[BUG] Notification hooks not firing for permission_prompt in VS Code extension

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?

The Notification hook does not fire in the VSCode extension version of Claude Code.

Actual Behavior

• Permission dialog is displayed as expected
• However, the Notification hook does not fire
• No log file is created by the hook command
• PreToolUse and Stop hooks work correctly

What Should Happen?

Expected Behavior

According to the documentation (https://code.claude.com/docs/ja/hooks#notification), the Notification hook should fire in the following cases:

• When Claude Code requests permission to use a tool
• When the prompt input has been idle for at least 60 seconds

Error Messages/Logs

None

Steps to Reproduce

1. Configure a Notification hook in settings.json with a command that logs to a file
2. Reload VSCode window
3. Configure permissions.ask to require confirmation for specific tools (e.g., Bash)
4. Execute a tool that triggers the permission dialog

sample_settings.json

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.123

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

• When the permission dialog was displayed, the Notification hook did not execute
• The log file specified in the command was never created
• Other hooks (PreToolUse, Stop) work as expected
• Workaround: Using PreToolUse hook with matcher "Write|Edit|Bash|NotebookEdit" to achieve similar functionality
• Unclear if this issue exists in the CLI version
• This may be specific to the VSCode extension