[Bug] Anthropic API Error: Overly Aggressive Content Filtering on Legitimate Cybersecurity Development Work

**Bug Description**
Why does Fable 5 keep displaying the message “Fable 5’s security measures have flagged this message”? We aren’t engaging in any illegal activities. We’re conducting business related to cybersecurity. We’re developing products. If this continues, we’ll have to stop using Claude it won’t be of any use to us.

**Environment Info**
- Platform: darwin
- Terminal: Apple_Terminal
- Version: 2.1.197
- Feedback ID: a27b4d0d-32e9-4d4a-9837-89290f0ed9f3

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

The report names no source file or test. Start by reproducing the filtering message on darwin with Apple_Terminal and version 2.1.197, then investigate feedback ID a27b4d0d-32e9-4d4a-9837-89290f0ed9f3. The issue does not define an acceptance criterion, so confirm the expected behavior before changing code.

索引モデルが issue の本文から書いたものです。