This document discusses platform app deployment through structured automation and customizable opinions. It proposes a framework that defines the deployment lifecycle with API callbacks. This provides a base structure that existing deployment models can implement as opinions. Developers can also provide new deployment opinions for reuse. Cloud Foundry is used as an example, with its self-service API and buildpacks that define the app build, compile, and release lifecycle as callbacks that provide structure and constraints but can be customized. Pre-defined buildpacks offer common deployment opinions for languages like Java, Node.js, and Python.