Plugin

Not the same as an MCP server

An MCP server gives the agent tools to call. A plugin is a package that can carry MCP servers alongside skills, subagents and hooks, installed and switched on as one unit, so a single install can change several things about every session.

Where it bites

An enabled plugin is part of every session, not only the ones where you use it: the names and descriptions of its skills and agents take up context on every turn, its hooks fire at their events, and whatever it runs, it runs as you. Disable the ones you are not using.

Covered in these lessons

• Plugins and marketplaces
• A shared kit for the team
• Testing and publishing a plugin

Related terms