Add PowerShell installer and Windows setup instructions to README

README.md

@@ -28,6 +28,39 @@ chmod a+x kubectl-ai
 sudo mv kubectl-ai /usr/local/bin/
 ```
 
+#### Installation on Windows (PowerShell)
+
+```powershell
+# Download precompiled Windows binary:
+Invoke-WebRequest -Uri https://github.com/GoogleCloudPlatform/kubectl-ai/releases/latest/download/kubectl-ai_windows_amd64.exe -OutFile kubectl-ai.exe
+# Or build locally with the script:
+.\install.ps1 -OutputPath .\kubectl-ai.exe
+# (Optional) Move the executable to a directory in your PATH:
+Move-Item .\kubectl-ai.exe -Destination $Env:ProgramFiles\kubectl-ai\kubectl-ai.exe
+```
+
+### Environment Variable Configuration
+
+#### Environment Variable Configuration (PowerShell)
+
+```powershell
+# Gemini (Google AI Studio) – persistent & global:
+setx GEMINI_API_KEY "your_api_key_here" -m
+echo $Env:GEMINI_API_KEY
+
+# OpenAI (or Azure OpenAI) – persistent & global:
+setx OPENAI_API_KEY "your_openai_api_key_here" -m
+echo $Env:OPENAI_API_KEY
+
+# (Optional) For Azure OpenAI – persistent:
+setx OPENAI_ENDPOINT "https://your_azure_openai_endpoint/" -m
+echo $Env:OPENAI_ENDPOINT
+
+# Grok (X.AI) – persistent & global:
+setx GROK_API_KEY "your_xai_api_key_here" -m
+echo $Env:GROK_API_KEY
+```
+
 ### Usage
 
 #### Using Gemini (Default)

install.ps1

@@ -0,0 +1,25 @@
+<#
+.SYNOPSIS
+    Builds kubectl-ai for Windows (amd64).
+.DESCRIPTION
+    This script sets GOOS and GOARCH and runs 'go build'.
+.PARAMETER OutputPath
+    Output path for the executable (default '.\kubectl-ai.exe').
+.EXAMPLE
+    .\install.ps1 -OutputPath .\kubectl-ai.exe
+#>
+param(
+    [string]$OutputPath = ".\kubectl-ai.exe"
+)
+
+Write-Host "Building kubectl-ai for Windows (GOOS=windows, GOARCH=amd64)..."
+$env:GOOS = "windows"
+$env:GOARCH = "amd64"
+
+go build -o $OutputPath .
+if ($LASTEXITCODE -eq 0) {
+    Write-Host "Build succeeded: $OutputPath"
+} else {
+    Write-Error "Build failed with exit code: $LASTEXITCODE"
+    exit 1
+}