2389 Research Claude Code Plugin Marketplace

28 plugins and MCP servers for Claude Code — parallel exploration, iterative refinement, binary reverse engineering, structured decision-making, and more.

Built by the team at 2389. These are the tools we use every day.

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

Quick Start

Install any plugin in any agent (Claude Code, Cursor, Codex, …) with vercel-labs/skills:

npx skills add 2389-research/simmer

Or natively in Claude Code:

# Add the marketplace, then install any plugin
/plugin marketplace add 2389-research/claude-plugins
/plugin install simmer@2389-research

The 4 MCP servers (journal, socialmedia, slack-mcp, agent-drugs) install via Claude Code only — they ship no skills for npx.

Available Plugins

Meta Plugins

Plugin	Description
botboard-biz	Social media and journaling capabilities for AI agents
better-dev	CSS, Firebase, code quality, testing, parallel exploration, docs verification, codegen
sysadmin	Structured Linux maintenance and diagnostics

Development

Plugin	Description
css-development	CSS workflows with Tailwind, semantic naming, dark mode by default
firebase-development	Firebase project workflows: setup, features, debugging, validation
landing-page-design	High-converting landing pages with anti-AI-slop principles
xtool	Xcode-free iOS development with xtool via SwiftPM
building-multiagent-systems	Architecture patterns for multi-agent systems
speed-run	Token-efficient code generation with hosted LLM (Cerebras)
thrifty	Tiered-delegation execution: Sonnet plans a spec into sprints, cheap Haiku executes + self-verifies; ~64% cheaper than Opus
binary-re	Agentic binary reverse engineering for ELF binaries

Testing and Quality

Plugin	Description
test-kitchen	Parallel exploration of implementation approaches
simmer	Iterative artifact refinement with investigation-first judges
scenario-testing	End-to-end testing with real dependencies, no mocks
fresh-eyes-review	Final sanity check before commits/PRs
documentation-audit	Verify documentation against codebase reality
review-squad	Dispatch panels of specialized subagents for project review
prbuddy	PR health assistant: CI monitoring, review triage, fixes
git-repo-prep	Prepare codebases for public/open-source release

Business and Strategy

Plugin	Description
ceo-personal-os	Personal operating system for executives
worldview-synthesis	Systematic worldview articulation
deliberation	Decision-making through deliberation and discernment
summarize-meetings	Batch-process meeting transcripts into structured summaries

Utilities

Plugin	Description
terminal-title	Auto-update terminal title with emoji + project + topic
remote-system-maintenance	Linux system diagnostics and maintenance via SSH/tmux

MCP Servers

Server	Description
agent-drugs	Digital drugs that modify AI behavior through prompt injection
socialmedia	Social media functionality for AI agents
journal	Private journaling capability for Claude
slack-mcp	Slack workspace integration MCP server

Adding a Plugin

1. Create a GitHub repo under 2389-research/ with standard plugin structure
2. Add an entry to .claude-plugin/marketplace.json
3. Run npm run generate to update the marketplace site
4. Commit and push

See CLAUDE.md for the full marketplace.json format and detailed instructions.

Like this?

If these plugins save you time, a ⭐ helps us know what's landing. We build what people use.

Contact

Email: hello@2389.ai — we'd love to hear what you're building with these.

License

MIT