[BUG] With a custom plan name, claude automatically executes the plan after updating it

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 the plan has a custom name, and is in a plans folder specified in the project config, then to make changes to it Claude asks to exit plan mode. It says "Can I exit plan mode to apply these changes to the plan" but as soon as it exits plan mode, it starts executing the plan.

What Should Happen?

It should edit the plan and stay in planning mode. It shouldn't need to exit planning mode in order to edit a folder in the settings specified plans folder, or a plan with a name which relates to the plan content instead of a random name.

Error Messages/Logs

Steps to Reproduce

• Set a plans folder in your claude settings
• Go into planning mode
• Discuss a plan
• Tell Claude to name the file appropriately instead of randomly (so it gets a specific name)
• Now tell Claude to change something in the plan

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.12

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_