Agent Skills
For engineers and researchers who build AI systems
Agent-skill repos worth installing: official Anthropic skills, community collections, and MCP servers — with setup commands.
How skills install
A skill is a folder with a SKILL.md that an agent loads on demand. Three ways in: register a repo as a plugin marketplace (/plugin marketplace add owner/repo), clone individual skills into ~/.claude/skills/, or upload them via the API for hosted agents.
Official skills
Anthropic-maintained Agent Skills — folders of instructions and scripts an agent loads on demand. The fastest way to make Claude Code better at documents, testing, and repeatable workflows.
The public Agent Skills repository: document creation/editing (docx, xlsx, pptx, pdf), skill-creator, MCP server generation, and more. Registers directly as a Claude Code plugin marketplace.
/plugin marketplace add anthropics/skills
Claude Code skills that take a founder from idea to a live managed agent: interview, scope a v0, launch, grade it, iterate, and schedule it.
How skills work: SKILL.md structure, progressive disclosure, loading behavior, and using skills via the API, Claude Code, and claude.ai.
Community skill collections
Battle-tested skills and curated indexes from the community. Install as plugin marketplaces or clone individual skills into ~/.claude/skills/.
An agentic skills framework and software development methodology: 20+ skills including brainstorming, plan writing, plan execution, and a skills-search tool.
/plugin marketplace add obra/superpowers-marketplace /plugin install superpowers@superpowers-marketplace
Curated list of Claude Skills, resources, and tools for customizing Claude workflows — particularly Claude Code.
A second large curated index of Claude Skills, organized by workflow category.
Curated slash commands, CLAUDE.md files, CLI tools, and workflow patterns for Claude Code.
Directory of skills, plugins, memory providers, tools, and guides for Nous Research's open-source Hermes Agent.
MCP servers
Model Context Protocol servers connect agents to external tools and data. One server works across Claude, Cursor, ChatGPT, and other MCP clients.
The official MCP servers repository — reference implementations (filesystem, git, fetch, memory) plus a large index of community servers.
The largest curated list of MCP servers, organized by category from databases to browsers to finance.
Protocol spec, quickstarts, and SDKs. MCP is governed by the Agentic AI Foundation under the Linux Foundation.