feat: add PowerShell install script and Windows instructions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Reuben Brooks

README.md

@@ -22,11 +22,25 @@ Desktop application for visual task management and real-time AI agent control.
 
 ## Install
 
+### macOS / Linux
+
 ```bash
 curl -sSf https://raw.githubusercontent.com/pyrex41/scud/master/install.sh | sh
 ```
 
-This installs both `scud` (CLI) and `rho-cli` (default AI harness). Works on macOS, Linux, and WSL. Requires Rust — the script will install it via rustup if needed.
+### Windows (PowerShell)
+
+```powershell
+irm https://raw.githubusercontent.com/pyrex41/scud/master/install.ps1 | iex
+```
+
+Or via WSL:
+
+```powershell
+wsl curl -sSf https://raw.githubusercontent.com/pyrex41/scud/master/install.sh | sh
+```
+
+Installs both `scud` (CLI) and `rho-cli` (default AI harness). Downloads prebuilt binaries when available, falls back to `cargo install`.
 
 ### Manual Install
 

install.ps1

@@ -0,0 +1,81 @@
+# SCUD + Rho Installer for Windows
+# irm https://raw.githubusercontent.com/pyrex41/scud/master/install.ps1 | iex
+$ErrorActionPreference = "Stop"
+
+$ScudRepo = "pyrex41/scud"
+$RhoRepo = "pyrex41/rho"
+$InstallDir = if ($env:INSTALL_DIR) { $env:INSTALL_DIR } else { "$env:USERPROFILE\.local\bin" }
+
+function Download-Binary {
+    param($Repo, $BinName, $AssetPrefix)
+
+    $Asset = "$AssetPrefix-windows-x64.exe"
+    $Dest = "$InstallDir\$BinName.exe"
+
+    try {
+        $Release = Invoke-RestMethod -Uri "https://api.github.com/repos/$Repo/releases/latest"
+        $Tag = $Release.tag_name
+    } catch {
+        Write-Host "  Could not fetch latest release for $Repo"
+        return $false
+    }
+
+    $Url = "https://github.com/$Repo/releases/download/$Tag/$Asset"
+    Write-Host "  Downloading $BinName $Tag (windows/x64)..."
+
+    try {
+        Invoke-WebRequest -Uri $Url -OutFile $Dest -UseBasicParsing
+        Write-Host "  Installed $BinName to $Dest"
+        return $true
+    } catch {
+        Write-Host "  Download failed: $_"
+        return $false
+    }
+}
+
+function Cargo-Fallback {
+    param($BinName, $CrateName)
+
+    Write-Host "  Prebuilt binary not available. Installing via cargo..."
+    if (-not (Get-Command cargo -ErrorAction SilentlyContinue)) {
+        Write-Host "  Rust not found. Install from https://rustup.rs first."
+        exit 1
+    }
+    cargo install $CrateName
+}
+
+Write-Host "Installing SCUD CLI + Rho harness..."
+Write-Host ""
+
+if (-not (Test-Path $InstallDir)) {
+    New-Item -ItemType Directory -Path $InstallDir -Force | Out-Null
+}
+
+# Install scud
+Write-Host "scud:"
+if (-not (Download-Binary -Repo $ScudRepo -BinName "scud" -AssetPrefix "scud")) {
+    Cargo-Fallback -BinName "scud" -CrateName "scud-cli"
+}
+
+Write-Host ""
+
+# Install rho-cli
+Write-Host "rho-cli:"
+if (-not (Download-Binary -Repo $RhoRepo -BinName "rho-cli" -AssetPrefix "rho-cli")) {
+    Cargo-Fallback -BinName "rho-cli" -CrateName "rho-agent"
+}
+
+Write-Host ""
+
+# Check PATH
+if ($env:PATH -notlike "*$InstallDir*") {
+    Write-Host "Add $InstallDir to your PATH:"
+    Write-Host "  [Environment]::SetEnvironmentVariable('PATH', `"$InstallDir;`$env:PATH`", 'User')"
+    Write-Host ""
+    Write-Host "Or run this to add it now (current session only):"
+    Write-Host "  `$env:PATH = `"$InstallDir;`$env:PATH`""
+    Write-Host ""
+}
+
+Write-Host "Done! Run 'scud init' in any project to get started."
+Write-Host "https://github.com/pyrex41/scud"