Drawing the Architecture Diagram

An architecture diagram should help you explain a design decision. It does not need to include every class.

Start with one user action and draw the components needed to follow that action. Add detail when it explains ownership, failure, or recovery.

State the scope and the meaning of arrows

For an order cancellation question, the scope might be the client, local storage, and the API contract. The server's internal services can remain outside the diagram.

Explain what each arrow means. It may represent a command, observed data, or a code dependency