[BUG] No hook is working on Windows

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've tested out several combinations of hooks, but None of them works.

Tested .claude/settings.json files:

{
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Write|Edit",
        "hooks": [
          {
            "type": "command",
            "command": "echo 'bla bla bla'"
          }
        ]
      }
    ]
  }
}

{
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Write|Edit",
        "hooks": [
          {
            "type": "command",
            "command": "isort 'tool_input.file_path'"
          }
        ]
      }
    ]
  }
}

{
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Write|Edit",
        "hooks": [
          {
            "type": "command",
            "command": ".claude/hooks/formatter.py"
          }
        ]
      }
    ]
  }
}

Everytime I got error:
[error] [Window] [Extension Host] [DEBUG] Hook output does not start with {, treating as plain text

I am using VS Code plugin. Could you explain me what I am doing wrong?
I've tried downgrade Claude extension as suggested in other issues, but it doesn't work either.

What Should Happen?

Hooks should trigger

Error Messages/Logs

[error] [Window] [Extension Host] [DEBUG] Hook output does not start with {, treating as plain text

Steps to Reproduce

Described above

Claude Model

None

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.0.27

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_