[BUG] Threads auto-archive mid-session without user action

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?

Active Claude Code threads are being auto-archived mid-session. I'm still working in the thread when it silently flips to archived and disappears from the active list. Similar to #57586 and #13677 but happens during an active session, not after navigating away.

What Should Happen?

Threads should only be archived when I explicitly archive them. Active sessions should stay active.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Code and start a session
2. Send prompts and work in the thread normally
3. Thread auto-archives mid-session with no action taken

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.7196.0 (2dbd78) 2026-05-12T05:34:40.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

Disrupts workflow and loses session context. Happens repeatedly across sessions. I do not need archiving for my workflow ever.