Delete Write-an-Extension.md

Write-an-Extension.md

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-# 🆕 Setup Extensions: Host + Options Support
-
-The **Setup Extensions** system now supports extended script metadata in the header.  
-This allows script authors to define dropdown menus and control how the script is executed.
-
----
-
-## ✅ New Metadata Parameters
-
-### `# Description: <string>`
-- Short, user-friendly description of what the script does.
-- Displayed in the Extensions page below the title.
-
-### `# Host: embedded | console`
-- **embedded** = run inside OOBE, output is captured and shown in the app.  
-- **console** = run in an external PowerShell window with `-NoExit`.  
-- **Default:** `embedded` (if not specified).
-
-### `# Options: value1; value2; value3; ...`
-- Defines multiple selectable actions for a single script.
-- A dropdown is automatically shown in the Extensions page.
-- The selected value is passed to the script as `$choice`.
-
----
-
-## 📄 Example Script Header
-
-```powershell
-# Description: File Explorer tweaks
-# Host: embedded
-# Options: Show file extensions; Hide file extensions; Open This PC
-
-param([string]$choice)
-switch ($choice) {
-    "Show file extensions" { ... }
-    "Hide file extensions" { ... }
-    "Open This PC" { ... }
-}