GitHub Copilot CLI PowerShell Tool Failure

[ChristopherWheatcroft]

Describe the bug

The PowerShell tool in Copilot CLI fails to execute ANY commands, even basic ones. All commands timeout immediately, and session IDs are reported as invalid.

Environment:

• OS: Windows_NT
• Working Directory: C:\Dev\GitHub
• I, as a user, can execute PowerShell commands directly in the terminal successfully

Affected version

0.0.331 Commit: eb0ae04

Steps to reproduce the behavior

1. Use any PowerShell command via the Copilot CLI tool with async: false
2. Even simple commands like Get-Location or pwd timeout after specified timeout period
3. When using async: true, commands timeout with negative time (-0.001 seconds)
4. Session IDs become invalid immediately and cannot be read via read_powershel

Expected behavior

• PowerShell commands should execute normally
• Sessions should be created and accessible
• Commands like Get-Location should return instantly

Additional context

Examples Tested:

• Get-Location (timeout: 45s) - Failed
• pwd (timeout: 60s) - Failed
• echo "# Test MD File" > test.md - Failed
• Write-Host "Testing PowerShell" (async) - Failed immediately

[doggy8088]

I have similar issue posted here: #176

[SteveSandersonMS]

@ChristopherWheatcroft Interesting. Thanks for reporting this.

Could you open a cmd.exe window (not a PowerShell window) and run a simple PowerShell command and tell us what happens? e.g., from cmd.exe run:

pwsh -c "echo hello"

[doggy8088]

@SteveSandersonMS

When run pwsh -c "echo hello", it will load $PROFILE by default. The result might vary. My $PROFILE contains clear screen.

Also, I also tried pwsh -nop -c "echo hello", it will show like this: