Programming languages: skills, plugins, subagents, slash commands and mcp servers

dotnet-upgrade official github skill Plan a .NET upgrade by reviewing project dependencies, choosing a migration order and preparing post-upgrade checks. GitHub Copilot 11,475installs editorconfig official github skill Creates an .editorconfig after reviewing project files and formatting preferences. Use it when a project needs consistent editor rules. GitHub Copilot 10,960installs code-simplifier rtk-ai skill Reviews Rust code in RTK to remove over-engineering and needless allocations. It applies idiomatic simplifications without altering runtime behavior. Claude Code CX Codex Cursor +1 2,100installs rtk-tdd rtk-ai skill This skill enforces a Red-Green-Refactor workflow for Rust and activates on implementation, testing, refactoring, and bug-fixing tasks. Claude Code CX Codex Cursor +1 2,100installs csharp-async official github skill This skill guides Copilot through C# async best practices and flags common mistakes. Use it when reviewing async methods, tasks, and public APIs. GitHub Copilot 10,883installs java-docs official github skill Guides Javadoc work for Java types while following the project’s documentation style. Use it when adding or revising API comments. GitHub Copilot 10,752installs typescript-expert sickn33 skill A skill for TypeScript and JavaScript work: it reads your project setup, fixes type errors and speeds up type checking. Useful once a TS codebase gets big. Claude Code CX Codex Cursor +1 12,600installs csharp-xunit official github skill This skill guides C# unit testing with XUnit, including data-driven cases. Use it when creating or reviewing tests in a .NET project. GitHub Copilot 10,328installs design-patterns rtk-ai skill Provides Rust architectural patterns for RTK CLI filter modules. Helps select Newtype, Builder, State Machine, and RAII during module design and refactoring. Claude Code CX Codex Cursor +1 1,900installs dataverse-python-production-code official github skill Guides GitHub Copilot to write Python code for the Dataverse SDK with error handling, request retries, and OData query rules. GitHub Copilot 9,803installs kotlin-springboot official github skill This skill guides Spring Boot and Kotlin work, from project structure to tests and coroutines. Use it when an agent is writing or reviewing a backend service. GitHub Copilot 9,781installs csharp-docs official github skill Guides XML documentation for C# types and members. Use it when a project needs consistent API comments and tag conventions. GitHub Copilot 9,666installs write-coding-standards-from-file official github skill This skill derives project coding standards from existing files or folders. Use it when the repository needs a style guide based on code already in place. GitHub Copilot 9,570installs java-refactoring-extract-method official github skill This skill guides Extract Method refactoring for complex Java methods while preserving behaviour. Use it when a method needs smaller, focused units backed by tests. GitHub Copilot 9,284installs add-educational-comments official github skill Adds educational comments to a specified code file, tailored to the reader's knowledge level. Use it when a source file needs to work as a learning resource. GitHub Copilot 9,243installs dataverse-python-advanced-patterns official github skill Guides GitHub Copilot to generate Dataverse Python code with error recovery, batch work, and OData query patterns. GitHub Copilot 9,213installs go-mcp-server-generator official github skill Generates a production-ready Go MCP server project with the official SDK, typed tools, tests, and documentation. GitHub Copilot 9,200installs rust-mcp-server-generator official github skill Generate a Rust MCP server project with tools, prompts, resources, and an integration test. Use it when you want a project scaffold based on the official rmcp SDK. GitHub Copilot 9,181installs aspnet-minimal-api-openapi official github skill Create typed ASP.NET Minimal API endpoints with OpenAPI documentation. Use it when an API needs a clear structure and described request and response contracts. GitHub Copilot 9,176installs quasi-coder official github skill This skill turns shorthand, quasi-code, and natural-language requests into working implementations. Use it when requirements are incomplete, imprecise, or mix technical terms. GitHub Copilot 9,100installs technology-stack-blueprint-generator official github skill This skill scans a codebase and builds a blueprint of its stack, architecture, and coding practices. Use it to document an existing project before making changes or generating more code. GitHub Copilot 9,000installs remember-interactive-programming official github skill Keeps the agent focused on live REPL exploration and the current system state. Useful for interactive programming, especially in Clojure. GitHub Copilot 9,000installs csharp-nunit official github skill Guides GitHub Copilot when writing NUnit unit tests in C#, including data-driven cases. Use it when a project needs consistent test conventions. GitHub Copilot 9,000installs java-refactoring-remove-parameter official github skill This skill guides an agent through removing unused or derivable parameters from Java methods and updating their callers. Use it when the change must preserve behavior and be checked with tests. GitHub Copilot 8,900installs csharp-mstest official github skill Guides GitHub Copilot through MSTest 3.x/4.x unit tests, from test structure to assertions and data-driven cases. Use it when working on C# test code. GitHub Copilot 8,900installs copilot-instructions-blueprint-generator official github skill Creates a blueprint for copilot-instructions.md from the repository’s architecture, code patterns, and technology versions. Useful when Copilot needs project-specific guidance. GitHub Copilot 8,900installs comment-code-generate-a-tutorial official github skill Refactors a Python script, adds instructional comments, and writes a tutorial README.md. Use it when a script needs to be understandable for beginners. GitHub Copilot 8,900installs swift-mcp-server-generator official github skill This skill generates a Swift MCP server project with the official Swift SDK. Use it when you need a ready project layout for tools, resources, and prompts. GitHub Copilot 8,800installs java-mcp-server-generator official github skill This skill creates a Java or Spring Boot MCP server for exposing code, APIs, or databases to AI agents. Use it when you need a project scaffold with tests. GitHub Copilot 8,800installs csharp-tunit official github skill This skill guides TUnit unit testing in .NET, including data-driven cases. Use it when writing new tests or moving a suite from xUnit. GitHub Copilot 8,800installs code-exemplars-blueprint-generator official github skill Generates a configurable prompt that finds strong code examples in a repository and turns them into exemplars.md. Useful when a team needs visible coding patterns. GitHub Copilot 8,800installs error-handling-patterns Seth Hobson skill This skill covers exceptions, Result types, error propagation, and graceful degradation. Use it when designing APIs or debugging failures. Claude Code CX Codex Cursor 22,957installs python-design-patterns Seth Hobson skill Use it to shape Python components, separate responsibilities, and decide when repeated code deserves an abstraction. It fits design and refactoring work. Claude Code CX Codex Cursor 22,842installs kotlin-mcp-server-generator official github skill This skill generates a Kotlin MCP server project with Gradle, the official SDK, and starter tools. Use it when you need a structured server scaffold. GitHub Copilot 8,700installs java-add-graalvm-native-image-support official github skill This skill adds GraalVM Native Image support to a Java project, builds the executable, and works through build errors. Use it when you need a native build while keeping the JVM path intact. GitHub Copilot 8,700installs dataverse-python-usecase-builder official github skill This skill turns Dataverse use cases into Python solution designs, data models, and implementation guidance. Use it when an agent needs to plan a complete SDK workflow. GitHub Copilot 8,700installs dataverse-python-quickstart official github skill Generates Python examples for the Microsoft Dataverse SDK, including setup, CRUD, bulk requests, and paged queries. Use it when building a Dataverse integration in Python. GitHub Copilot 8,700installs containerize-aspnet-framework official github skill This skill prepares a Windows-container Dockerfile for an ASP.NET .NET Framework project. Use it when the image needs project-specific IIS, dependency, or build settings. GitHub Copilot 8,700installs ruby-mcp-server-generator official github skill Generates a Ruby MCP server project using the official SDK. Use it when you want tools, prompts, resources, and tests in the initial project. GitHub Copilot 8,600installs modern-javascript-patterns Seth Hobson skill This skill guides JavaScript refactors and async work with ES6+ syntax and functional patterns. It includes practical recommendations for code structure. Claude Code CX Codex Cursor 21,553installs