[BUG] Loss of critical context leading to unsolicited changes and broken working code.

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?

1. Simple task: Migrate only the Fyne UI to Wails, keeping the backend intact.
2. Problem: Context summary deletes critical technical information from the original code.
3. Result: Functional code is rewritten, features are broken, and there is widespread regression.
4. Impact: Loss of time, money, and project progress.
5. Frequency: This has happened twice in the same project.

What Should Happen?

The expected result should be that everything migrates correctly and that when it compacts the context, it takes into account the key points that were told, such as not touching the backend.

Error Messages/Logs

Steps to Reproduce

There isnt code to reproduce is malfunction

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

v2.0.42

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_