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update_act_runner.ps1

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+#!/usr/bin/env pwsh
+# Update act_runner to latest release from Gitea
+# Usage: ./update_act_runner.ps1 [-Force]
+
+param(
+    [switch]$Force,
+    [string]$Arch = "windows-amd64",
+    [string]$ExeName = "act_runner.exe"
+)
+
+$ErrorActionPreference = 'Stop'
+
+$API = "https://gitea.com/api/v1/repos/gitea/act_runner/releases/latest"
+$ExePath = Join-Path $PSScriptRoot $ExeName
+
+function Get-CurrentVersion {
+    if (-not (Test-Path $ExePath)) { return $null }
+    $out = & $ExePath --version 2>&1 | Select-Object -First 1
+    if ($out -match '(\d+\.\d+\.\d+)') { return $matches[1] }
+    return $null
+}
+
+# Fetch latest release info
+Write-Host "Fetching latest release info..." -ForegroundColor Cyan
+$release = Invoke-RestMethod -Uri $API
+
+$tag = $release.tag_name -replace '^v', ''
+$currentVersion = Get-CurrentVersion
+
+Write-Host "Latest: $tag | Current: $($currentVersion ?? 'not installed')"
+
+if ($currentVersion -eq $tag -and -not $Force) {
+    Write-Host "Already up to date." -ForegroundColor Green
+    exit 0
+}
+
+# Find the right asset
+$pattern = "act_runner-.*-$Arch\.exe$"
+$asset = $release.assets | Where-Object { $_.name -match $pattern } | Select-Object -First 1
+
+if (-not $asset) {
+    Write-Error "No asset found matching pattern: $pattern"
+    exit 1
+}
+
+$downloadUrl = $asset.browser_download_url
+Write-Host "Downloading $($asset.name)..." -ForegroundColor Cyan
+
+# Download to temp then move
+$tmpFile = Join-Path $PSScriptRoot "act_runner.tmp.exe"
+Invoke-WebRequest -Uri $downloadUrl -OutFile $tmpFile -UseBasicParsing
+
+# Stop running instance if any
+$running = Get-Process | Where-Object { $_.Path -eq $ExePath } | Select-Object -First 1
+if ($running) {
+    Write-Host "Stopping running act_runner (PID $($running.Id))..." -ForegroundColor Yellow
+    Stop-Process -Id $running.Id -Force
+    Start-Sleep -Milliseconds 500
+}
+
+# Replace
+Move-Item -Path $tmpFile -Destination $ExePath -Force
+
+Write-Host "Updated to $tag" -ForegroundColor Green