[BUG] Multithread Read defect

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?

Cant read a batch of documents on high system load.

What Should Happen?

When having full CPU load and therefore long response times on compiling gcc, choosing an option on actions and reading documents should just work fine and showing the choice and logging it in should be a priority task to the shell.

Error Messages/Logs

No errors, just endless waiting for a 200 line file to be read (60 minutes plus). Large lag on choosing an action option yes/yes in this session/correcting.

Steps to Reproduce

1. Compile gcc
2. Load the context to maximum so that you only have 5% left in parallel.
3. Try to load above 5 file (up to 10) to load for the session summary and finish the session.
4. One file will hang there for the read and stop reacting.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

v2.0.58

Claude Code Version

v2.0.59

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Terminal.app (macOS)

Additional Information

Please make it possible to kill reading in documents and other non background tasks, please also introduce auto feedback by using a claude /feedback command on obvious fails and the option to share the content of your session to reproduce. Claude can write auto tickets mid session if needed.