[BUG] False-positive Usage Policy block on benign field-mapping task (healthcare app)

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?

Summary:
Claude Code returns "unable to respond ... appears to violate our Usage
Policy" on a routine coding task. The task is correcting form fields that
aren't copying from an intake wizard into a downstream module. Reproduces
across edit/retry and in a fresh session.

Context that likely causes the false positive:
The project is an EMR/billing app for substance-use-disorder treatment.
The demo site uses entirely synthetic/fake data, but field names and
sample values (substance-use history, screening fields, patient-like
records) appear to pattern-match the classifier even though no real PHI
is involved and the task is pure field-to-field mapping logic.

Steps to reproduce:

1. Open a session with the wizard + module files loaded (synthetic demo data).
2. Ask Claude Code to fix fields not carrying over from wizard to module.
3. Request is blocked as a Usage Policy violation.

Expected: Claude Code assists with the mapping fix.
Actual: Request blocked; editing the message and starting a new session
do not resolve it.

Additional: In-app feedback submission (/bug) returns HTTP 403.

Request IDs:

• req_011Cbo4cHUge9Wb2tUno2mgd
• req_011Cbo8u44jKhHFBYrs1n1bf

What Should Happen?

There is no reason I should be getting flagged.

Error Messages/Logs

● API Error: Claude Code is unable to respond to this request, which appears to violate our Usage Policy (https://www.anthropic.com/legal/aup). Please double press esc to edit your last message or start a new session
  for Claude Code to assist with a different task.

  Request ID: req_011Cbo8w3z56QfdG6hR8TX88

Steps to Reproduce

Each time I start a brand-new session and start working on anything I keep getting this error message.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude Code v2.1.167

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

_No response_