[BUG] Failed Installation has no cleanup logic

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 installing Claude Code, an unexpected system crash happened, and the installation failed in the middle. Now, whenever I try to install it again, it fails like this

curl -fsSL https://claude.ai/install.sh | bash
Setting up Claude Code...

✘ Installation failed

Could not install - another process is currently installing Claude. Please try 
again in a moment.


Try running with --force to override checks

✅ Installation complete!

The bug: --force mentioned in the above bash block is not supported and doesn't perform any cleanup in the installation bash script - I can't run --force with the curl command.

I tried to manually remove' ~/.claude' using rm -rf ~/.claude and then attempted to install it again using the above command, but it shows the same error. I also restarted my system, and the problem persists.

What Should Happen?

A successful Claude Code installation

Steps to Reproduce

run curl -fsSL https://claude.ai/install.sh | bash
Break it in the middle using a system crash-out - attempt to install it again

Claude Model

None

Is this a regression?

I don't know

Claude Code Version

latest

Operating System

Ubuntu/Debian Linux

Terminal/Shell

default Ubuntu terminal