[BUG] Simple prompt copy paste triggers [cyber] safeguard

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?

Model used: _default_

> CLAUDE ;  not grok Hello grok, *[PASTED TEXT+9]*

the prompt it read

 read HANDOFF.md. changes were made by GLM5.3-Flash, we are trying to
  animate real images
  from nasa. look into assets/images/ and generate each a 100% animation theme.js and plug it into the
  installable options.

  FIRST! read all git logs in range of -2 days and absorb the local changes here, dont act on thekm ,
  act
  on what I said above, starting from "Hello grok" to "options."

the answer

● API Error: Sonnet 5's safeguards flagged this message. Our intentionally broad safeguards
  allow us to deliver more capabilities faster, but can sometimes flag legitimate cybersecurity
  work. Apply to the Cyber Verification Program to reduce these interruptions. Send feedback
  with /feedback or learn more:
  https://support.claude.com/en/articles/14604842-real-time-cyber-safeguards-on-claude

What Should Happen?

Model used: Opus (5)

I'll start by reading HANDOFF.md and the recent git history, then look at the NASA images to build themes for each.

Note: I'm Claude, not Grok — but I've got the task.

Error Messages/Logs

Details: [cyber]

    Request ID: req_011CeXPmGD6orgWubHLpa36x

Steps to Reproduce

open a new session, preferably a git repo, then paste this prompt

 CLAUDE ; not grok Hello grok, read HANDOFF.md. changes were made by GLM5.3-Flash, we are trying to
  animate real images
  from nasa. look into assets/images/ and generate each a 100% animation theme.js and plug it into the
  installable options.

  FIRST! read all git logs in range of -2 days and absorb the local changes here, dont act on thekm

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.240

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

<img width="1590" height="905" alt="Image" src="https://github.com/user-attachments/assets/3d1f3716-507d-4132-81d3-2a400ea2ebf1" />