[BUG] since a couple hours ago, the claude code agent often gets stuck while working. downgrading doesn't help.

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?

often when the agent is working on a prompt, in the middle of a step it'll get stuck.

<img width="330" height="24" alt="Image" src="https://github.com/user-attachments/assets/5635d498-7e4c-496a-b39f-496841e38c97" />

at this point, if i hit ESC, it won't even say "Interrupted" like it usually does. sending additional messages to the agent will then lead to something like this, but there's no way to move forward other than starting a new session:

<img width="312" height="69" alt="Image" src="https://github.com/user-attachments/assets/785e5927-a2c3-4a40-a3c2-4cd71233cf08" />

What Should Happen?

the agent shouldn't get stuck this way. or it should show an error.

Error Messages/Logs

Steps to Reproduce

run claude-code with a prompt that leads to the agent taking multiple actions. when running this, i had thinking turned on. i used --model opus with --dangerously-skip-permissions

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.61, also happens on 2.0.58

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

iTerm2

Additional Information

_No response_