ExitPlanMode should restore the permission mode that was active before EnterPlanMode

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 entering plan mode, the previous permission mode (e.g., auto, bypassPermissions) is replaced. After exiting plan mode, the mode doesn't revert — the user has to manually reset it.

What Should Happen?

ExitPlanMode should restore whatever mode was active before EnterPlanMode was called.

Error Messages/Logs

Steps to Reproduce

1. Go into plan mode
2. Exit plan mode
3. Permission goes to Edit Automatically vs original mode.

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.107

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_