Add image-to-text Describe on the bench via exclusive llama.cpp caption jobs.

scripts/start-comfy-host-agent.ps1

@@ -18,6 +18,12 @@ Get-NetTCPConnection -LocalPort 8199 -State Listen -ErrorAction SilentlyContinue
 
 Start-Sleep -Milliseconds 400
 
+# Caption VLM — point at existing host GGUFs (no download).
+$captionModels = Join-Path $env:LOCALAPPDATA 'Comfy-Desktop\ComfyUI-Shared\models\caption\qwen25vl-7b-nsfw-v4'
+$llamaServer = Join-Path $env:LOCALAPPDATA 'Microsoft\WinGet\Packages\ggml.llamacpp_Microsoft.Winget.Source_8wekyb3d8bbwe\llama-server.exe'
+if (Test-Path $captionModels) { $env:CAPTION_MODELS = $captionModels }
+if (Test-Path $llamaServer) { $env:CAPTION_LLAMA_SERVER = $llamaServer }
+
 if ($Wait) {
   Set-Location $root
   & $node $agent
@@ -31,4 +37,5 @@ $psi.WorkingDirectory = $root
 $psi.UseShellExecute = $false
 $psi.CreateNoWindow = $true
 $psi.WindowStyle = [System.Diagnostics.ProcessWindowStyle]::Hidden
+# CAPTION_* already set on this process; child inherits when UseShellExecute is false
 [void][System.Diagnostics.Process]::Start($psi)