[BUG] Brainstorming Companion Not Stable - Useless

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 using the brainstorming superpower, it attempts to show mockups/visual previews of what it wants to ask about. However, the server for this is HIGHLY unstable. At least half the time, the server fails to load at all. The other half of the time, it loads for a single presentation, and then shuts down as soon as Claude moves to present the next question. When you tell Claude that the presentation server has closed, it then starts a new one on a new localhost address.

What Should Happen?

The companion should serve on a stable connection that stays open for the duration of the brainstorming task and updates using HMR or similar as Claude asks new questions.

Error Messages/Logs

No error messages other than "page not found" from the server no longer being active.

Steps to Reproduce

1. Start a brainstorming session with Claude
2. When prompted, accept the browser companion mode
3. Note that the companion mode has to continually restart for all questions

Claude Model

Not sure / Multiple models

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.75

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_