A Claude Code plugin is a folder of skills, subagents, hooks and MCP servers that installs with one `/plugin install` command. I went through Anthropic's docs to explain plugins and marketplaces, installing and removing them, what's inside Everything Claude Code and which plugins to pick.
An Agent Skill is a folder with a SKILL.md file that teaches an AI agent one task, such as proofreading text, building a slide deck or reviewing code. Here is how skills are built, which agents run them and what the risks are.
Claude Code skills are folders with a SKILL.md file that teach the agent to plan, review code, handle documents and remember a project. I'd start with five: Superpowers, the Karpathy guidelines, Planning with Files, Anthropic's document skills and the Codex plugin for review.
An MCP server is a small program that lets an AI agent such as Claude Code, Cursor or Codex work with an outside service: your files, a database, a browser, an issue tracker. Here is how it works, how to connect one and what the risks are.
Catalog entries mentioned most often in the author’s posts.
