[BUG] Agents feature repeatedly spawns new PowerShell processes

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 I create several agents using the newly added claude agents command, new PowerShell instances are continuously launched in the background to query process creation times. Along with the related WMI process and the antivirus application trying to scan all of this activity, the computer becomes unusable.

Example query:
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -Command "(Get-CimInstance Win32_Process -Filter \"ProcessId=55584\").CreationDate.Ticks"

<img width="784" height="823" alt="Image" src="https://github.com/user-attachments/assets/7e6d813e-67c9-4a1a-9483-e011ab802b6e" />

What Should Happen?

Instead of running each query through a newly launched application, an alternative and more reasonable approach needs to be found...

Error Messages/Logs

Steps to Reproduce

• Use the newly added "claude agents" command on a Windows machine.
• Create or start multiple agents.
• Observe the background processes using Task Manager, Process Explorer, or a similar tool.
• Notice that new powershell.exe processes are repeatedly launched to query process creation times.
• Observe that these PowerShell processes trigger WMI activity and antivirus scanning.

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.139

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_