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wezterm-pi-helper

v1.0.0

Published

Fixes WezTerm keyboard issues on WSL2

Vulnerabilities

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Links

Git

Maintainers

manelvfmanelvf

Keywords

pi-extensionweztermwsl2

Readme

wezterm-pi-helper

Fixes WezTerm keyboard issues when running pi on WSL2.

Problem

WezTerm on WSL2 for Windows has a bug where Kitty keyboard protocol flag 4 ("report alternate keys") causes shifted keys (capitals, @, #, $, etc.) to not be sent at all. This makes typing very inpractical.

Solution

This extension monkey-patches pi's terminal handling to use Kitty protocol flag 3 instead of 7 when running in WezTerm, avoiding the buggy flag 4.

Installation

cd ~/.pi/agent/extensions
npm install wezterm-pi-helper

Or add to your ~/.pi/agent/extensions/package.json:

{
  "dependencies": {
    "wezterm-pi-helper": "^1.0.0"
  }
}

Then run npm install.

How it works

The extension detects WezTerm via the TERM_PROGRAM environment variable. When detected, it overrides ProcessTerminal.prototype.setupStdinBuffer to use Kitty keyboard protocol flags 1+2 (value 3) instead of 1+2+4 (value 7).

  • Flag 1: Disambiguate escape codes
  • Flag 2: Report event types (press/repeat/release)
  • Flag 4: Report alternate keys (causes the bug in WezTerm on WSL2)

Why tmux works without this patch

If you've noticed pi works fine in tmux on WezTerm, that's because tmux intercepts the Kitty protocol query and handles keyboard input itself, masking the buggy WezTerm behavior.

License

MIT