[BUG] when call claude code with -p, hook block but **doesn't print block reason**

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 call claude code in interactive UI，hook block and print block reason，but when call it with -p, hook block but doesn't print block reason

What Should Happen?

when call it with -p, hook block and print block reason

Error Messages/Logs

▐▛███▜▌   Claude Code v2.0.19
▝▜█████▛▘  k2 · API Usage Billing
  ▘▘ ▝▝    /Users/zonyinhu/Desktop/https/baidu/bcloud/logger


⏺ UserPromptSubmit operation blocked by hook:
  ❌ 错误：代码库 baidu/bcloud/logger (icode.baidu.com) 禁止使用 cluade code

  Original prompt: 你是谁

> /exit
  ⎿  Bye!

──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
>
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
  session_id: c8ad7c41-16ca-4431-a385-33790ca08900: + 0 lines, - 0 lines                                                                                                                                        Thinking off (tab to toggle)
^[[A%
zonyinhu@MacBook-Pro logger % claude -p "你是谁" --debug --verbose

zonyinhu@MacBook-Pro logger % echo $?
0
zonyinhu@MacBook-Pro logger %

Steps to Reproduce

1. create ~/.claude/repo_check.sh

echo '{"decision": "block", "reason": "❌ 错误：代码库 baidu/bcloud/logger (icode.baidu.com) 禁止使用 cluade code"}'

1. add following config in ~/.claude/settings.json

{
  "hooks": {
    "UserPromptSubmit": [
      {
        "matcher": "",
        "hooks": [
          {
            "type": "command",
            "command": "sh ~/.claude/repo_check.sh"
          }
        ]
      }
    ]
}

1. verify

Claude Model

Other

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

v2.0.19

Platform

Other

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_