Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Core run the test suite and fix any failures"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
Work on the real project. Let ChatGPT read and edit files, run tests, keep terminals open and use your desktop. Follow the actual tool results as they arrive.
Give it a team. Split independent jobs across workers, then bring their results back. Workers keep their context, so the next task can pick up where they left off.
Stay in control of long tasks. Send a correction while work runs. Goal follows unfinished work; Loop keeps working within your brief. Compact & Resume carries the session and worker history into a fresh chat.
Install CoS and approve your project folder in Settings → Workspace.
Connect Core through Settings → Setup and add it in ChatGPT’s Developer mode. Tunnel setup →
Load the companion extension. Click Open extension folder, then Load unpacked in Chrome’s extension settings. Pairing is automatic.
Choose a model, write your task and send.
Windows 10/11, macOS 13 Ventura or newer, or a current desktop Linux. Chrome 116+ or current Edge, plus a ChatGPT account/workspace with Developer mode and custom MCP apps. Check account availability.
Unsigned beta: Windows is not publisher-signed; macOS is unsigned and unnotarized. Verify the package against the release checksums.
Linux: a Secret Service keyring is required. Prefer the DEB; when unprivileged user namespaces are disabled, the AppImage launcher can fall back to --no-sandbox.
Permissions: choose your approved folders and review capabilities before connecting. Fresh installs enable Core capabilities; Windows also enables Desktop permissions. Shell commands run with your normal user privileges. See the setup guide for current defaults.
After updating: reload the companion extension and refresh the CoS apps in ChatGPT when prompted.
This server cannot be deployed
Coding agents build full-stack apps in persistent workspaces and share them by link.
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