Ctrl+Backspace and Ctrl+Delete do not delete words in Codex CLI prompt editor

What version of Codex CLI is running?

codex-cli 0.128.0

What subscription do you have?

ChatGPT Pro

Which model were you using?

gpt-5.5

What platform is your computer?

Microsoft Windows NT 10.0.26100.0 x64

What terminal emulator and version are you using (if applicable)?

Windows Terminal with PowerShell

What issue are you seeing?

Ctrl+Backspace and Ctrl+Delete do not appear to work in the Codex CLI interactive prompt editor.

I often use Ctrl+Backspace and Ctrl+Delete to delete whole words while editing text. In Codex CLI, these keybindings do not delete the previous or next word, which makes editing longer prompts more cumbersome. I have to press Backspace repeatedly to delete a word.

What steps can reproduce the bug?

1. Open Codex CLI in an interactive terminal session on Windows.
2. Type a prompt with multiple words, for example: please explain this long prompt.
3. Move the cursor within the prompt or leave it at the end.
4. Press Ctrl+Backspace.
5. Press Ctrl+Delete.

Observed result: the prompt editor does not delete whole words with these keybindings.

What is the expected behavior?

Ctrl+Backspace should delete the word before the cursor.
Ctrl+Delete should delete the word after the cursor.

This would match common text editing behavior in Windows terminals, editors, and many CLI prompt experiences.

Additional information

This is a prompt editing ergonomics issue rather than a model/runtime issue. It affects interactive prompt composition in Codex CLI.