diff --git a/build/build-parallel.ps1 b/build/build-parallel.ps1
new file mode 100644
index 0000000..4455390
--- /dev/null
+++ b/build/build-parallel.ps1
@@ -0,0 +1,142 @@
+param(
+    [string]$LogDir = (Join-Path $PSScriptRoot 'target\parallel-logs')
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = 'Stop'
+
+$winScript = Join-Path $PSScriptRoot 'release-windows.ps1'
+$linScript = Join-Path $PSScriptRoot 'release-linux.ps1'
+
+if (-not (Test-Path $winScript)) { throw "File not found: $winScript" }
+if (-not (Test-Path $linScript)) { throw "File not found: $linScript" }
+
+$winLogOut = [System.IO.Path]::GetTempFileName()
+$winLogErr = [System.IO.Path]::GetTempFileName()
+$linLogOut = [System.IO.Path]::GetTempFileName()
+$linLogErr = [System.IO.Path]::GetTempFileName()
+
+# Use only -NoNewWindow, remove -WindowStyle
+$winProc = Start-Process powershell.exe -ArgumentList @('-NoProfile','-ExecutionPolicy','Bypass','-File',"`"$winScript`"") `
+    -RedirectStandardOutput $winLogOut -RedirectStandardError $winLogErr -NoNewWindow -PassThru
+$linProc = Start-Process powershell.exe -ArgumentList @('-NoProfile','-ExecutionPolicy','Bypass','-File',"`"$linScript`"") `
+    -RedirectStandardOutput $linLogOut -RedirectStandardError $linLogErr -NoNewWindow -PassThru
+
+$winPosOut = 0
+$winPosErr = 0
+$linPosOut = 0
+$linPosErr = 0
+
+Write-Host "===== Build Started ====="
+while (-not $winProc.HasExited -or -not $linProc.HasExited) {
+    # windows-release stdout
+    if (Test-Path $winLogOut) {
+        $size = (Get-Item $winLogOut).Length
+        if ($size -gt $winPosOut) {
+            $fs = [System.IO.File]::Open($winLogOut, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read, [System.IO.FileShare]::ReadWrite)
+            $fs.Position = $winPosOut
+            $sr = New-Object System.IO.StreamReader($fs)
+            while (!$sr.EndOfStream) {
+                $line = $sr.ReadLine()
+                if ($line) { Write-Host "[windows-release][OUT] $line" }
+            }
+            $winPosOut = $fs.Position
+            $sr.Close()
+            $fs.Close()
+        }
+    }
+    # windows-release stderr
+    if (Test-Path $winLogErr) {
+        $size = (Get-Item $winLogErr).Length
+        if ($size -gt $winPosErr) {
+            $fs = [System.IO.File]::Open($winLogErr, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read, [System.IO.FileShare]::ReadWrite)
+            $fs.Position = $winPosErr
+            $sr = New-Object System.IO.StreamReader($fs)
+            while (!$sr.EndOfStream) {
+                $line = $sr.ReadLine()
+                if ($line) { Write-Host "[windows-release][ERR] $line" -ForegroundColor Red }
+            }
+            $winPosErr = $fs.Position
+            $sr.Close()
+            $fs.Close()
+        }
+    }
+    # linux-release stdout
+    if (Test-Path $linLogOut) {
+        $size = (Get-Item $linLogOut).Length
+        if ($size -gt $linPosOut) {
+            $fs = [System.IO.File]::Open($linLogOut, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read, [System.IO.FileShare]::ReadWrite)
+            $fs.Position = $linPosOut
+            $sr = New-Object System.IO.StreamReader($fs)
+            while (!$sr.EndOfStream) {
+                $line = $sr.ReadLine()
+                if ($line) { Write-Host "[linux-release][OUT] $line" }
+            }
+            $linPosOut = $fs.Position
+            $sr.Close()
+            $fs.Close()
+        }
+    }
+    # linux-release stderr
+    if (Test-Path $linLogErr) {
+        $size = (Get-Item $linLogErr).Length
+        if ($size -gt $linPosErr) {
+            $fs = [System.IO.File]::Open($linLogErr, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read, [System.IO.FileShare]::ReadWrite)
+            $fs.Position = $linPosErr
+            $sr = New-Object System.IO.StreamReader($fs)
+            while (!$sr.EndOfStream) {
+                $line = $sr.ReadLine()
+                if ($line) { Write-Host "[linux-release][ERR] $line" -ForegroundColor Red }
+            }
+            $linPosErr = $fs.Position
+            $sr.Close()
+            $fs.Close()
+        }
+    }
+    Start-Sleep -Milliseconds 200
+}
+
+# After processes exit, print any remaining output
+$tasks = @(
+    @{proc=$winProc; log=$winLogOut; tag='windows-release'; type='OUT'; skip=$winPosOut},
+    @{proc=$winProc; log=$winLogErr; tag='windows-release'; type='ERR'; skip=$winPosErr},
+    @{proc=$linProc; log=$linLogOut; tag='linux-release'; type='OUT'; skip=$linPosOut},
+    @{proc=$linProc; log=$linLogErr; tag='linux-release'; type='ERR'; skip=$linPosErr}
+)
+foreach ($item in $tasks) {
+    if (Test-Path $item.log) {
+        $fs = [System.IO.File]::Open($item.log, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read, [System.IO.FileShare]::ReadWrite)
+        $fs.Position = $item.skip
+        $sr = New-Object System.IO.StreamReader($fs)
+        while (!$sr.EndOfStream) {
+            $line = $sr.ReadLine()
+            if ($line) {
+                if ($item.type -eq 'ERR') {
+                    Write-Host "[$($item.tag)][ERR] $line" -ForegroundColor Red
+                } else {
+                    Write-Host "[$($item.tag)][OUT] $line"
+                }
+            }
+        }
+        $sr.Close()
+        $fs.Close()
+    }
+}
+
+Write-Host ""
+Write-Host "===== Parallel Build Summary ====="
+Write-Host ("windows-release: " + ($(if ($winProc.ExitCode -eq 0) { 'Success' } else { 'Failed' })))
+Write-Host ("linux-release:   " + ($(if ($linProc.ExitCode -eq 0) { 'Success' } else { 'Failed' })))
+
+if (($winProc.ExitCode -ne 0) -or ($linProc.ExitCode -ne 0)) {
+    Write-Host ""
+    Write-Host "One or more tasks failed." -ForegroundColor Red
+    Remove-Item $winLogOut, $winLogErr, $linLogOut, $linLogErr -Force
+    exit 1
+}
+
+Write-Host ""
+Write-Host "All tasks completed successfully." -ForegroundColor Green
+
+Remove-Item $winLogOut, $winLogErr, $linLogOut, $linLogErr -Force
+exit 0