[BUG] Conversation not found

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?

To begin with, I used Sonnet 4 and saw the problem "Conversation not found" then I started using Opus 4.1 and now I have another problem... with limits.

<img width="417" height="149" alt="Image" src="https://github.com/user-attachments/assets/99f75c01-02d0-42ca-9d0a-afff495985b5" />

<img width="1131" height="672" alt="Image" src="https://github.com/user-attachments/assets/0c45198f-31a5-444d-9e55-bacb8d53d01a" />

What Should Happen?

resumption of work Claude

Error Messages/Logs

Steps to Reproduce

I just wrote in the Claude chat and it stopped working

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Sonnet 4

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_