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Folding three signed-off values into one `SELECTED` target is what made the chrome shout. The old ladder had `hover` 0.09, `sidebar_sel` 0.12 and `list_active` 0.17; the ratio rewrite kept only the loudest of them and pointed every selected fill in the app at it. On the Light theme the rail's selected row went from #E2E2E2 to #C0C0C0 — a silver slab at twice the perceived step it had ever had — and it took the switch tracks, the input grounds, the plain buttons' active state and every chrome tile's *hover* (which paints the sidebar's selected grey by design) with it. The two jobs were never the same: - A resting selection — a rail row, a lit toggle, a switch track — sits there all session next to unselected siblings. It stays quiet and leans on the text channel, which is what `Surface` carries both for. - A cursor — the one menu row under the pointer, the palette's keyboard row — is transient and alone on its surface, and the eye is already tracking it. It gets the loud rung. So `SELECTED` drops to 1.30:1 and a new `CURSOR` takes 1.70:1, each anchored to the Dracula value it was signed off at (`mix(bg, fg, 0.12)` and `0.17` respectively). Dracula lands within 1.02:1 of both old greys, and every other theme is pulled onto the same two perceived steps instead of the same one. `PRESSED` follows `SELECTED` down to 1.55:1 — it is "one step past selected", not a fixed distance from the surface. Only `accent` (gpui-component's name for a menu row highlight) and `list_active` move to the new rung; everything else was already asking for a resting selection and now gets one. The per-surface ladder test drops its floors to match and gains a cursor-vs-selected assertion, so the two rungs can't quietly re-merge.
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