[Bug] API Error: Safeguards false positive flags coding task as `[cyber]`

**Bug Description**
● API Error: Fable 5.1's safeguards flagged this message (https://www.anthropic.com/legal/aup). Our intentionally broad safeguards allow us to deliver more capabilities faster, but can sometimes flag
legitimate coding, cybersecurity, and biology tasks. Claude Code can't respond to this message with Fable 5.1.

Double press esc to edit your last message, or try a different model with /model.

Send feedback with /feedback or learn more: https://support.claude.com/en/articles/15363606

Details: `[cyber]`

Request ID: req_011Cf4ytaibszyfpNGjBYaZW

**Environment Info**
- Platform: win32
- Terminal: windows-terminal
- Version: 2.1.272
- Feedback ID: ab7386b0-92e6-4a64-98e2-c3c26a760834

**Errors**
```json
[]
```

No source file, test, or entry point is identified in the report. First reproduce the request on win32 in Windows Terminal with Claude Code 2.1.272, then trace where the Fable 5.1 safeguard response and `[cyber]` detail are surfaced; done means the legitimate coding task is no longer incorrectly blocked or the failure is clearly identified as external.

Written by the indexing model from the issue text.