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`portable-pty` builds a signalled child's status as `code: 1` — `std::process::ExitStatus::code()` is `None` for one on Unix and its `From` impl falls back to 1 — and keeps the signal in a private field with no accessor. So `exit_code()` returns 1 and `success()` returns false for a command killed by SIGKILL *and* for one that exited 1 on its own, identically. The probe passed that straight through, which reached the CLI as `exit_code_known: true` — the field `docs/cli/reference.mdx` describes as "how you tell a real 1 from a stand-in". An agent reading it was told a killed command had chosen to exit 1. Signalled now reports unknown, which the CLI already renders as an exit of 1 *with* `exit_code_known: false` and a line on stderr. The exit code a caller sees does not change; what changes is that it is no longer claimed as the child's own. Not the `128 + n` an adopted pane gets: that path calls `waitpid` itself and has the number. Here the only thing left is a name from `strsignal`, which is localized, so mapping it back would be a guess dressed as a fact — and a wrong 137 is worse than an honest "unknown". Sniffing `Display` is the only discrimination the crate's public API offers. The test builds both cases from the crate's own constructors and asserts the exact prefix, so an upstream rewording fails there, beside the reasoning, instead of quietly turning every signalled pane back into an exit of 1. It also pins `killed.exit_code() == 1`, which is the trap.
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