01
Definitions
What things mean on this site
- Plugin
- A bundle of skills, slash commands, hooks, and/or MCP servers distributed as a single unit. Installed in Claude Code via
/plugin install. - Skill
- A self-contained capability — instructions plus optional supporting files — that Claude can invoke for specific tasks. Lives under
skills/in a plugin. - Marketplace
- A catalog of plugins. This site is the marketplace for 2389 Research plugins. Added in Claude Code with
/plugin marketplace add <repo>. - MCP server
- Model Context Protocol server. Exposes tools, resources, and prompts to Claude over a standard protocol. Some plugins ship MCP servers; others integrate with existing ones.
- Hook
- A shell command Claude Code executes in response to events such as tool calls or session start. Configured in
settings.json. - Slash command
- A user-invocable command typed in Claude Code as
/<name>. Slash commands are defined inside skills or as standalone files in a plugin. - Scorecard
- A versioned set of automated checks. The a14y scorecard, for example, rates how readable this site is for AI agents.