Cymose is an AI chat that branches. Fork any message into its own thread, explore several answers at once, and promote the one that held up back into the parent — so every branch you open afterwards already knows. Start at cymose.dev. The terminal, VS Code and Obsidian clients are open source and run on your own API key, with no account. A conversation with a model is one line, and thinking is not. We think the useful shape for working with AI is a graph you own: where branches stay visible in