Ctrl+Backspace indistinguishable from Backspace on Windows Terminal

[JosXa]

What happened?

Binding deleteWordBackward to ctrl+backspace in keybindings.json has no effect on Windows Terminal. Ctrl+Backspace deletes a single character, same as plain Backspace.

Windows Terminal sends distinct bytes for each:

• Backspace: 0x7f
• Ctrl+Backspace: 0x08

But both are treated as plain backspace in matchesKey() and parseKey(). So 0x08 is consumed as backspace before it can match ctrl+backspace.

Complication: 0x08 is also the ASCII code for Ctrl+H. The Emacs keybinding example uses ctrl+h for deleteCharBackward, which works because 0x08 is currently treated as backspace.

Steps to reproduce

1. Add to ~/.pi/agent/keybindings.json:

   { "deleteWordBackward": ["ctrl+w", "alt+backspace", "ctrl+backspace"] }

2. Open pi in Windows Terminal
3. Type hello world
4. Press Ctrl+Backspace
5. Only d is deleted, not world

Verified with a raw stdin keyspy:

bytes: 0x7f  length: 1   # Backspace
bytes: 0x08  length: 1   # Ctrl+Backspace

Expected behavior

Ctrl+Backspace should be bindable as a distinct key from Backspace on terminals where they produce different bytes.

Version

0.55.3