:
SDK-style projects (modern format — has Sdk attribute)
| Signal | App Type |
|---|---|
Sdk="Microsoft.NET.Sdk.Web" |
ASP.NET Core |
Sdk="Microsoft.NET.Sdk.Worker" |
Worker Service |
Microsoft.Azure.Functions.Worker or Microsoft.NET.Sdk.Functions in PackageReference |
Azure Functions — not supported by this skill; refer to Azure Functions monitoring docs |
Sdk="Microsoft.NET.Sdk" with <OutputType>Exe</OutputType> |
Console App |
Sdk="Microsoft.NET.Sdk" with <OutputType>Library</OutputType> or no OutputType |
Library — does not get pipeline setup (no AddApplicationInsightsTelemetry() / UseAzureMonitor()), but may need migration if it uses TelemetryClient, ITelemetryInitializer, ITelemetryProcessor, or other 2.x APIs. Check for existing Application Insights package references and apply migration guidance if found. |
For ASP.NET Core / Worker Service, read Program.cs (or Startup.cs in older projects) to confirm hosting pattern:
WebApplication.CreateBuilder→ ASP.NET Core minimal APIsHost.CreateDefaultBuilderorHost.CreateApplicationBuilder→ Generic HostCreateWebHostBuilder/WebHost.CreateDefaultBuilder→ Legacy ASP.NET Core host
Legacy projects (no Sdk attribute — old .csproj format)
If the <Project> element has no Sdk attribute, this is a legacy .NET Framework project. Detect the type using file and reference patterns:
| Signal (ANY ONE is sufficient) | App Type |
|---|---|
Web.config with <system.web> section |
ASP.NET Classic |
System.Web in assembly references (<Reference Include="System.Web" />) |
ASP.NET Classic |
Microsoft.AspNet.* packages in packages.config |
ASP.NET Classic |
.svc files OR System.ServiceModel reference OR [ServiceContract] attributes |
WCF Service — not supported by this skill; manual onboarding required |
Microsoft.Owin or Owin in packages.config, or IAppBuilder/IOwinContext usage |
OWIN App — not supported by this skill; manual onboarding required |
<OutputType>Exe</OutputType> or <OutputType>WinExe</OutputType> with no web signals |
Console App |
What ships with it
25 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/aad-authentication-migration.md 3.3 KB
- references/analysis-template.md 6.4 KB
- references/aspnet-classic-greenfield.md 2.0 KB
- references/aspnetcore-greenfield.md 2.4 KB
- references/code-migration.md 7.9 KB
- references/console-setup.md 3.7 KB
- references/custom-activities.md 4.8 KB
- references/custom-logging.md 5.0 KB
- references/custom-metrics.md 2.9 KB
- references/custom-processors.md 3.9 KB
- references/dependency-tracking.md 1.3 KB
- references/entity-framework.md 2.3 KB
- references/http-instrumentation.md 4.0 KB
- references/ilogger-migration.md 1.2 KB
- references/initializer-migration.md 4.8 KB
- references/live-metrics-migration.md 934 B
- references/no-code-change-migration.md 2.0 KB
- references/opentelemetry-pipeline.md 7.1 KB
- references/otlp-exporter.md 2.3 KB
- references/processor-migration.md 4.7 KB
- references/redis-cache.md 2.3 KB
- references/sampling-migration.md 1.3 KB
- references/sql-client.md 2.5 KB
- references/telemetryclient-migration.md 2.9 KB
- references/workerservice-greenfield.md 4.0 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 173 lines · 103 tokens per session scan A 1b2de74c8ebe
applicationinsights-setup is a skill published in the GitHub repository microsoft/ApplicationInsights-dotnet (615 stars, last pushed 5d ago), licensed MIT. It adds 103 tokens to every session and 3,133 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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