[BUG] Claude fails silently in VSCode with hook failures

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 CC in vscode, I interrupted a change to the hook scripts. This caused them to silently fail - claude did not respond to the commands any more AT ALL.

Running Claude CLI showed this, letting me find and fix the problem:

UserPromptSubmit operation blocked by hook:                                                                                                              
  [./50_process/logging/log_user_prompt.sh]: ./50_process/logging/log_user_prompt.sh: line 77: syntax error near unexpected token `<<<'                    
  ./50_process/logging/log_user_prompt.sh: line 77: `<<<<<<< HEAD'   

What Should Happen?

Claude should report the error it receives

Error Messages/Logs

Steps to Reproduce

• Create a UserPromptSubmit hook, that calls a script.
• Introduce a failing error in the script so the script fails to run.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.22

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_