diff --git a/run_once_after_install-claude-plugins.sh b/run_once_after_install-claude-plugins.sh
new file mode 100755
index 0000000..79afe12
--- /dev/null
+++ b/run_once_after_install-claude-plugins.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+# This script runs once after chezmoi apply on a new machine
+
+set -e
+
+# Check if claude is available
+if ! command -v claude &> /dev/null; then
+    echo "Claude CLI not found, skipping plugin installation"
+    exit 0
+fi
+
+echo "Installing Claude marketplaces..."
+claude /add-marketplace anthropics/claude-plugins-official 2>/dev/null || true
+claude /add-marketplace anthropics/skills 2>/dev/null || true
+claude /add-marketplace obra/superpowers-marketplace 2>/dev/null || true
+
+echo "Installing Claude plugins..."
+claude /install-plugin code-simplifier@claude-plugins-official 2>/dev/null || true
+claude /install-plugin ralph-loop@claude-plugins-official 2>/dev/null || true
+claude /install-plugin superpowers@claude-plugins-official 2>/dev/null || true
+
+echo "Claude plugins installed successfully"