[BUG] alse positive content filter on standard React form component

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?

• Reading CustomerManagement.tsx (standard TypeScript form with phone/email fields) triggers "Output blocked by content filtering policy"
• file contains no actual PII, just form field definitions

What Should Happen?

Claude should update a State text field to a dropdown with all 50 us states listed in alphabetical order

Error Messages/Logs

> On the customer management form, change the State field to a dropdown with all 50 us states listed in alphabetical

● I'll find the customer management form and update the State field to be a dropdown with all 50 US states.

● Search(pattern: "**/Customers/**/*.tsx")
  ⎿  Found 1 file (ctrl+o to expand)

● Read(frontend\src\pages\Customers\CustomerManagement.tsx)
  ⎿  Read 707 lines

● I found the State field on line 418-424. I'll change it from a text input to a dropdown with all 50 US states in alphabetical order.
  ⎿  API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"Output blocked by content filtering policy"},"request_id":null}

Steps to Reproduce

Not known at this time

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

v2.0.60

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_