MarkdownLink.js

CmdUtils.CreateCommand({
  names: ["mdlink", "markdown link"],
  arguments: [{role: "object", nountype: noun_arb_text, label: "search term"}],
  preview: "Replaces the selected text with a Markdown link to the first Google result for that text.",
  execute: function( args ) {
    var baseUrl = "http://ajax.googleapis.com/ajax/services/search/web";
    var params = {v: "1.0", q: args.object.text};
    jQuery.getJSON( baseUrl, params, function( results ) {
      CmdUtils.setSelection( "[" + args.object.text + "](" + results.responseData.results[0].url + ")" );
    })
  }
});