Did not follow directions

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

I asked it to sync data from an excel file into a certain NetSuite sub tab and entities. It synced the data to an entirely different sub tab. Creating a major data calamity. I had to work 40 extra hours to get the previous data.

What Claude Actually Did

Simple, Claude synced the data to the wrong sub tab in NetSuite. See

<img width="2326" height="824" alt="Image" src="https://github.com/user-attachments/assets/5dd34477-5c67-45e3-8a74-98e8eb03f3da" />

Expected Behavior

paste into correct tab

Files Affected

Permission Mode

Accept Edits was OFF (manual approval required)

Can You Reproduce This?

Haven't tried to reproduce

Steps to Reproduce

_No response_

Claude Model

Opus

Relevant Conversation

Impact

Critical - Data loss or corrupted project

Claude Code Version

2.1.85

Platform

Anthropic API

Additional Context

_No response_