For Spec see client-spec.md.

To run - Load as Intellij IDEA project and run Main.java as Java CLI. Supply single argument - the URL to GET from. It should return an array of JSON documents, each only with a "numbers" field. Said field should contain an array of integers. See src/test/resources/simpleArray for example.

If you get an error like "Could not find or load main class in intelliJ IDEA" then you'll need to change the "output" directory under File -> Project Structure.