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Subshell runs your interactive coding agents in tmux panes on machines you own: launch, watch, and steer them from any device.
Subshell is a web application for creating, viewing, and managing interactive agent subshells: real CLI coding agents (Claude Code, OpenCode, Codex, Hermes, pi) running in tmux-backed terminal panes on machines you own. Start an agent from the browser and walk away: the next device you open (laptop, tablet, phone) shows the same live pane you can type into, and a push reaches you when a decision is needed. The panes survive your laptop closing, no one else's cloud sits between you and your agents, and the server is one binary you host yourself.
Start here
| If you want to… | Go to |
|---|---|
| install and run your first subshell (headless, desktop app, or Docker) | Get Started |
| see which agent CLIs Subshell can drive and how each plugs in | Agents |
| run agents on more than one machine | Nodes |
| understand what the trusted-network posture defends, and what it does not | Security Model |
Three words first
Subshell uses three words with exactly one meaning each, and all of these docs follow them:
- A server is a control plane: the API, its database, and the web UI it serves. It is not a machine that runs agents.
- A node is a machine that runs agents: any host enrolled to execute panes on the control plane's behalf.
- A client is a person's interface to a control plane: the web UI, the desktop app, the mobile app.
One machine can be all three at once (it's normal for the server host to run its own agents), and the docs say so every time. What is Subshell explains the concepts; the Quickstart is one page.
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