feat(copilot-plugin): add Windows install support

plugins/copilot/README.md

@@ -26,11 +26,18 @@ Installation has two steps: the **plugin** (for skills + MCP) and the **hooks**
 
 ### Step 1: Install hooks into your project
 
+Use the shell installer on macOS/Linux, or the PowerShell installer on Windows.
+
 ```bash
 git clone https://github.com/monte-carlo-data/mc-agent-toolkit.git
 ./mc-agent-toolkit/plugins/copilot/scripts/install.sh /path/to/your/dbt-project
 ```
 
+```powershell
+git clone https://github.com/monte-carlo-data/mc-agent-toolkit.git
+.\mc-agent-toolkit\plugins\copilot\scripts\install.ps1 -TargetDir C:\path\to\your\dbt-project
+```
+
 This copies hook scripts and registration to `.github/hooks/` in your project.
 
 ### Step 2: Install the plugin (skills + MCP)

plugins/copilot/scripts/install.ps1

@@ -0,0 +1,110 @@
+<#
+.SYNOPSIS
+  Monte Carlo Agent Toolkit — Copilot CLI Hook Installer (PowerShell port)
+
+.DESCRIPTION
+  Installs MC Prevent hooks into a target project's .github\hooks\ directory.
+  Usage: .\install.ps1 [-TargetDir <path>]
+#>
+[CmdletBinding()]
+param(
+    [string]
+    $TargetDir = '.'
+)
+
+$ErrorActionPreference = 'Stop'
+
+try {
+    # Resolve paths
+    $TargetDir = (Resolve-Path -Path $TargetDir).Path
+} catch {
+    Write-Error "Error: cannot resolve target directory '$TargetDir'"
+    exit 1
+}
+
+# Script/Repo layout
+$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+$PluginDir = (Resolve-Path -Path (Join-Path $ScriptDir '..')).Path
+$RepoRoot  = (Resolve-Path -Path (Join-Path $PluginDir '..\..')).Path
+$HooksSrc  = Join-Path $PluginDir 'hooks\prevent'
+
+# Prefer plugin-local lib; fall back to repo-level hooks/prevent/lib for compatibility
+$LibSrcPlugin = Join-Path $PluginDir 'hooks\prevent\lib'
+if (Test-Path $LibSrcPlugin) {
+    $LibSrc = $LibSrcPlugin
+} else {
+    $LibSrc = Join-Path $RepoRoot 'hooks\prevent\lib'
+}
+
+# --- Preflight checks ---
+if (-not (Get-Command python3 -ErrorAction SilentlyContinue)) {
+    Write-Error "Error: python3 is required but not installed."
+    exit 1
+}
+
+if (-not (Test-Path (Join-Path $HooksSrc 'pre_edit_hook.py'))) {
+    Write-Error "Error: hook scripts not found at $HooksSrc"
+    exit 1
+}
+
+if (-not (Test-Path (Join-Path $LibSrc 'protocol.py'))) {
+    Write-Error "Error: shared lib not found at $LibSrc"
+    exit 1
+}
+
+Write-Host "Installing MC Prevent hooks for Copilot CLI into: $TargetDir"
+
+# --- 1. Hook scripts ---
+$ScriptsDest = Join-Path $TargetDir '.github\hooks\scripts'
+New-Item -ItemType Directory -Path $ScriptsDest -Force | Out-Null
+
+$scripts = @('pre_edit_hook.py','post_edit_hook.py','pre_commit_hook.py','turn_end_hook.py')
+foreach ($script in $scripts) {
+    $src = Join-Path $HooksSrc $script
+    if (-not (Test-Path $src)) {
+        Write-Error "Missing hook script: $src"
+        exit 1
+    }
+    Copy-Item -Path $src -Destination $ScriptsDest -Force
+}
+
+# If running on a POSIX-like environment with chmod available, mark python hooks executable
+if (Get-Command chmod -ErrorAction SilentlyContinue) {
+    try { & chmod +x (Join-Path $ScriptsDest '*.py') } catch { }
+}
+
+Write-Host "  ✓ Hook scripts copied to .github/hooks/scripts/"
+
+# --- 2. Shared lib (resolve symlinks) ---
+$LibDest = Join-Path $ScriptsDest 'lib'
+New-Item -ItemType Directory -Path $LibDest -Force | Out-Null
+
+# Copy library files (recursively)
+Copy-Item -Path (Join-Path $LibSrc '*') -Destination $LibDest -Recurse -Force -ErrorAction Stop
+
+# Clean dev artifacts
+$testsPath = Join-Path $LibDest 'tests'
+if (Test-Path $testsPath) { Remove-Item -Path $testsPath -Recurse -Force -ErrorAction SilentlyContinue }
+
+Get-ChildItem -Path $LibDest -Recurse -Directory -Force -Filter '__pycache__' -ErrorAction SilentlyContinue |
+    ForEach-Object { Remove-Item -Path $_.FullName -Recurse -Force -ErrorAction SilentlyContinue }
+
+Get-ChildItem -Path $LibDest -Recurse -Include '*.pyc' -File -ErrorAction SilentlyContinue |
+    ForEach-Object { Remove-Item -Path $_.FullName -Force -ErrorAction SilentlyContinue }
+
+Write-Host "  ✓ Shared lib copied to .github/hooks/scripts/lib/"
+
+# --- 3. Hook registration ---
+$HooksDest = Join-Path $TargetDir '.github\hooks'
+if (-not (Test-Path $HooksDest)) { New-Item -ItemType Directory -Path $HooksDest -Force | Out-Null }
+Copy-Item -Path (Join-Path $ScriptDir 'mc-prevent.json') -Destination $HooksDest -Force
+
+Write-Host "  ✓ Hook registration copied to .github/hooks/mc-prevent.json"
+
+Write-Host ""
+Write-Host "Hook installation complete. Next steps:" -ForegroundColor Green
+Write-Host "  1. Install the plugin (for skills + MCP):"
+Write-Host "       copilot plugin install $PluginDir"
+Write-Host "  2. Start a Copilot session:"
+Write-Host "       copilot"
+Write-Host "  3. The Monte Carlo MCP server will prompt for authentication on first use"