[BUG] Option+key special characters (¡ ¿ é ñ) broken in input since recent update — regression

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Option+key combinations that produce special characters (e.g. Option+1 → ¡, Option+Shift+/ → ¿, Option+e then vowel → é) no longer work in the Claude Code input field. These characters work correctly in every other
app (Terminal, TextEdit, browser) and in a separate terminal session running alongside Claude Code.

This is a regression — these combos worked last week. Current version: 2.1.138.

Related: #37332 (same class of bug, was closed, appears to have regressed).

To reproduce

1. Open Claude Code in terminal
2. In the input prompt, press Option+1
3. Expected: ¡ appears
4. Actual: nothing happens (keystroke swallowed)

Environment

• macOS 24.6.0 (Darwin)
• Shell: zsh
• Keyboard: Logitech MX Keys S (US layout)
• Claude Code 2.1.138
• Locale: en_US.UTF-8

Workaround
Copy-paste special characters from another source. Not a fix.

What Should Happen?

Press Opt+1 and get a single inverted exclamation mark: ¡

Error Messages/Logs

Steps to Reproduce

1. Open Claude Code in terminal
2. In the input prompt, press Option+1
3. Expected: ¡ appears
4. Actual: nothing happens (keystroke swallowed)

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

IDK. worked last week

Claude Code Version

2.1.138

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_