Skills, MCP servers and plugins that work with GitHub Copilot

An agent-harness optimization system covering skills, memory, security and research-first workflows for Claude Code and other agents.

Design skill that generates a UI/UX design system (style, palette, typography, layout pattern) for a project; installs as a Claude Code plugin or via CLI.

A /graphify skill and CLI that maps a codebase, docs and PDFs into a queryable knowledge graph; code parsing runs locally via tree-sitter, per its README.

Engineering workflow skills for AI coding agents covering spec, plan, build, test, review and ship, with matching slash commands.

A large curated list of MCP servers.

Design skill for coding agents with commands such as polish, bolder, critique and audit to steer and review frontend UI; installs via npx for Claude Code, Cursor, Codex and others.

HeyGen's open-source framework that renders HTML, CSS and seekable animations to MP4 video, with agent skills and a Claude Code plugin.

Agent skill that draws diagrams as one self-contained HTML + SVG file across 45 diagram types; also installs as a Claude Code or Codex plugin.

Agent skill that rewrites AI-generated text to remove common AI-writing patterns, based on Wikipedia's Signs of AI writing guide.

Marketing skills for Claude Code and other agents: conversion optimization, copywriting, SEO, analytics and growth.

A library of agent skills for scientific research workflows.

Chrome DevTools for coding agents, exposed as an MCP server.

Local MCP server that indexes a codebase into a knowledge graph for code search, call tracing and architecture queries; written in C.

A multi-harness plugin marketplace for Claude Code, Codex, Cursor, OpenCode, GitHub Copilot and others.

Microsoft's Playwright MCP server, which lets agents drive a browser.

Curated list of Agent Skills from vendor engineering teams and the community, with install paths for Claude Code, Codex, Cursor and other clients.

Agent skill that keeps task_plan.md, findings.md and progress.md on disk and re-injects the plan via hooks so it survives /clear and compaction.

Every's Compound Engineering plugin for Claude Code, Codex, Cursor and more.

MCP server giving AI assistants documentation, properties and operations for n8n workflow nodes, with optional workflow management via the n8n API.

Trail-code (formerly graft): local code index and team-learnings layer that gives Claude Code, Cursor, Codex and other agents codebase context; optional Trail workspace.

MCP server that gives an agent terminal command execution, process control, file search and diff-based file editing on your machine.

A skills-based software development methodology for coding agents, installed as a plugin.

Agent skill that researches a topic across Reddit, X, YouTube, Hacker News, Polymarket, GitHub and the web from the last 30 days and summarizes it.

AWS Labs' open-source MCP servers for AWS services.

Local, browser-based review surface where you annotate coding-agent plans, specs and code diffs and send the feedback back to the agent via hooks.

Claude Code plugin that runs several AI providers (Codex, Copilot, Ollama, Perplexity and others) on one task and flags where they disagree.

Open-source Kubernetes UI in one binary (topology, Helm, GitOps, traffic, audits) with a built-in MCP server that lets AI agents inspect clusters.

GitHub's official MCP server for working with repositories, issues and pull requests from an agent.

ARIS: Markdown skills for autonomous ML research workflows (idea discovery, experiments, paper writing) with cross-model review; also ships plugins and a CLI.

Apify's MCP server that connects agents to Apify Store scrapers and crawlers for web and social data extraction.

Microsoft's open-source Model Context Protocol curriculum, with lessons and examples in .NET, Java, TypeScript, JavaScript, Rust and Python.

MCP server and Claude Code plugin that sandboxes tool output to save context and keeps session history in SQLite; source-available under Elastic License 2.0.

An MCP toolkit that gives agents semantic code retrieval and editing.

GitHub CLI extension that compiles Markdown agentic workflows into GitHub Actions, running engines such as Copilot, Claude Code or Codex in sandboxed jobs.

Hook that blocks destructive Git and file-system commands and access to secrets before a coding agent runs a tool call; per its README, it is not a sandbox.

Six agent skills for AI code review of architecture, tech debt and tests, with findings cited to classic engineering books; works as a Claude Code plugin or Codex skill.

Five Claude Code skills for academic research, paper drafting, simulated peer review and revision, with human confirmation gates; licensed CC BY-NC 4.0.

The .NET team's curated agent skills and plugins for .NET and C#: builds, MSBuild, NuGet, diagnostics, upgrades, MAUI, data access and AI.

A hand-picked collection of Claude Code resources: workflows, commands, tools and more.

A CLI for analyzing coding-agent token usage and cost from local logs.

An MCP server for the Neon Management API and Neon databases.

GitHub's toolkit for spec-driven development with coding agents.

GitHub's community-contributed collection of Copilot custom agents, instructions, skills, hooks and plugins, also usable as a Copilot plugin marketplace.

The Notion MCP server for reading and writing Notion content from an agent.

Microsoft's catalog of official MCP server implementations, including servers for Azure and other Microsoft services.

Microsoft's local MCP server for Azure DevOps work items, repos, pipelines and wikis; the README recommends its hosted remote server.

Microsoft's agent plugin that bundles Azure skills with the Azure MCP Server and Foundry MCP, for GitHub Copilot, Claude Code and other hosts.

HashiCorp's Terraform MCP server for Terraform registry and workflow automation.

MongoDB's MCP server for connecting to MongoDB databases and Atlas clusters.

Microsoft's plugin marketplace for GitHub Copilot and Claude Code with Power Platform skills: Power Pages, model-driven and canvas apps, PCF, Power Automate.

Redis's MCP server, a natural-language interface for agents to manage and search data in Redis.

Claude Code plugin that sends the same question to several AI coding agents in parallel and summarizes where their answers agree and differ.

Testing and evals platform for MCP servers and apps: playground, OAuth debugger, JSON-RPC traces and CLI. Mostly Apache-2.0; evals code licensed separately.

A curated list of Claude Skills, resources and tools for customizing Claude workflows.