Introduction Open Walnut is a self-hosted web app for running Claude Code sessions. Every session sits on a task, and the task board shows which sessions are running and which are waiting for you. When you type a new task, Walnut tries to fill in its project, priority and pinned tier while you are still typing. Since September 2026 those guesses can come from Jev, a decision-only model from TypeSafe AI, instead of a Claude model. On 53 of my own tasks with a known project, Jev picked th...