Complex sentence: At its core you will find a Factory (object-oriented programming) pattern where the framework requests us to instantiate all our components and a Chain-of-responsibility pattern which makes rewiring your applications very easy.
Split into simpler sentences: At its core the framework makes use of the Factory (object-oriented programming) and requests that all components be constructed in one place. Also part of the core is the request handling Chain-of-responsibility pattern which makes rewiring application components very easy.