# Architecture

Harakumo is an app's whole backend behind one client. Your front end and server deploy to the Harakumo edge; every capability the app needs is a namespace on the same SDK or a path on the same API, already wired together. The diagram shows a real shape — an online store, end to end — with the role each service plays.

Your server holds the API key; browsers get only what your server hands them (signed upload and download URLs, checkout links) or the auth pool's publishable client id.