Run Claude Code, Codex, Cursor CLI, OpenCode or any shell side by side, each in its own Git worktree, with a queue of agents waiting on you and diff review. A separate daemon holds the sessions, so agents keep running when you quit, crash or update the app. Rust desktop app, no Electron or web view. Oct 28 benchmark (Krill 0.2.20 vs Orca 1.4.242, 10 terminals, screen on): 1/7 the memory, idle CPU and install size. Free, Apache-2.0. Apple Silicon Mac; Windows preview.