[BUG] `/t` toggle of thinking mode makes it not possible to specify `/tmp/`

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?

The newly added rainbow and input highlighting behavior is cool but the /t/ to toggle is not!

CC and other AI CLIs use /tmp/ extensively for writing files and it is common to need to refer to this folder path. There's no easy way to do it, and it is causing toggling.

There's no clear way to escape the character sequence.

Instead consider enabling Control-t to toggle thinking mode.

What Should Happen?

Do not block simple typing of the vital /tmp/ directory

Error Messages/Logs

Steps to Reproduce

To repro:

type ultrathink

Tell it to "write a plan for having steve martin perform at my next birthday party. Ultrathink."

Then add:

"Write your technical brief on this plan to /tmp/"

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.0.113

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_