A high-performance GPU-rendered terminal with a built-in multiplexer, read-only file viewer with diff review, and QuickJS extension system.
Forked from Zed. All editor, AI, and collaboration features removed. The retained core: GPUI rendering engine, terminal emulation (alacritty-based), workspace pane management, theme/settings infrastructure, and a slimmed read-only editor for file/diff viewing.
- GPU-rendered terminal — powered by GPUI
- Built-in multiplexer — tmux-class session management with detach/reattach
- Server-canonical architecture — mux_server owns PTY + terminal state; GUI client renders grid
- File viewer & diff review — read-only editor with syntax highlighting for CLI agent workflows
- Shadow snapshot engine — fine-grained filesystem versioning for undo/decline
- QuickJS extension system — all UI chrome implemented as extensions
- Remote sessions — SSH tunnel support with auto server installation
Z3rm source code is licensed under GPL-3.0-or-later (inherited from Zed) with Apache-2.0 components where marked. New z3rm crates are Apache-2.0.