[BUG] claude-code completely un-usable with 4.5

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?

it doesnt work at all for reliable code generation

What Should Happen?

cant follow instructions, loses context after a single prompt, just a complete waste of time and tokens. gpt2 performed better than this.

Error Messages/Logs

Steps to Reproduce

try it out

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.1

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_