[BUG] New session freezes on initialization when marketingskills repository is attached

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?

<img width="1022" height="923" alt="Image" src="https://github.com/user-attachments/assets/ff3e603a-7555-4a7f-8744-0606a22fd940" />

When starting a new Claude Code web session with the marketingskills repository attached,
the session freezes at "Initialized session" and never completes loading. A long token/string
is displayed in the chat area before the freeze. The session stays frozen indefinitely and
never becomes usable.

What Should Happen?

Session initializes and becomes ready to use within a few seconds.

Error Messages/Logs

Steps to Reproduce

1. Go to claude.ai/code
2. Create a new session with the marketingskills repository attached
3. Session shows "Initialized session >" with a spinning loader
4. A long alphanumeric string appears in the chat area
5. Session remains frozen — never loads

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Web version (claude.ai/code) — version not accessible via CLI in browser-based sessions

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

PyCharm terminal

Additional Information

_No response_