GitHub Copilot skills, plugins, subagents, slash commands and mcp servers

nuget-manager official github skill Manages NuGet packages in .NET projects through the dotnet CLI. Use it when adding, removing, or updating package dependencies. 14,360installs microsoft-code-reference official github skill Checks Microsoft APIs and SDK code against official docs, finds working samples, and helps debug Azure and .NET issues. 14,251installs sql-code-review official github skill Reviews SQL for security and performance issues, as well as maintainability. Use it when checking queries or a database schema. 14,060installs web-design-reviewer official github skill This skill inspects a running website, spots layout, responsive, and accessibility issues, and can fix them in the source code. Use it when a UI review should lead to verified code changes. 13,957installs playwright-automation-fill-in-form official github skill Fills a preset form through Playwright MCP, uploads an image, and stops before submission. It fits the Playwright Live demo scenario. 13,693installs create-specification official github skill This skill creates a structured Markdown specification with requirements, constraints, and interfaces. Use it when an AI agent needs a clear project contract. 13,537installs javascript-typescript-jest official github skill This skill guides GitHub Copilot in writing JavaScript and TypeScript tests with Jest. Use it when you want concrete patterns for mocks, async tests, and test organization. 13,172installs game-engine official github skill Guides GitHub Copilot when building browser games and game engines with HTML5 and JavaScript. Use it for 2D or 3D rendering, physics, collisions, and controls. 13,140installs create-agentsmd official github skill Generates an AGENTS.md file with repository context and instructions for coding agents. Use it when project rules need a clear, agent-focused home. 13,104installs refactor-plan official github skill This skill investigates a codebase and writes a step-by-step multi-file refactor plan before edits begin. Use it when the proposed change needs review first. 12,965installs memory-merger official github skill Moves mature notes from a domain memory file into its instruction file. Useful when project guidance grows through reviewed lessons. 12,846installs pytest-coverage official github skill Runs pytest with coverage, flags lines that tests miss, and guides work toward 100% line coverage. Use it when coverage gaps need concrete test cases. 12,826installs penpot-uiux-design official github skill A skill for building interfaces in Penpot via MCP tools: web, mobile, dashboards, design systems. Works with Penpot API directly from your code editor. 12,782installs postgresql-code-review official github skill Reviews SQL and database schemas for PostgreSQL-specific issues. Use it before reviewing migrations, JSONB queries, functions, or access rules. 12,608installs create-implementation-plan official github skill This skill creates a Markdown implementation plan for features, refactoring, package upgrades, or infrastructure work. Use it when an agent needs an explicit task breakdown. 12,558installs architecture-blueprint-generator official github skill Analyzes a codebase and creates an architecture blueprint with components, dependencies, and diagrams. Use it before extending a project or onboarding developers. 12,196installs typescript-mcp-server-generator official github skill Generates a TypeScript MCP server project with tools, resources, and configuration. Use it when a new server should start on the MCP TypeScript SDK v2. 12,050installs java-junit official github skill Writes, reviews and fixes Java tests with JUnit, AssertJ and Mockito. Use it when adding, refactoring or debugging tests in Maven and Gradle projects. 11,632installs dotnet-design-pattern-review official github skill Reviews selected C#/.NET code for design patterns and suggests improvements without editing files. Use it when you need an architecture-focused code review. 11,609installs dotnet-upgrade official github skill Plan a .NET upgrade by reviewing project dependencies, choosing a migration order and preparing post-upgrade checks. 11,475installs apple-appstore-reviewer official github skill Reviews an iOS project from an Apple App Store reviewer’s perspective and ranks rejection risks. Use it before submitting an app for review. 11,295installs update-implementation-plan official github skill Updates an existing implementation plan for new requirements, refactoring, package upgrades, or architecture changes. Use it when a plan needs actionable tasks and checks. 11,107installs make-repo-contribution official github skill This skill checks repository rules before issues, branches, commits, or pull requests, then guides the contribution workflow. 11,073installs review-and-refactor official github skill Reviews project code against local instructions and refactors parts that need changes. Use it before review or when cleaning up an existing codebase. 11,056installs editorconfig official github skill Creates an .editorconfig after reviewing project files and formatting preferences. Use it when a project needs consistent editor rules. 10,960installs 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. 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. 10,752installs create-github-action-workflow-specification official github skill This skill turns an existing GitHub Actions workflow into a formal specification for AI-assisted maintenance and review. 10,745installs python-mcp-server-generator official github skill Builds Python MCP servers that expose functions, APIs, or databases as tools for AI clients. Use it when starting a server with MCP Python SDK v2. 10,418installs 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. 10,328installs agentic-eval official github skill Use evaluation and refinement patterns to improve AI agent outputs. It suits code, reports and analysis with defined quality criteria. 10,213installs create-architectural-decision-record official github skill Creates an architectural decision record for a project. Use it to document why a solution was chosen and what follows from that choice. 10,176installs breakdown-feature-prd official github skill Creates a feature PRD from a parent Epic and a team request. Use it when requirements need to be set before a technical specification is written. 10,022installs refactor-method-complexity-reduce official github skill Refactors a chosen method by moving complex logic into helpers. Use it when nested conditions or branching make a method hard to follow. 9,992installs pdftk-server official github skill This GitHub Copilot skill guides PDF work through the pdftk CLI, from merging files to filling forms and applying stamps. Use it when PDF changes belong in a terminal workflow. 9,978installs scoutqa-test official github skill This skill runs exploratory web app tests through the ScoutQA CLI. Use it to check a user flow, accessibility, or a feature after making changes. 9,967installs powerbi-modeling official github skill This skill helps build and review Power BI semantic models, write DAX, and configure relationships. Use it when the model includes RLS or complex calculations. 9,934installs nano-banana-pro-openrouter official github skill Generates and edits images through OpenRouter with Gemini 3 Pro Image. Use it for text-to-image work, file edits, and multi-image compositions. 9,910installs markdown-to-html official github skill This skill guides Markdown-to-HTML conversion and custom conversion scripts. Use it for HTML documentation, static sites, or rendering .md files for preview. 9,899installs meeting-minutes official github skill Turns a transcript or rough notes into short internal meeting minutes: decisions, action items with owner and due date, open questions. 9,881installs