[BUG] /install-github-app command hangs when using SSH config with custom GitHub hosts

Claude CLI Bug Report

Environment

• Platform (select one):
• [X] Anthropic API
• Claude CLI version: v1.0.44
• Operating System: MacOS 15.5
• Terminal: PyCharm / WebStorm Integrated Environment

Bug Description

I am handling multiple GitHub access using ~/.ssh/config, and having suffix user to support different SSH connection such as git@github.com-identifier:workspace/repo.git

When I run /install-github-app, it will stuck at "Enter a different repository", nothing happen when I enter and press enter. It works fully when I manually change my git remote to git@github.com:workspace/repo.git

I confirm I have login gh auth login with my specified account, but no luck.

SSH Config:

Host github.com-identifier
   HostName github.com
   User git
   IdentityFile ~/.ssh/identifier

Steps to Reproduce

1. Set up SSH config with custom host identifier (e.g., github.com-identifier)
2. Configure git remote to use the custom host: git@github.com-identifier:workspace/repo.git
3. Authenticate with GitHub CLI using gh auth login
4. Run Claude CLI command /install-github-app
5. When prompted to "Enter a different repository", input the repository name
6. Press Enter - nothing happens, command hangs

Expected Behavior

• Claude CLI should properly parse and handle SSH remotes with custom host identifiers
• The /install-github-app command should proceed normally after entering the repository name
• The installation should work with the existing SSH configuration without requiring manual remote URL changes

Actual Behavior

• The command hangs after entering a repository name at the "Enter a different repository" prompt
• No error messages are displayed
• The only workaround is to manually change the git remote from git@github.com-identifier:workspace/repo.git to git@github.com:workspace/repo.git

Additional Context

• This issue appears to be related to how Claude CLI parses SSH remote URLs with custom host identifiers
• The GitHub CLI (gh) authentication works correctly with the same setup
• The SSH configuration is valid and works for normal git operations
• This is a common setup for developers managing multiple GitHub accounts or organizations

Workaround:
Temporarily change git remote before running Claude CLI commands:

git remote set-url origin git@github.com:workspace/repo.git
# Run Claude CLI commands
git remote set-url origin git@github.com-identifier:workspace/repo.git

Potential Fix:
Claude CLI should parse SSH remote URLs more robustly to handle custom host identifiers in SSH config, similar to how standard git operations handle them.