Fix the OSArchitecture retrieval in powershell install

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
72/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Quiet
Tech stack
powershell
Domain
cli, operating-systems

Research direction

Start in scripts/install/install.ps1 at lines 710-729 and compare the current OS architecture lookup with the change proposed in issue #20782. Verify that the architecture branches shown for arm64 and x64 are selected reliably across the affected PowerShell versions, and confirm the installer no longer fails for the reported cases.

Written by the indexing model from the issue text.

Description

bug CLI windows-os

PowerShell architecture system var is fragile. On some versions the install is broken. There is a simple change proposed by @thedwindlingdba in #20782. This will also fix #19559

...
$architecture = [System.Runtime.InteropServices.RuntimeInformation,mscorlib]::OSArchitecture.ToString().ToLower()
...
switch($architecture) {
    "arm64" { ... }
    "x64" { ... }
}

These lines should change (or open the repo for external PRs): https://github.com/openai/codex/blob/a71e040df51ec0e1f5523bf0ff5f1bef39858128/scripts/install/install.ps1#L710-L729

Dominant language
Rust
Stars
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Forks
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Avg merge
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Merged PRs (30d)
1k

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