Borrowing it
Nothing to install: this file belongs to managedcode/dotPilot. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/managedcode/dotPilot/main/.codex/skills/mcaf-dotnet/SKILL.mdgit clone --depth 1 https://github.com/managedcode/dotPilotWrote 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/managedcode/dotpilot/mcaf-dotnet)<a href="https://agentmods.dev/skills/managedcode/dotpilot/mcaf-dotnet"><img src="https://agentmods.dev/badge/skills/managedcode/dotpilot/mcaf-dotnet/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/managedcode/dotpilot/mcaf-dotnet"><img src="https://agentmods.dev/badge/skills/managedcode/dotpilot/mcaf-dotnet.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00087 | $0.01560 |
| Opus 5.5 | $0.00035 | $0.00624 |
| Sonnet 5.5 | $0.00017 | $0.00312 |
| Haiku 4.5 | $0.00009 | $0.00156 |
Grade A, and why
mcaf-dotnet 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- mcaf-dotnet — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MCAF: .NET
Trigger On
- writing, reviewing, debugging, or refactoring C# or .NET code
- deciding which .NET skill should be used for a task
- modernizing a .NET codebase while keeping language and runtime compatibility
- verifying .NET changes with analyzers, formatting, tests, and coverage
Value
- produce a concrete project delta: code, docs, config, tests, CI, or review artifact
- reduce ambiguity through explicit planning, verification, and final validation skills
- leave reusable project context so future tasks are faster and safer
Do Not Use For
- non-.NET repositories
- a single-tool task where one exact .NET tool skill already covers the whole request
Inputs
- the nearest
AGENTS.md - solution and project files
Directory.Build.*files- the repo-root
.editorconfigand any nested.editorconfigfiles that apply - target
TFM,LangVersion, SDK version, test packages, and analyzer packages
Quick Start
- Read the nearest
AGENTS.mdand confirm scope and constraints. - Run this skill's
Workflowthrough theRalph Loopuntil outcomes are acceptable. - Return the
Required Result Formatwith concrete artifacts and verification evidence.
Workflow
- Detect the real stack before changing code or commands:
TFMorTFMs- explicit
LangVersionor the default implied by the SDK and target framework - test framework: xUnit, TUnit, or MSTest
- runner model:
VSTestorMicrosoft.Testing.Platform - installed analyzers, formatters, coverage tools, and architecture-test libraries
- Route framework mechanics through exactly one matching test skill:
mcaf-dotnet-xunitmcaf-dotnet-tunitmcaf-dotnet-mstest
- Route quality and policy through the matching skill:
mcaf-dotnet-quality-cimcaf-dotnet-analyzer-configmcaf-dotnet-complexity- tool-specific skills such as
mcaf-dotnet-format,mcaf-dotnet-roslynator,mcaf-dotnet-stylecop-analyzers,mcaf-dotnet-meziantou-analyzer,mcaf-dotnet-coverlet,mcaf-dotnet-reportgenerator,mcaf-dotnet-resharper-clt,mcaf-dotnet-netarchtest,mcaf-dotnet-archunitnet,mcaf-dotnet-codeql,mcaf-dotnet-csharpier, andmcaf-dotnet-stryker
- Route design and structure through:
mcaf-solid-maintainabilityfor SOLID, SRP, cohesion, and maintainability limitsmcaf-architecture-overviewwhen system or module boundaries, contracts, or architecture docs need workmcaf-dotnet-featureswhen modern C# feature selection or language-version compatibility matters
- Write or review code using the newest stable C# features the repo actually supports.
- After any .NET code change, run the repo-defined post-change quality pass from narrow to broad:
formatbuildanalyze- focused
test - broader
test coverageand report generation when configured- extra configured gates such as Roslynator, StyleCop, Meziantou, ReSharper CLT, NetArchTest, ArchUnitNET, CodeQL, CSharpier, or Stryker
- If the repo does not define these commands clearly, tighten
AGENTS.mdbefore continuing so later agents stop guessing. - Do not introduce preview language features unless the repo explicitly opts into preview in project or MSBuild settings.
What ships with it
2 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.
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 · 136 lines · 87 tokens per session scan A 28d253a1204f
mcaf-dotnet is a skill published in the GitHub repository managedcode/dotPilot (25 stars, last pushed 6mo ago), licensed MIT. It adds 87 tokens to every session and 1,560 once invoked, about $0.0003 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.
Other skills, from other repositories
rider-search
Routing rules for code search in JetBrains Rider projects — use the Rider MCP symbol/reference/file tools instead of Bash grep. Use whenever searching for a symbol, definition, function, variable, type, or finding usages/references in a C#/.NET or Unreal C++ codebase open in Rider.
build-and-test
How to build and test .NET projects in the Agent Framework repository. Use this when verifying or testing changes.
verify-dotnet-samples
How to build, run and verify the .NET sample projects in the Agent Framework repository. Use this when a user wants to verify that the samples still function as expected.
generate-code-cs
Generate the code from typespec for C#. Parameter: C# SDK repository root location .
author-test
Generate a test given sample. Parameters: C# SDK repository root; Package name: one of Azure.AI.Projects, Azure.AI.Projects.Agents or Azure.AI.Extensions.OpenAI; the sample to use as a starting point for the test.
migrate-xunit-to-xunit-v3
Migrate .NET test projects from xUnit.net v2 to xunit.v3 and fix v3 breaks. Use for package/CPM conversion, OutputType=Exe, preserving the VSTest or MTP runner (including projects currently using YTest.MTP.XUnit2), incompatible TFMs, async void tests, string-to-Type attributes, custom Fact/Theory/BeforeAfterTest…