public/search.xml

<?xml version="1.0"?>
<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/" xmlns:moz="http://www.mozilla.org/2006/browser/search/">
  <ShortName>Hack/HHVM Docs</ShortName>
  <Description>Hack/HHVM Documentation Search</Description>
  <InputEncoding>UTF-8</InputEncoding>
  <Url type="text/html" method="get" template="http://docs.hhvm.com/j/{searchTerms}" />
</OpenSearchDescription>