Ask HN: What do your require in your JS framework?

I'm working on a new JavaScript framework that will (hopefully) incite a better web. The framework has very basic functionality right now (but works well/fast). It's a more chain-friendly way of doing things:

  var x = function () {
    this.each(function (value, i) {
      value.innerHTML = i + "...";
    });
  };
  $('id1', '#id2', '.class3').show.then(x);

A great framework includes:

  * DOM selection, helpers, and manipulation
  * AJAX capabilities
  * Ease of use and documentation
  * Extension possibilities
  * Some animation framework extension

My question to the Hacker News community is what you'd consider the bare minimums I should release version 0.5 with?