diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 46d3cf0..b391fad 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -82,6 +82,7 @@ jobs:
         run: |
           if [ "${POWERSHELL_AVAILABLE:-false}" != true ]; then exit 0; fi
           pwsh -NoLogo -NoProfile -NonInteractive -File ./scripts/commands/check-capabilities.ps1
+          pwsh -NoLogo -NoProfile -NonInteractive -File ./scripts/commands/build.ps1 -Summary
           for file in scripts/tests/test-*.ps1; do
             echo "==> $file"
             pwsh -NoLogo -NoProfile -NonInteractive -File "$file" -Summary
diff --git a/scripts/lib/plugins.ps1 b/scripts/lib/plugins.ps1
index ca5f82f..b149211 100644
--- a/scripts/lib/plugins.ps1
+++ b/scripts/lib/plugins.ps1
@@ -39,7 +39,8 @@ function Get-InstalledPlugins {
         [ValidateSet('Claude','Codex')][string]$Client,
         [string]$HomePath = [Environment]::GetFolderPath('UserProfile')
     )
-    $command = Get-Command $Client.ToLowerInvariant() -ErrorAction Stop
+    $command = Get-Command $Client.ToLowerInvariant() -ErrorAction SilentlyContinue
+    if (-not $command) { return @() }
     $environment = @{
         HOME = $HomePath
         USERPROFILE = $HomePath
diff --git a/scripts/lib/plugins.sh b/scripts/lib/plugins.sh
index 245b192..d0e26fc 100755
--- a/scripts/lib/plugins.sh
+++ b/scripts/lib/plugins.sh
@@ -4,6 +4,7 @@ set -euo pipefail
 plugin_installed() {
   local client=$1 plugin=$2
   local inventory
+  command -v "$client" >/dev/null 2>&1 || return 1
   inventory=$("$client" plugin list --json) || return 2
   printf '%s' "$inventory" | python3 -c '
 import json, sys