[BUG] Team Agent Error: Sibling tool call errored

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 asked CLaude Code to review the implementation it made with Team agents I try to ask or prompt it to

"Please review your current implementation and use Team agent and critique it"

And then it shows this error. Though it seems to do something else to workaround for that

<img width="1432" height="406" alt="Image" src="https://github.com/user-attachments/assets/919f483e-c5d0-45e2-be07-e8f561c2e7f0" />

What Should Happen?

It should be able to read or get the feedback from other team members without Sibling tool call errored

Error Messages/Logs

● Task Output(non-blocking) app-reviewer@code-review                                                                                         
  ⎿  Error: No task found with ID: app-reviewer@code-review                                                                                  
                                                                                                                                             
● Task Output(non-blocking) db-reviewer@code-review                                                                                          
  ⎿  Error: Sibling tool call errored                                                                                                        
                                                                                                                                             
● Task Output(non-blocking) health-reviewer@code-review                                                                                      
  ⎿  Error: Sibling tool call errored                                                                                                        
                                                                                                                                             
● Task Output(non-blocking) aws-reviewer@code-review
  ⎿  Error: Sibling tool call errored

Steps to Reproduce

Prompt claude code to use team agent when reviewing the code change it made

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.37

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

<img width="1443" height="347" alt="Image" src="https://github.com/user-attachments/assets/8627829f-34b4-4679-b74f-05a7527af08e" />