.NET · For developers

Roll Playwright .NET to a new version

microsoft/playwright-dotnet

Migrate a .NET 8 project to .NET 9 and resolve all breaking changes.

dotnet/skills

Analyze Azure DevOps CI build failures in dd-trace-dotnet pipeline.

DataDog/dd-trace-dotnet

Scaffold a new domain entity or aggregate in this Vertical Slice Architecture template — the entity itself, its strongly typed ID, errors, specification, EF Core configuration, DbSet, the mandatory…

SSWConsulting/SSW.VerticalSliceArchitecture

Help users batch multiple calls into a single UserOperation and sponsor gas with paymasters using Nethereum Account Abstraction.

Nethereum/Nethereum

Catalog of MSBuild anti-patterns with detection rules and fix recipes.

runceel/ReactiveProperty

A skill your agent uses when shipping a roslynator release, rolling CHANGELOG.md [Unreleased], updating the VS Code extension changelog, creating a GitHub v release, or optionally tagging cli-v.

dotnet/roslynator

Write, fix, or review NeoServer functional tests that start from the network handler and run against the real server stack.

OpenCoreMMO/OpenCoreMMO

Comprehensive C and .NET development skill for TSP projects.

querylenshq/ef-querylens

Guides making .NET libraries trimming-safe and Native-AOT compatible: the MSBuild properties, trimming attributes, warning codes and a playbook of safe patterns.

Aaronontheweb/dotnet-skills

Build, launch, screenshot, and drive the WinPrint.Maui Windows app (winprint.exe) — including UIA automation of the File button and native Open dialog, and pixel capture that works for WinUI3 content.

tig/winprint

Identify a .NET project's test platform, framework, command mode, and SDK-style vs classic project system.

microsoft/testfx

Verify whether an exact T-SQL script is already supported by SqlScriptDOM, then add or update the correct parser tests and baselines.

microsoft/SqlScriptDOM

Decompile NES ROM files (.nes) into C projects that can be rebuilt with dotnes.

jonathanpeppers/dotnes

Adds or extends a ScottPlot Cookbook recipe for a given plottable, in the right PlotTypes category and in the style of neighboring recipes.

ScottPlot/ScottPlot

Creates and maintains the per-distro JSON files that list the native packages .NET needs on each Linux distribution, scoped to one .NET version.

dotnet/core

Architecture-aware feature scaffolding for .NET 10 projects.

codewithmukesh/dotnet-claude-kit

Client Credentials Flow for service-to-service (daemon) authentication in MSAL.NET without user involvement

AzureAD/microsoft-authentication-library-for-dotnet

Manages .NET Docker images including adding images for new .NET versions, new Linux distros (Alpine, Ubuntu, Azure Linux), and new Windows versions.

dotnet/dotnet-docker

Investigate and fix flaky/random CI test failures in dotnet/macios.

dotnet/macios

Manage stacked branches and pull requests with the gh-stack GitHub CLI extension.

dotnet/macios

A skill your agent uses when opening a pull request for the current branch, or when an existing pull request needs a better description - including when the check-description CI check has failed.

Gremlinq/ExRam.Gremlinq

Drive the AuthEndpoints HTTP API via the in-repo test host (cookie sessions, Identity bearer, Simple JWT, CSRF, ReAuth).

madeyoga/AuthEndpoints

C 12 / .NET 8 and PowerShell cmdlet design rules for this repository - naming, output and error channels, parameter validation, ShouldProcess, async, culture, cross-platform and ALC constraints.

pnp/powershell

Migrate a .NET 9 project or solution to .NET 10 and resolve all breaking changes.

dotnet/skills

Build, extend, and debug AI agents in Egroo using the Microsoft Agent Framework (C .NET).

jihadkhawaja/Egroo

Specialized in reverse-engineering compiled binaries (JARs, DLLs).

HacktronAI/skills

End-to-end workflow for building, deploying, inspecting, and debugging .NET MAUI and MAUI Blazor Hybrid apps as an AI agent.

Redth/Maui.Gtk

Sokol.NET framework development — use for ANY work in this repo: creating or debugging examples, building/running for desktop/Android/iOS/Web, writing or compiling shaders, adding a new C/C++…

elix22/Sokol.NET

Help users run an ERC-4337 bundler using Nethereum — set up in-process or standalone bundlers with mempool, validation, reputation, and JSON-RPC server.

Nethereum/Nethereum

Enforces a strict test-driven development (TDD) workflow for the HTML Minifier repo.

deanhume/html-minifier

Parse and diagnose New Relic .NET agent logs (newrelicagent.log) and profiler logs (NewRelic.Profiler.<pid.log) from a support ticket.

newrelic/newrelic-dotnet-agent

Adds dotnet/maui-specific context for investigating failing PR checks and broken nightly builds: pipelines, Helix logs, binlogs and merge-readiness verdicts.

dotnet/maui

Architecture selection advisor for .NET applications. An agent skill from codewithmukesh/dotnet-claude-kit.

codewithmukesh/dotnet-claude-kit

Build, test, and validate changes in the vstest repository. An agent skill from microsoft/vstest.

microsoft/vstest

Debugs Windows and Linux/macOS applications (native, .NET/CLR, mixed-mode) with WinDbg MCP (crash dumps, !analyze, !syncblk, !dlk, !runaway, !dumpheap, !gcroot, BSOD), dotnet-dump, lldb with SOS…

novotnyllc/dotnet-artisan

Activate when BenchmarkDotNet is involved or when a .NET performance question requires controlled microbenchmark measurement.

rodri-oliveira-dev/Dapper-FluentMap

Create a pull request for OpenCoreMMO following the project's PR template.

OpenCoreMMO/OpenCoreMMO

This skill documents how to use the fmodel-mcp toolkit (a CUE4Parse-based .NET CLI plus a thin Python MCP server) to inspect and export Unreal Engine game assets — pak files, textures, meshes…

pa001024/dna-builder

A skill your agent uses when configuring Git hooks in .NET projects before team commits occur, to enforce commit message standards and code formatting automatically

SebastienDegodez/copilot-instructions

ALWAYS USE when asked to fix, rewrite, update, improve, modernize, show corrected code for, or explain existing MSTest tests or MSTest-specific configuration.

microsoft/testfx

Dev/test workflow for tracer engineers working on the Datadog .NET tracer — build a local Datadog.AzureFunctions NuGet package, deploy it to a test Azure Function App, trigger it, and analyze…

DataDog/dd-trace-dotnet

Provides malware analysis and network traffic techniques for CTF challenges.

ljagiello/ctf-skills

A skill your agent uses when the user is working with an Aspire distributed application and needs to operate the AppHost or its resources through the Aspire CLI: start, restart, stop, or wait on the…

SSWConsulting/SSW.VerticalSliceArchitecture

Author and extend the Roslyn tooling bundled in the Nice3point.Revit.Toolkit package: the incremental source generator that emits external-event boilerplate, the analyzers and code fixers that…

Nice3point/RevitToolkit

Fix broken dependency update PRs and aggregate the ones that work into one PR.

microsoft/vs-validation

Regenerates the HAL+JSON .NET release information graph from source data when new releases, CVE data or lifecycle dates change.

dotnet/core

On-Behalf-Of (OBO) Flow for web APIs to call downstream APIs while preserving user identity in MSAL.NET

AzureAD/microsoft-authentication-library-for-dotnet