The first is the script mentioned yesterday, tidied up a little and renamed.
The second is a little adapter class that allows you to use Hamcrest Matchers as AssertJ Conditions. So, if you have some really complex Hamcrest matcher stuff, you can migrate it easily:
final String actual = "how now brown cow"; assertThat(actual).is(matchedBy(Matchers.containsString("now brown")));
The adapter is provided by that “matchedBy” factory method. But the github repo has a full README for details.