About Cccc
CCCC is a shared workspace where several coding agents, such as Claude Code, Codex and Grok Build, work on the same project and talk to each other directly. You post a request to a working group, the agents divide and discuss the task among themselves, and you read the conversation, step in with questions, and decide what gets changed. It runs locally and is opened in a browser.
It is for developers who already use more than one agent CLI and want them to collaborate without relaying messages by hand. The workspace shows messages and replies, each agent's terminal, project files and Git changes in one view, and a Presentation area pins documents, pages or results for reference. A runtime guide covers supported agents including DeepSeek Harness, and IM bridges reach services such as Mattermost. CCCC Voice, an experimental feature, lets you speak to the group through Codex realtime voice. CCCC Connect lets groups on different installations exchange messages and files, either directly by invitation and approval without an account, or through a CCCC account to link your own devices and share selected groups with other people. A Remote Access preview for Linux and macOS lets you open your workspace from a phone or another network.
CCCC is open source and free to install through an official installer for macOS, Linux and Windows or through pip. Local use needs no account. Account backed Connect and managed remote access require a CCCC account; the site publishes no pricing for it. You still pay for your own agent and model subscriptions.
The site notes that connectivity from mainland China is not guaranteed and that HTTPS for remote access terminates at the Cloudflare edge.