- What is Cydonia?
- A desktop app for running coding agents in a project directory. Each agent works in its own session, and what it produces is kept as articles, boards and tables written into the project, under .cydonia/.
- Which agents does it run?
- Any agent that speaks the Agent Client Protocol (ACP): Claude Code, Codex, Cursor, OpenCode, pi and the rest of the ACP registry, installed from Settings › Agents. A command already on your machine can be added by hand in settings.toml.
- Is it free and open source?
- Yes. Cydonia is MIT-licensed, its source is on GitHub, and it asks for no account.
- Where is my data kept?
- On your disk. A project’s articles, boards, tables and sessions are in .cydonia/ inside the project directory, which carries its own .gitignore. Settings are in ~/.config/cydonia/settings.toml. Nothing is synced to a server.
- Which platforms does it run on?
- macOS on Apple silicon, Linux x86_64, Linux aarch64, Windows x86_64. It can also be built from source with cargo install cydonia.
- Can several agents work at once?
- Yes. Each session runs independently, panes and tabs put several on screen, and a card or a whole column on a board can be sent to a session.
- How is it different from Conductor or the Claude Code app?
- It is MIT-licensed, runs on macOS, Linux and Windows, runs any ACP agent rather than a fixed few, and keeps what agents write as articles and boards in the project. Side-by-side tables are at https://cydonia.sh/compare/.
- How do agents read and write articles and boards?
- Through MCP. Cydonia serves a project’s articles and boards as MCP tools to the agents it runs, and the same server can be added to an agent running outside the app.