[BUG] claude.ai/install.sh got Cloudflare'd (403 due to Managed Challege)

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?

I cannot install Claude Code with the recommended installation script. Curling the URL directly result in me getting Cloudflare'd.

<img width="1461" height="579" alt="Image" src="https://github.com/user-attachments/assets/9f86e6af-ae51-4ec5-9036-1701e07c1608" />

What Should Happen?

Installation should work correctly. Why wrap an install script with a Managed Challenge?

Error Messages/Logs

Steps to Reproduce

Run curl -fsSL https://claude.ai/install.sh | bash to install Claude Code

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

-

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

My IP address is in range 43.164.0.0/18. Tencent Cloud, Thailand region.