Opus 4.6 on Claude Code

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Claude modified files I didn't ask it to modify

What You Asked Claude to Do

Very simply the model has degraded that I will have to find alternatives.. it can't do basic work, and I'm expert prompter, user for last 6 months and deployed loads of projects but hell if I can tell an AI to do something 10 times. It's like it is trying to find ways to do it arse ways

What Claude Actually Did

It can't do anything

Expected Behavior

It needs to return to what it was last week

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

Yes, every time with the same prompt

Steps to Reproduce

_No response_

Claude Model

Sonnet

Relevant Conversation

Impact

Critical - Data loss or corrupted project

Claude Code Version

Opus 4.6

Platform

Anthropic API

Additional Context

_No response_