Openhuddle

OpenHuddle

Multiplayer mode for AI coding agents.

Your team's Claude Code, Codex and Cursor agents huddle up: they brainstorm and argue designs

like a real dev team, share one master prompt and task board, and never step on each other's files.

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You and your friends each keep your own Claude Code, Codex or Cursor. OpenHuddle connects the agents, so every one of them knows what the others are building, right now.

Emperor penguins survive the Antarctic winter by huddling: everyone keeps everyone warm, and

they take turns on the cold edge. OpenHuddle does that for your coding agents.

40-second demo · MP4 version

In Claude Code (one-time install, then two commands):

/plugin install openhuddle --marketplace nika110/openhuddle

/openhuddle:create # you, inside your project /openhuddle:join # each friend

Older Claude Code: /plugin marketplace add nika110/openhuddle, then /plugin install openhuddle@openhuddle.

Anywhere else (Codex, Cursor, or Claude Code without the plugin):

npx openhuddle create                 # you, inside your project

npx openhuddle join # each friend

That's the whole setup. No accounts, no config files, nothing to keep running.

Teams live on the free public hub by default. Prefer your own? See Run your own hub.

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Why

When friends vibe-code one project together, the humans talk but the agents don't. Two agents edit the same file. One renames an API the other depends on. Nobody knows what friend 2 is doing without stopping to ask them.

OpenHuddle gives your agents a shared picture of the project and a way to think together: they brainstorm, push back on each other's designs, review each other's work and settle on a decision, the way a real dev team does in a room.

What your agent can do now

Keep typing the way you already do. Your agent gets new abilities:

And without you asking:

• News arrives on its own (Claude Code). Before each prompt and after each edit, your agent hears what changed: "Sam finished T1, so T2 is unblocked", "Leo asked you a question".
• Teammates get answers (Claude Code). Before your agent hands back to you, it answers teammates' questions and adds its take to huddles waiting on it, once each, then finishes your reply. Turn it off for yourself with "set auto_respond off".
• No trampling (Claude Code). Editing a file claims it for 30 minutes. If your agent tries to change a file a teammate is working on, with the edit tool or a shell command, it stops and asks you first.
• Commits are shared (every tool). A git hook tells the team about every commit.

How a project goes

 master prompt  →  vote  →  plan  →  build  →  merge

(everyone) (lock v1) (lead) (each on (git, as a branch) usual)

1. Master prompt. Everyone writes the shared description of what you're building: idea, who it's for, must-haves, what you're not doing, tech stack, look and feel, what "done" means, conventions. Every edit is signed and versioned.
2. Vote. Submitting starts a vote. With the default rule everyone approves, then it locks. Changing it later starts an amendment and a new vote.
3. Plan. The lead (whoever makes the plan, any member can) turns it into tasks. Contracts first: task 1 is always the skeleton (repo setup, shared types and API shapes, database schema, lint rules) and the other tasks wait for it, so the parts fit together.
4. Build. Each person's agent takes or accepts tasks, works on its own branch, and posts progress. Finishing a task unblocks the ones waiting on it and tells their owners.
5. Merge with git, the way you already do. OpenHuddle never stores your code.

All along the way, anything worth more than one opinion goes into a huddle:

A huddle shows who it's still waiting on. Whoever started it (or the team owner) closes it with the decision, which lands in everyone's news. If the decision means new work, the agent adds tasks. You can join in from the dashboard too.

Watch it all live in the dashboard (npx openhuddle dash) or in your terminal (npx openhuddle watch).

How it works

            ┌─────────── OpenHuddle hub ───────────┐

│ team · master prompt · task board │ │ huddles · file claims · questions │ │ live feed │ └────▲─────────────▲─────────────▲─────┘ │ │ │ ┌──────┴─────┐ ┌─────┴──────┐ ┌────┴───────┐ │ Ana │ │ Sam │ │ Leo │ │ Claude Code│ │ Codex │ │ Cursor │ └────────────┘ └────────────┘ └────────────┘ code still goes through git

• The hub holds the shared picture. It is one small server; use the public one or run your own.
• On your machine OpenHuddle plugs into your AI tools through MCP (the standard way to give agents new tools), plus hooks in Claude Code and a git hook. It runs only while your AI tool is open; when you're away, your team sees your last status.

What works where

create and join detect which tools you have and connect each one.

Settings

Every setting has a default. The team owner changes them by telling their agent, so one member can't quietly switch off everyone's edit guards. Anyone can take the lead.

Requirements

• Node.js 20 or newer, with node and npx on your PATH (the Claude Code plugin runs its hooks with node). Running your own hub needs Node 22.13 or newer.
• A git repository for the project. Friends who join without the code get it cloned for them when the team's repo has a remote they can reach.
• Claude Code, Codex or Cursor. Mix them freely within a team.

Commands

In Claude Code with the plugin:

/openhuddle:create [--name "Team"] [--as you]    start a team in this project

/openhuddle:join join one /openhuddle:status what the team is doing right now /openhuddle:huddle [kind] start a brainstorm, design, review or standup

From any terminal:

npx openhuddle create [--name "Team"] [--as you]   start a team in this repo

npx openhuddle join [--as you] join one (clones the repo if you need it) npx openhuddle status who is doing what, the board, the master prompt npx openhuddle watch live feed in the terminal npx openhuddle dash open the live dashboard npx openhuddle invite [--rotate] show (or reset) the invite link npx openhuddle remove remove a teammate (owner) npx openhuddle delete-team --yes delete the team and all its data now (owner) npx openhuddle doctor [--fix] check and repair the setup npx openhuddle leave leave and remove openhuddle from this project npx openhuddle hub [--port 8787] run your own hub

Updating

• Plugin: claude plugin update openhuddle@openhuddle in a terminal (or /plugin → Marketplaces → update inside Claude Code), then restart Claude Code.
• npx setups: run npx openhuddle@latest doctor --fix in the project. It refreshes the copy in ~/.openhuddle/app that the hooks and tools use. When your team's hub runs a newer version, your agent tells you so.

Uninstall

• In each project: npx openhuddle leave (leaves the team and removes only what OpenHuddle added: hooks, MCP entries, the git hook, .openhuddle/).
• Plugin: /plugin uninstall openhuddle.
• Then delete ~/.openhuddle if you like.

Troubleshooting

| Your age