CoSpace turns your Mac or Linux server into shared dev spaces. Teammates join over plain ssh, and people and coding agents work in one place: the same files, the same Claude Code sessions, the same memory.
Why CoSpace
Coding agents keep their sessions and memory as plain files in the home directory. Give everyone the same home, and collaboration comes for free.
One space holds one shared home, so every session is visible to everyone in it.
claude --resume lists everyone's sessionstmux attachGuests install one small file and pair once. After that, a space is one ssh away.
Each space is its own Linux VM, so agents can run without permission prompts.
How it works
The host runs the daemon. Guests only need ssh and the small cospace tool.
One command on an Apple Silicon Mac or a Linux server. The console opens in your browser.
Click New Space, then Invite a Guest. Send the link; it holds a one-time pairing code.
The guest pairs once. From then on, the space works like any other ssh host.
Features
Everything a host needs to open a shared workspace to people they trust, and to close it again in one click.
Set a dollar cap and a concurrency cap for each space. Requests over the limit get a clean 429.
Each guest has their own key. Revoking it cuts their access immediately.
A 14-day token chart and an estimated cost for every space.
Save a space's size, AI selection, model, network, budget and full-auto setting. Stamp out identical spaces.
Turn off outbound Internet for a space. SSH and the AI gateway keep working.
Idle spaces sleep to free memory and wake on the next connection.
Cursor and VS Code Remote-SSH connect by space name. Common dev ports forward to the guest's localhost.
Guests connect peer-to-peer through an embedded Tailscale library, with Tailscale's relays as a fallback. There is no CoSpace server in the middle.
Apple container on macOS 26 or later, Docker on Linux. One VM per space, with a persistent volume.
Architecture
A single Go daemon runs the console, the AI gateway and the spaces. Guests reach a space over ssh; agents in the space reach AI providers only through the gateway.
Security
CoSpace is built for people you trust. It still keeps the host's machine and credentials out of reach.
Get started
The same command upgrades an existing install. Everything is published on GitHub.
Installs the container runtime if needed, the cospaced daemon as a service, and opens the console.
First run downloads the space image once (about 600 MB). New spaces then start in seconds.
Installs the cospace tool (alias co). Then run the pairing line your host sends you.
FAQ
The host provides the AI quota for their spaces. Each space has a dollar cap and a concurrency cap, and the console shows the estimated cost per space. The estimate uses list prices; the host's actual bill may differ.
No. Spaces, the console and the gateway all run on the host's own Mac or Linux server. Install scripts and binaries are published on GitHub, and guests connect peer-to-peer. There is no CoSpace server that sees your code or traffic.
No. A guest installs one small tool, pairs once with a one-time code, and then uses plain ssh. Cursor and VS Code Remote-SSH work with the same space name.
Yes. A space is a shared team workspace, and the host can see everything inside it. Do not use a space for anything you would not share with the host.
Claude Code, Codex and Grok come preinstalled and ready, together with git, gh, curl and the usual build tools. Agents can install anything else with apt, npm or pip.
CoSpace is free and open source under the MIT license.
One command on your machine, one invite link, and your team is coding with agents in the same place.