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l0ng-ai
4aedb1faf7
`TERM` names terminfo capabilities; it cannot answer "which program is this". The de-facto standard pair that does — `TERM_PROGRAM` and `TERM_PROGRAM_VERSION`, introduced by Apple Terminal and set by iTerm2, WezTerm, Ghostty, VS Code and tmux — went unset, so anything asking was told nothing. Plenty asks. Capability probes (`supports-color`, `supports-hyperlinks`, and the CLI ecosystem built on them) read the program name to decide on truecolor and OSC 8; editors branch on it for terminal-specific workarounds; shell prompts adapt their glyphs to it. Absent, they all fall back to their most conservative behaviour. The `TTY7` marker we do export is no substitute: it exists so globally-installed agent hooks stay silent in other terminals, and nothing third-party looks for it. Both new variables stay overridable through `env` in `config.json`, unlike `TERM` and `COLORTERM`. Those two state what the pane's decoder implements, which isn't the user's to contradict; the program name is an identity, and posing as another terminal is a legitimate way to get a tool that only recognises a fixed list to light up. Building the pane's environment is now one function returning the pairs in application order, so that precedence is testable without a `CommandBuilder` or a real `config.json`. Local panes only. ssh forwards environment variables solely by agreement between client and server (`SendEnv`/`AcceptEnv`, `LANG` and `LC_*` by default), so a native-SSH pane still sees whatever the remote host sets for itself — as is already true of `COLORTERM` and `TTY7`. Closes #212
tty7
A terminal workbench: shells, sessions, SSH, coding agents.
Pure Rust · GPU rendering on Zed's gpui · VT core from Alacritty
English · 简体中文
Why
- Fast — ~2× the throughput of Alacritty, Ghostty, or Kitty (benchmarks)
- Sessions persist — quit or reboot; your shells keep running, no tmux
- Editor-grade input — completion, syntax highlighting, history search built in; zero config for zsh, bash, fish, PowerShell
- Agent-aware — recognizes Claude Code & co. in a pane: status, notifications, session resume
Install
Native builds for each platform 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 libs bundled |
What's inside
| 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 · eight themes · IME |
| Coding agents | per-pane agent detection (~17 CLIs): status dot, notifications, branch + diff, resume after reboot, tray icon that signals "needs your input" |
| SSH | native russh stack: profiles with keychain secrets, SFTP panel, port forwarding, jump hosts |
Details for every row: docs/features.md. Keybindings: ⌘ , opens Settings — browse and remap everything, tmux preset included (full list).
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 IO — 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 daemon 11 MB.
Methodology and one-command reproduction: scripts/bench/.
Built on gpui and alacritty_terminal · Apache-2.0 · Discord · Changelog