diff --git a/docs/index.html b/docs/index.html
index 701360b..7fc88b1 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -178,6 +178,32 @@
                 <div class="grid md:grid-cols-2 lg:grid-cols-3 gap-6" id="casks-container">
                     <!-- CASKS_START -->
 
+                    <!-- harness-sync -->
+                    <div class="glass p-6 rounded-xl group hover:shadow-lg transition-all duration-300">
+                        <div class="flex items-start gap-4 mb-4">
+                            <div class="w-12 h-12 rounded-xl bg-gradient-to-br from-gray-500 to-gray-600 flex items-center justify-center flex-shrink-0 group-hover:scale-110 transition-transform duration-300">
+                                <i class="fas fa-cube text-white text-lg"></i>
+                            </div>
+                            <div class="flex-1">
+                                <h3 class="font-bold text-gray-900 dark:text-gray-100 text-lg">harness-sync</h3>
+                                <span class="text-xs text-gray-500 dark:text-gray-400">v0.22.1</span>
+                            </div>
+                        </div>
+                        <p class="text-sm text-gray-600 dark:text-gray-400 mb-4">Sync skills, agents, MCP, and LLM endpoints across multiple LLM harnesses</p>
+                        <div class="flex flex-wrap gap-2 mb-4">
+                            <span class="px-2 py-1 bg-gray-100 dark:bg-gray-900/30 text-gray-700 dark:text-gray-300 rounded text-xs">CLI</span>
+                        </div>
+                        <div class="flex gap-2">
+                            <a href="https://github.com/lukaszraczylo/harness-sync" target="_blank" class="flex-1 text-center px-3 py-2 bg-gray-100 dark:bg-gray-800 hover:bg-gray-200 dark:hover:bg-gray-700 rounded-lg text-sm font-medium transition-colors">
+                                <i class="fab fa-github mr-1"></i>GitHub
+                            </a>
+                        </div>
+                        <div class="code-block mt-4">
+                            <pre class="bg-gray-900 text-gray-100 p-3 pr-16 rounded-lg text-xs overflow-x-auto"><code>brew install --cask lukaszraczylo/taps/harness-sync</code></pre>
+                            <button class="copy-btn" onclick="copyCode(this)" title="Copy to clipboard"><i class="fas fa-copy"></i></button>
+                        </div>
+                    </div>
+
                     <!-- kportal -->
                     <div class="glass p-6 rounded-xl group hover:shadow-lg transition-all duration-300">
                         <div class="flex items-start gap-4 mb-4">