fix: PowerShell.Create(Runspace) has no such overload on PS 5.1

[HeyItsGilbert]

Summary

[System.Management.Automation.PowerShell]::Create(Runspace) has no such overload on Windows PowerShell 5.1 — its System.Management.Automation assembly (v3.0.0.0, GAC-loaded) only exposes Create(), Create(RunspaceMode), and Create(InitialSessionState). The single-Runspace-argument overload was added later. Calling it with a runspace argument throws:

MethodException: Cannot find an overload for "Create" and the argument count: "1".

This breaks New-KoanRunspace, and transitively Invoke-Koan and anything that calls it (Get-Karma, etc.) on Windows PowerShell 5.1.

Fix

Split the call into [powershell]::Create() followed by assigning the writable .Runspace property, which works identically on PS 5.1 and 7+. Fixed all three sites using the broken pattern:

• PSKoans/Private/New-KoanRunspace.ps1
• PSKoans/Private/Invoke-Koan.ps1
• Tests/Functions/Private/New-KoanRunspace.Tests.ps1 (the test itself used the same broken call)

Verification

Built the module and ran the actual affected Pester suites against the built output:

• Windows PowerShell 5.1 (powershell.exe): New-KoanRunspace.Tests.ps1 + Invoke-Koan.Tests.ps1 — 7/7 passed (previously threw the MethodException above).
• pwsh 7: same two files + Get-Karma.Tests.ps1 — 23/23 passed.

[Copilot]

🟢 Approval recommended

No unresolved issues were identified, and compatibility was verified across PowerShell 5.1 and 7.

Pull request overview

Fixes PowerShell runspace creation compatibility with Windows PowerShell 5.1.

Changes:

• Replaces unsupported Create(Runspace) calls with Create() plus .Runspace assignment.
• Updates the affected test setup.
• Verified on PowerShell 5.1 and 7.

File summaries

File	Description
Tests/Functions/Private/New-KoanRunspace.Tests.ps1	Updates test setup to use the supported API.
PSKoans/Private/New-KoanRunspace.ps1	Creates and assigns the runspace compatibly.
PSKoans/Private/Invoke-Koan.ps1	Uses the compatible runspace assignment pattern.

Review details

• Files reviewed: 3/3 changed files
• Comments generated: 0
• Review effort level: Lite

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[github-actions]

Test Results

    4 files  ±0    104 suites  ±0   1m 32s ⏱️ -9s
1 544 tests ±0  1 520 ✅ +13  24 💤 ±0  0 ❌  - 13 
2 964 runs  ±0  2 932 ✅ +13  32 💤 ±0  0 ❌  - 13 

Results for commit 0186e32. ± Comparison against base commit 2a696a6.

This pull request removes 30 and adds 30 tests. Note that renamed tests count towards both.

/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has exactly one line feed at EOF in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/Output/PSKoans/0.67.0/Private/Invoke-Koan.ps1'; Length=3091; Name='Invoke-Koan.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has exactly one line feed at EOF in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/Output/PSKoans/0.67.0/Private/New-KoanRunspace.ps1'; Length=1420; Name='New-KoanRunspace.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has exactly one line feed at EOF in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/PSKoans/Private/Invoke-Koan.ps1'; Length=3091; Name='Invoke-Koan.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has exactly one line feed at EOF in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/PSKoans/Private/New-KoanRunspace.ps1'; Length=1420; Name='New-KoanRunspace.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has exactly one line feed at EOF in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/tests/Functions/Private/New-KoanRunspace.Tests.ps1'; Length=2128; Name='New-KoanRunspace.Tests.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has no invalid syntax errors in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/Output/PSKoans/0.67.0/Private/Invoke-Koan.ps1'; Length=3091; Name='Invoke-Koan.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has no invalid syntax errors in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/Output/PSKoans/0.67.0/Private/New-KoanRunspace.ps1'; Length=1420; Name='New-KoanRunspace.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has no invalid syntax errors in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/PSKoans/Private/Invoke-Koan.ps1'; Length=3091; Name='Invoke-Koan.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has no invalid syntax errors in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/PSKoans/Private/New-KoanRunspace.ps1'; Length=1420; Name='New-KoanRunspace.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has no invalid syntax errors in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/tests/Functions/Private/New-KoanRunspace.Tests.ps1'; Length=2128; Name='New-KoanRunspace.Tests.ps1'}
…

/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has exactly one line feed at EOF in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/Output/PSKoans/0.67.0/Private/Invoke-Koan.ps1'; Length=3119; Name='Invoke-Koan.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has exactly one line feed at EOF in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/Output/PSKoans/0.67.0/Private/New-KoanRunspace.ps1'; Length=1440; Name='New-KoanRunspace.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has exactly one line feed at EOF in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/PSKoans/Private/Invoke-Koan.ps1'; Length=3119; Name='Invoke-Koan.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has exactly one line feed at EOF in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/PSKoans/Private/New-KoanRunspace.ps1'; Length=1440; Name='New-KoanRunspace.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has exactly one line feed at EOF in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/tests/Functions/Private/New-KoanRunspace.Tests.ps1'; Length=2152; Name='New-KoanRunspace.Tests.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has no invalid syntax errors in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/Output/PSKoans/0.67.0/Private/Invoke-Koan.ps1'; Length=3119; Name='Invoke-Koan.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has no invalid syntax errors in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/Output/PSKoans/0.67.0/Private/New-KoanRunspace.ps1'; Length=1440; Name='New-KoanRunspace.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has no invalid syntax errors in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/PSKoans/Private/Invoke-Koan.ps1'; Length=3119; Name='Invoke-Koan.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has no invalid syntax errors in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/PSKoans/Private/New-KoanRunspace.ps1'; Length=1440; Name='New-KoanRunspace.ps1'}
/Users/runner/work/PSKoans/PSKoans/tests/ModuleValidation.Tests.ps1 ‑ Static Analysis: Module & Repository Files.Repository Code.has no invalid syntax errors in IO.FileInfo{FullName='/Users/runner/work/PSKoans/PSKoans/tests/Functions/Private/New-KoanRunspace.Tests.ps1'; Length=2152; Name='New-KoanRunspace.Tests.ps1'}
…

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