[MODEL] opus 4.8

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 typed a completely benign prompt in a new Claude Code session:

hi

I also tried starting a new session/conversation and using Claude Code Desktop and the CLI. The same error appeared even before asking Claude to do any coding task.

What Claude Actually Did

Claude Code started a new session.
I entered a harmless prompt: hi.
Instead of responding normally, Claude Code immediately returned an API error.
The error claimed the request appeared to violate the Usage Policy.
The error specifically said it triggered “cyber-related safeguards.”
This happened even though the prompt did not contain any cyber/security content.
Re-authenticating did not fix the issue.
The Claude website still works on the same account, so the issue appears specific to Claude Code / Opus routing.

Error shown:

API Error: Claude Code is unable to respond to this request, which appears to violate our Usage Policy.
This request triggered cyber-related safeguards.

Expected Behavior

Claude Code should have responded normally to a harmless greeting.

Expected response could be something simple like:

Hi! How can I help?

Claude Code should not trigger cyber-related safeguards for a basic greeting in a new session.

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

claude code

Platform

Anthropic API

Additional Context

_No response_