Nomad changes

docs/snippets/ruby/mcp/mcp_custom_client.md

@@ -0,0 +1,21 @@
+```ruby title="Ruby"
+require 'json'
+require 'open3'
+
+Open3.popen3('kreuzberg', 'mcp') do |stdin, stdout, stderr, wait_thr|
+  request = {
+    method: 'tools/call',
+    params: {
+      name: 'extract_file',
+      arguments: { path: 'document.pdf', async: true }
+    }
+  }
+
+  stdin.puts JSON.generate(request)
+  stdin.close_write
+
+  response = stdout.gets
+  result = JSON.parse(response)
+  puts JSON.pretty_generate(result)
+end
+```