Claude Code plugins and MCP servers we use at 2389.

Add the marketplace:

/plugin marketplace add 2389-research/claude-plugins

Install plugins individually:

/plugin install css-development@2389-research
/plugin install firebase-development@2389-research
/plugin install terminal-title@2389-research

This marketplace also lists external MCP servers:

• agent-drugs - Digital drugs that modify AI behavior through prompt injection
• socialmedia - Social media functionality for AI agents
• journal - Private journaling capability for Claude

Browse the marketplace: https://2389-research.github.io/claude-plugins

This is a monorepo containing multiple independent plugins. Each plugin:

• Lives in its own directory (css-development/, firebase-development/, etc.)
• Has its own .claude-plugin/plugin.json configuration
• Contains its own skills, docs, and tests
• Can be installed independently

See CLAUDE.md for developer documentation on the monorepo structure and conventions.

1. Create plugin directory: mkdir -p new-plugin/.claude-plugin
2. Write new-plugin/.claude-plugin/plugin.json
3. Add skills to new-plugin/skills/
4. Create new-plugin/README.md and new-plugin/CLAUDE.md
5. Update .claude-plugin/marketplace.json with new plugin entry
6. Regenerate marketplace site: npm run generate

See docs/DEVELOPMENT.md for comprehensive development guide.

Want to chat about these plugins or how we use Claude Code?

Email us: hello@2389.ai

We'd love to hear from you!

• Claude Code Documentation: https://docs.claude.com/en/docs/claude-code
• Skills Guide: https://docs.claude.com/en/docs/claude-code/skills
• Plugin Development: https://docs.claude.com/en/docs/claude-code/plugins