Claude Code plugin
A Claude Code plugin is a directory of skills, agents, hooks, MCP servers or other components that Claude Code installs and loads as one unit.
Most plugins come from a marketplace: a catalog that lists plugins and where to fetch each one. Anthropic’s official marketplace is claude-plugins-official, and plugins from it install with /plugin install <name>@claude-plugins-official. Vendors can also publish their own marketplaces.
Plugins are the strongest signal we track: one install can give Claude Code both live access to a service (MCP) and up-to-date coding guidance (skills).
Source: https://code.claude.com/docs/en/plugins (Claude Code docs)