diff --git a/CirnoBuild.psm1 b/CirnoBuild.psm1
index 6cb98382..4ebefd4a 100644
--- a/CirnoBuild.psm1
+++ b/CirnoBuild.psm1
@@ -125,16 +125,20 @@ function Initialize-BuildDirectories {
     
     Write-Host "Initializing build directories..." -ForegroundColor Cyan
     
-    if (Test-Path $BuildDir) {
-        Remove-Item "$BuildDir\*" -Recurse -Force -ErrorAction SilentlyContinue
-    } else {
+    # Ensure the root build directory exists but DO NOT delete its contents (preserve logs and zips)
+    if (-not (Test-Path $BuildDir)) {
         New-Item -ItemType Directory -Path $BuildDir | Out-Null
     }
     
     foreach ($platform in $PlatformsToBuild) {
         $platformDir = Join-Path $BuildDir $script:platforms[$platform].OutputSubDir
-        New-Item -ItemType Directory -Path $platformDir -Force | Out-Null
-        Write-Host "  Created: $platformDir" -ForegroundColor Gray
+        if (Test-Path $platformDir) {
+            # Clear only the platform directory contents
+            Remove-Item "$platformDir\*" -Recurse -Force -ErrorAction SilentlyContinue
+        } else {
+            New-Item -ItemType Directory -Path $platformDir -Force | Out-Null
+        }
+        Write-Host "  Prepared: $platformDir" -ForegroundColor Gray
     }
 }
 
@@ -254,7 +258,7 @@ function Create-PlatformZip {
     # Create zip
     Write-Host "  Creating zip archive: $zipFileName" -ForegroundColor Cyan
     try {
-        if (Test-Path $zipFilePath) { Remove-Item $zipFilePath -Force }
+        # Do not explicitly delete existing zip to avoid losing historical artifacts; Compress-Archive -Force will overwrite
         Compress-Archive -Path "$platformDir\*" -DestinationPath $zipFilePath -Force
         Write-Host "  Zip created: $zipFilePath" -ForegroundColor Green
         return $zipFilePath