Weekly report

gistfile1.txt

function weeklyReport(params,signature,original_time)
{
  var output = [];
  
  new Board(params).cards().each(function(card)
  {
    output.push(getCardSizeData(card)+" in list "+card.currentList().name());
  });
  
  MailApp.send("user@example.org","Your report",output.join("\n"));
  ExecutionQueue.push("weeklyReport",params,signature,original_time.addDays(7).at("9:00"));
}

function getCardSizeData(card)
{
  //use the pluginData API to fetch what you need
}