zag

Beta

A coding agent where the window system is the platform. Splits, focus, buffers, sessions, tools, hooks, and plugins are core primitives.

Bring your own model stack.

Full-screen TUI: A focused terminal interface with vim-style modal editing.
Per-pane sessions: Binary-tree window splits let each pane hold its own agent session.
Runtime model switching: Swap models mid-session without restarting or losing history.
Lua plugin system: Extend tools, hooks, keymaps, providers, and runtime behavior.