Anthropic's plugins are developed in claude-plugins-official. The claude-code-plugins marketplace in this repository still lists them, and installs them from there. The claude-opus-4-5-migration plugin has been retired.
Claude Code plugins are extensions that enhance Claude Code with custom slash commands, specialized agents, hooks, and MCP servers. Plugins can be shared across projects and teams, providing consistent tooling and workflows.
Learn more in the official plugins documentation.
To use plugins in your own projects:
- Install Claude Code globally:
npm install -g @anthropic-ai/claude-code- Navigate to your project and run Claude Code:
claude- Use the
/plugincommand to install plugins from marketplaces, or configure them in your project's.claude/settings.json.
For detailed plugin installation and configuration, see the official documentation.
Each plugin follows the standard Claude Code plugin structure:
plugin-name/
├── .claude-plugin/
│ └── plugin.json # Plugin metadata
├── commands/ # Slash commands (optional)
├── agents/ # Specialized agents (optional)
├── skills/ # Agent Skills (optional)
├── hooks/ # Event handlers (optional)
├── .mcp.json # External tool configuration (optional)
└── README.md # Plugin documentation
New plugins belong in claude-plugins-official.