API engineering

The API engineering collection follows a system from its first resource definition to the failure cases that make a real integration difficult. Begin with the architecture guide to separate original records, transformations, and workflow state. Then use the journal-schema article to turn that separation into a concrete data contract that preserves revisions and uncertainty.

The integration and testing guides belong together. A documented retry rule is only useful when the application can recover from a timeout without duplicating work or waiting forever. The security article adds the resource ownership and lifecycle questions that must remain true across every route, export, and background worker.

A practical reading route

Read architecture first, schema second, and reliability third. Use the privacy review to map where each derivative goes, then build tests for the specific promises you intend to make. You do not need to adopt every pattern at once. Choose a small, complete vertical slice and make its behavior understandable before expanding the interface.

This collection focuses on implementation reasoning, not claims of an existing hosted service. Example fields and workflows are design proposals. Check a chosen provider's actual contract before relying on operational guarantees, and keep application authorization separate from model behavior.