[BUG] Claude silently deletes working code during edits without explicit notification

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?

Claude Code 2.0.76

Description:

• Claude removes existing, working functionality during code edits
• Does not explicitly state what is being deleted before making changes
• User discovers missing functionality only after the fact
• No clear audit trail of what was removed. Claude only mentions what WAS added/replaced
• Makes it impossible to trust code changes, especially in complex codebases
• User only discovered this because they remembered the original features
• When asked to fix the deleted features, Claude re-implements features differently (untested) - is unaware of the original code.

How can I trust Claude Code on complex projects, when a simple PHP/JS survey get messed up.

What Should Happen?

Claude code should not delete features from code base without explicit consent when making edits.

Error Messages/Logs

Steps to Reproduce

Claude created a basic 7 answer survey in PHP/JS with ajax autosave and submit calls.
Requested some changes to handle multiples of this survey on a page.
Claude highlights the additions/replacements made, but deletes entire sections of code - like question answered counter, and displaying red unanswered questions on submit.

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.76

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

_No response_