[BUG] Auto mode classifier permanently unavailable for my account (days, not transient)

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?

## Problem

The auto mode safety classifier (claude-sonnet-4-6) has been consistently
unavailable for my account for several days. The error appears on every
Write/Edit operation in auto mode:

> claude-sonnet-4-6 is temporarily unavailable, so auto mode cannot determine
> the safety of Write right now.

## What I've tried

• claude logout && claude login (token refresh)
• Deleted ~/.claude.json (full local cache wipe)
• Verified OAuth token is valid (not expired)
• Verified Anthropic API is reachable (no network/proxy issues)
• No ANTHROPIC_BASE_URL or ANTHROPIC_AUTH_TOKEN set in environment
• Issue persists across multiple days and session restarts

## Environment

• OS: Windows 11 Pro (10.0.26200)
• Claude Code version: 2.1.183
• Auth: claude.ai OAuth (Pro subscription)

## Impact

Auto mode is completely unusable. Every write operation fails immediately.

What Should Happen?

Auto mode should work.

Error Messages/Logs

Error: claude-sonnet-4-6 is temporarily unavailable, so auto mode cannot determine the safety of Write right now.
     Wait briefly and then try this action again. If it keeps failing, continue with other tasks that don't require this
     action and come back to it later. Note: reading files, searching code, and other read-only operations do not
     require the classifier and can still be used.

Steps to Reproduce

any write atempt from claude code:
Write(.claude\classifier-test.txt)
⎿  Error: claude-sonnet-4-6 is temporarily unavailable, so auto mode cannot determine the safety of Write right now.
Wait briefly and then try this action again. If it keep....

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.183

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_