Agent View: add a way to add a new project folder without relaunching Claude Code

What I'd like

An easy way to add a new project folder to the Agent View (the Ctrl-S "by Project folder" grouping) without having to leave Claude Code entirely.

Current behavior

In the Agent View, pressing Ctrl-S groups sessions by project folder. From there:

• Highlighting a folder and typing a task correctly starts a new session under that folder — this works well.
• But there is no way to add a folder that isn't already listed. To get a new folder into this view today, I have to either:

1. Quit Claude Code entirely, cd into the target folder, and relaunch Claude Code there, or
2. Start a session under some other folder it doesn't belong to, then change the working directory from within that session.

Both are clumsy workarounds for what should be a simple action.

Requested behavior

Add a first-class way to register/add a new folder directly from the Agent View — for example, a keybinding or action that prompts for a path (with tab-completion) and adds it to the project-folder list, so a new session can be started under it immediately. No relaunch, no working-directory gymnastics.

Why it matters

People routinely jump between multiple project folders in a single Claude Code run. The Agent View's by-folder grouping is the natural home for that, but it can only show folders you've already entered the hard way. A lightweight "add folder" affordance would make the view actually usable as a project switcher.