[MODEL] Opus 4.5

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 made incorrect assumptions about my project

What You Asked Claude to Do

At morning, I asked claude to write me a script to replace duplicated material usage for my game, and it did it well, untill everything went wrong.

What Claude Actually Did

After a instructions and the "everythings looks correct" phase, all my materials were deleted, because of the bug in a claude script. well, in godot, if something is removed, they'll be removed permanently. In this case issue was not yet worst possible. I had some old backups in github, and asked claude to pull the missed material textures from there, it said it would do that, but instead, pulled ALL data from old backups, overwriting everything. This made all the changes instant and everything saved and lost 2 weeks of data. That's okay, i can rewrite everything and start over. but claude have been behaviouring weird all day long, giving a code that is completely opposite what i ask for. If I ask UP, it makes a code that goes down. Like 80% of the code that it provide today is complete garbage and opposite of what I asked for. Feels like im asking a student to fullfill my requests instead of ARTIFICIAL INTELLIGENCE.

Expected Behavior

Should've done all what I ask for.

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

2.0.76

Platform

Anthropic API

Additional Context

_No response_