diff --git a/README.md b/README.md
index 662a07e..6c3e969 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,8 @@ into platform-specific packages that can be inspected before they are installed.
   or deleting them.
 - Dry-run support (no writes, no backups, no plugin changes) and timestamped, per-run backup directories.
 - Shared safety, notification, validation, and status-line hooks.
-- User-level plugin installation for Ponytail, i-have-adhd, Superpowers, and Context7; updates only with
+- User-level plugin installation for Ponytail, i-have-adhd, Superpowers, Context7, Caveman, Humanizer, Impeccable,
+  and Anthropic Frontend Design; updates only with
   `-UpdatePlugins`/`--update-plugins`.
 
 ## Architecture
diff --git a/adapters/plugins.tsv b/adapters/plugins.tsv
index 6003c55..1449ee5 100644
--- a/adapters/plugins.tsv
+++ b/adapters/plugins.tsv
@@ -1,5 +1,9 @@
-name	claude_marketplace	claude_plugin	codex_marketplace	codex_plugin
-Ponytail	DietrichGebert/ponytail	ponytail@ponytail	DietrichGebert/ponytail	ponytail@ponytail
-i-have-adhd	ayghri/i-have-adhd	i-have-adhd@i-have-adhd	ayghri/i-have-adhd	i-have-adhd@i-have-adhd
-Superpowers	-	superpowers@claude-plugins-official	openai-curated-remote	superpowers@openai-curated-remote
-Context7	upstash/context7	context7@context7-marketplace	upstash/context7	context7@context7-marketplace
+name	claude_marketplace	claude_plugin	codex_marketplace	codex_plugin	codex_method	codex_source	codex_skill
+Ponytail	DietrichGebert/ponytail	ponytail@ponytail	DietrichGebert/ponytail	ponytail@ponytail	plugin	-	-
+i-have-adhd	ayghri/i-have-adhd	i-have-adhd@i-have-adhd	ayghri/i-have-adhd	i-have-adhd@i-have-adhd	plugin	-	-
+Superpowers	-	superpowers@claude-plugins-official	openai-curated-remote	superpowers@openai-curated-remote	plugin	-	-
+Context7	upstash/context7	context7@context7-marketplace	upstash/context7	context7@context7-marketplace	plugin	-	-
+Caveman	JuliusBrussee/caveman	caveman@caveman	thinkhome-org/caveman-codex	caveman@thinkhome-caveman	plugin	-	-
+Humanizer	blader/humanizer	humanizer@humanizer	-	-	skill	blader/humanizer	-
+Impeccable	pbakaus/impeccable	impeccable@impeccable	-	-	impeccable	-	-
+Anthropic Frontend Design	anthropics/claude-plugins-official	frontend-design@claude-plugins-official	-	-	skill	anthropics/skills	frontend-design
diff --git a/docs/plugins.md b/docs/plugins.md
index 32ffeac..5d84d3d 100644
--- a/docs/plugins.md
+++ b/docs/plugins.md
@@ -2,7 +2,9 @@
 
 The user-level plugin manifest is `adapters/plugins.tsv`. It maps each logical plugin to the marketplace selector understood by Claude Code and Codex.
 
-The current baseline includes Ponytail, i-have-adhd, Superpowers, and Context7. The install script operates at user scope and is idempotent: a normal run only installs missing plugins (a disabled but already-installed Claude plugin is re-enabled). Pass `-UpdatePlugins`/`--update-plugins` to also update plugins that are already installed, so a configuration update never silently updates third-party plugin code.
+The current baseline includes Ponytail, i-have-adhd, Superpowers, Context7, Caveman, Humanizer, Impeccable, and Anthropic Frontend Design. The install script operates at user scope and is idempotent: a normal run only installs missing plugins (a disabled but already-installed Claude plugin is re-enabled). Pass `-UpdatePlugins`/`--update-plugins` to also update plugins that are already installed, so a configuration update never silently updates third-party plugin code.
+
+Codex receives Caveman through its native plugin adapter. Humanizer and Anthropic Frontend Design are installed through the cross-agent Skills CLI; Impeccable uses its provider-aware Codex installer. All four are therefore available to both clients, although Codex does not expose all four as marketplace plugins.
 
 Plugin installation requires the corresponding client CLI, network access, and any authentication required by the plugin. Context7 may open an OAuth flow. Codex or plugin hooks may require a trust review in `/hooks`. The scripts never install plugins during a build or doctor run and never install them when `--dry-run` or `-DryRun` is used.
 
diff --git a/scripts/lib/plugins.ps1 b/scripts/lib/plugins.ps1
index 22a92b9..b34f2b7 100644
--- a/scripts/lib/plugins.ps1
+++ b/scripts/lib/plugins.ps1
@@ -85,6 +85,20 @@ function Install-ConfiguredPlugins {
             $plugin = if ($selectedClient -eq 'Claude') { $entry.claude_plugin } else { $entry.codex_plugin }
             if ([string]::IsNullOrWhiteSpace($plugin)) { throw ('Plugin selector missing for {0}: {1}' -f $selectedClient, $entry.name) }
 
+            if ($selectedClient -eq 'Codex' -and $entry.codex_method -ne 'plugin') {
+                if ($entry.codex_method -eq 'skill') {
+                    $arguments = @('-y','skills','add',$entry.codex_source,'--global','--agent','codex')
+                    if ($entry.codex_skill -ne '-') { $arguments = @('-y','skills','add',$entry.codex_source,'--skill',$entry.codex_skill,'--global','--agent','codex') }
+                } elseif ($entry.codex_method -eq 'impeccable') {
+                    $arguments = @('-y','impeccable','install','-y','--providers=codex','--scope=global')
+                } else {
+                    throw "Unknown Codex install method '$($entry.codex_method)' for $($entry.name)."
+                }
+                Invoke-PluginCommand -Command 'npx' -Arguments $arguments -DryRun:$DryRun
+                Write-Output "PASS Codex skill ensured: $($entry.name)"
+                continue
+            }
+
             $installedItem = if ($selectedClient -eq 'Claude') { $installed | Where-Object { $_.id -eq $plugin } | Select-Object -First 1 } else { $installed | Where-Object { $_.pluginId -eq $plugin } | Select-Object -First 1 }
             if ($Update -and $selectedClient -eq 'Claude' -and $null -ne $installedItem) {
                 Invoke-PluginCommand -Command 'claude' -Arguments @('plugin','update',$plugin) -DryRun:$DryRun
diff --git a/scripts/lib/plugins.sh b/scripts/lib/plugins.sh
index 10f1da0..b398d0d 100755
--- a/scripts/lib/plugins.sh
+++ b/scripts/lib/plugins.sh
@@ -53,8 +53,8 @@ install_configured_plugins() {
     *) printf 'Unknown plugin client selection: %s\n' "$client_selection" >&2; return 1;;
   esac
 
-  local client name claude_marketplace claude_plugin codex_marketplace codex_plugin marketplace plugin
-  while IFS=$'\t' read -r name claude_marketplace claude_plugin codex_marketplace codex_plugin; do
+  local client name claude_marketplace claude_plugin codex_marketplace codex_plugin codex_method codex_source codex_skill marketplace plugin
+  while IFS=$'\t' read -r name claude_marketplace claude_plugin codex_marketplace codex_plugin codex_method codex_source codex_skill; do
     [ "$name" = name ] && continue
     [ -n "$name" ] || continue
     [ "$claude_marketplace" = - ] && claude_marketplace=
@@ -62,6 +62,23 @@ install_configured_plugins() {
     for client in "${clients[@]}"; do
       if [ "$client" = claude ]; then marketplace=$claude_marketplace; plugin=$claude_plugin; else marketplace=$codex_marketplace; plugin=$codex_plugin; fi
       [ -n "$plugin" ] || { printf 'Plugin selector missing for %s: %s\n' "$client" "$name" >&2; return 1; }
+      if [ "$client" = codex ] && [ "$codex_method" != plugin ]; then
+        case "$codex_method" in
+          skill)
+            if [ "$codex_skill" = - ]; then
+              run_plugin_command "$dry_run" npx -y skills add "$codex_source" --global --agent codex
+            else
+              run_plugin_command "$dry_run" npx -y skills add "$codex_source" --skill "$codex_skill" --global --agent codex
+            fi
+            ;;
+          impeccable)
+            run_plugin_command "$dry_run" npx -y impeccable install -y --providers=codex --scope=global
+            ;;
+          *) printf 'Unknown Codex install method for %s: %s\n' "$client" "$name" >&2; return 1;;
+        esac
+        printf 'PASS Codex skill ensured: %s\n' "$name"
+        continue
+      fi
       if [ "$dry_run" = false ] && plugin_installed "$client" "$plugin"; then
         if [ "$update" = true ] && [ "$client" = claude ]; then
           run_plugin_command "$dry_run" claude plugin update "$plugin"