[BUG] Duplicating Slash Commands When Typing

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?

When I use Claude Code and try to invoke a slash command the more I type (or even backspace) duplicate entries will spawn in and push my text entry up so I can't see what I'm typing anymore. Backspacing until the slash is gone will fix the layout though.

Prompt Still On Screen

<img width="1912" height="2098" alt="Image" src="https://github.com/user-attachments/assets/7a1fe65c-3529-4acb-9d8e-828086fc77c9" />

Prompt Off-Screen after a few backspaces and typing again

<img width="1912" height="2104" alt="Image" src="https://github.com/user-attachments/assets/6676f049-5e9f-4a41-86c8-2ffbbca2f18a" />

What Should Happen?

Slash commands should filter out as expected when typing without pushing my text off the screen

Error Messages/Logs

Steps to Reproduce

1. Start a claude code session anywhere
2. Start typing the name of a slash command (the more you type the more the list grows with duplicates and backspaces will contribute to the problem as well)

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Before Opus 4.7 (I don't remember which version I was on. 😔 )

Claude Code Version

2.1.149 (Claude Code)

Platform

AWS Bedrock

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_