116 documented

Skills · plugins · MCP · rules114 official

Which agent do you use?

Pick your host to see what plugs into it. Every entry is documented from its official repository or docs, with install steps, permissions and limits.

Claude Code84 extensions OpenAI Codex14 extensions

Cursor32 extensions Windsurf14 extensions

Gemini CLI9 extensions

GitHub Copilot1 extensions Any MCP client46 extensions

Skill · 19Reusable instructions and scripts the agent loads for a taskAlgorithmic Art, brand-guidelines, Canvas Design… Plugin · 42Bundles of skills, commands, hooks and agentsAgent SDK Development Plugin, C# LSP, clangd LSP… MCP server · 49Connect the agent to tools, data and servicesApify MCP Server, Atlassian Rovo MCP Server, AWS API MCP Server… Rules & instructions · 6Project instructions the agent reads every sessionAGENTS.md, CLAUDE.md, Cursor Rules…

MCP servers for Claude Code and Cursor Claude Code plugins and marketplace Claude Code skills Cursor rules What is an MCP server? A plain explanation for 2026

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Rules & instructions

Windsurf Rules and Memories

by Windsurf (Cognition)

Windsurf Cascade rules: global, workspace and enterprise rule files plus AGENTS.md support and auto-generated memories.

Does: 5 things
Install: 4 steps
Works with: Windsurf

Skill Proprietary (LICENSE.txt in skill folder

xlsx

by Anthropic

Open, create, edit and clean spreadsheets (.xlsx, .xlsm, .csv, .tsv) with formulas, formatting and charts.

Does: 3 things
Install: 4 steps
Works with: Claude Code

Zapier MCP

by Zapier

Zapier-hosted MCP server that lets Claude, Cursor and other clients take actions across 9,000+ apps with managed auth.

Does: 5 things
Install: 5 steps
Works with: 3 hosts