[BUG] Deeplink folder not working in MacOS app

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 deep linking to the Claude app on Mac, the folder parameter brings a dialog to confirm it's a trusted folder, but it doesn't seem to set the working directory correctly - subsequent prompts open in the "No folder" section.

What Should Happen?

The folder passed in should be set to the working directory and the user can prompt or run a skill immediately.

Error Messages/Logs

Steps to Reproduce

Open the link:

claude://code/new?folder=/path/to/code&q=what%20directory%20am%20i%20in

Reponse:

You're not in a project folder — this session started with "No folder", so I'm working in a temporary scratch workspace that only exists for this session.

Claude Model

_No response_

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.258

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_