[BUG] Persistent false-positive AUP violation blocks entire AI research project (Opus 4.7)

Preflight Checklist

• [ ] 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?

Claude Code repeatedly triggers "Usage Policy violation" on my legitimate
AI research project. Every session is blocked because the classifier flags
the project's source code and documentation files that are auto-loaded into context.

The issue persists across new sessions, /clear, and rephrasing prompts.
The project is completely unusable with Claude Code.

Already reported to usersafety@anthropic.com with all request IDs.

What Should Happen?

Claude Code should be able to read and edit legitimate AI research project files
without triggering the AUP classifier.

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 IDs:
req_011CbJid1v9XXb4KKRYHJw1c
req_011CbJiEVRUZZ3yG7UbtAKmr
req_011CbJj9abzyG5u5usipWxf9
req_011CbJbo2bAZbFqxtcQDWpM
req_011CbJnwz6kcjsh28qjTMxLF
req_011CbJoN5qTQtp9r8ExJYuK7
req_011CbJnP3A959wT1Yj3BKAz6
req_011CbJn4HXoMGUujwJFRMvRH
req_011CbJkTAT4HX39eUkMUCtdr

Steps to Reproduce

1. Open Claude Code in a project directory containing AI research code and documentation
2. Send any prompt
3. Classifier triggers on project file content loaded into context
4. New sessions fail with the same error because the same project files are auto-loaded

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.149

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

This appears to be part of a widespread Opus 4.7 classifier regression.
Multiple similar issues reported today