[BUG]b"Usage limit reached" triggered after weekly usage jumped from ~35% to blocked in ~12 minutes

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?

Claude Code blocked all input with "Usage limit reached" while my weekly usage
was at roughly 35%. The drop from ~35% to fully blocked happened within about
12 minutes of normal use — no unusually large task, no bulk operation, no long
resumed session.

The displayed usage and the actual enforcement disagree. claude.ai web works
normally on the same account at the same time, which points at Claude Code's
internal limit tracking rather than the account itself.

This matches the pattern in #61828, #54177, and #50321.

What Should Happen?

Prompts should be accepted normally, since neither the 5-hour window nor the
weekly quota was anywhere near its ceiling. If a limit genuinely was reached,
the usage panel should reflect that — the two should never disagree.

Error Messages/Logs

Usage limit reached
You've reached your usage limit. Try again after your limit resets.

Steps to Reproduce

1. Confirm usage at claude.ai/settings/usage — weekly (all models) at ~35%,

5-hour session well under the ceiling

1. Use Claude Code normally for roughly 12 minutes (standard editing/read tasks,

fresh session, no bulk operations)

1. Input becomes fully blocked with "Usage limit reached"
2. Re-check claude.ai/settings/usage — it still does not show either meter

exhausted

Not tied to a specific repo or file; this is account-level rate-limit accounting,
so a minimal code example isn't applicable.

Claude Model

Other

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.169 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

claude.ai web interface works normally on the same account at the same time

• Plan: Max 5x