[Claude] Use Edge's PDF icon while opening PDFs in Chrome

Set-PdfIcon.ps1

#Requires -Version 5.1
<#
.SYNOPSIS
    Restores PDF icon and preview pane in Explorer while keeping Chrome as the opener.

.DESCRIPTION
    When Chrome is set as the default PDF opener, Windows resolves icons and shell
    extensions through the ChromePDF ProgID, which Chrome doesn't bother setting up
    properly. This script adds HKCU overrides on ChromePDF to:
      - Show Edge's PDF icon instead of Chrome's generic one
      - Register the Windows built-in PDF preview handler so the preview pane works

    The open action is untouched, so Chrome keeps opening PDF files.
#>

Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

$PreviewHandlerGuid  = "{8895b1c6-b41f-4c1c-a562-0d564250836f}"
$PreviewHandlerClsid = "{3A84F9C2-6164-485C-A7D9-4B27F8AC009E}"
$ChromePdfKey        = "HKCU:\SOFTWARE\Classes\ChromePDF"

function Set-ChromePdfIcon {
    $edgeIcon = Get-ItemPropertyValue "HKLM:\SOFTWARE\Classes\MSEdgePDF\DefaultIcon" -Name "(default)" -ErrorAction Stop
    $exePath  = ($edgeIcon -split ",")[0]
    if (-not (Test-Path $exePath)) {
        throw "Edge executable not found at: $exePath — is Edge installed?"
    }

    New-Item -Path "$ChromePdfKey\DefaultIcon" -Force | Out-Null
    Set-ItemProperty -Path "$ChromePdfKey\DefaultIcon" -Name "(default)" -Value $edgeIcon
    Write-Host "Icon set to: $edgeIcon"
}

function Set-ChromePdfPreviewHandler {
    New-Item -Path "$ChromePdfKey\ShellEx\$PreviewHandlerGuid" -Force | Out-Null
    Set-ItemProperty -Path "$ChromePdfKey\ShellEx\$PreviewHandlerGuid" -Name "(default)" -Value $PreviewHandlerClsid
    Write-Host "Preview handler registered: $PreviewHandlerClsid"
}

function Reset-IconCache {
    Stop-Process -Name explorer -Force -ErrorAction SilentlyContinue
    Start-Sleep -Seconds 2

    Get-ChildItem "$env:LOCALAPPDATA\Microsoft\Windows\Explorer\iconcache_*.db" -ErrorAction SilentlyContinue |
        Remove-Item -Force -ErrorAction SilentlyContinue

    Start-Process explorer.exe
    Write-Host "Explorer restarted and icon cache cleared."
}

Set-ChromePdfIcon
Set-ChromePdfPreviewHandler
Reset-IconCache

Write-Host "Done. PDF files should now show the Edge PDF icon and preview in Explorer."