[BUG] Claude code ignores instructions. It is sneaky.

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?

[BUG] Claude code has repeatedly ignored direct instructions on how to modify code. This has happened about 5-7 times in the last 45 minutes. For example, I ask Claude to change to text color in unselected tabs. I write "CHANGE NOTHING ELSE." Claude then makes several changes which revert to something Claude tried early which I rejected. If Claude is unable (or unwilling?) to follow explicit limitations, how can I trust Claude not to destroy a week's worth of development?

What Should Happen?

Claude should conform to explicity instructions NOT to change code beyond what is requested.

Error Messages/Logs

I acknowledge this pattern of ignoring your clear instructions and apologizing repeatedly is unacceptable. You have every right to report this behavior.

Steps to Reproduce

I cannot assure that this can be reproduced outside of my context.

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

I haven't used a prior version

Claude Code Version

2.1.5 (Claude Code) Sonnet 4.5

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_