Fix Windows SDK bootstrap download path

ddiff --git a/.github/workflows/windows-source-sdk-dlls.yml b/.github/workflows/windows-source-sdk-dlls.yml
iindex 1d7af85..b606c38 100644
---- a/.github/workflows/windows-source-sdk-dlls.yml
++++ b/.github/workflows/windows-source-sdk-dlls.yml
@@@ -60,7 +60,7 @@ jobs:
            Get-ChildItem -Force | Select-Object Mode,Length,Name | Tee-Object -FilePath artifacts/windows-build-debug/repo-root-before-build.txt
            if (Test-Path engine) { Get-ChildItem -Force engine | Select-Object Mode,Length,Name | Tee-Object -FilePath artifacts/windows-build-debug/engine-before-build.txt } else { Write-Host "[miss] engine directory" }
  
--      - name: Bootstrap Source SDK 2013 MP
++      - name: Bootstrap Source SDK 2013
          run: |
            $ErrorActionPreference = 'Stop'
            powershell -NoProfile -ExecutionPolicy Bypass -File tools/bootstrap-source-sdk-2013-windows.ps1 *>&1 | Tee-Object -FilePath artifacts/windows-build-debug/bootstrap-source-sdk-2013.log
ddiff --git a/docs/WINDOWS_WORKFLOW_SDK_BOOTSTRAP.md b/docs/WINDOWS_WORKFLOW_SDK_BOOTSTRAP.md
iindex 0bfa3b3..a947250 100644
---- a/docs/WINDOWS_WORKFLOW_SDK_BOOTSTRAP.md
++++ b/docs/WINDOWS_WORKFLOW_SDK_BOOTSTRAP.md
@@@ -1,10 +1,24 @@
  # Windows Source SDK bootstrap
  
--The GitHub Actions Windows runner does not have Alex's local `engine/source-sdk-2013` checkout. The workflow bootstraps it by cloning ValveSoftware/source-sdk-2013.
++The Windows GitHub Actions runner is fresh and does not have Alex's local `engine/source-sdk-2013` checkout.
  
--Important detail: the Source SDK 2013 multiplayer code is normally on the `mp` branch, not necessarily in a `mp/` directory on the default branch. The bootstrap script now supports both layouts:
++The workflow bootstraps Valve's public Source SDK 2013 repository into:
  
--- `source-sdk-2013` checked out directly on the `mp` branch, with `src/...` at repo root
--- older/mirrored layout with `mp/src/...`
++```text
++engine/source-sdk-2013
++```
  
--The workflow should not upload or install stock/stale DLLs. A DLL artifact is considered useful only when `client.dll` contains OpenVibe command strings such as `ov_join`, `ov_menu`, or `OpenVibe`.
++The expected SDK layout is:
++
++```text
++engine/source-sdk-2013/src/game/client/hl2mp
++engine/source-sdk-2013/src/game/server/hl2mp
++```
++
++The bootstrap intentionally downloads the default/master zip first:
++
++```text
++https://codeload.github.com/ValveSoftware/source-sdk-2013/zip/refs/heads/master
++```
++
++This avoids brittle branch assumptions and avoids GitHub Actions `git` auth/header issues. A git clone fallback is still present for debugging.
ddiff --git a/tools/bootstrap-source-sdk-2013-windows.ps1 b/tools/bootstrap-source-sdk-2013-windows.ps1
iindex 26e3197..9129bd7 100644
---- a/tools/bootstrap-source-sdk-2013-windows.ps1
++++ b/tools/bootstrap-source-sdk-2013-windows.ps1
@@@ -5,94 +5,106 @@ $Sdk = if ($env:OPENVIBE_SDK) { $env:OPENVIBE_SDK } else { Join-Path $Root 'engi
  $Src = Join-Path $Sdk 'src'
  $Deps = Join-Path $Root '_deps'
  $LogDir = Join-Path $Root 'artifacts/windows-build-debug'
--New-Item -ItemType Directory -Force -Path $LogDir | Out-Null
++New-Item -ItemType Directory -Force -Path $Deps, $LogDir | Out-Null
  
  function Say($m) { Write-Host "[openvibe-sdk-bootstrap] $m" }
--function Has-HL2MP($base) {
--  return ((Test-Path (Join-Path $base 'src/game/client/hl2mp')) -and (Test-Path (Join-Path $base 'src/game/server/hl2mp')))
++function Dump-Dir($path, $outName) {
++  try {
++    if (Test-Path $path) {
++      Get-ChildItem -Force $path | Select-Object Mode,Length,Name | Format-Table -AutoSize | Out-File (Join-Path $LogDir $outName)
++    } else {
++      "[missing] $path" | Out-File (Join-Path $LogDir $outName)
++    }
++  } catch {
++    "dump failed: $($_.Exception.Message)" | Out-File (Join-Path $LogDir $outName)
++  }
  }
--function Run-Git($args, $logName) {
--  $log = Join-Path $LogDir $logName
--  Say "git $args"
--  & git @args 2>&1 | Tee-Object -FilePath $log
--  if ($LASTEXITCODE -ne 0) { throw "git $args failed with exit code $LASTEXITCODE. See $log" }
++function Assert-UsableSdk($prefix) {
++  if ((Test-Path (Join-Path $Src 'game/client/hl2mp')) -and (Test-Path (Join-Path $Src 'game/server/hl2mp'))) {
++    Say "$prefix SDK tree looks usable"
++    return $true
++  }
++  return $false
++}
++function Copy-SdkRoot($sourceRoot) {
++  Say "copying SDK root $sourceRoot -> $Sdk"
++  if (Test-Path $Sdk) { Remove-Item -Recurse -Force $Sdk }
++  New-Item -ItemType Directory -Force -Path $Sdk | Out-Null
++  Copy-Item -Path (Join-Path $sourceRoot '*') -Destination $Sdk -Recurse -Force
++  Dump-Dir $Sdk 'sdk-root-after-copy.txt'
++  if (!(Assert-UsableSdk 'copied')) {
++    throw "Copied SDK is missing expected HL2MP folders under $Src"
++  }
  }
  
  Say "root=$Root"
  Say "sdk=$Sdk"
--Say "logdir=$LogDir"
++Say "deps=$Deps"
  
--if (Has-HL2MP $Sdk) {
--  Say "existing SDK tree already contains HL2MP client/server"
--  exit 0
--}
++if (Assert-UsableSdk 'existing') { exit 0 }
  
--New-Item -ItemType Directory -Force -Path $Deps | Out-Null
++# ValveSoftware/source-sdk-2013 currently uses the default/master layout with src/ at the repository root.
++# Do not assume an mp branch or mp/src folder. Downloading the zip avoids git/extraheader/auth weirdness on Actions runners.
++$zip = Join-Path $Deps 'source-sdk-2013-master.zip'
++$extractParent = Join-Path $Deps 'source-sdk-2013-zip'
++$zipRoot = Join-Path $extractParent 'source-sdk-2013-master'
++$zipUrl = 'https://codeload.github.com/ValveSoftware/source-sdk-2013/zip/refs/heads/master'
  
--# Valve's source-sdk-2013 repository is normally organized by branches: mp and sp.
--# Some forks/mirrors use root folders like mp/src. Support both layouts.
--$RepoUrl = if ($env:OPENVIBE_SOURCE_SDK_REPO) { $env:OPENVIBE_SOURCE_SDK_REPO } else { 'https://github.com/ValveSoftware/source-sdk-2013.git' }
--$ValveRepo = Join-Path $Deps 'source-sdk-2013-mp'
--
--if (Test-Path $ValveRepo) { Remove-Item -Recurse -Force $ValveRepo }
--
--$cloned = $false
++$zipOk = $false
  try {
--  Say "cloning Valve Source SDK 2013 branch mp"
--  Run-Git @('clone','--depth','1','--branch','mp',$RepoUrl,$ValveRepo) 'bootstrap-git-clone-mp.log'
--  $cloned = $true
--} catch {
--  Say "mp branch clone failed: $($_.Exception.Message)"
--  if (Test-Path $ValveRepo) { Remove-Item -Recurse -Force $ValveRepo }
--  Say "falling back to default branch clone"
--  Run-Git @('clone','--depth','1',$RepoUrl,$ValveRepo) 'bootstrap-git-clone-default.log'
--  $cloned = $true
--}
--
--if (-not $cloned) { throw "could not clone Source SDK repo" }
++  Say "downloading Valve SDK master zip from $zipUrl"
++  if (Test-Path $zip) { Remove-Item -Force $zip }
++  if (Test-Path $extractParent) { Remove-Item -Recurse -Force $extractParent }
++  New-Item -ItemType Directory -Force -Path $extractParent | Out-Null
++
++  if (Get-Command curl.exe -ErrorAction SilentlyContinue) {
++    & curl.exe -L --retry 4 --retry-delay 3 --connect-timeout 30 -o $zip $zipUrl 2>&1 | Tee-Object -FilePath (Join-Path $LogDir 'bootstrap-curl-master-zip.log')
++    if ($LASTEXITCODE -ne 0) { throw "curl.exe failed with exit code $LASTEXITCODE" }
++  } else {
++    Invoke-WebRequest -Uri $zipUrl -OutFile $zip -UseBasicParsing 2>&1 | Tee-Object -FilePath (Join-Path $LogDir 'bootstrap-iwr-master-zip.log')
++  }
  
--"=== Valve repo root ===" | Out-File (Join-Path $LogDir 'valve-repo-root.txt')
--Get-ChildItem -Force $ValveRepo | Select-Object Mode,Length,Name | Format-Table -AutoSize | Out-File (Join-Path $LogDir 'valve-repo-root.txt') -Append
--"=== candidate src folders ===" | Out-File (Join-Path $LogDir 'valve-candidate-src.txt')
--Get-ChildItem -Path $ValveRepo -Recurse -Directory -Filter src -ErrorAction SilentlyContinue |
--  Select-Object FullName | Format-List | Out-File (Join-Path $LogDir 'valve-candidate-src.txt') -Append
++  $zipInfo = Get-Item $zip
++  Say "zip bytes=$($zipInfo.Length)"
++  if ($zipInfo.Length -lt 1000000) { throw "downloaded zip is suspiciously small" }
  
--$candidates = @(
--  $ValveRepo,
--  (Join-Path $ValveRepo 'mp'),
--  (Join-Path $ValveRepo 'srcsdk/mp'),
--  (Join-Path $ValveRepo 'source-sdk-2013/mp')
--)
++  Expand-Archive -Path $zip -DestinationPath $extractParent -Force
++  Dump-Dir $extractParent 'zip-extract-parent.txt'
++  Dump-Dir $zipRoot 'zip-root.txt'
  
--$SourceRoot = $null
--foreach ($candidate in $candidates) {
--  if (Has-HL2MP $candidate) {
--    $SourceRoot = $candidate
--    break
++  if (Test-Path (Join-Path $zipRoot 'src/game/client/hl2mp')) {
++    Copy-SdkRoot $zipRoot
++    $zipOk = $true
++  } else {
++    throw "zip did not contain expected src/game/client/hl2mp at $zipRoot"
    }
++} catch {
++  Say "zip bootstrap failed: $($_.Exception.Message)"
++  $_ | Out-String | Out-File (Join-Path $LogDir 'bootstrap-zip-exception.txt')
  }
  
--if (-not $SourceRoot) {
--  $matches = Get-ChildItem -Path $ValveRepo -Recurse -Directory -Filter hl2mp -ErrorAction SilentlyContinue |
--    Where-Object { $_.FullName -match '[\\/]src[\\/]game[\\/](client|server)[\\/]hl2mp$' }
--  $matches | Select-Object FullName | Format-List | Out-File (Join-Path $LogDir 'hl2mp-folder-search.txt')
--  throw "Could not find Source SDK 2013 MP HL2MP layout after clone. Check valve-repo-root.txt, valve-candidate-src.txt, and hl2mp-folder-search.txt."
--}
--
--Say "source root=$SourceRoot"
--Say "copying Source SDK MP layout into $Sdk"
--if (Test-Path $Sdk) { Remove-Item -Recurse -Force $Sdk }
--New-Item -ItemType Directory -Force -Path $Sdk | Out-Null
--Copy-Item -Path (Join-Path $SourceRoot '*') -Destination $Sdk -Recurse -Force
++if ($zipOk) { Say 'SDK bootstrapped successfully from zip'; exit 0 }
  
--if (!(Has-HL2MP $Sdk)) {
--  Get-ChildItem -Force $Sdk | Select-Object Mode,Length,Name | Format-Table -AutoSize | Out-File (Join-Path $LogDir 'sdk-root-after-copy.txt')
--  throw "Bootstrapped SDK is missing expected HL2MP folders after copy"
++# Last-resort git fallback. Clear possible GitHub Actions extraheaders and force public HTTPS.
++$gitRepo = Join-Path $Deps 'source-sdk-2013-git'
++try {
++  Say "trying git clone fallback"
++  git config --global --unset-all http.https://github.com/.extraheader 2>$null
++  git config --global --unset-all http.https://github.com/ValveSoftware/source-sdk-2013.extraheader 2>$null
++  if (Test-Path $gitRepo) { Remove-Item -Recurse -Force $gitRepo }
++  & git -c http.https://github.com/.extraheader= clone --depth 1 --single-branch https://github.com/ValveSoftware/source-sdk-2013.git $gitRepo 2>&1 | Tee-Object -FilePath (Join-Path $LogDir 'bootstrap-git-clone-master.log')
++  if ($LASTEXITCODE -ne 0) { throw "git clone failed with exit code $LASTEXITCODE" }
++  Dump-Dir $gitRepo 'git-root.txt'
++  if (Test-Path (Join-Path $gitRepo 'src/game/client/hl2mp')) {
++    Copy-SdkRoot $gitRepo
++    Say 'SDK bootstrapped successfully from git'
++    exit 0
++  }
++  throw "git clone did not contain src/game/client/hl2mp"
++} catch {
++  Say "git bootstrap failed: $($_.Exception.Message)"
++  $_ | Out-String | Out-File (Join-Path $LogDir 'bootstrap-git-exception.txt')
  }
  
--"=== SDK root after copy ===" | Out-File (Join-Path $LogDir 'sdk-root-after-copy.txt')
--Get-ChildItem -Force $Sdk | Select-Object Mode,Length,Name | Format-Table -AutoSize | Out-File (Join-Path $LogDir 'sdk-root-after-copy.txt') -Append
--"=== SDK src root after copy ===" | Out-File (Join-Path $LogDir 'sdk-src-root-after-copy.txt')
--Get-ChildItem -Force (Join-Path $Sdk 'src') | Select-Object Mode,Length,Name | Format-Table -AutoSize | Out-File (Join-Path $LogDir 'sdk-src-root-after-copy.txt') -Append
--
--Say "SDK bootstrapped successfully"
++Dump-Dir $Deps 'deps-after-bootstrap-failure.txt'
++throw "Could not bootstrap ValveSoftware/source-sdk-2013. Check openvibe-windows-build-debug artifact, especially bootstrap-curl-master-zip.log, bootstrap-zip-exception.txt, and bootstrap-git-clone-master.log."
ddiff --git a/tools/windows-workflow-debug-and-install.sh b/tools/windows-workflow-debug-and-install.sh
iindex 0084b53..dbc0e86 100755
---- a/tools/windows-workflow-debug-and-install.sh
++++ b/tools/windows-workflow-debug-and-install.sh
@@@ -52,3 +52,6 @@ else
    echo "[openvibe] no DLL artifact available yet" >&2
    exit 3
  fi
++
++
++# Extra bootstrap tails for current Windows workflow debugging.