[BUG] Usage counter desync after switching between API key and subscription OAuth auth

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?

After switching from subscription OAuth to API key auth, then back to subscription OAuth, the usage counter became permanently desynced. Simple messages consume 1-3% of the session limit. Logging into Claude Code consumed 2% instantly. Issue persists across full uninstall/reinstall and wiping all local config files. Affects both Claude Code CLI and the Claude.ai mobile app.

What Should Happen?

Normal usage consumption — simple messages should use a fraction of a percent at most

Error Messages/Logs

No explicit error messages. Just abnormally fast usage drain visible in the session counter

Steps to Reproduce

1. Use Claude Code with subscription OAuth
2. Hit weekly limit, switch to API key auth to continue working
3. Weekly limit resets, switch back to subscription OAuth
4. Usage counter is now desynced — burns 1-3% per simple interaction​​​​​​​​​​​​​​​​

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.96

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

This appears to be an account-level server-side bug, not a local config issue, as it persists across devices and full reinstalls. Plan is Claude Pro