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Found by driving a dev instance with the CLI rather than by reading, which is the only way any of these would have surfaced. `ws attach` is documented as "become its controlling client", and the CLI cannot be one: the claim belongs to the connection that made it and the connection ends when the command does, so `tty7 ls` reads unattached again the moment it returns. Its real and only lasting effect is displacing whoever held it — which is exactly what the human output says (`took over from HOST`) and what the docs never did. `ATTACHED` said it names "a GUI window, or another client". A GUI only claims a workspace it is showing as a *remote* one; a window on a workspace of its own machine claims nothing, because there is no second client to arbitrate against. So with a window sitting on it `tty7 ls` prints `-`, and the column read as "nothing has this open" when it means "no remote client holds this". `tab move @TAB INDEX` never said which end `INDEX` counts from. It is 0-based — beside an `@N` address that is 1-based, on the same command line — so `tab move @1 2` moves the first tab to the third slot. Verified against a running server: `@1 0` leaves it, `@1 1` puts it second, past the end clamps to last the way `split --ratio` already documents. `to` in the JSON echoes the number you asked for rather than where the tab landed, which is worth saying since the clamp makes those differ. Also records why `WorkspaceDetach` throws away the one thing it computes: the reply has always been `Unit`, and the dialect is spoken to whatever build was pushed to a remote machine, so widening it to `Bool` would break every server already out there. 2932 tests pass.
tty7
A terminal workbench: persistent sessions, remote work, agents.
Pure Rust · GPU rendering on Zed's gpui · VT core from Alacritty
English · 简体中文
Why
- Performance — ~2× the throughput of Alacritty, Ghostty, or Kitty (benchmarks)
- Persistent sessions — quit or reboot; your shells and supported agent sessions keep running, no tmux
- Editor-grade input — suggestions, completion, highlighting, history search
- Remote development — files, repos, panes, and git data stay on the remote machine
- Native SSH — profiles, SFTP, port forwarding, and jump hosts
- Agent-aware — Claude Code, Codex & co.: status, notifications, git context
- CLI + Skills — agents create panes, run commands, and inspect output
Install
Native builds for macOS, Windows, and Linux on Releases:
| macOS | …-macos-arm64.dmg · …-x86_64.dmg |
drag into Applications |
| Windows | …-setup.exe · portable ….zip |
|
| Linux | …-x86_64.AppImage |
chmod +x and run — X11/Wayland libraries bundled |
What's inside
| Editor-grade input | ghost suggestions from history · explained tab completion · syntax highlighting · multi-line editing · click places the caret · ⌃ R fuzzy history |
| Window | tabs & splits · ⌘ P palette · ⌘ F scrollback search · nine themes · IME |
| Agent-aware | per-pane detection (18 CLIs): status dot · notifications · branch + diff · resume after reboot · tray icon when input is needed |
| Remote workspaces | remote files, repos, changes, diffs, worktrees, tabs, and panes · reconnect from any client and continue where you left off |
| CLI + Skills | bundled tty7 CLI · agent skill · pane/workspace control · real PTY commands · output, process, port, and agent status |
| SSH | native russh stack: profiles with keychain secrets · SFTP panel · port forwarding · jump hosts · one-time, unprivileged tty7-server install |
Full documentation lives in docs/ —
keyboard shortcuts ·
config.json ·
CLI reference. The agent-facing CLI interface is also
documented in skills/tty7/SKILL.md.
Install the skill with:
npx skills add l0ng-ai/tty7 # install
npx skills update tty7 # update later
Benchmarks
Same machine, same day, same 155×40 grid — Apple M1 Pro, macOS 26.3.1, five-run averages (2026-07-04):
| tty7 | Alacritty | Ghostty | Kitty | |
|---|---|---|---|---|
Plaintext I/O — 11 MB cat (lower = better) |
95 ms | 239 ms | 179 ms | 185 ms |
| DOOM-fire frame rate (higher = better) | 888 fps | 485 fps | 552 fps | 617 fps |
| Cold-launch memory | 116 MB¹ | 105 MB | 128 MB | 130 MB |
¹ GUI 105 MB + the persistent server 11 MB.
Methodology and one-command reproduction: scripts/bench/.
Built on gpui and alacritty_terminal · Apache-2.0 · Discord · Changelog