I think we have different definitions of meaningful code, most of these are pulling in an NPM package which practically completes the given task by itself. For example the "YAML to JSON converter" uses js-yaml... which parses YAML and outputs a Javascript object that can be trivially serialized to JSON. The core of that "project" is literally two lines of code after importing that library.

  const jsonObj = jsyaml.load(yamlText);
  const jsonText = JSON.stringify(jsonObj, null, 2);

Don't get me wrong, if you want to convert YAML to JSON then using a battle tested library is the way to do it, but Claude doesn't deserve a round of applause for stating the blaringly obvious.