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troubleshoot zellij alt-shift-p latency

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Noah Masur
2026-08-29 10:18:58 -06:00
parent 38ba019c3d
commit 68320577ae
2 changed files with 9 additions and 0 deletions
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docs/CHANGELOG.md
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# Changelog # Changelog
## 2026-08-29
- Fixed 1.5-second latency when pressing `Alt-Shift-P` to trigger `zellij-session` in Zellij 0.45.0 + Ghostty:
- **Root Cause**: Zellij 0.45.0 introduced `StdinAnsiParser` (`zellij-client/src/stdin_ansi_parser.rs`) using `termwiz::InputParser` to parse ANSI control strings (OSCs, CSIs, DCSs) arriving on stdin. When pressing `Alt-Shift-P` (Option-Shift-P) with `support_kitty_keyboard_protocol = false`, Ghostty sent `\x1bP` (`ESC` + uppercase `P`). In ECMA-48 / VT100 standards, `ESC P` is the 7-bit ASCII representation of `DCS` (Device Control String). `StdinAnsiParser` buffered `\x1bP` waiting for a DCS string payload and string terminator (`ST` / `\x1b\`), hitting a ~1.5-second escape timeout before flushing `\x1bP` as residue to the keyboard handler.
- **Fix**: Added `alt+shift+p=text:\x1b[112;4u` and `super+shift+p=text:\x1b[112;4u` in `ghostty.nix` to send the explicit CSI-u sequence for `Alt+Shift+p` (`'p'` with modifier 4 = `ALT | SHIFT`). `StdinAnsiParser` immediately recognizes `\x1b[112;4u` as non-DCS input and passes it straight to the keyboard handler with 0ms latency.
## 2026-08-26 ## 2026-08-26
- Fixed macOS shortcuts (`Cmd+T`, `Ctrl+Tab`, `Cmd+Shift+]`, `Cmd+Shift+[`, `Cmd+K`, `Cmd+Shift+E`) in Zellij + Ghostty after disabling the Kitty keyboard protocol: - Fixed macOS shortcuts (`Cmd+T`, `Ctrl+Tab`, `Cmd+Shift+]`, `Cmd+Shift+[`, `Cmd+K`, `Cmd+Shift+E`) in Zellij + Ghostty after disabling the Kitty keyboard protocol:
platforms/home-manager/modules/nmasur/presets/programs/ghostty.nix
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"ctrl+shift+tab=text:\\x1b{" "ctrl+shift+tab=text:\\x1b{"
"super+k=text:\\x1bK" "super+k=text:\\x1bK"
"super+shift+e=text:\\x1bE" "super+shift+e=text:\\x1bE"
# Send CSI-u sequence for Alt+Shift+P / Super+Shift+P to bypass Zellij 0.45's DCS (ESC P) parser timeout (~1.5s delay)
"alt+shift+p=text:\\x1b[112;4u"
"super+shift+p=text:\\x1b[112;4u"
]; ];
}; };
themes."gruvbox" = { themes."gruvbox" = {