Conditional Breakpoint query does not work in pipeline ($_ not recognized)

Prerequisites

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• I have searched all open and closed issues to ensure it has not already been reported.
• I have read the troubleshooting guide.
• I am sure this issue is with the extension itself and does not reproduce in a standalone PowerShell instance.
• I have verified that I am using the latest version of Visual Studio Code and the PowerShell extension.
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Summary

Hi there,

During PSConfEU there was a demo about VSCode and I was following along and I realized that for conditional breakpoints there seems to be a bug where $_ would not be recognized in the queries. If I would use the conditional breakpoint in a foreach loop (keyword) it would work no problem with the loop variable. The issue as far as I can see only exist in Foreach-Object within the pipeline.

PowerShell Version

PS /Users/kevinbates/Code/PSConf25> $PSVersionTable; $host 

Name                           Value
----                           -----
PSVersion                      7.4.6
PSEdition                      Core
GitCommitId                    7.4.6
OS                             Darwin 24.5.0 Darwin Kernel Version 24.5.0: Tue Apr 22 19:54:25 PDT 2025; root:xnu-11417.121.6~2/RELEASE_ARM64_T6020
Platform                       Unix
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Name             : Visual Studio Code Host
Version          : 2025.0.0
InstanceId       : 4c1c07d9-cbf8-40b2-8f41-6c2866edb05b
UI               : System.Management.Automation.Internal.Host.InternalHostUserInterface
CurrentCulture   : en-US
CurrentUICulture : en-US
PrivateData      : Microsoft.PowerShell.ConsoleHost+ConsoleColorProxy
DebuggerEnabled  : True
IsRunspacePushed : False
Runspace         : System.Management.Automation.Runspaces.LocalRunspace

Visual Studio Code Version

PS /Users/kevinbates/Code/PSConf25> code --version
1.100.3
258e40fedc6cb8edf399a463ce3a9d32e7e1f6f3
arm64

Extension Version

PS /Users/kevinbates/Code/PSConf25> code --list-extensions --show-versions | select-string powershell

ms-vscode.powershell@2025.0.0

Steps to Reproduce

I can run this piece of code:

$numbers = 1..100

foreach($number in $numbers){
    write-host $number
}

with the following conditional breakpoint on the line within the loop:

$number -eq 100

And the breakpoint will hit as expected. If I change up my code to use Foreach-Object. It will no longer hit.

1..100 | ForEach-Object {
    write-host $_
}

with the following expression:

$_ -eq 5

Visuals

No response

Logs

No response

Inizia riproducendo il comportamento dei punti di interruzione condizionali in Visual Studio Code con l’estensione PowerShell, confrontando il ciclo foreach con l’esempio di pipeline ForEach-Object dell’issue. Traccia il punto di ingresso della gestione dei punti di interruzione condizionali e verifica che $_ -eq 5 interrompa l’esecuzione nel caso della pipeline senza compromettere il comportamento esistente di $number -eq 100.