[BUG] Claude breaks code on hitting session limit

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?

When CC sub-agent reaches the session limit, it dies, leaving solution in unbuildable state. It takes another session to just get through leftovers and figure out what damage was done. In some cases it leads to spiral of damage. Had to use Gemini to fix the mess.

What Should Happen?

Agent should have stopped, preserving full context, alternatively writing free breadcrumb with report on where it stopped.

Error Messages/Logs

None

Steps to Reproduce

Just give sub-agent large task

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.209

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

When I say "switch to extra usage", and it's enabled, it replies with URL where I can "turn it on", and discards context / simply exits, after an hour of editing the code base and leaving it in broken state.