705 mods tagged C# and .NET that install into Codex, measured the same four ways as everything else here: what each costs in tokens on every session, what a security scan found and why, whether it is the original, and what changed.
Skill Codex
A workflow for moving numerical algorithms from MATLAB, a technical computing environment, into a C or C++ DLL that C# programs can call on Windows. It also checks that the converted results match MATLAB’s results.
linux-ur/discord-net-components-v2
Skill Claude CodeCodex
Reference and implementation guide for building Discord bot UIs with Discord.Net's Message Components V2 system (ComponentBuilderV2) in C#. Covers every V2-only component (Container, Section, Text Display, Thumbnail, Media Gallery, File, Separator), the shared V1/V2 interactive components (Action Row, Button…
iamBrzDev/enterprise-agent-skills
Skill Claude CodeCodex
Implements enterprise-grade testing strategies for .NET applications using xUnit, Moq, FluentAssertions, and WebApplicationFactory. Use when writing unit tests, integration tests, or API tests in .NET or C#, configuring test projects, deciding what to mock vs what to test with real dependencies, setting up shared test…
devbyray/github-copilot-starter
Skill Claude CodeCodex
.NET coding standards and conventions including project structure, dependency injection, and best practices. Use when working with .NET projects, ASP.NET Core, or when the user asks about .NET architecture, dependency injection, async patterns, or project organization.
DamienDoumer/aspnetcore-skills
Skill Claude CodeCodex
Use when scaffolding a new ASP.NET Core solution or adding features to an existing one that must follow Clean Architecture (Domain / Application / Infrastructure / API). Enforces MediatR-based use cases, Minimal APIs organised by feature, route constants, per-layer DI extension methods, command validation via a…
Atypical-Consulting/RoselineMCP
MCP server Claude CodeCodexCursor +2
MCP server "roseline-mcp" as configured in Atypical-Consulting/RoselineMCP. Launched with RoselineMCP.
Skill Claude CodeCodex
Best practices for building WPF desktop applications with C# and .NET. Use when working on WPF projects, .NET desktop apps, XAML UI, MVVM architecture, system tray apps, or any C# project using Windows Presentation Foundation.
syncfusion/blazor-ui-components-skills
Skill Claude CodeCodex
Implement Syncfusion Blazor Input components including FileUpload, TextBox, NumericTextBox, TextArea, Signature, RangeSlider, OtpInput, Rating, InputMask, and ColorPicker. Use this when working with file uploads, text entry, numeric values, multi-line text inputs, signatures, ratings, or color selection. This skill…
MCP server Claude CodeCodexCursor +2
MCP server "TestAtlas.Mcp" as configured in Karzone/TestAtlas. Launched with TestAtlas.Mcp.
Skill Claude CodeCodex
.NET assembly decompiler CLI tool. Invoke when user needs to decompile DLL/EXE files, reverse engineer .NET assemblies, extract C# source code from compiled binaries, or analyze .NET metadata.
Skill Claude CodeCodex
You have full control over Unity Editor via 24 MCP tools. This skill teaches you how to use them effectively.
microsoft/opentelemetry-distro-dotnet
Skill Claude CodeCodex ✓ vendor
Set up Microsoft.OpenTelemetry distro in a new .NET application. Use when adding observability to an agent, ASP.NET Core app, console app, or Agent Framework project. Covers package installation, exporter configuration, token resolver setup, baggage context, and instrumentation options.
Skill Claude CodeCodex
Architecture rules, naming conventions, and CQRS handler patterns for this .NET solution. Load this whenever generating, reviewing, or refactoring C# code in this repository so output matches the existing codebase instead of generic patterns.
TripleZeroLabs/TripleZeroLabs.Os2
Skill Claude CodeCodex
Apply the OS2 WPF theme (TripleZeroLabs.Os2) correctly in any XAML or C# file. Activate when building or editing a WPF window, page, view, or UserControl; styling any WPF control (Button, TextBox, DataGrid, ComboBox, CheckBox, nav sidebar, tabs, dialog, banner); building a settings screen, form, dashboard, or toolbar…
chicongst/agent-skills-installer
Skill Claude CodeCodex
Safely refactor .NET / C# code at Senior Engineer level — diagnose code smells, classify risk (SAFE/RISKY/DANGEROUS), check the test safety net (or add characterization tests first), apply smallest-change-at-a-time for one smell, preserve behavior, match project convention. Use when the code being rewritten…
Skill Codex
A text-based tutor for learning C# and .NET, the Microsoft platform used to build applications and services. It guides learners from first programs toward junior backend development.
Hyeonu-Cha/dotnet-coverage-mcp
Skill Claude CodeCodex
Iteratively write .NET unit tests to improve code coverage toward 80% line and branch targets. USE FOR: autonomously running tests, finding gaps, writing targeted tests, and repeating until 80% coverage or plateau. Calls all 7 dotnet-coverage-mcp MCP tools: GetSourceFiles, RunTestsWithCoverage, GetCoverageSummary…
DenisRaimondi/lombardia-trains-mcp
MCP server Claude CodeCodexCursor +2
MCP server "lombardia-trains" as configured in DenisRaimondi/lombardia-trains-mcp. Launched with LombardiaTrains.Mcp.
MCP server Claude CodeCodexCursor +2
MCP server "loadbearing" as configured in andypgray/loadbearing. Launched with Zphil.LoadBearing.Cli. Needs 1 environment variable to run.
MCP server Claude CodeCodexCursor +2
Progressive on-demand access to .NET NuGet package source for AI coding agents. Runs locally from the mcp-digger npm package.
MCP server Claude CodeCodexCursor +2
NuGet MCP — .NET package registry. Remote server at gateway.pipeworx.io.
MCP server Claude CodeCodexCursor +2
MCP server "mcp-dotnet" as configured in beekamai/mcp-dotnet. Runs locally from the mcp-dotnet npm package.
MCP server Claude CodeCodexCursor +2
Model Context Protocol server for FxKit C# functional programming library documentation. Runs locally from the @taxfyle/fxkit-mcp npm package.
Skill Claude CodeCodex
DKNet EF Core Specifications - Build reusable, composable, and type-safe queries with dynamic predicates and the Specification Pattern.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: